Study on copper(Ⅱ)adsorption from an aqueous solution by the graft copolymer of cross-linked starch/acrylonitrile
In this research,a graft copolymer of cross-1inked starch/acrylonitrile(CLSAGCP)was used as all adsorbent for the removal of Cu(II)ions from an aqueous solution.Adsorption experiments were conducted under various conditions,I.E,initial concentration,temperature,and pH.The results showed that the conditions for the adsorption system was:temperature 30℃,pH5.An equilibrium adsorption time of 90 min,leading to a maximum percentage removal of Cu(II)ions>97％.The adsorption capacity(Q0)of CLSAGCP was 90 mg/g at 30℃and pH5.The adsorption thermodynamics and kinetics for Cu(II)were consistent with the Freundlich equation and the Lagergren equation.Which is a pseudo-first-order rate expression.Furthermore,the thermodynamic parameters,I.E,standard free energy(△Gθ),standard enthalpy(△Hθ),and standard entropy(△Sθ),of the adsorption process were calculated.The results Obtained are discussed in detail.The adsorption capability of various starches was compared:grafting copolymer of cross-linked Starch/Acrylonitrile(CLSAGCP)>grafting copolymer of original starch/Acrylomtrile(OSAGCP)>cross-linked starch(CLS)>original starch(OS)
adsorption graft copolymer of starch／acrylonitrile copper(II)ions kinetics asorption isotherm thermodynamic parameters
Yu-jun ZHANG Jing-bo HU Xiang-yang YAN Jie-rong CHEN
Department of Applied Chemistry,School of Chemitry and Chemical Engineering,Henan University of Tech Department of Environmental Science and Engineering,School of Energy and Power,Xian Jiaotong Univer
国际会议
西安
英文
749-755
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）