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Dodecyl sulfate chain‐anchored mercerized lignocellulose agro‐waste: An effective and sustainable adsorbent to sequester heavy metal ions from an aqueous phase
Author(s) -
Ali Khan Moonis,
Ali Mohd Sajid,
Abdullah Alothman Zeid,
Siddiqui Masoom Raza,
AlLohedan Hamad A.
Publication year - 2017
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12625
Subject(s) - adsorption , metal ions in aqueous solution , aqueous solution , chemistry , metal , freundlich equation , endothermic process , sulfate , aqueous two phase system , cationic polymerization , nuclear chemistry , inorganic chemistry , organic chemistry
Herein, dodecyl sulfate chain‐anchored mercerized lignocellulosic (SMPS) agro‐waste biomass was developed through hydrophobic interaction to enhance negatively charged surface sites concentration, consequently increasing SMPS potential to adsorb highly toxic cationic heavy metal ions viz. Pb(II), Cd(II), and Zn(II) from an aqueous phase. Spectrophotometric and elemental analyses confirmed successful modification and heavy metal ions adsorption over mesoporous SMPS surface. Experimental parameters viz. pH, concentration, temperature, and adsorbent dose have a profound influence on heavy metal ions adsorption. Lead [Pb(II)] had the lowest hydrolyzing tendency and the strongest binding potential among the studied metals; therefore, it showed the highest adsorption, followed by Cd(II) and Zn(II). Extremely rapid adsorption kinetics was observed, accomplishing 90–97% heavy metal ions adsorption within 15 min. Isotherm and kinetics studies showed Freundlich and pseudo‐second‐order models applicability, respectively. The process was endothermic and spontaneous. Breakthrough capacities for Pb(II), Cd(II), and Zn(II) were 0.01, 0.05, and 0.05 mmol/g, respectively. The maximum amounts of metal ions were eluted with acids. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1676–1684, 2017