期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 23, 期 3, 页码 404-411出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(10)60442-1
关键词
kaolin; calcium alginate; copper; adsorption; immobilization
资金
- National Natural Science Foundation of China [50802045, 20975056/B050902]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Middle-aged and Youth Scientist Incentive Foundation of Shandong Province [BS09018]
Kaolin has been widely used as an adsorbent to remove heavy metal ions from aqueous solutions. However, the lower heavy metal adsorption capacity of kaolin limits its practical application. A novel environmental friendly material, calcium alginate immobilized kaolin (kaolin/CA), was prepared using a sol-gel method. The effects of contact time, pH, adsorbent dose, and temperature on Cu2+ adsorption by kaolin/CA were investigated. The Langmuir isotherm was used to describe the experimental adsorption, the maximum Cu2+ adsorption capacity of the kaolin/CA reached up to 53.63 mg/g. The thermodynamic studies showed that the adsorption reaction was a spontaneous and endothermic process.
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