Adsorptive Removal of Copper and Nickel Ions from Water Using Chitosan Coated PVC Beads

Department of Chemistry, Biopolymers and Thermophysical Laboratory, Sri Venkateswara University, Tirupati, Andra Pradesh, India.
Bioresource Technology (Impact Factor: 4.49). 08/2008; 100(1):194-9. DOI: 10.1016/j.biortech.2008.05.041
Source: PubMed


A new biosorbent was developed by coating chitosan, a naturally and abundantly available biopolymer, on to polyvinyl chloride (PVC) beads. The biosorbent was characterized by FTIR spectra, porosity and surface area analyses. Equilibrium and column flow adsorption characteristics of copper(II) and nickel(II) ions on the biosorbent were studied. The effect of pH, agitation time, concentration of adsorbate and amount of adsorbent on the extent of adsorption was investigated. The experimental data were fitted to Langmuir and Freundlich adsorption isotherms. The data were analyzed on the basis of Lagergren pseudo first order, pseudo-second order and Weber-Morris intraparticle diffusion models. The maximum monolayer adsorption capacity of chitosan coated PVC sorbent as obtained from Langmuir adsorption isotherm was found to be 87.9 mg g(-1) for Cu(II) and 120.5 mg g(-1) for Ni(II) ions, respectively. In addition, breakthrough curves were obtained from column flow experiments. The experimental results demonstrated that chitosan coated PVC beads could be used for the removal of Cu(II) and Ni(II) ions from aqueous medium through adsorption.

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    • "Previous studies were made on chitosan support material, which includes sand [14], bentonite [19] [20] [21], PVC [6], and perlite [22]. Montmorillonite, a smectite clay mineral composed of three layers, has a 2:1 ratio of Si 4+ tetrahedral to Al 3+ octahedral sheets. "
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    ABSTRACT: In this study, the removal of Cu(II), Ni(II), Pb(II), and Zn(II) from aqueous solution in single and multi-metal system using chitosan-coated montmorillonite (ChiMC) beads was investigated. The non-crosslinked and crosslinked ChiMC beads were characterized using SEM-EDX, Fourier transform infrared, and Brunauer, Emmett, and Teller analysis. The effect of ionic strength and pH on the adsorption capacity and percent (%) removal of ChiMC was examined. Kinetic studies revealed that adsorption using ChiMC follows the pseudo-second-order equation with high correlation coefficient values (R2 > 0.95). The equilibrium data were correlated with Langmuir and Freundlich isotherm models, where crosslinked ChiMC provided higher maximum adsorption capacity over ChiMC. The calculated Langmuir adsorption capacities for Cu(II), Ni(II), Pb(II), and Zn(II) using ChiMC in single-metal system are 13.04, 12.18, 29.85, and 13.50 mg/g, respectively. An increase in the calculated adsorption capacities derived from Langmuir isotherm was observed in multi-metal system, indicating a synergistic effect. The adsorption capacity in single- and multi-metal system followed the order: Pb(II) > Cu(II) > Zn(II) > Ni(II). The kinetic rate and adsorption capacity of the four metals were observed to increase in multi-metal systems. The removal of Cu(II), Ni(II), Pb(II), and Zn(II) from groundwater by adsorption onto ChiMC was also investigated.
    Desalination and water treatment 04/2015; DOI:10.1080/19443994.2015.1035676 · 1.17 Impact Factor
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    • "These conditions highly affect the selection of the treatment process to be used for the removal of nickel from waste water (Popuri et al. 2009). Traditional processes usually utilized for nickel removal from waste waters are adsorption (Vieria et al. 2010; Popuri et al. 2009; Kandah and Meunier 2007; Li and Champagne 2009; Aguilar-Gonzalez et al. 2010; Ewecharoen et al. 2008), bio-sorption (Ozturk 2007; Bhatnagar and Minocha 2010), precipitation (Forstner and Wittman 1979), electrochemical methods (Dermentzis 2010; Akbal and Camci 2011; Kabadasli et al. 2009; Pospisil et al. 2008; Njau et al. 2000), filtration (Katsou et al. 2010; Borbely and Nagy 2009; Karate and Marathe 2008; Channarong et al. 2010), electroflocculation-filtration hybrid system (Sun et al. 2009), liquid–liquid extraction (Gonzalez et al. 2010) and ion exchange (Rengaraj et al. 2001; Alyuz and Veli 2009; Halle et al. 1982). In fact, ion exchange is a well-known technology that we have utilized in several difficult separation tasks up to isotope separation (Ismail et al. 1997a, 1997b, 2002, 2001; Fujii et al. 1998; Nogami et al. 2001). "
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    ABSTRACT: Wastewater discharged from metal-finishing processes usually contains nickel, a hazardous substance that is used extensively in the surface finishing industry. In the present study, an acidic solution containing nickel was treated using strong acid cation exchange resin. A continuous lab-scale cation exchange arrangement permitting the assessment of electric current as an enhancement mechanism was designed and utilized at different flow rates successfully. Applying the electrical potential enhanced the nickel removal by 12.7 % at flow rate 240 ml/h, and 2.5 % at flow rate 500 ml/h. Nickel recovery has been also investigated using hydrochloric acid as an eluent with and without electric current enhancement.
    International journal of Environmental Science and Technology 02/2014; 11(1). DOI:10.1007/s13762-012-0158-z · 2.19 Impact Factor
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    • "More common methods namely chemical precipitation, coagulation, reverse osmosis, ion exchange, membrane filtration, oxidation, air stripping , and adsorption have been adopted in various wastewater treatments [2] [6] [7]. Nonetheless, of these numerous cleanup techniques, adsorption techniques become prominent as a more superior and promising technique due to the fact that they require low energy, the design is simple and that they are very effective in treating effluents, either with high solute loadings or dilute concentrations [3] [8]. Heavy metal adsorption using conventional adsorbents such as commercialized activated carbon has been very popularly used in many applications as an effective adsorbent. "
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    ABSTRACT: The highlight of this study is the adsorption properties and characterization of palm oil boiler mill fly ash (POFA) as a natural low-cost adsorbent for the removal of Cd(II) from aqueous solution. An array of batch adsorption studies has been done with the effects demonstrated by relevant parameters such as contact times, solution pH, adsorbent dosage, and initial Cd(II) concentration to investigate POFA performance. Energy-dispersive X-ray (EDX) analysis has shown that the structural surface of POFA containing porous carbon and revealing ion exchange may serve as one of the major mechanisms accountable for Cd(II) adsorption onto POFA. Fundamental batch investigations have implied that 80% of Cd(II) was removed in the first 30 min reaching equilibration, after only going through the process of agitation for 210 min. The Cd(II) uptake mechanism is specifically pH and concentration dependant with pH 7 being the optimum reading. A decreased adsorption capacity with an increased Cd(II) removal efficiency was obtained as the adsorbent dose increased. The experimental data adhered to the pseudo-second-order kinetics, which further confirms chemisorptions. The adsorption behavior of Cd(II) fits appropriately and accurately with the Langmuir isotherm model with maximum monolayer adsorption capacity of 15.82 mg/g. Therefore, it is illustrated by this study that POFA could be used effectively as a natural low-cost adsorbent for Cd(II) removal from aqueous solutions.
    Desalination and water treatment 01/2014; 54(7):1-13. DOI:10.1080/19443994.2014.891466 · 1.17 Impact Factor
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