摘要
合成了一种新材料聚丙烯酸-b-聚苯乙烯包埋纳米Fe/Ni颗粒(PAA-b-PS-Fe/Ni),并对1,1,1-三氯乙烷(1,1,1-TCA)的选择性脱氯效果进行了评价。由于PAA-b-PS可以防止零价铁团聚,PAA-b-PS包埋纳米Fe/Ni双金属颗粒的平均尺寸约为50 nm。在1.0 g/L Fe/Ni(Ni/Fe质量比为2%)和0.5 g/L PAA-b-PS的包埋质量浓度下,脱氯反应在240 min后达到平衡,并对200 mg/L的1,1,1-TCA的去除效率最佳(87.5%)。PAA-b-PS-Fe/Ni对1,1,1-TCA的去除效率与无机阴离子(NO3-、HCO3-和SO42-)无关,去除效率均约为88%。然而,腐植酸对1,1,1-TCA的降解有很大影响。总之,PAA-b-PS包埋纳米Fe/Ni颗粒具有选择性,并且对于降解地下水中1,1,1-TCA非常有效。
Polyacrylic acid-b-polystyrene covered Fe/Ni nanoparticles(PAA-b-PS-Fe/Ni),a new material,is developed and evaluated for the selective dechlorination of 1,1,1-trichloroethane(1,1,1-TCA)in the presence of potential interferents.The sizes of PAA-b-PS coated Fe/Ni bimetallic nanoparticles are averaged approximately at 50 nm because PAA-b-PS can prevent zero-valent iron from agglomeration.The dechlorination reaction reaches balance within 240 min while the removal rate of 200 mg·L^-,1,1,1-TCA achieves the best,87.5% under a 1.0 g·L^-1 Fe/Ni(Ni/Fe=2%)and 0.5 g L^-1 PAA-b-PS-coated concentration.The removal efficiency of 1,1,1-TCA by PAA-b-PS-Fe/Ni is averaged at around 88%,regardless of various common inorganic anions(NO3-,HCO3- and SO4^2- )at different concentrations.However,humic acid has a great influence on the degradation of 1,1,1-TCA.In conclusion,PAA-b-PScovered Fe/Ni nanoparticles have selectivity and are highly effective for the degradation of 1,1,1-TCA from groundwater.
作者
詹聪
林匡飞
陆强
李灿
刘馥雯
黄凯
ZHAN Cong;LIN Kuang-fei;LU Qiang;LI Can;LIU Fu-wert;HUANG Kai(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China)
出处
《现代化工》
CAS
CSCD
北大核心
2019年第11期84-88,共5页
Modern Chemical Industry
基金
国家自然科学基金项目(51708223,41301329)
上海市科学技术委员会资助项目(17DZ1202304)。