| 氯化镧改性黏土固化湖泊底泥中磷的研究 |
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| 引用本文： | 袁宪正,潘纲,田秉晖,陈灏.氯化镧改性黏土固化湖泊底泥中磷的研究[J].环境科学,2007,28(2):403-406. |
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| 作者姓名： | 袁宪正 潘纲 田秉晖 陈灏 |
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| 作者单位： | 1. 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;中国科学院研究生院,北京,100049
2. 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 |
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| 基金项目： | 国家高技术研究发展计划（863）项目（2002AA60101） |
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| 摘 要： | 用氯化镧对14种黏土进行改性并研究了这些改性黏土固化磷的效果.研究了pH对改性高岭土磷吸附率和镧离子溶出的影响.结果表明,通过氯化镧改性,不同黏土的磷固定率由改性前的3%～14%提高到改性后的52%～95%.氯化镧改性高岭土在pH为5时,达到磷吸附率的最大值94.85%,并在pH值4～8范围内,保持较高的磷吸附率（>80%）.在pH>6.5的范围,La3+溶出浓度低于0.0178 mg/L.
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| 关 键 词： | 湖泊内源污染治理 氯化镧改性黏土 富营养化 磷去除 |
| 文章编号： | 0250-3301（2007）02-0403-04 |
| 收稿时间： | 2006/3/27 0:00:00 |
| 修稿时间： | 8/8/2006 12:00:00 AM |
Study on Phosphorus(P) Fixation in the Sediment of Lake Using the Clays Modified by LaCl3 |
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| YUAN Xian-zheng,PAN Gang,TIAN Bing-hui and CHEN Hao.Study on Phosphorus(P) Fixation in the Sediment of Lake Using the Clays Modified by LaCl3[J].Chinese Journal of Environmental Science,2007,28(2):403-406. |
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| Authors: | YUAN Xian-zheng PAN Gang TIAN Bing-hui and CHEN Hao |
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| Institution: | 1 .State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | 14 kinds of clay modified by LaCl3 were prepared and their phosphorus (P) fixation was studied. The effect of pH on adsorption rate of P using kaolin modified by LaCl3 and dissolved concentration of La3+ from them were also discussed. The results showed that the fixation rates of P using clay modified by LaCl3 were improved to 52%~95% from 3%~14% using unmodified clay. The maximum adsorption rate of P using kaolin modified by LaCl3 was 94.85% on the pH value of 5. Under the condition of pH range from 4 to 8, the P adsorption rate was higher than 80%. When the pH value was higher than 6.5, the dissolved concentration of La3+ from the modified clay was lower than 0.0178mg/L. This research provided an important way to solve internal phosphorus pollution in sediments of lakes. |
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| Keywords: | treatment of internal phosphorus clay modified by LaCl3 eutrophication P removal |
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