文献类型：期刊文献

英文题名：Catalytic Membrane for Groundwater Remediation of Chlorinated Organics: Nf-Assisted Strategy and Cost Aspects

作者：Wan, Hongyi[1,2]; Xu, Zhi[1]; Islam, Md. Saiful[2]; Tarannum, Tahiya[3]; Shi, Ke[1]; Mills, Rollie[2]; Yi, Zhiyuan[1]; Lei, Linfeng[1]; Li, Siyao[1]; Ormsbee, Lindell[3]; Bhattacharyya, Dibakar[2]

机构：[1] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, United States; [3] Department of Civil Engineering, University of Kentucky, Lexington, KY, 40506-0046, United States

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230033997)

语种：英文

外文关键词：Activated carbon - Cost estimating - Groundwater - Groundwater pollution - Iron - Iron alloys - Mass transfer - Palladium alloys - Reusability - Reynolds number

摘要：Nanocomposite membranes, with incorporated reactive Pd-Fe nanoparticles (NPs), were developed to remediate chlorinated organics from groundwater. The agglomeration tendency of magnetic NPs was controlled by the constrained membrane matrix and functionalized polyanions. With advanced characterization inside membrane pores, the individual NPs were characterized as the spherical Fe0 core (55 nm, O/Fe = 0.05) and oxidized shell (4 nm, O/Fe = 1.38). For groundwater remediation, 92% of target contaminants were degraded by catalytic membranes at a residence time of 1.7 s. The observed surface-area normalized dechlorination rate (ksa) was, however, 13-59% of that of the intrinsic ksa (derived from the batch dechlorination with individual compounds). This decrease could be attributed to both the mass transfer resistance inside membrane pores (low Reynolds number from 12-63) and the competitive dechlorination. With the integrated nanofiltration membranes, larger competitors were selectively removed, resulting in a 25% increase in dechlorination efficiency and 1.3 to 1.8-fold enlarged ksa. Aside from the long-term stability and reusability, the cost estimation was also conducted to demonstrate the practical implication, where the total cost (the adjusted present value for 20 years) was 13.9% lower than that of the granular activated carbon system. ? 2023, The Authors. All rights reserved.