Preparation of Spherical Silica-supported Biosorbent for Copper Ions Removal in Wastewater Based on Sol-gel Reaction and Simple Treatment with Sodium Hydroxide  

作　　者：ZHENG Li JIANG Feng-hua DONG Ping-jun ZHUANG Qian-fen LI Feng 2 

机构地区：[1]Marine Ecology Research Center, First Institute of Oceanograph, State Oceanic Administration, Qingdao 266061, P. R. China [2]College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China

出　　处：《Chemical Research in Chinese Universities》2010年第3期355-359,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.20775039 and 20602009);the Natural Science Founda-tion of Shandong Province of China(No.ZR2009BM031 and Q2008B05);the Public Welfare Project of Marine Science Research of China(Nos.200705011 and 200805039);the Science Research Fund of the First Institute of Oceanograph of China

摘　　要：A new and effective strategy was proposed for preparing new organic-inorganic composite biosorbent with spherical silica as supporting core and chitosan（CS）-based hybrid layer as shell based on sol-gel reaction and simple treatment with sodium hydroxide（NaOH）. The coating layer was covalently bound on the supporting silica through polysaccharide incorporated sol-gel process starting from CS and inorganic precursor γ-glycidoxypropyltrimethoxysiloxane（GPTMS）. GPTMS had epoxide groups and cross-linked amine groups of CS to avoid its acidic solubilization. The composite biosorbent had coarse surface due to the wet phase-inversion by treating in NaOH solution. The prepared biosorbent could be used in treating electric plating wastewater.A new and effective strategy was proposed for preparing new organic-inorganic composite biosorbent with spherical silica as supporting core and chitosan（CS）-based hybrid layer as shell based on sol-gel reaction and simple treatment with sodium hydroxide（NaOH）. The coating layer was covalently bound on the supporting silica through polysaccharide incorporated sol-gel process starting from CS and inorganic precursor γ-glycidoxypropyltrimethoxysiloxane（GPTMS）. GPTMS had epoxide groups and cross-linked amine groups of CS to avoid its acidic solubilization. The composite biosorbent had coarse surface due to the wet phase-inversion by treating in NaOH solution. The prepared biosorbent could be used in treating electric plating wastewater.

关 键 词：CHITOSAN Sodium hydroxide BIOSORPTION Waste treatment 

分 类 号：TQ327.9[化学工程—合成树脂塑料工业] X703[环境科学与工程—环境工程]