文献类型：期刊文献

英文题名：Reactive membranes for groundwater remediation of chlorinated aliphatic hydrocarbons: Competitive dechlorination and cost aspects

作者：Wan, Hongyi[1,2];Islam, Md. Saiful[2];Tarannum, Tahiya[3];Shi, Ke[1];Mills, Rollie[2];Yi, Zhiyuan[1];Fang, Fumohan[1];Lei, Linfeng[1];Li, Siyao[1];Ormsbee, Lindell[3];Xu, Zhi[1,4];Bhattacharyya, Dibakar[2,5]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA;[3]Univ Kentucky, Dept Civil Engn, Lexington, KY 40506 USA;[4]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]Univ Kentucky, 177 F Paul Anderson Tower, Lexington, KY 40506 USA

年份：2023

卷号：320

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20232214150777);WOS:【SCI-EXPANDED(收录号:WOS:001012436200001)】；

基金：This work was supported by the NIEHS-SRP grant [P42ES007380]; the China Postdoctoral Science Foundation [2020M681204]; and the National Natural Science Foundation of China [22208097 & 22075076].

语种：英文

外文关键词：Reactive membrane; Focused ion beam; Zero-valent iron; Competitive dechlorination; Cost estimation

摘要：A nanocomposite membrane incorporating reactive Pd-Fe nanoparticles (NPs) was developed to remediate chlorinated aliphatic hydrocarbons (CAHs) from groundwater. Other than recapturing the produced Fen+ for in -situ regeneration, the functionalized polyanions prevented NPs agglomeration and resulting in a spherical Fe0 core (55 nm, O/Fe = 0.05) and an oxidized shell (4 nm, O/Fe = 1.38). The reactive membranes degraded 92% of target CAHs with a residence time of 1.7 s. After long-term treatment and regeneration, reusability was confirmed through recovered reactivity, recurrence of Fe0 in X-ray photoelectron spectroscopy, and >96% remaining of Fe and Pd. The total cost (adjusted present value for 20 years) was estimated to be 13.9% lower than the granular activated carbon system, following an EPA work breakdown structure-based cost model. However, non-target CAHs from groundwater can compete for active sites, leading to decreased surface-area normalized dechlorination rate (ksa) by 28.2-79.9%. A hybrid nanofiltration (NF)/reactive membrane was proposed to selectively intercept larger competitors, leading to 54% increased dechlorination efficiency and 1.3 to 1.9-fold enlarged ksa. Overall, the practical viability of the developed reactive membranes was demonstrated by the stability, reusability, and cost advantages, while the optional NF strategy could alleviate competitive degradation towards complex water chemistry.