柠檬酸、草酸和乙酸对污泥中镉、铅、铜和锌的去除效果

应用生态学报

柠檬酸、草酸和乙酸对污泥中镉、铅、铜和锌的去除效果

黄亮^{1, 3, 4};周启星^{1, 2};张倩茹^1,4

¹中国科学院沈阳应用生态研究所中国科学院陆地生态过程重点实验室，沈阳 110016；²南开大学环境科学与工程学院教育部环境污染过程与基准重点实验室，天津 300071；³辽宁省大气污染防治管理中心，沈阳 110033；⁴中国科学院研究生院，北京 100039

收稿日期:2007-04-14 修回日期:1900-01-01 出版日期:2008-03-21 发布日期:2008-03-21

Removal effects of citric acid, oxalic acid and acetic acid on Cd, Pb, Cu and Zn in sewage sludge.

HUANG Liang^1,3,4;ZHOU Qi-xing^1,2;ZHANG Qian-ru^1,4

¹Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ²Key Laboratory of Pollution Processes and Environmental Criteria， Ministry of Education， College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;³Liaoning Control and Management Center of Atmosphere Pollution, Shenyang 110033, China;⁴Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-04-14 Revised:1900-01-01 Online:2008-03-21 Published:2008-03-21

摘要/Abstract

摘要： 研究了柠檬酸、草酸和乙酸对污泥中Cd、Pb、Cu和Zn等重金属的去除效果，并分析了污泥中重金属的形态变化和生物有效性.结果表明，随着反应时间和酸浓度的增加，污泥中重金属（Cu除外）的去除率也相应增加.污泥加入柠檬酸溶液反应7 h即可去除污泥中52.0%的Pb和74.2％的Zn, 24 h后可去除76.0%的Pb和92.5%的Zn，草酸和乙酸对重金属的去除率较低.柠檬酸去除的Pb和Zn主要以稳定态存在，并导致污泥中不稳定态重金属的比例上升，其中可交换态重金属浓度有不同程度的增加.虽然有机酸对Cd和Cu的去除率较低，但反应后可交换态Cd和Cu的浓度仍有小幅增加.

关键词: 城市森林, 梯度分析, 优化对策, 景观生态格局

Abstract: This paper studied the effects of applying citric acid, oxalic acid and acetic acid on the removal of heavy metals Cd, Pb, Cu and Zn from sewage sludge, and the form transformation and bioavailability of these heavy metals before and after the application of tested organic acids. The results showed that the removal rates of tested heavy metals except Cu increased with increasing acid concentration and action time. Among the tested organic acids, citric acid was more effective in removing heavy metals from sewage sludge, with the removal rate of 52.0% for Pb and 74.2% for Zn after a 7-hour action, and 76.0% for Pb and 92.5% for Zn after 24-hour action. The removal rates of the heavy metals by oxalic acid and acetic acid were relatively low. The Pb and Zn removed by citric acid were mainly in stable form, resulting in a relative increase of their unstable and exchangeable forms in the sludge. Though the removal rate of Cu and Cd was lower, their exchangeable forms still had somewhat increase after the action of tested organic acids.

Key words: landscape ecological pattern, optimization strategy, urban forest, gradient analysis

黄亮^{1, 3, 4};周启星^{1, 2};张倩茹^1,4. 柠檬酸、草酸和乙酸对污泥中镉、铅、铜和锌的去除效果[J]. 应用生态学报.

HUANG Liang^1,3,4;ZHOU Qi-xing^1,2;ZHANG Qian-ru^1,4 . Removal effects of citric acid, oxalic acid and acetic acid on Cd, Pb, Cu and Zn in sewage sludge. [J]. Chinese Journal of Applied Ecology.

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