典型文献
Cadmium removal mechanistic comparison of three Fe-based nanomaterials:Water-chemistry and roles of Fe dissolution
文献摘要：
Cadmium(Cd)is a common toxic heavy metal in the environment.Taking Cd(II)as a target contaminant,we systematically compared the performances of three Fe-based nanomaterials(nano zero valent iron,nZVI;sulfidated nZVI,S-nZVI;and nano FeS,nFeS)for Cd immobilization under anaerobic conditions.Effects of nanomaterials doses,initial pH,co-existing ions,and humic acid(HA)were examined.Under identical conditions,at varied doses or initial pH,Cd(Ⅱ)removal by three materials followed the order of S-nZVI＞nFeS＞nZVI.At pH 6,the Cd(II)removal within 24 hours for S-nZVI,nFeS,and nZVI(dose of 20 mg/L)were 93.50％,89.12％and 4.10％,respectively.The fast initial reaction rate of nZVI did not lead to a high removal capacity.The Cd removal was slightly impacted or even improved with co-existing ions(at 50 mg/L or 200 mg/L)or HA(at 2 mg/L or 20 mg/L).Characterization results revealed that nZVI immobilized Cd through coprecipitation,surface complexation,and reduction,whereas the mechanisms for sulfidated materials involved replacement,coprecipitation,and surface complexation,with replacement as the predominant reaction.A strong linear correlation between Cd(Ⅱ)removal and Fe(Ⅱ)dissolution was observed,and we proposed a novel pseudo-second-order kinetic model to simulate Fe(Ⅱ)dissolution.
文献关键词：
中图分类号：
作者姓名：
Xiaoge Huang;Lihao Chen;Ziqi Ma;Kenneth C.Carroll;Xiao Zhao;Zailin Huo
作者机构：
College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China;Plant&Environmental Science Department,New Mexico State University,Las Cruces,NM 88003,USA
文献出处：
引用格式：
[1]Xiaoge Huang;Lihao Chen;Ziqi Ma;Kenneth C.Carroll;Xiao Zhao;Zailin Huo-.Cadmium removal mechanistic comparison of three Fe-based nanomaterials:Water-chemistry and roles of Fe dissolution)[J].环境科学与工程前沿,2022(12):15-29
A类：
sulfidated,nFeS
B类：
Cadmium,removal,mechanistic,comparison,three,nanomaterials,Water,chemistry,roles,dissolution,Cd,common,toxic,heavy,metal,environment,Taking,II,target,contaminant,systematically,compared,performances,zero,valent,nZVI,immobilization,under,anaerobic,conditions,Effects,doses,initial,existing,humic,acid,HA,were,examined,Under,identical,varied,by,followed,order,At,within,hours,respectively,fast,reaction,rate,did,not,lead,high,capacity,was,slightly,impacted,even,improved,Characterization,results,revealed,that,immobilized,through,coprecipitation,surface,complexation,reduction,whereas,mechanisms,involved,replacement,predominant,strong,linear,correlation,between,observed,proposed,novel,pseudo,second,kinetic,model,simulate
AB值：
0.480456
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
