文献类型：期刊文献

英文题名：Highly efficient Pb(Ⅱ) and Hg(Ⅱ) removal using coal gasification fine slag based functionalized porous silica

作者：Ren, Liang[1]; Gong, Yan[1]; Wu, Ruofei[1]; Guo, Qinghua[1,2]; Yu, Guangsuo[1,2]; Wang, Fuchen[1,2]

机构：[1] Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, 200237, China; [2] State Key Laboratory of Coal Liquification, Gasification and Utilization with High Efficiency and Low Carbon Technology, Shanghai, 200237, China

年份：2025

卷号：369

外文期刊名：Separation and Purification Technology

收录：EI(收录号：20251718287448)

语种：英文

外文关键词：Gas adsorption - Grafting (chemical) - Slags - Surface reactions

摘要：Coal gasification fine slag (CGFS) is a solid waste in the coal conversion process. In this study, CGFS-based functionalized porous silica (PS) adsorbents were synthesized. The amino ([sbnd]NH2) and thiol groups ([sbnd]SH) are successfully grafted onto the functionalized PS surface, and the grafting ability of PS to [sbnd]NH2 is better than that of [sbnd]SH. The addition of 2 % APTES and 2 % MPTMS during the functionalization process can promote [sbnd]NH2-functionalized PS and [sbnd]SH-functionalized PS to present efficient removal of Pb(Ⅱ) and Hg(Ⅱ). The removal efficiency of the two adsorbents at low dosages for Pb(Ⅱ) and Hg(Ⅱ) are more than 98 %, and show good cyclic stability. The results of adsorption kinetics, isothermal adsorption and adsorbent characterizations show that Pb(Ⅱ) and Hg(Ⅱ) are effectively captured on PS-N and PS-S surfaces through the interaction of complexation reaction, electrostatic attraction and surface physical adsorption, and the complexation reaction is the main reason. ? 2025 Elsevier B.V.