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Removal of heavy metals from artificial metals contaminated water samples based on micelle-templated silica modified with pyoverdin I

查看全文 作　　者：PANADDA [1]Tansupo;WORAKARN [1]Chamonkolpradit;SAKSIT [1]Chanthai;CHALERM [1]Ruangviriyachai 高影响力作者 机构地区：[1]Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.高影响力机构 出　　处：《Journal of Environmental Sciences》索引2009年第21卷第7期,共8页高影响力期刊 基　　金：supported by the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education;Khon Kaen University and the National Research Council of Thailand (NRCT) for facilitates both instruments and chemical including research grants 摘　　要：The micelle-templated silica (MTS) was firstly chemically modified with 3-glycidoxypropyl-trimethoxysilane (GPTMS) before immobilized with pyoverdin I. The characteristics of pyoverdin I-anchored onto the modified MTS were investigated using fluorescence, infrared spectra and scanning electron microscopy. The specific surface area of all materials was calculated by Brunauer, Emmett and Teller (BET) method using nitrogen isotherm adsorption data. As the results, the surface area of commercial silica gel decreased from 609.2 to 405.4 m2/g, it indicated that the pyoverdin I could be immobilized onto the surface of silica solid support. This adsorbent was used for extraction of Fe(III), Cu(II), Zn(II), and Pb(II) in artificial metals contaminated water. Experimental conditions for effective adsorption of trace levels of metal ions were optimized with respect to different experimental parameters using batch procedure. The optimum pH value for the removal of metal ions simultaneously on this adsorbent was 4.0. Complete desorption of the adsorbed metal ions from the adsorbent was carried out using 0.25 mol/L of EDTA. The effect of different cations and anions on the adsorption of these metals on adsorbent was studied and the results showed that the proposed adsorbent could be applied to the highly saline samples and the sample which contains some transition metals. 关 键 词：重金属污染 金属样品 模板 胶束 人工 等温吸附数据 硅改性 痕量金属离子
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