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有色金属(冶炼部分):2021,(3):155-161
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钙铁基磷酸盐作为PRB反应介质修复锰污染地下水试验
(东华理工大学 核资源与环境国家重点实验室)
Experimental Study on Adsorption of Manganese from Aqueous Solution by Calcium-Iron Phosphate Composite
CHEN Jia-hong1,2, ZHANG Wei-min1,2, CHEN Jun-hua, ZHUO Zhen
(1.East China University of Technology;2.State Key Laboratory of Nuclear Resources and Environment)
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投稿时间:2020-10-30    修订日期:2020-11-05
中文摘要: 采用溶胶—凝胶法制备了一种新型的钙铁基磷酸盐复合材料(CIP),并采用静态吸附试验法探究了pH、反应时间、锰初始浓度及反应温度等因素对其吸附水溶液中Mn(Ⅱ)的影响。结果表明,CIP吸附水溶液中锰的最佳pH为5,CIP对水溶液中Mn(Ⅱ)具有良好的吸附性能,可作为去除水溶液中锰的PRB反应介质。CIP对水溶液中Mn(Ⅱ)吸附行为符合Langmuir吸附等温线模型和准二级动力学模型,最大理论单位吸附量为66.22 mg/g。热力学分析结果表明,CIP对猛的吸附是一个自发、吸热和熵增的过程。
中文关键词: 溶胶-凝胶法  磷酸盐复合材料    吸附  PRB
Abstract:A new calcium-iron phosphate composite (CIP) was prepared by sol-gel method. Effects of pH value, reaction time, initial concentration of manganese, and reaction temperature on adsorption of Mn(Ⅱ) in aqueous solution were investigated through static adsorption experiment. The results show that the optimum pH value of CIP adsorption of manganese in aqueous solution is 5. CIP has good adsorption performance for Mn(Ⅱ) in aqueous solution, which can be used as PRB reaction medium to remove manganese from aqueous solution. Adsorption behaviors of CIP on Mn(Ⅱ) in aqueous solution fit well to quasi-second-order kinetic model and Langmuir adsorption isotherm model. The maximum theoretical unit adsorption capacity of CIP is 66.22 mg/g. According to thermodynamic analysis, adsorption of manganese on CIP is a spontaneous, endothermic and entropy increasing process.
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基金项目:江西省自然科学基金资助项目(20202BABL204069)
引用文本:
陈家鸿,张卫民,陈俊华,卓振.钙铁基磷酸盐作为PRB反应介质修复锰污染地下水试验[J].有色金属(冶炼部分),2021(3):155-161.
CHEN Jia-hong,ZHANG Wei-min,CHEN Jun-hua,ZHUO Zhen.Experimental Study on Adsorption of Manganese from Aqueous Solution by Calcium-Iron Phosphate Composite[J].Nonferrous Metals (Extractive Metallurgy),2021(3):155-161.

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