title: Removal of copper ions from aqueous solution by calcium alginate immobilized kaolin.
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 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.
authors.affiliation: Laboratory of Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China. liyanhui@tsinghua.org.cn
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Li
authors.forename: Bing
authors.initials: B
authors.lastname: Xia
authors.forename: Quansheng
authors.initials: Q
authors.lastname: Zhao
authors.forename: Fuqiang
authors.initials: F
authors.lastname: Liu
authors.forename: Pan
authors.initials: P
authors.lastname: Zhang
authors.forename: Qiuju
authors.initials: Q
authors.lastname: Du
authors.forename: Dechang
authors.initials: D
authors.lastname: Wang
authors.forename: Da
authors.initials: D
authors.lastname: Li
authors.forename: Zonghua
authors.initials: Z
authors.lastname: Wang
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Xia
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry*; D007616:Kaolin / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D007477:Ions; D014874:Water Pollutants, Chemical; D014867:Water; D007616:Kaolin; D003300:Copper; D020723:Glucuronic Acid