钠化改性膨润土对Cd2+的吸附研究
STUDY ON ADSORPTION OF Cd2+ WITH Na-MODIFIED BENTONITE
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摘要: 通过等温吸附试验,研究了钙基膨润土及钠化改性膨润土对Cd2+的吸附,并与土壤对Cd2+的吸附进行了对比.试验表明,钠化改性膨润土对Cd2+有很好的吸附作用,可用于重金属污染土壤的治理.pH值是影响吸附效果的一个重要因素.Abstract: The adsortion of cadmium ions in Ca-bentonite and Na-modified bentonite was studied by isothermal adsorption method.Those results were compared with the adsorption of cadmium ions in soil,and shown that Na-modified bentonite has a high affinity for cadmium ions,it can be used to remedy heavy metal contaminated soils.pH value is an important factor to for affecting adsorption.
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Key words:
- Na-modified bentonite /
- heavy metal /
- adsorption /
- contaminated soils
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