| Ca-Al-LDH对富里酸吸附性能的研究 |
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| 引用本文： | 李国莲,汪静柔,郭中伟,谢发之,李海斌,汪雪春.Ca-Al-LDH对富里酸吸附性能的研究[J].环境工程,2017,35(7):33-37. |
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| 作者姓名： | 李国莲 汪静柔 郭中伟 谢发之 李海斌 汪雪春 |
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| 作者单位： | 1. 安徽建筑大学环境与能源工程学院,合肥230601;安徽建筑大学水污染控制与废水资源化省级重点实验室,合肥230601;2. 安徽建筑大学环境与能源工程学院,合肥,230601;3. 安徽建筑大学材料与化学工程学院,合肥,230601 |
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| 基金项目： | 安徽省教育厅基金，安徽省自然科学基金 |
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| 摘 要： | 采用乙醇辅助液相共沉淀法制备Ca-Al-LDH(层状双金属氢氧化物),运用X射线衍射仪(XRD)和傅里叶变化红外光谱仪(FA-RT)对吸附前后的Ca-Al-LDH样品进行表征,并研究了Ca-Al-LDH对富里酸的吸附性能及其影响因素。结果表明:Ca-Al-LDH对富里酸吸附容量随p H的变化呈先增加后递减趋势,在p H为4时吸附容量达35.5 mg/g;吸附过程在24 h达到平衡;添加电解质Na NO3可抑制富里酸的吸附作用;吸附过程符合Langmuir模型,且吸附动力学过程符合准二级动力学方程。
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| 关 键 词： | 层状双金属氢氧化物 富里酸 吸附 性能 |
EXPLORING AND EVALUATION OF Ca-Al-LDH ADSORBENTS ON FULVIC ACID |
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| LI Guo-lian,WANG Jing-rou,GUO Zhong-wei,XIE Fa-zhi,LI Hai-bin,WANG Xue-chun.EXPLORING AND EVALUATION OF Ca-Al-LDH ADSORBENTS ON FULVIC ACID[J].Environmental Engineering,2017,35(7):33-37. |
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| Authors: | LI Guo-lian WANG Jing-rou GUO Zhong-wei XIE Fa-zhi LI Hai-bin WANG Xue-chun |
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| Abstract: | The research synthesized Ca-Al-LDH (layered double hydroxides) with liquid precipitation method,and evaluated its performance in fulvic acid adsorption under different impact factors.Samples before and after fulvic acid adsorption were characterized by X-ray diffraction and infrared spectroscopy.The experimental results showed that the adsorption capacity of Ca-Al-LDH on the fulvic acid adsorption increased first and then decreased with the increase of pH,and the maximum adsorption capacity was at pH =4.The adsorption process reached equilibrium at 24h.Additionally,co-existing competitive anions influenced fulvic acid adsorption.From batch adsorption experiments,we found that the adsorption fitted Langmuir model very well,the maximum adsorption capacity was 35.5mg/g.The adsorption kinetics followed a pseudo-second-order model. |
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| Keywords: | layered double hydroxides fulvic acid adsorption performance |
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