| 活性炭上吸附态重金属稳定性 |
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| 引用本文： | 范明霞, 童仕唐. 活性炭上吸附态重金属稳定性[J]. 环境工程学报, 2017, 11(1): 312-316. doi: 10.12030/j.cjee.201508191 |
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| 作者姓名： | 范明霞 童仕唐 |
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| 作者单位： | 1.湖北工业大学材料与化学工程学院, 武汉, 430068; 2.武汉科技大学化学工程与技术学院, 武汉, 430081 |
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| 基金项目： | 湖北省教育厅科学技术研究项目（Q20161409） 湖北工业大学绿色轻工材料湖北省重点实验室开放基金面上项目（省重点实验室科[2013]2号） 湖北工业大学博士科研启动基金（BSQD14001） |
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| 摘 要： | 为评价吸附后活性炭上重金属稳定性，采用BCR（European Communities Bureau of Reference）连续浸提法对吸附于活性炭上的重金属形态进行分析，分为可交换态、可还原态、可氧化态和残渣态。结果表明：未改性、硝酸改性、氨改性活性炭上Cr（Ⅵ）、Pb（Ⅱ）、Cd（Ⅱ）以残渣态稳定态为主，均在80%左右，在环境中的迁移性低，且改性后活性炭上重金属残渣态含量高于未改性活性炭。研究表明，应用BCR连续提取法有助于确定活性炭中重金属的污染状况和潜在释放能力。
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| 关 键 词： | 活性炭 重金属 BCR 稳定性 |
| 收稿时间： | 2015-09-25 |
Stability of heavy metals by adsorption on activated carbons |
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| FAN Mingxia, TONG Shitang. Stability of heavy metals by adsorption on activated carbons[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 312-316. doi: 10.12030/j.cjee.201508191 |
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| Authors: | FAN Mingxia TONG Shitang |
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| Affiliation: | 1.College of Material and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China; 2.College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | In order to study the stability of heavy metals adsorbed on activated carbons (ACs), speciations of heavy metals adsorbed on the surfaces of ACs were analyzed using the BCR (European Community Bureau of Reference) continuous extractor process. The heavy metals were partitioned into four operationally defined chemical forms:acid extractable, reducible, oxidizable, and residual. The results showed that 80% of adsorbed Cr(Ⅵ), Pb(Ⅱ), and Cd(Ⅱ) on ACs was in the form of residue, which does not migrate easily in the environment. Furthermore, the proportion of heavy metals in the residue state was higher on HNO3-AC and NH3-AC than on unmodified AC. Application of sequential extraction of BCR was useful in assessing the pollution and release capacity of heavy metals on activated carbons. |
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| Keywords: | activated carbon heavy metals BCR stability |
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