有机-类水滑石对Cu(Ⅱ)和对甲酚复合污染的吸附  

Adsorption behavior in dual-solutes of Cu(Ⅱ) and p-cresol by organo-HTlc nanohybrids

作　　者：李燕[1] 臧运波[2] 李龙龙[1] 

机构地区：[1]长治学院化学系,长治046011 [2]商丘师范学院化学化工学院,商丘476000

出　　处：《环境化学》2013年第12期2290-2296,共7页Environmental Chemistry

基　　金：国家自然科学基金(50772062);山西省自然科学基金(2013011040-8);山西省高校科技开发(20091038)项目资助

摘　　要：以Cu(Ⅱ)、对甲酚为代表污染物,用实验室模拟法分别研究了十二烷基硫酸根和十二烷基苯磺酸根插层类水滑石(有机-类水滑石纳米杂化物)在重金属-有机物混合污染体系中的吸附行为.结果表明:(1)十二烷基苯磺酸根插层类水滑石对对甲酚的吸附速率和吸附量均大于十二烷基硫酸根插层类水滑石;(2)在有机-类水滑石/Cu(Ⅱ)/对甲酚体系中,溶液中共存的Cu(Ⅱ)会降低有机-类水滑石对对甲酚的吸附速率及减少吸附量;(3)有机-类水滑石对对甲酚的吸附量随体系pH的降低和电解质NaCl浓度的增加而增加.Organo-hydrotalcite-like compound （HTlc） nanohybrids, dodecylsufate （DS-） and dodecylbenzene sulfonate（ DBS- ） ion-intercalated Mg-Al HTlcs, were prepared by the structure reconstruction method. The adsorption behavior of organo-HTlcs for p-cresol from Cu（ II ）/p-cresol mixture was investigated. The results suggests that （ 1 ） the adsorption rate and capacity of DBS- ion-intercalated HTlc is larger than those of DS - ion-intercalated HTlc forp-cresol; （2） in organo-HTlc/Cu（ 1I ）/p-cresol solute systems, Cu（ 11 ） reduced the adsorption rate and capacity of organo-HTlc for p-cresol from water. Cu（ I1 ） and p-cresol exhibited a competitive effect. The competitive effect was related to the adsorption mechanism of organo-HTlc. The adsorption capacity of organo-HTlc nanohybrids for p-cresol was increased by lowering the pH value and the addition of NaCl.

关 键 词：有机-类水滑石纳米杂化物 Cu(Ⅱ) 对甲酚 吸附 

分 类 号：X703[环境科学与工程—环境工程]