Preparation of quaternized dimethylaminoethylmethacrylate grafted nonwoven fabric for the removal of phosphate |
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| Authors: | Pınar Akkaş Kavaklı Cengiz Kavaklı Olgun Güven |
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| Affiliation: | 1. State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, No. 399, Binshuixi Road, Xiqing District, Tianjin 300387, China;2. School of Material Science and Engineering, Tianjin Polytechnic University, No. 399, Binshuixi Road, Xiqing District, Tianjin 300387, China;3. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, No. 399, Binshuixi Road, Xiqing District, Tianjin 300387, China;1. Philippine Nuclear Research Institute, Department of Science and Technology, Diliman, Quezon City 1101, Philippines;2. Department of Chemistry, Hacettepe University, Beytepe, 06800 Ankara, Turkey;1. Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;2. Center for Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra (Semarak), 54100 Kuala Lumpur, Malaysia;3. Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra (Semarak), 54100 Kuala Lumpur, Malaysia;4. Radiation Processing Technology Division, Malaysian Nuclear Agency, Kajang, Selangor, Malaysia |
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| Abstract: | Dimethylaminoethylmethacrylate (DMAEMA) grafted polyethylene/polypropylene (PE/PP) nonwoven fabric was prepared by radiation-induced graft polymerization. Grafting conditions were optimized and about 150% DMAEMA grafted samples were used for further experiments. DMAEMA graft chains were later quaternized with dimethyl sulphate for the removal of phosphate ions. Adsorption experiments were conducted with quaternized DMAEMA grafted fabric for phosphate removal at low (0.5–25 ppm) and high phosphate concentrations (50–1000 ppm). Adsorbed phosphate amounts at pH 7 were found to be 63 mg phosphate/g polymer and 512 mg phosphate/g polymer for low (25 ppm) and high phosphate concentrations (1000 ppm) respectively showing the efficiency of the adsorbent material in removing phosphate. The pH effect on phosphate adsorption showed that the quaternized DMAEMA grafted nonwoven fabric can adsorb phosphate over a wide pH range (5.00–9.00) indicating that adsorbent material can effectively remove different forms of phosphate ions, namely H2PO4?, HPO42? and PO43? in aqueous solution at this pH range where the species exist. Competitive adsorption experiments were also carried out with two concentration levels at pH 7 to investigate the effect of competing ions. Phosphate adsorption on quaternized DMAEMA grafted nonwoven fabric was found to be higher than the other competing ions at two concentration levels. At high concentration level, the adsorption order was phosphate>nitrite>bromide>sulphate>nitrate whereas at low concentration level, the order was phosphate?sulphate>bromide>nitrite>nitrate. |
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