Modification and characterization of amberlite XAD-2 with calcein blue for preconcentration and determination of copper(II) from environmental samples by atomic absorption spectroscopy (original) (raw)
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2010
A new chelating resin is prepared by coupling Amberlite XAD-4 with 1-amino-2-naphthole through an azo spacer. The resulting sorbent has been characterized by FT-IR, elemental analysis and thermogravimetric analysis (TGA) and studied for preconcentrating of Cu (II) using flame atomic absorption spectrometry (FAAS) for metal monitoring. The optimum pH value for sorption of the copper ions was 6.5. The resin was subjected to evaluation through batch binding of mentioned metal ion. Quantitative desorption occurs instantaneously with 0.5 M HNO3. The sorption capacity was found 4.8 mmol.g-1 of resin for Cu (II) in the aqueous solution. The chelating resin can be reused for 10 cycles of sorption-desorption without any significant change in sorption capacity. A recovery of 99% was obtained the metal ions with 0.5 M HNO3 as eluting agent. The method was applied for metal ions determination from industrial waste water sample.
Talanta, 1997
A very stable chelating resin matrix was synthesized by covalently linking o-vanillinthiosemicarbazone (oVTSC) with the benzene ring of the polystyrene-divinylbenzene resin Amberlite XAD-2 through a-N=N-group. The resin was used successfully for the separation and preconcentration of copper(II), zinc(II) and lead(II) prior to their determination by atomic absorption spectrophotometry. The total sorption capacity of the resin was 850, 1500 and 2000 lag g ~ of the resin for Cu(II), Zn(II) and Pb(II), respectively. For the quantitative sorption and recovery of Cu(II), Zn(II) and Pb(II), the optimum pH and eluants were pH 2.5-4.0 and 4 M HC1 or 2 M HNO 3 for Cu(II), pH 5.5 6.5 and 1.0-2.0 M HCI for Zn(II) and pH 6.0-7.5 and 3 M HC1 or 1 M HNO3 for Pb(II). Both, the uptake and stripping of these metal ions were fairly rapid, indicating a better accessibility of the chelating sites. The t~/2 values for Cu(II), Zn(II) and Pb(II) were also determined. Limit of tolerance of some electrolytes like NaC1, NaF, NaNO3, NazSO 4 and Na3PO4 have been reported. The preconcentration factor for Cu(II), Zn(II) and Pb(II) was 90, 140 and 100 respectively. The method was applied for the determination of Cu(II), Zn(II) and Pb(II) in the water samples collected from Sabarmati river, Ahmedabad, India.
Journal of AOAC INTERNATIONAL, 2010
A preconcentration/separation procedure for copper(II), iron(III), and lead(II) ions has been established for use prior to their flame atomic absorption spectrometric determination. The presented procedure is based on adsorption of analyte ions on Amberlite XAD-16 resin as their N-benzoyl-N,N-diisobutylthiourea chelates. The influence of analytical parameters including pH of the solutions and type of eluent on the recoveries of Cu(II), Fe(III), and Pb(II) ions was investigated. The recoveries of the analytes were generally >95. No interference effects were observed from alkaline, earth alkaline, or transition metals on the recoveries of the studied metals. The LODs based on 3 were 1.9 g/L for Cu, 5.9 g/L for Fe, and 3.1 g/L for Pb. Validation of the procedure was carried out by analyzing standard reference material 1568a (rice flour). The procedure was applied to the determination of analytes in natural water samples.
Journal of Hazardous Materials, 2007
The adsorption of Copper(II) onto Amberjet 1500H and Ambersep 252H synthetic ion exchange resins have been studied. All the studies were conducted by a batch method to determine equilibrium and kinetic studies at the solution pH of 5.8 in the concentration ranges from 10 to 20 mg/L. The experimental isotherm data were analyzed using the Freundlich, Langmuir, Redlich Perterson, Temkin, Dubinin-Radushkevich equations. Correlation coefficient was determined for each isotherm analysis. Error functions have been used to determine the alternative single component parameters by non-linear regression due to the bias in using the correlation coefficient resulting from linearisation. From the error analysis the EABS error function provides the best parameters for the isotherm equation in this system. Adsorption kinetics data were tested using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. Kinetic studies showed that the adsorption followed a pseudo-second-order reaction. The initial sorption rate, pseudo-first-order, pseudo-second-order and intraparticle diffusion rate constants for different initial concentrations were evaluated and discussed.
2018
The objective of the work is to a removal of the heavy metal ion of Cu(II) from the wastewater of different industries such as mining and, smelting, plating, brass manufacture, petroleum refining, electroplating industries and Cu-based agrichemicals. In this work, some waste agriculture materials are used as the adsorbent for the elimination of copper particle from the wastewater of Copper plants. Some agricultural materials like rice straw, rice bran, rice husk, rice hyacinth roots, coconut shell and, neem leaves were crushed in roll crusher and then grinded to prepare powdered material and then dried in an oven, then it was used as a copper adsorbent in different pH solutions of copper wastewater. Their resulted solutions were measured by FTIR and some other techniques.
Talanta, 2009
Two novel azocalix[4]pyrrole Amberlite XAD-2 polymeric chelating resins were synthesized by covalently linking diazotized Amberlite XAD-2 with calix[4]pyrrole macrocycles. The chelating resins were used for extraction, preconcentration and sequential separation of metal ions such as Cu(II), Zn(II) and Cd(II) by column chromatography prior to their determination by UV/vis spectrophotometry or flame atomic absorption spectrophotometry (FAAS) or inductively coupled plasma atomic emission spectroscopy (ICP-AES). Various parameters such as effect of pH on absorption, concentration of eluting agents, flow rate, total sorption capacity, exchange kinetics, preconcentration factor, distribution coefficient, breakthrough capacity and resin stability, were optimized for effective separation and preconcentration. The resin showed good ability for the separation of metal ions from binary and ternary mixture on the basis of pH of absorption and concentration of eluting agents. The newly synthesized resins showed good potential for trace enrichment of Cu(II), Zn(II) and Cd(II) metal ions, especially for Cu(II), as compared to the earlier reported resins. The synthesized resins were recycled at least 8–10 times without much affecting column sorption capacity. The presented method was successfully applied for determination of Cu(II), Zn(II) and Cd(II) in natural and ground water samples.
Talanta, 2000
A stable chelating resin matrix was synthesized by covalently linking o-aminophenol (o-AP) with the benzene ring of the polystyrene-divinylbenzene resin, Amberlite XAD-2, through a -N N -group. Elemental analyses, thermogravimetric analysis (TGA) and infrared spectra have characterized the resulting chelating resin. It has been used to preconcentrate Cu 2 + , Cd 2 + , Co 2 + , Ni 2 + , Zn 2 + and Pb 2 + , prior to their determination by flame atomic absorption spectrometry. The optimum pH values for quantitative sorption of Cu, Cd, Co, Ni, Zn and Pb are 6.2-7.4, 5.6-7.2, 5.6-9.0, 6.0-9.0, 5.7-7.0 and 5.0 -6.0, respectively. These metals are desorbed (recovery 91 -98%) with 4 mol dm − 3 HNO 3 . The sorption capacity of the resin is 3.37, 3.42, 3.29, 3.24, 2.94 and 3.32 mg of metal g − 1 of resin, respectively, for Cu, Cd, Co, Ni, Zn and Pb. The effect of NaF, NaCl, NaNO 3 , Na 2 SO 4 , and Na 3 PO 4 on the sorption of these metal ions has been investigated. These electrolytes are tolerable up to 0.01 mol dm − 3 in case of all the metal ions, except Cl − which is tolerable even up to 0.1 mol dm − 3 for Zn and 1.0 mol dm − 3 for Pb. The preconcentration factor for Cu, Cd, Co, Ni, Zn and Pb are 50, 50, 100, 65, 40 and 40 (concentration level 10 -25 mg dm − 3 ) respectively. Simultaneous enrichment of the six metals is possible. The method has been applied to determine Cu, Cd, Co, Ni, Zn and Pb content in well water samples (RSD 58%).
Talanta, 2007
Amberlite XAD-16 resin has been functionalized using nitrosonaphthol as a ligand and characterized employing elemental, thermogravimetric analysis and FT-IR spectroscopy. The sorption of Ni(II) and Cu(II) ions onto this functionalized resin is investigated and optimized with respect to the sorptive medium (pH), shaking speed and equilibration time between liquid and solid phases. The monitoring of the influence of diverse ions on the sorption of metal ions has revealed that phosphate, bicarbonate and citrate reduce the sorption up to 10-14%. The sorption data followed Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms. The Freundlich parameters computed are 1/n = 0.56 ± 0.03 and 0.49 ± 0.05, A = 9.54 ± 1.5 and 6.0 ± 0.5 mmol g −1 for Ni(II) and Cu(II) ions, respectively. D-R isotherm yields the values of X m = 0.87 ± 0.07 and 0.35 ± 0.05 mmol g −1 and of E = 9.5 ± 0.23 and 12.3 ± 0.6 kJ mol −1 for Ni(II) and Cu(II) ions, respectively. Langmuir characteristic constants estimated are Q = 0.082 ± 0.005 and 0.063 ± 0.003 mmol g −1 , b = (4.7 ± 0.2) × 10 4 and (7.31 ± 0.11) × 10 4 l mol −1 for Ni(II) and Cu(II) ions, respectively. The variation of sorption with temperature gives thermodynamic quantities of H = −58.9 ± 0.12 and −40.38 ± 0.11 kJ mol −1 , S = −183 ± 10 and −130 ± 8 J mol −1 K −1 and G = −4.4 ± 0.09 and −2.06 ± 0.08 kJ mol −1 at 298 K for Ni(II) and Cu(II) ions, respectively. Using kinetic equations, values of intraparticle transport and of first order rate constant have been computed for both the metal ions. The sorption procedure is utilized to preconcentrate these ions prior to their determination in tea, vegetable oil, hydrogenated oil (ghee) and palm oil by atomic absorption spectrometry using direct and standard addition methods.
THE 9TH INTERNATIONAL CONFERENCE OF THE INDONESIAN CHEMICAL SOCIETY ICICS 2021: Toward a Meaningful Society
Today, Heavy metals are the incontrollable question of magnitude and ecological significance due to their high toxicity and ability to accumulate in living organisms. This study is likely to assess the pollution grade of the Cikapundung River in Bandung city and the extent to which river water is exposed to heavy metals hence, the safety levels of water users. This research aimed to synthesize and apply the adsorbent AXAD-16-DPC chelating resin to copper and lead-containing solution. To determine dissolved heavy metal (Cu and Pb ions) levels in the water Cikapundung River using laboratory instruments to pre-concentrate the sample using a solid-phase extraction method. Analysis of heavy metals in the water sample was carried out using flame atomic absorption spectrometry (FAAS) Solidphase extraction was used to pre-concentrate trace metal as it attains a high concentration factor, and potentially interfering matrices may be removed. The clear route is based on the retention of the targeted analytes on a mixed chelating organic ligand, 1,5-diphenyl carbazide (DPC) with polystyrene-divinyl benzene, a co-polymer Amberlite XAD-16 resin matrix placed inside cartridge column tube. The composite chelating resin was found to be successful as it can adsorb Cu (II) and Pb (II) ions with a high percentage of recovery around 101.20% for Pb (II) and 96% for Cu (II), and the reusability of resin is possible as RSD <5%. Fourier transform infrared (FTIR) spectroscopy was used to characterize the chelating resin, and 2 M Nitric acid was the best eluent. Moreover, water quality properties in terms of its physicochemical parameters assessed were Temperature (24.67 C), pH (7.66) of sample solution, Conductivity 259 ɱS/cm), Turbidity (130) and DO (3.80 mg/L).