摘要
对4种代表性重金属离子在腐植酸上吸附、pH对竞争吸附的影响及其吸附机理进行了研究。结果表明，Cu2＋、Pb2＋、Zn2＋的吸附等温线为F型，而Cd2＋等温线为L型；2．5＜pH＜3．5时，竞争吸咐次序为Cu2＋＞Pb2＋＞Cd2＋＞Zn2＋；pH＞5．0时，Cd2＋＞Cu2＋＞Zn2＋＞Pb2＋；Cu2＋在腐植酸上的吸附主要是以与腐植酸形成配合物的方式相互结合。
The adsorption characteristics of four typical heavy metal ions on humic acids was studied.The results showed that the isotherms were of F type Cu2+, Pb2+, Zn2+, L type for Cd2+. The competitive adsorption series are Cu2+ >Pb2+ >Cd2+ >Zn2+at 2. 5<pH< 3. 5, Cd2+ >Cu2+ >Zn2+>Pb2+ at pH>5. 0 and the mechanism of Cu2+ adsorbed by humic acids was to form compound.
出处
《环境污染与防治》
CAS
CSSCI
CSCD
北大核心
1997年第1期9-11,共3页
Environmental Pollution & Control
基金
国家自然科学基金
关键词
重金属离子
吸附
腐植酸
配合物
Heavy metal Adsorption Humic acid Competitive adsorption
