title: Synthesis of polyacrylate/polyethylene glycol interpenetrating network hydrogel and its sorption of heavy-metal ions.
abstract: A simple two-step aqueous polymerization method was introduced to synthesize a polyacrylate/polyethylene glycol (PAC/PEG) interpenetrating network (IPN) hydrogel. On the basis of the effects of the ratio of PAC to PEG, neutralization degree, heavy-metal ion concentration, and temperature on the adsorption behavior of PAC/PEG IPN hydrogel toward Ni2 +, Cr3 +and Cd2 +, the preparation conditions were optimized. In our system, the greatest amount of Ni2 +, Cr3 +and Cd2 +adsorbed were 102.34, 49.38 and 33.41 mg g- 1, respectively. The adsorption abilities of a dried PAC/PEG composite and a swollen PAC/PEG IPN hydrogel were compared. It was found that the efficiency of removing metal ions using the swollen hydrogel was greater than that using the dried composite. The adsorption mechanism and model are also discussed.
authors.affiliation: The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
authors.forename: Qunwei
authors.initials: Q
authors.lastname: Tang
authors.affiliation: The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Sun
authors.affiliation: The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Li
authors.affiliation: The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
authors.forename: Jihuai
authors.initials: J
authors.lastname: Wu
authors.affiliation: The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
authors.forename: Jianming
authors.initials: J
authors.lastname: Lin
keywords: heavy-metal adsorption; hydrogel; interpenetrating network; polyacrylate/polyethylene glycol