| 煤矸石中潜在有害微量元素淋溶析出研究 |
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| 引用本文： | 刘桂建,杨萍明,彭子成,吴恩江,王桂梁.煤矸石中潜在有害微量元素淋溶析出研究[J].高校地质学报,2001,7(4):449-457. |
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| 作者姓名： | 刘桂建 杨萍明 彭子成 吴恩江 王桂梁 |
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| 作者单位： | 1. 中国科学技术大学地球与空间科学系，安徽 合肥 230026; 2. 中国矿业大学资源与环境科学学院，江苏 徐州 221008 |
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| 基金项目： | 中国科学院王宽诚博士后工作奖励基金 (编号 :2 0 0 0 0 5 12 )，中国博士后科学基金 (2 0 0 0 31)资助 |
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| 摘 要： | 在煤矸石淋溶实验的基础上，研究了有害微量元素从煤矸石中淋溶析出的浓度与其在煤矸石中的含量和赋存状态的关系。结果表明，溶出浓度受淋溶时间，淋溶液温度，酸碱度的影响。淋溶液温度越高，淋溶时间越长，则有害微量元素从煤矸石中析出的浓度越高；不同的有害微量元素受淋溶液pH值大小影响程度也不相同。
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| 关 键 词： | 淋溶实验 有害微量元素 溶出浓度 煤矸石 赋存状态 |
| 文章编号： | 1006-7493(2001)04-449-09 |
| 收稿时间： | 2001-12-20 |
| 修稿时间： | 2001年2月3日 |
Study on Leaching of Potentially Hazardous Trace Elements from Coal-Waste Rocks |
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| LIU Gui jian,YANG Ping yue,PENG Zi cheng,WU En jiang,WANG Gui liang.Study on Leaching of Potentially Hazardous Trace Elements from Coal-Waste Rocks[J].Geological Journal of China Universities,2001,7(4):449-457. |
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| Authors: | LIU Gui jian YANG Ping yue PENG Zi cheng WU En jiang WANG Gui liang |
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| Institution: | 1. Department of Earth an Space Science, University of Science and Technology of China, Heifei 230026, China; 2. Department of Mineral Resource and Environment Science, China University of Mineral and Technology, Xuzhou 221008, China |
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| Abstract: | In China coal accounts for 75% of the total consumption of primary energy. Trace elements in coal are important because of their close association with environmental issues and the health of plants, animals and human beings . Consideration must be given to essentiality, non essentiality and toxicity that depend on concentrations, forms of existence of elements, pH and oxidation reduction conditions, and other factors. There are many hazardous minor elements in coal waste rocks. With the action of leaching by rain and water, some hazardous minor elements will be dissolved completely or partly and be separated from coal waste rocks into water or soil environment . Consequently, they would pollute water quality, destroy soil function and influence ecology development and human health . Leaching is an important way of environment pollution while hazardous minor elements are leached out from coal waste rocks and ashes. In this paper, based on the leaching experiments, leachable contents of hazardous minor elements from coal waste rocks are studied in relation to their forms of occurrences and contents in coal waste rocks, leaching times, leaching temperatures, and the pH values of the media. The higher temperature of leaching media and the longer leaching time, the higher leachable contents of hazardous minor elements. In the course of leaching, different hazardous minor elements are differently effected by pH values of leaching media. |
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| Keywords: | leaching experiment hazardous minor elements effecting factors leachable contents of elements coal waste rocks |
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