新型炭材料2011，Vol.26Issue(4)：299-306,8.DOI:10.1016/S1872-5805(11)60083-8
活性炭负载Fe(Ⅲ)氧化物去除水中的磷酸根
Adsorptive removal of phosphate from aqueous solutions using activated carbon loaded with Fe(Ⅲ) oxide
摘要
Abstract
An composite adsorbent for the removal of phosphate from aqueous solutions was synthesized by loading iron oxide onto activated carbon.The adsorbent can be separated from the medium by a simple magnetic procedure owing to the magnetic properties of the iron oxides.The properties of the composite were investigated by nitrogen adsorption,scanning electron microscopy and X-ray diffraction.The adsorption of phosphate ions by the composite adsorbent and the activated carbon was compared in batch experiments.The composite adsorbent showed fast adsorption rates and high adsorption capacities and its adsorptive performance for phosphate ions was dependent on the pH value,iron content and anion concentration.The adsorption capacities of phosphate ions at pH 3.0 were 98.39 mg/g for iron oxide/activated carbon composite and 78.90 mg/g for activated carbon.The adsorptive isotherms for phosphate ions with activated carbon and the composite adsorbent all match the Freundlich model better than the Langmuir model.The adsorption kinetic data could be well described by the Lagergren pseudo-second-order kinetic equation.The adsorption by the composite adsorbent is endothermic for phosphate ions.关键词
活性炭/铁氧化物/磷酸根/吸附Key words
Activated carbon/Iron oxide/Phosphate/Adsorption分类
通用工业技术引用本文复制引用
石中亮,刘富梅,姚淑华..活性炭负载Fe(Ⅲ)氧化物去除水中的磷酸根[J].新型炭材料,2011,26(4):299-306,8.基金项目
Education Foundation of Liaoning Province of China (2008573) and Doctor Foundation of Shenyang Institute of Chemical Technology,China (20063202).辽宁省教育厅基金(2008573),沈阳化工学院博士启动基金(20063202) （2008573）
