Adsorption of Acid Dyes from aqueous solution onto the surface of acid activated Jaswand leaf powder: A case Study (original) (raw)
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Adsorption of Acid Dyes from aqueous solution onto the surface of acid activated Jaswand leaf powder
The plant powder of Nirgudi (L. Vitex negudo) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (Acid blue, Acid red and Malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, initial concentration of adsorbate. Adsorption capacity seems to be enhanced by increasing temperature, adsorbent dose and for pH. Maximum dye adsorption was found to be in acidic range. Nirgudi Leaf powder (NLP) treated with Sulphuric acid (H 2 SO 4 ) solution increased the adsorption efficiency upto 80 percent. Experimental adsorption kinetic data were fitted to be Lagergren first order. Equilibrium data were well represented by the Freundlich Langmuir isotherm model for all tested adsorption systems. Beside these the thermodynamic study has showed that the acid dye adsorption onto the surface of Acid Activated Nirgudi Leaf powder (AANLP) was physical adsorption and the process was spontaneous and exothermic.
The plant powder of Nirgudi (L. Vitex negudo) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (Acid blue, Acid red and Malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, initial concentration of adsorbate. Adsorption capacity seems to be enhanced by increasing temperature, adsorbent dose and for pH. Maximum dye adsorption was found to be in acidic range. Nirgudi Leaf powder (NLP) treated with Sulphuric acid (H 2 SO 4) solution increased the adsorption efficiency upto 80 percent. Experimental adsorption kinetic data were fitted to be Lagergren first order. Equilibrium data were well represented by the Freundlich Langmuir isotherm model for all tested adsorption systems. Beside these the thermodynamic study has showed that the acid dye adsorption onto the surface of Acid Activated Nirgudi Leaf powder (AANLP) was physical adsorption and the process was spontaneous and exothermic.
The plant powder of Nirgudi (L. Vitex negudo) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (Acid blue, Acid red and Malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, initial concentration of adsorbate. Adsorption capacity seems to be enhanced by increasing temperature, adsorbent dose and for pH. Maximum dye adsorption was found to be in acidic range. Nirgudi Leaf powder (NLP) treated with Sulphuric acid (H 2 SO 4 ) solution increased the adsorption efficiency upto 80 percent. Experimental adsorption kinetic data were fitted to be Lagergren first order. Equilibrium data were well represented by the Freundlich Langmuir isotherm model for all tested adsorption systems. Beside these the thermodynamic study has showed that the acid dye adsorption onto the surface of Acid Activated Nirgudi Leaf powder (AANLP) was physical adsorption and the process was spontaneous and exothermic.
Adsorption of acid dyes from aqueous solution on activated bleaching earth
Journal of Colloid and Interface Science, 2004
The plant powder of Nirgudi (L. Vitex negudo) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (Acid blue, Acid red and Malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, initial concentration of adsorbate. Adsorption capacity seems to be enhanced by increasing temperature, adsorbent dose and for pH. Maximum dye adsorption was found to be in acidic range. Nirgudi Leaf powder (NLP) treated with Sulphuric acid (H 2 SO 4 ) solution increased the adsorption efficiency upto 80 percent. Experimental adsorption kinetic data were fitted to be Lagergren first order. Equilibrium data were well represented by the Freundlich Langmuir isotherm model for all tested adsorption systems. Beside these the thermodynamic study has showed that the acid dye adsorption onto the surface of Acid Activated Nirgudi Leaf powder (AANLP) was physical adsorption and the process was spontaneous and exothermic.
Adsorption characteristics of the dye, Brilliant Green, on Neem leaf powder
Dyes and Pigments, 2003
A novel adsorbent was developed from mature leaves of natural Neem trees for removing dyes from water. The adsorbent, in the form of fine powder, was found to be very effective in removing the dye, Brilliant Green, from aqueous solution. The adsorption process was carried out in a batch process with different concentrations of the aqueous dye solution as well as with different adsorbent doses, at a range of pH values and temperature. The suitability of the adsorbent was tested by fitting the adsorption data with Langmuir and Freundlich isotherms and by computing equilibrium thermodynamic and kinetic parameters, the values of which showed the Neem leaf powder as a promising adsorbent for dyes in aqueous solution. #
Potential of Neem Leaf Powder as Bio Adsorbents for Dye Colour Removal
2019
In this study, two types of eco friendly and low cost bio adsorbents, Neem leaf powder NLP and acid treated Neem leaf powder TNLP were prepared for the removal of dye color from Congo red solution. The physicochemical parameters of the prepared absorbents were measured. The structural features of these absorbents were analyzed by FTIR, XRD, and SEM. These experiments were conducted with different process parameters such as adsorbent dosage and agitating time using batch adsorption method. Firstly, the dosage amount of adsorbents was optimized for constant shaking for one hour and it was observed that the maximum percent adsorption was found at 91 of 0.4 g for NLP and 76 of 0.4 g for TNLP. The optimum dosage amount of adsorbents, 0.4 g was selected for further study. After optimizing the adsorbent dosage, the optimum agitating time was observed at 60 min with the percent removal of 91 for NLP and 76 for TNLP. From this research, it was observed that NLP and TNLP can be used as bio ad...
Due to excessive consumption of reactive dyes, textile industrial wastewater having high quantity of these contaminants causes pollution problems. Adsorption is an efficient method for removal of dyes and other contaminations using natural adsorbent as well as activated carbon materials. In this investigation, the removal of Reactive Black 5 and Reactive Green 12 has performed by adsorption method using activated guava leaf powder from dye concentrations of 50 gm/L prepared in deionized water. The equilibrium isotherm and kinetic model were studied by altering different process parameters like adsorbent dosage and contact duration, respectively. Freundlich, Langmuir, Redlich-Peterson, Dubinin-Raduskevich and Temkin isotherms were utilized to describe the equilibrium characteristics of adsorption. The data were analyzed using kinetic models viz. pseudo first-and second-order, intraparticle and Elovich equations. Among all, Freundlich and pseudo isotherm second-order equation were best fitted with the resulting data. The thermodynamic parameters, such as free energy of adsorption (∆G°), enthalpy change (∆H°) and entropy change (∆S°) were also determined and evaluated by varying temperature of a system.
Arabian Journal of Geosciences, 2016
Contamination of surface water and groundwater by organic pollutants is a serious problem due to their persistence, bioaccumulation and biomagnification through food webs. Since the removal of dyes from wastewater is considered an environmental challenge and government legislation requires textile wastewater to be treated, therefore there is a constant need to have an effective process that can efficiently remove these dyes. The aim of the present study is to evaluate the potentiality of dried Carpobrotus edulis plant as low-cost adsorbent for the removal of the industrial acid blue 113 dye from aqueous solutions using the batch equilibration technique. The effects of different physicochemical parameters such as adsorbent dose, contact time, initial dye concentration, solution pH and temperature on adsorption rate of anionic AB113 dye on microparticles of dried C. edulis plant were investigated. The experimental data were analyzed by using mathematical models to determine the thermodynamic parameters. The negative values of free energy change indicated the spontaneous nature of the adsorption and negative value of enthalpy change suggested the exothermic nature of the adsorption process. These results indicate that dried C. edulis plant as an environmentally friendly adsorbent could be potentially used for the removal of anionic dyes from aqueous solutions.