Dodecyl sulfate chain‐anchored mercerized lignocellulose agro‐waste: An effective and sustainable adsorbent to sequester heavy metal ions from an aqueous phase. Issue 6 (16th April 2017)

• Record Type: Journal Article
• Authors: Ali Khan, Moonis; Ali, Mohd Sajid; Abdullah Alothman, Zeid; Siddiqui, Masoom Raza; Al‐Lohedan, Hamad A.
• Is Part Of: Environmental progress & sustainable energy. Volume 36:Issue 6(2017)
• Page Start: 1676
• Page End: 1684
• Publication Date: 2017-04-16
• Subjects: sodium dodecyl sulfate -- heavy metals -- mercerized agro‐waste -- adsorption -- desorption; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.12625
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract : 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