文献类型：期刊文献

英文题名：Efficient and selective removal of Pb(ii) from aqueous solution by a thioether-functionalized lignin-based magnetic adsorbent

作者：Zhou, Xuan[1,2] Liu, Yunlong[1] Jin, Can[1] Wu, Guomin[1] Liu, Guifeng[1] Kong, Zhenwu[1]

第一作者：Zhou, Xuan

通信作者：Jin, C[1];Kong, ZW[1]|[a00054cf775c70495421b]金灿;[a0005be4642aed69bf127]孔振武;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat,Key Lab Bioma, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Peoples R China

年份：2021

卷号：12

期号：2

起止页码：1130-1140

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000739500600001)】；

基金：We greatly acknowledge support from the National Key Research and Development Program of China (2017YFE0106800), Fundamental Research Funds of CAF (CAFYBB2019QB008), National Natural Science Foundation of China (31971615), and Fundamental Research Funds of Jiangsu Key Laboratory of Biomass Energy and Material (JSBEM-S-201806).

语种：英文

摘要：The effective and selective removal of heavy metal ions from sewage is a major challenge and is of great significance to the treatment and recovery of metal waste. Herein, a novel magnetic lignin-based adsorbent L@MNP was synthesized by a thiol-ene click reaction under ultraviolet (UV) light irradiation. Multiple characterization techniques, including Fourier transform infrared (FT-IR) spectrometry, X-ray diffraction (XRD), elemental analysis, vibrating sample magnetometry (VSM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), confirmed the formed nano-morphology and structure of L@MNP. The effects of pH, contact time, initial metal concentration and temperature on the batch adsorption of Pb(ii) by L@MNP were investigated. Due to the existence of sulfur and oxygen-containing sites, the maximum adsorption capacity of L@MNP for Pb(ii) could reach 97.38 mg g(-1), while the adsorption equilibrium was achieved within 30 min. The adsorption kinetics and isotherms were well described by the pseudo-second-order model and Langmuir model, respectively, suggesting a chemical and monolayer adsorption process. In addition, L@MNP showed a high adsorption selectivity (k(Pb) = 0.903) toward Pb(ii) in the presence of other co-existing metal ions. The experimental results also revealed that L@MNP displayed structural stability, ease of recovery under an external magnetic field, and acceptable recyclability after the fifth cycle. Considering its facile preparation, low cost and high adsorption efficiency, the developed L@MNP adsorbent demonstrated great potential in removing heavy metal ions from wastewater.