PMID: 11900915Mar 20, 2002Paper

An investigation into the sorption of heavy metals from wastewaters by polyacrylamide-grafted iron(III) oxide

Journal of Hazardous Materials
G N ManjuT S Anirudhan

Abstract

An adsorbent for heavy metals was synthesized by introducing carboxylate functional group into polyacrylamide-grafted hydrous iron(III) oxide. The product exhibits a very high adsorption potential for Pb(II), Hg(II) and Cd(II). The removal of metal ions by adsorption on adsorbent has been found to be contact time, concentration, pH and temperature dependent. The process follows first-order reversible kinetics. The intraparticle diffusion of metal ions through pores in the adsorbent was shown to be the main rate-limiting step. The optimum pH range for the removal of metal ions was found to be 5.0-6.0. The thermodynamic parameters such as free energy change, enthalpy change and entropy change have been calculated to predict the nature of adsorption. The adsorption data were fitted using the Langmuir equation and maximum adsorption for each metal was estimated using their respective Langmuir equation constants. The method was applied for synthetic wastewaters. NaCl regeneration has been tried for several cycles with a view to recover the adsorbed metal ions and also to restore the sorbent to its original state.

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Citations

Aug 26, 2003·Journal of Hazardous Materials·Gülay BayramoğluM Yakup Arica
Oct 25, 2011·Journal of Hazardous Materials·Ming HuaQuanxing Zhang
Jun 28, 2011·Journal of Hazardous Materials·Elizabeth RamírezBryan Bilyeu
May 26, 2009·Journal of Hazardous Materials·K Jayaram, M N V Prasad
May 23, 2008·Bioresource Technology·Mehmet Emin ArgunMetin Gürü
Feb 5, 2008·Journal of Hazardous Materials·Yuh-Shan Ho, Chung-Chi Wang
Jun 5, 2004·Journal of Colloid and Interface Science·F A PavanC Airoldi
Oct 20, 2009·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Turgut T OnayAsiye Bacioglu
Nov 20, 2014·Physical Chemistry Chemical Physics : PCCP·Wencheng SongXiangke Wang
Mar 24, 2006·Chemistry : a European Journal·Mei-Rong HuangXin-Gui Li
Mar 16, 2019·Nanomaterials·Jinyue YangXin Huang
Mar 19, 2019·Chemosphere·Faraz Khan MaharIcksoo Kim
May 2, 2021·Journal of Hazardous Materials·Fahad Saleem Ahmed KhanShaukat Ali Mazari
Oct 1, 2013·International Journal of Biological Macromolecules·H MittalAjay K Mishra
Sep 15, 2004·Journal of Hazardous Materials·Krishna G Bhattacharyya, Arunima Sharma
Jun 24, 2004·Environmental Science & Technology·Kirk G ScheckelJames A Ryan
Jun 17, 2020·Environmental Science & Technology·John BrockgreitensAbdennour Abbas
Jan 29, 2011·Advances in Colloid and Interface Science·Susmita Sen Gupta, Krishna G Bhattacharyya

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