| 利用稀土基无机合成材料去除饮用水中砷的研究 |
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| 引用本文： | 张昱,杨敏,王桂燕,黄霞.利用稀土基无机合成材料去除饮用水中砷的研究[J].环境化学,2001,20(1):70-75. |
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| 作者姓名： | 张昱 杨敏 王桂燕 黄霞 |
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| 作者单位： | 1. 中国科学院生态环境研究中心,
2. 清华大学环境工程系, |
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| 基金项目： | 本课题受日中技术交流荏原基金，中国科学院百人计划经费资助 |
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| 摘 要： | 本文研制了一种新型除砷吸附剂,即基于稀土金属铈的无机铈铁吸附剂,并对该吸附剂的除砷效果进行了评价．活性氧化铝和新型研制的铈铁吸附剂对Ａｓ(Ⅴ)吸附平衡比较实验结果表明:活性氧化铝除砷的最佳 ｐＨ为 ３．５－５．５,最大吸附量为８６ｍｇ Ａｓ(Ⅴ)·ｇ－１;而铈铁吸附剂的ｐＨ适用范围广,在ｐＨ３－７的范围内具有较高的除砷性能,最大吸附量可达１６．０ｍｇＡｓ(Ⅴ)·ｇ－１,该吸附材料对Ａｓ(Ⅴ)的吸附基本符合Ｆｒｅｕｎｄｌｉｃｈ型等温方程式,硬度、盐度和氟离子不干扰吸附过程,但磷酸根离子干扰材料对Ａｓ(Ⅴ)的吸附、铈铁无机吸附材料在饮水除砷中具有比较大的应用前景．
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| 关 键 词： | 饮用水 除砷 吸附 稀土基 无机合成材料 |
ADSORPTION OF ARSENIC FROM DRINKING WATER ON RARE EARTH BASED INORGANIC ADSORBENT |
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| Zhang Yu,Yang Min,Wang Guiyan,Huang Xia.ADSORPTION OF ARSENIC FROM DRINKING WATER ON RARE EARTH BASED INORGANIC ADSORBENT[J].Environmental Chemistry,2001,20(1):70-75. |
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| Authors: | Zhang Yu Yang Min Wang Guiyan Huang Xia |
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| Abstract: | A rare earth metal based inorganic adsorbent,cerium-iron adsorbent,developed,and its performance for arsenic removal was evaluated.The performance of the inorganic adsorbent for arsenic(Ⅴ)removal was compared with that of activated alumina,a conventional adsorbent for arsenic(Ⅴ)removal.Experimental results show that the capacity of rare earth metal based absorbent was almost constant around a value of 16.0mg As(Ⅴ)*g－1 over a wide pH range of 3—7,while the maximum adsorption capacity of activated alumina of 8.6mg As(Ⅴ)*g－1 was obtained in a much narrower pH range of 3.5 to 5.5.The results shows that the adsorption of As(Ⅴ)on Ce-Fe adsorption follows Freundlich isotherm in the tested range of As concentrations. Salinity,hardness and fluoride didn’t interfere with the adsorption of As,but phosphate inhibited the removal of As seriously.The above results demonstrate the effectiveness of the new adsorbent for arsenic removal. |
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| Keywords: | arsenic removal adsorption rare earth metal |
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