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Mercury(II) removal from aqueous solutions and wastewaters using a novel cation exchanger derived from coconut coir pith and its recovery.
J Hazard Mater. 2008 Sep 15; 157(2-3):620-7.JH

Abstract

A new adsorbent (PGCP-COOH) having carboxylate functional group at the chain end was synthesized by grafting poly(hydroxyethylmethacrylate) onto coconut coir pith, CP (a coir industry-based lignocellulosic residue), using potassium peroxydisulphate as an initiator and in the presence of N,N'-methylenebisacrylamide as a cross-linking agent. The adsorbent was characterized with the help of infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and potentiometric titrations. The ability of PGCP-COOH to remove Hg(II) from aqueous solutions was assessed using batch adsorption technique under kinetic and equilibrium conditions. Adsorbent exhibits very high adsorption potential for Hg(II) and more than 99.0% removal was achieved in the pH range 5.5-8.0. Adsorption process was found to follow first-order-reversible kinetics. An increase of ionic strength of the medium caused a decrease in metal removal, indicating the occurrence of outer-sphere surface complex mechanism. The equilibrium data were fitted well by the Freundlich isotherm model (R(2)=0.99; chi(2)=1.81). The removal efficiency was tested using chlor-alkali industry wastewater. Adsorption isotherm experiments were also conducted for comparison using a commercial carboxylate-functionalized ion exchanger, Ceralite IRC-50. Regeneration experiments were tried for four cycles and results indicate a capacity loss of <9.0%.

Authors+Show Affiliations

Department of Chemistry, University of Kerala, Kariavattom, Trivandrum, India. tsani@rediffmail.com <tsani@rediffmail.com>No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18313209

Citation

Anirudhan, T S., et al. "Mercury(II) Removal From Aqueous Solutions and Wastewaters Using a Novel Cation Exchanger Derived From Coconut Coir Pith and Its Recovery." Journal of Hazardous Materials, vol. 157, no. 2-3, 2008, pp. 620-7.
Anirudhan TS, Divya L, Ramachandran M. Mercury(II) removal from aqueous solutions and wastewaters using a novel cation exchanger derived from coconut coir pith and its recovery. J Hazard Mater. 2008;157(2-3):620-7.
Anirudhan, T. S., Divya, L., & Ramachandran, M. (2008). Mercury(II) removal from aqueous solutions and wastewaters using a novel cation exchanger derived from coconut coir pith and its recovery. Journal of Hazardous Materials, 157(2-3), 620-7. https://doi.org/10.1016/j.jhazmat.2008.01.030
Anirudhan TS, Divya L, Ramachandran M. Mercury(II) Removal From Aqueous Solutions and Wastewaters Using a Novel Cation Exchanger Derived From Coconut Coir Pith and Its Recovery. J Hazard Mater. 2008 Sep 15;157(2-3):620-7. PubMed PMID: 18313209.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mercury(II) removal from aqueous solutions and wastewaters using a novel cation exchanger derived from coconut coir pith and its recovery. AU - Anirudhan,T S, AU - Divya,L, AU - Ramachandran,M, Y1 - 2008/01/19/ PY - 2007/03/11/received PY - 2008/01/14/revised PY - 2008/01/14/accepted PY - 2008/3/4/pubmed PY - 2009/1/8/medline PY - 2008/3/4/entrez SP - 620 EP - 7 JF - Journal of hazardous materials JO - J Hazard Mater VL - 157 IS - 2-3 N2 - A new adsorbent (PGCP-COOH) having carboxylate functional group at the chain end was synthesized by grafting poly(hydroxyethylmethacrylate) onto coconut coir pith, CP (a coir industry-based lignocellulosic residue), using potassium peroxydisulphate as an initiator and in the presence of N,N'-methylenebisacrylamide as a cross-linking agent. The adsorbent was characterized with the help of infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and potentiometric titrations. The ability of PGCP-COOH to remove Hg(II) from aqueous solutions was assessed using batch adsorption technique under kinetic and equilibrium conditions. Adsorbent exhibits very high adsorption potential for Hg(II) and more than 99.0% removal was achieved in the pH range 5.5-8.0. Adsorption process was found to follow first-order-reversible kinetics. An increase of ionic strength of the medium caused a decrease in metal removal, indicating the occurrence of outer-sphere surface complex mechanism. The equilibrium data were fitted well by the Freundlich isotherm model (R(2)=0.99; chi(2)=1.81). The removal efficiency was tested using chlor-alkali industry wastewater. Adsorption isotherm experiments were also conducted for comparison using a commercial carboxylate-functionalized ion exchanger, Ceralite IRC-50. Regeneration experiments were tried for four cycles and results indicate a capacity loss of <9.0%. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18313209/Mercury_II__removal_from_aqueous_solutions_and_wastewaters_using_a_novel_cation_exchanger_derived_from_coconut_coir_pith_and_its_recovery_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(08)00092-7 DB - PRIME DP - Unbound Medicine ER -