samu solomon - Academia.edu (original) (raw)
Papers by samu solomon
Oriental Journal Of Chemistry
By manipulating the physico-chemical conditions, the adsorption characteristics study on the remo... more By manipulating the physico-chemical conditions, the adsorption characteristics study on the removal of the therapeutic drug Diclofenac on the Acid Digested Carbon of waste Leather (ADCL) were analysed. The smallest particle size affords the most surface area and more adsorbed material (92.43% for 0-63 micron). The adsorption of diclofenac on this acid-digested carbon of waste leather required acidic pH ranges. Nevertheless, different adsorbates preferred various acidic pH ranges between 1 and 6. In this instance, 92.15% of adsorption occurs at pH 5. The results of this study revealed that the percentage of diclofenac adsorption is directly proportional to the dosage and contact time of the adsorbent and inversely proportional to the initial concentration of the adsorbate. Due to the absence of a chemical bond forming between the adsorbent and adsorbate, the order of this adsorption is pseudo-second order kinetics, and therefore falls under the category of physisorption. For these e...
Ecology, Environment and Conservation
The adsorption characteristics study on the removal of therapeutic drug ibuprofen on the acid dig... more The adsorption characteristics study on the removal of therapeutic drug ibuprofen on the acid digested carbon of waste leather were analysed by varying the physico-chemical conditions. The minimum particle size gives maximum number of surface area and adsorbed more, 91.25% for 0-63 micron. Acidic pH ranges were optable for the adsorption of ibuprofen on this ADCL. But different adsorbates preferred different acidic pH ranges of pH from 1 – 6. In this case at pH 5, 93.1% of adsorption takes place. The percentage of adsorption of ibuprofen is directly proportional to the adsorbent dosage and contact time and inversely proportional to the initial concentration of the adsorbate were found out from this study. Order of this adsorption is pseudo second order kinetics and it belongs to the physisorption, because of no chemical bond formation between the adsorbent and adsorbate. The fruendlich and Langmuir isotherm model is fit for these studies. The thermodynamic study reveals the negative...
Oriental Journal Of Chemistry
The adsorption characteristics study on the removal of therapeutic drug naproxen on the acid dige... more The adsorption characteristics study on the removal of therapeutic drug naproxen on the acid digested carbon of waste leather were analysed by varying the physico-chemical conditions. Effect of particle size, adsorbent dosage, pH, temperature, initial concentration of adsorbate and contact time were analysed carefully by batch mode. The minimum particle size gives maximum number of surface area and adsorbed more, 90.89% for 0-63 micron. Acidic pH ranges were desirable for the adsorption of naproxen on this Acid digested carbon of waste Leather (ADCL). But different adsorbates preferred different acidic pH ranges of pH from 1 – 6. Above pH 6 precipitations of drugs takes place. In this case at pH 1, 96.87% of adsorption takes place. The percentage of adsorption of naproxen is directly proportional to the adsorbent dosage and contact time and inversely proportional to the initial concentration of the adsorbate were found out from this study. Order of this adsorption is pseudo second o...
Transactions of the …, 2001
Résumé/Abstract The inhibitive influence of salicylic acid, as well as phthalic acid in conjuncti... more Résumé/Abstract The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium acetate, on the corrosion of aluminium in 1.0 N NaOH was studied by weight loss, gasometric and polarisation measurements. The inhibition efficiency ...
Ecology, Environment and Conservation
The feasibility of doing away with Acid Orange II dye from aqueous solutions the usage of adsorbe... more The feasibility of doing away with Acid Orange II dye from aqueous solutions the usage of adsorbent Activated Carbon of waste leather (ACWL) has been analysed. Batch mode adsorption researches are carried out in order to inspect the adsorption capacities of this adsorbent by using various initial dye concentration, contact time, temperature and pH. Results expose that adsorption capability decreases from 95.07% to 76.04% for (ACWL) at 30 °C with an expand in the initial concentration from 10 to 60 mgl-1. The calculated qe values agree very properly with experimental values. The regression coefficient values above 0.99 verify that adsorption follows 2nd order kinetics. The enlarge in Langmuir adsorption potential (q0) is 17.66784 mgl-1 (ACWL) on growing the temperature from 30 to 60°C bills for the endothermic nature of the process. The current study confirms the potentiality of plentiful low price solid waste leather and its availability for the elimination of acidic dyes from aqu...
International Journal of Fisheries and Aquatic Studies, 2017
The features of the formation of aquatic plant communities and their spatial distribution at the ... more The features of the formation of aquatic plant communities and their spatial distribution at the outlet sections of the waterways of the Volga delta are shown. It can be noted that the coastal-aquatic vegetation of kultuk zone and island zone of the avandelta of the studied areas is similar in species composition, but differs in the structure of communities, projective cover and the abundance of individual species. In the riverbed area where the flow is strong enough with silty-sandy deposits the mass development of the reophilic communities of Potamogeton lucens is traced. With the weakening of the flow on the silty sediments forbs association with (Butomus umbellatus, Sparganium ramosum, Nymphoides peltata, Trapa natans, Ceratophyllum demersum and other plants observed. In the kultuk zone, mosaic poly dominant communities (Phragmites, Sparganium, Potamogeton spp., Vallisneria and other hydrophytes) are noted. The submerged vegetation is represented by the communities of Potamogeto...
Asian Journal of Microbiology, Biotechnology and Environmental Sciences
In this study, activated carbon synthesized from Waste Leathers was used as a sorbent to put off ... more In this study, activated carbon synthesized from Waste Leathers was used as a sorbent to put off 4- chlorophenol (4-CP) from aqueous solutions. They have an effect of contact time (30-180 minutes), pH (1-6), adsorbent dosage (50-200 mg/l), and preliminary 4-CP concentration (10-60 mgl-1) in batch experiment used to be investigated on the sorption. The sorbent used to be distinct for the use of scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectrometer and X-ray diffraction, and XRD. Equilibrium for 4-CP sorption used to be reached at contact time of a 180 minutes. The pH of 1 used to be additionally determined to be the top of the line pH in the sorption process. Fitting the experimental statistics to special kinetic and isotherm models illustrated that the experimental facts was properly geared up via pseudo-second order kinetic (R2>0.97) and Freundlich isotherm (R2 > 0.98) models. According to the results, activated carbon prepared from Waste Leathers...
Copper Chlorides doped Glycine Picrate crystals have been grown by slow evaporation technique at ... more Copper Chlorides doped Glycine Picrate crystals have been grown by slow evaporation technique at room temperature. The crystal system has been identified and lattice dimensions have been measured using X-ray diffraction analysis. The functional groups of the grown crystals were qualitatively examined using FTIR analysis.
The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Pb (II) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l −1 ). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (∆G•) and heat of adsorption (∆H•) were calculated. The ∆G• and ∆H• values for Pb (II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of ...
Data in Brief, 2018
in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried ou... more in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried out by FT-Raman spectral analysis and high resolution transmission electron microscopy (HR-TEM). Particle size of the caffeine loaded PNTs is o 40 nm. The FT-Raman spectrum signals are enhanced in the region of 400-1700 cm −1. These data are ideal tool for the applications like biosensing and drug delivery research (DDS).
Any compound capable of donating free chlorine ions (Cl-) to an aqueous (water-based) solution ha... more Any compound capable of donating free chlorine ions (Cl-) to an aqueous (water-based) solution has the potential for causing failure in stainless steels. The chlorine ion is extremely electronegative, therefore very reactive with certain compounds and elements. This reactivity is part of its usefulness in certain situations, but becomes a double-edged sword where stainless steel is concerned. Experimental corrosion studies on commercial SS- 304 have been carried out. The experiments were carried in brackish environment with a concentration variation, pH variation and contact time variation. The experiments were carried out by weight loss method, gasometry study and open circuit polarization studies. The post corrosion sample’s micro structures were analyzed with the aid of EDS (Energy dispersive spectroscopy) equipped SEM (Scanning Electron Microscope) EDS (Energy dispersive spectroscopy) instrument to detect the morphology of corrosion by-products. For further verification x-ray di...
The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Pb (II) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l −1 ). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (∆G•) and heat of adsorption (∆H•) were calculated. The ∆G• and ∆H• values for Pb (II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of ...
The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium ... more The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium acetate, on the corrosion of aluminium in 1.0 N NaOH was studied by weight loss, gasometric and polarisation measurements. The inhibition efficiency values, determined by these techniques, showed close agreement. The combination of salicylic acid (or phthalic acid) and calcium acetate was found to show synergistic inhibition effect. The shift in the steady OCP values for aluminium electrode dipped in 1.0 N NaOH, caused by the increasing addition of the inhibitor, was not considerable. The polarisation studies revealed that the corrosion of aluminum in 1.0 N NaOH was predominantly under anodic control, in the presence as well as in the absence of the inhibitor. The nature of inhibition was found to be of mixed type.
The studies on adsorption of Cu (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Cu (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Cu (II)) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l
The green fabrication of metal nanoparticles by using botanical extracts is significantly importa... more The green fabrication of metal nanoparticles by using botanical extracts is significantly important for increasing research attention in nanotechnology, since it does not require high energy inputs or the production of highly toxic chemicalbyproducts. Here, silver (Ag), gold (Au) and their bimetallic (Ag/Au) nanoparticles (NPs) were green synthesized using the Crescentiaalata aqueous flower extract. Metal NPs were studied by spectroscopic (UV–visible spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, XRD and EDX) and microscopic (AFM and TEM) analysis. AFM and TEM showed that Ag and Au NPs had triangular and spherical morphologies, with an average size of 20 nm. Bimetallic Ag/Au NPs showed spherical shapes with an average size of 10 nm. Ag and Ag/Au bimetallic NPs showed high antibacterial and antibiofilm activities towards Gram-positive and Gram-negative bacteria. Overall, the proposed synthesis route of Ag, Au and Ag/Au bimetallic NPs can be exploited by the pharmaceutic...
Natural plant material Saccharum spontaneum is used for the removal of the industrial dye (Titan ... more Natural plant material Saccharum spontaneum is used for the removal of the industrial dye (Titan yello w)from aqueous solution. The effects of contact time ,temp eratures , initial concentrations and pH values hav e been investigated . Langmuir and Freundlich isotherms ar e fitted on the experimental data of adsorption of the studied system. Depending on the results obtained from the effect of temperatures , the thermodynamic paramete rs ( âA‚ˆA‚† G°, âA‚ˆA‚† H° and âA‚ˆA‚† S°) are estimated. The work also included kinetic s tudy conducted by applying two kinetic models, the pseudo first and second order equations . The resul ts proved that, the studied system follows the pseu do second order model indicated by the agreement between the experimental and calculated values of adsorption ca pacity (qe) at equilibrium .The concentration of the adsorbed d ye is determined spectrophotometerically.
The significance of thiosemicarbazone and their complexes, apart from their diverse chemical and ... more The significance of thiosemicarbazone and their complexes, apart from their diverse chemical and structural characteristics, stems from not only their potential but also their proved application as biologically active particles. The full application and structural diversity of complexes of thiosemicarbazone prompted us to synthesize the tridentate NNO- donor thiosemicarbazones and their complexes. Due to good chelating ability, the present work is mainly concerned with the studies on complexes of 2-Chlorobenzaldehyde, Thiosemicarbazones. By emphasizing this point the objectives of the present work are as follows: synthesis of the 2-Chlorobenzaldehyde thiosemicarbazone (2-[(2-Chlorobenzylidene)]) Hydrazine carbothioamide. The composition of 2-Chlorobenzaldehyde was determined by the spectral analysis. For the characterization of this compound by 1HNMR and IR spectral studies. The complexes of 2-chloro benzaldehyde were characterized by 1HNMR, 13CNMR, IR and UV spectral studies. The 2...
Advanced Science, Engineering and Medicine
Data in Brief, Feb 1, 2018
in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried ou... more in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried out by FT-Raman spectral analysis and high resolution transmission electron microscopy (HR-TEM). Particle size of the caffeine loaded PNTs is o 40 nm. The FT-Raman spectrum signals are enhanced in the region of 400-1700 cm −1. These data are ideal tool for the applications like biosensing and drug delivery research (DDS).
Oriental Journal Of Chemistry
By manipulating the physico-chemical conditions, the adsorption characteristics study on the remo... more By manipulating the physico-chemical conditions, the adsorption characteristics study on the removal of the therapeutic drug Diclofenac on the Acid Digested Carbon of waste Leather (ADCL) were analysed. The smallest particle size affords the most surface area and more adsorbed material (92.43% for 0-63 micron). The adsorption of diclofenac on this acid-digested carbon of waste leather required acidic pH ranges. Nevertheless, different adsorbates preferred various acidic pH ranges between 1 and 6. In this instance, 92.15% of adsorption occurs at pH 5. The results of this study revealed that the percentage of diclofenac adsorption is directly proportional to the dosage and contact time of the adsorbent and inversely proportional to the initial concentration of the adsorbate. Due to the absence of a chemical bond forming between the adsorbent and adsorbate, the order of this adsorption is pseudo-second order kinetics, and therefore falls under the category of physisorption. For these e...
Ecology, Environment and Conservation
The adsorption characteristics study on the removal of therapeutic drug ibuprofen on the acid dig... more The adsorption characteristics study on the removal of therapeutic drug ibuprofen on the acid digested carbon of waste leather were analysed by varying the physico-chemical conditions. The minimum particle size gives maximum number of surface area and adsorbed more, 91.25% for 0-63 micron. Acidic pH ranges were optable for the adsorption of ibuprofen on this ADCL. But different adsorbates preferred different acidic pH ranges of pH from 1 – 6. In this case at pH 5, 93.1% of adsorption takes place. The percentage of adsorption of ibuprofen is directly proportional to the adsorbent dosage and contact time and inversely proportional to the initial concentration of the adsorbate were found out from this study. Order of this adsorption is pseudo second order kinetics and it belongs to the physisorption, because of no chemical bond formation between the adsorbent and adsorbate. The fruendlich and Langmuir isotherm model is fit for these studies. The thermodynamic study reveals the negative...
Oriental Journal Of Chemistry
The adsorption characteristics study on the removal of therapeutic drug naproxen on the acid dige... more The adsorption characteristics study on the removal of therapeutic drug naproxen on the acid digested carbon of waste leather were analysed by varying the physico-chemical conditions. Effect of particle size, adsorbent dosage, pH, temperature, initial concentration of adsorbate and contact time were analysed carefully by batch mode. The minimum particle size gives maximum number of surface area and adsorbed more, 90.89% for 0-63 micron. Acidic pH ranges were desirable for the adsorption of naproxen on this Acid digested carbon of waste Leather (ADCL). But different adsorbates preferred different acidic pH ranges of pH from 1 – 6. Above pH 6 precipitations of drugs takes place. In this case at pH 1, 96.87% of adsorption takes place. The percentage of adsorption of naproxen is directly proportional to the adsorbent dosage and contact time and inversely proportional to the initial concentration of the adsorbate were found out from this study. Order of this adsorption is pseudo second o...
Transactions of the …, 2001
Résumé/Abstract The inhibitive influence of salicylic acid, as well as phthalic acid in conjuncti... more Résumé/Abstract The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium acetate, on the corrosion of aluminium in 1.0 N NaOH was studied by weight loss, gasometric and polarisation measurements. The inhibition efficiency ...
Ecology, Environment and Conservation
The feasibility of doing away with Acid Orange II dye from aqueous solutions the usage of adsorbe... more The feasibility of doing away with Acid Orange II dye from aqueous solutions the usage of adsorbent Activated Carbon of waste leather (ACWL) has been analysed. Batch mode adsorption researches are carried out in order to inspect the adsorption capacities of this adsorbent by using various initial dye concentration, contact time, temperature and pH. Results expose that adsorption capability decreases from 95.07% to 76.04% for (ACWL) at 30 °C with an expand in the initial concentration from 10 to 60 mgl-1. The calculated qe values agree very properly with experimental values. The regression coefficient values above 0.99 verify that adsorption follows 2nd order kinetics. The enlarge in Langmuir adsorption potential (q0) is 17.66784 mgl-1 (ACWL) on growing the temperature from 30 to 60°C bills for the endothermic nature of the process. The current study confirms the potentiality of plentiful low price solid waste leather and its availability for the elimination of acidic dyes from aqu...
International Journal of Fisheries and Aquatic Studies, 2017
The features of the formation of aquatic plant communities and their spatial distribution at the ... more The features of the formation of aquatic plant communities and their spatial distribution at the outlet sections of the waterways of the Volga delta are shown. It can be noted that the coastal-aquatic vegetation of kultuk zone and island zone of the avandelta of the studied areas is similar in species composition, but differs in the structure of communities, projective cover and the abundance of individual species. In the riverbed area where the flow is strong enough with silty-sandy deposits the mass development of the reophilic communities of Potamogeton lucens is traced. With the weakening of the flow on the silty sediments forbs association with (Butomus umbellatus, Sparganium ramosum, Nymphoides peltata, Trapa natans, Ceratophyllum demersum and other plants observed. In the kultuk zone, mosaic poly dominant communities (Phragmites, Sparganium, Potamogeton spp., Vallisneria and other hydrophytes) are noted. The submerged vegetation is represented by the communities of Potamogeto...
Asian Journal of Microbiology, Biotechnology and Environmental Sciences
In this study, activated carbon synthesized from Waste Leathers was used as a sorbent to put off ... more In this study, activated carbon synthesized from Waste Leathers was used as a sorbent to put off 4- chlorophenol (4-CP) from aqueous solutions. They have an effect of contact time (30-180 minutes), pH (1-6), adsorbent dosage (50-200 mg/l), and preliminary 4-CP concentration (10-60 mgl-1) in batch experiment used to be investigated on the sorption. The sorbent used to be distinct for the use of scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectrometer and X-ray diffraction, and XRD. Equilibrium for 4-CP sorption used to be reached at contact time of a 180 minutes. The pH of 1 used to be additionally determined to be the top of the line pH in the sorption process. Fitting the experimental statistics to special kinetic and isotherm models illustrated that the experimental facts was properly geared up via pseudo-second order kinetic (R2>0.97) and Freundlich isotherm (R2 > 0.98) models. According to the results, activated carbon prepared from Waste Leathers...
Copper Chlorides doped Glycine Picrate crystals have been grown by slow evaporation technique at ... more Copper Chlorides doped Glycine Picrate crystals have been grown by slow evaporation technique at room temperature. The crystal system has been identified and lattice dimensions have been measured using X-ray diffraction analysis. The functional groups of the grown crystals were qualitatively examined using FTIR analysis.
The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Pb (II) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l −1 ). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (∆G•) and heat of adsorption (∆H•) were calculated. The ∆G• and ∆H• values for Pb (II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of ...
Data in Brief, 2018
in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried ou... more in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried out by FT-Raman spectral analysis and high resolution transmission electron microscopy (HR-TEM). Particle size of the caffeine loaded PNTs is o 40 nm. The FT-Raman spectrum signals are enhanced in the region of 400-1700 cm −1. These data are ideal tool for the applications like biosensing and drug delivery research (DDS).
Any compound capable of donating free chlorine ions (Cl-) to an aqueous (water-based) solution ha... more Any compound capable of donating free chlorine ions (Cl-) to an aqueous (water-based) solution has the potential for causing failure in stainless steels. The chlorine ion is extremely electronegative, therefore very reactive with certain compounds and elements. This reactivity is part of its usefulness in certain situations, but becomes a double-edged sword where stainless steel is concerned. Experimental corrosion studies on commercial SS- 304 have been carried out. The experiments were carried in brackish environment with a concentration variation, pH variation and contact time variation. The experiments were carried out by weight loss method, gasometry study and open circuit polarization studies. The post corrosion sample’s micro structures were analyzed with the aid of EDS (Energy dispersive spectroscopy) equipped SEM (Scanning Electron Microscope) EDS (Energy dispersive spectroscopy) instrument to detect the morphology of corrosion by-products. For further verification x-ray di...
The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Pb (II) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l −1 ). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (∆G•) and heat of adsorption (∆H•) were calculated. The ∆G• and ∆H• values for Pb (II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of ...
The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium ... more The inhibitive influence of salicylic acid, as well as phthalic acid in conjunction with calcium acetate, on the corrosion of aluminium in 1.0 N NaOH was studied by weight loss, gasometric and polarisation measurements. The inhibition efficiency values, determined by these techniques, showed close agreement. The combination of salicylic acid (or phthalic acid) and calcium acetate was found to show synergistic inhibition effect. The shift in the steady OCP values for aluminium electrode dipped in 1.0 N NaOH, caused by the increasing addition of the inhibitor, was not considerable. The polarisation studies revealed that the corrosion of aluminum in 1.0 N NaOH was predominantly under anodic control, in the presence as well as in the absence of the inhibitor. The nature of inhibition was found to be of mixed type.
The studies on adsorption of Cu (II) were conducted by varying various parameters such as contact... more The studies on adsorption of Cu (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Cu (II)) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlichpeterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l
The green fabrication of metal nanoparticles by using botanical extracts is significantly importa... more The green fabrication of metal nanoparticles by using botanical extracts is significantly important for increasing research attention in nanotechnology, since it does not require high energy inputs or the production of highly toxic chemicalbyproducts. Here, silver (Ag), gold (Au) and their bimetallic (Ag/Au) nanoparticles (NPs) were green synthesized using the Crescentiaalata aqueous flower extract. Metal NPs were studied by spectroscopic (UV–visible spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, XRD and EDX) and microscopic (AFM and TEM) analysis. AFM and TEM showed that Ag and Au NPs had triangular and spherical morphologies, with an average size of 20 nm. Bimetallic Ag/Au NPs showed spherical shapes with an average size of 10 nm. Ag and Ag/Au bimetallic NPs showed high antibacterial and antibiofilm activities towards Gram-positive and Gram-negative bacteria. Overall, the proposed synthesis route of Ag, Au and Ag/Au bimetallic NPs can be exploited by the pharmaceutic...
Natural plant material Saccharum spontaneum is used for the removal of the industrial dye (Titan ... more Natural plant material Saccharum spontaneum is used for the removal of the industrial dye (Titan yello w)from aqueous solution. The effects of contact time ,temp eratures , initial concentrations and pH values hav e been investigated . Langmuir and Freundlich isotherms ar e fitted on the experimental data of adsorption of the studied system. Depending on the results obtained from the effect of temperatures , the thermodynamic paramete rs ( âA‚ˆA‚† G°, âA‚ˆA‚† H° and âA‚ˆA‚† S°) are estimated. The work also included kinetic s tudy conducted by applying two kinetic models, the pseudo first and second order equations . The resul ts proved that, the studied system follows the pseu do second order model indicated by the agreement between the experimental and calculated values of adsorption ca pacity (qe) at equilibrium .The concentration of the adsorbed d ye is determined spectrophotometerically.
The significance of thiosemicarbazone and their complexes, apart from their diverse chemical and ... more The significance of thiosemicarbazone and their complexes, apart from their diverse chemical and structural characteristics, stems from not only their potential but also their proved application as biologically active particles. The full application and structural diversity of complexes of thiosemicarbazone prompted us to synthesize the tridentate NNO- donor thiosemicarbazones and their complexes. Due to good chelating ability, the present work is mainly concerned with the studies on complexes of 2-Chlorobenzaldehyde, Thiosemicarbazones. By emphasizing this point the objectives of the present work are as follows: synthesis of the 2-Chlorobenzaldehyde thiosemicarbazone (2-[(2-Chlorobenzylidene)]) Hydrazine carbothioamide. The composition of 2-Chlorobenzaldehyde was determined by the spectral analysis. For the characterization of this compound by 1HNMR and IR spectral studies. The complexes of 2-chloro benzaldehyde were characterized by 1HNMR, 13CNMR, IR and UV spectral studies. The 2...
Advanced Science, Engineering and Medicine
Data in Brief, Feb 1, 2018
in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried ou... more in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried out by FT-Raman spectral analysis and high resolution transmission electron microscopy (HR-TEM). Particle size of the caffeine loaded PNTs is o 40 nm. The FT-Raman spectrum signals are enhanced in the region of 400-1700 cm −1. These data are ideal tool for the applications like biosensing and drug delivery research (DDS).