Kinetics and Thermodynamics of Cd(Ⅱ) Sorption onto Sodium Alginate/Poly(vinyl alcohol)/Hydroxyapatite Composite Fiber

摘要：

　　In this paper,the sodium alginate(SA)/poly(vinylalcohol)(PVA)/hydroxyapatite(HAp) fiber was prepared via solution spinning.The adsorption properties of SA/PVA/HAp composite fiber were studied,and the adsorption kinetics and isotherms were investigated.The experimental results showed that the adsorption process was fast,in which half-equilibrium and equilibrium was obtained in 5 and 30 minutes,respectively.The pseudo-second-order kinetic model provided a better correlation of the experimental results.Both of Langmuir isotherm and Freundlich isotherm could describe the adsorption behavior of SA/PVA/HAp composite fiber towards cadmium.The positive △H° value and increased absolute value of the △G° with temperature indicate that high temperature is good to the adsorption process.

关键词： Hydroxyapatite Sodium alginate Poly(vinyl alcohol) Adsorption kinetics Thermodynamics

作者: Zize Yang Xiao Wang Chun Ma Lihua Lv Chunyan Wei Byung-gil Min

作者单位: School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China School of Light Industry and Chemical Engineering, Dalian Polytechnic University,Dalian 116034, Chin School of Advanced Materials and System Engineering, Kumoh National Institute of Technology,Gumi 730

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 480-485

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）