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| 煤矸石模拟淋滤实验中重金属污染物的释放特征分析 |
| Study on Characteristics of Heavy Metal Pollutants Leaching from Coal Gangue by Simulation Experiment |
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| DOI： |
| 中文关键词: 重金属 动态淋滤 释放量 污染指数 煤矸石 |
| 英文关键词: Heavy metals Dynamic leaching Release amount Pollution index Coal gangue |
| 基金项目:新疆维吾尔自治区级大学生创新训练基金资助项目（S202210994036）；新疆维吾尔自治区高校基本科研业务基金资助项目（XJEDU2023P135）；国家自然科学基金资助项目（22266033）；新疆工程学院博士启动基金资助项目（2018xgy062105） |
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| 摘要点击次数: 35 |
| 全文下载次数: 25 |
| 中文摘要: |
| 以新疆某采矿区煤矸石为研究对象，采用动态淋滤实验研究煤矸石中Cu、Cd、Cr、Pb的淋出浓度特征，分析4种金属元素的释放规律，评价其对环境的污染程度，考察淋滤条件对金属元素释放的影响。结果表明，Cu、Cd、Cr、Pb在淋滤前期表现为淋出浓度较高，释放速率较快的特征，随着淋滤时间的延长，各金属元素的淋出浓度降低，释放速率减缓，直至淋滤后期淋出浓度趋于稳定，释放量达到平衡；释放量和淋出率分别表现为Cr＞Cu＞Pb＞Cd和Cd＞Cr＞Cu＞Pb；除Cd外，其余金属元素的释放量随淋滤液pH值的减小和氧化还原电位的增加而升高。 |
| 英文摘要: |
| Taking coal gangue from a mining area in Xinjiang as the research object，dynamic leaching experiments were conducted to study the leaching characteristics of Cu, Cd, Cr and Pb in coal gangue. The release patterns of the four elements were analyzed, the pollution level to the environment was evaluated, and the influence of leaching conditions on the release was investigated. The result showed that Cu, Cd, Cr and Pb had the characteristics of high leaching concentration and fast release rate in the early stage of leaching. With the extension of leaching time，the leaching concentration of each element decreased and the release rate slowed down until the leaching concentration tended to be stable and the release amount reached equilibrium in the later stage of leaching. The release amount and leaching rate of each element were Cr＞Cu＞Pb＞Cd and Cd＞Cr＞Cu＞Pb，respectively. Except for Cd，the release of other elements increased with the decrease of pH value of leachate and the increase of radox potential. |
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