Lead removal from water using organic acrylic amine fiber(AAF)and inorganic-organic P-AAF,fixed bed filtration and surface-induced precipitation  

作　　者：Jinshan Wei Lijie Duan Jian Wei Erhard Hoffmann Yonghui Song Xiaoguang Meng 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]Center for Environmental Systems,Stevens Institute of Technology,Hoboken,NJ 07030,USA [3]Department of Aquatic Environmental Engineering,Karlsruhe Institute of Technology,Karsruhe 76131,Germany [4]School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Environmental Sciences》2021年第3期135-144,共10页环境科学学报（英文版）

基　　金：supported by the Fundamental Research Funds for Central Public Welfare Scientific Research Institutes of China(No.2019-YSKY-009);the Major Science and Technology Projects for Water Pollution Control and Treatment(No.2017ZX07004)。

摘　　要：Granular porous sorbents were normally used for heavy metals removal from water.To search for the new commercial sorbent and treatment strategy,an organic acrylic amine fiber(AAF)and phosphorus loading inorganic-organic AAF(P-AAF)were prepared and used for lead(Pb)removal from water.A new strategy of inorganic-organic coupling technology was proposed for Pb removal,based on the hypothesis of surface-induced precipitation mechanism.The AAF showed a Pb adsorption capacity of 417 mg/g from the Langmuir fitting,while the column filtration technology was further applied to measure the adsorption edge and applications.Effects of different initial Pb concentrations,hydraulic retention time,and co-existing P were considered in the filtration experiments.The presence of 0.8 mg/L P in water significantly improved the Pb breakthrough point from 15,000 to 41,000 bed volumes of water spiked with 85μg/L Pb,while the P-AAF fixed bed showed better removal of Pb than AAF SEM/EDX and XRD spectra were employed for determining the surface functional groups and the formation of surface-induced precipitation of pyromorphite(Pb_5(PO_4)_3 OH)on AAF.This study verified the application of AAF sorbent for Pb removal and the enhanced effect of coating P on AAF,thus improved our fundamental understanding and application of the surface chemistry process of Pb with P.

关 键 词：Lead removal Adsorption Fixed bed filtration Acrylic amine fiber Inorganic-organic sorbent Surface-induced precipitation 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]