文献类型：期刊文献

英文题名：Adsorption Equilibrium and Kinetics of Pb(II) from Aqueous Solution by Modified Walnut Shell

作者：Cheng, Liping[1];Sun, Li[1];Xue, Weilan[1];Zeng, Zuoxiang[1];Li, Shenmaishang[1]

机构：[1]East China Univ Sci & Technol, Inst Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：35

期号：6

起止页码：1724

外文期刊名：ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY

收录：;EI(收录号：20164703028205);WOS:【SCI-EXPANDED(收录号:WOS:000393419700023)】；

语种：英文

外文关键词：adsorption; lead ions; walnut shell; acrylic acid modification; regeneration

摘要：The adsorption equilibrium and kinetics of the removal of Pb(II) from aqueous solution by walnut shell modified with acrylic acid (MWNS) were investigated in the temperature range of 288-308 K. Thus, the samples of MWNS with different graft yields (3.65, 10.45, 18.49, and 19.66 wt %) were prepared by reacting walnut shell (WNS) with acrylic acid. The effects of graft yield, adsorbent dose, pH, contact time, and temperature on the adsorption of Pb(II) were studied. Both WNS and MWNS-4 (19.66 wt %) were characterized by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) analyses. Adsorption kinetics were examined using pseudo-first-order, pseudo-second-order model, Elovich kinetic model, intraparticle diffusion model, and Boyd kinetic model. The adsorption isotherm data were better interpreted by Langmuir isotherm model, and the maximum adsorption capacity for Pb(II) was 210.14 mg g(-1) at 308 K. The energy disperse spectroscopy (EDS) analysis was applied to verify the adsorption process. The thermodynamic parameters Delta G, Delta H, and Delta S were determined. Recycling property of MWNS-4 was studied. (C) 2016 American Institute of Chemical Engineers Environ Prog, 35: 1724-1731, 2016