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Removal of copper ions from aqueous solution by calcium alginate immobilized kaolin |
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| Authors: | Yanhui Li Bing Xi Quansheng Zhao Fuqiang Liu Pan Zhang Qiuju Du Dechang Wang Da Li Zonghua Wang and Yanzhi Xia |
| Institution: | 1. Laboratory of Fiber Materials and Modern Textile,The Growing Base for State Key Laboratory,Qingdao University,Qingdao 266071,China 2. Laboratory of Fiber Materials and Modern Textile,The Growing Base for State Key Laboratory,Qingdao University,Qingdao 266071,China;Department of Environmental Science and Engineering,Qingdao University,Qingdao 266071,China 3. Department of Environmental Science and Engineering,Qingdao University,Qingdao 266071,China |
| Abstract: | 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 e ects 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. |
| Keywords: | kaolin calcium alginate copper adsorption immobilization |
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