| 利用新型稀土铈铁复合吸附剂去除水体腐殖质的研究 |
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| 引用本文： | 张昱,杨敏,高迎新,黄霞,薛春芳.利用新型稀土铈铁复合吸附剂去除水体腐殖质的研究[J].环境科学,2004,25(1):83-86. |
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| 作者姓名： | 张昱 杨敏 高迎新 黄霞 薛春芳 |
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| 作者单位： | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085;清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金青年基金项目(20207013) |
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| 摘 要： | 研究了稀土铈铁复合材料(CFA)对水体中黄腐酸(FA)的去除效能和作用机制.结果表明:CFA在平衡pH3.0～6.5的范围内对FA的去除效果较好,吸附速度快,120min即达到平衡.水体中FA与砷酸根在CFA上有很强的竞争作用,当FA加入量为5mg/L～10mg/L时,砷的饱和吸附量Qo即丧失40%～50%,表明两者作用于材料相同的活性位点.吸附前后的红外谱图(FTIR)揭示了CFA表面羟基在FA去除中起着重要作用.通过Zeta电位的测定得出材料的等电点为5.6,因而pH偏酸性的条件有利于FA的去除.
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| 关 键 词： | 富里酸 稀土材料 砷酸根 吸附剂 腐殖质 |
| 文章编号： | 0250-3301(2004)01-0083-04 |
| 收稿时间： | 2003/1/17 0:00:00 |
| 修稿时间： | 2003/3/24 0:00:00 |
Removal of Humic Substances Using Cerium-Iron Adsorbent |
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| ZHANG Yu,YANG Min,GAO Ying-xin,HUANG Xia and XUE Chun-fang.Removal of Humic Substances Using Cerium-Iron Adsorbent[J].Chinese Journal of Environmental Science,2004,25(1):83-86. |
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| Authors: | ZHANG Yu YANG Min GAO Ying-xin HUANG Xia and XUE Chun-fang |
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| Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. |
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| Abstract: | A rare earth metal inorganic adsorbent, cerium-iron adsorbent (CFA), was developed, and its performance for fulvic acid (FA) removal was evaluated. Experimental results show that rare earth metal adsorbent had a relatively high adsorption capacity and good kinetic property for FA ion under the pH range of 3.0-6.5, then the adsorption capacity decreased with the increase of pH. FA seriously inhibited the removal of arsenate, suggesting that the adsorption sites for As(V) and FA were similar. Fourier transform infrared (FTIR) spectra of CFA before and after FA adsorption demonstrated that M-OH groups plays an important role for FA removal. The pH(icp) is 5.6 through the measure of Zeta potential. |
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| Keywords: | fulvic acid rare earth metal materials arsenate adsorbent humic substances |
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