| 燃煤锅炉粉煤灰中痕量元素赋存形态研究 |
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| 引用本文： | 龚勋,徐明厚,张丹,吴涛,汤蕾,姚洪.燃煤锅炉粉煤灰中痕量元素赋存形态研究[J].工程热物理学报,2009,30(10). |
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| 作者姓名： | 龚勋 徐明厚 张丹 吴涛 汤蕾 姚洪 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室,湖北武汉,430074 |
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| 基金项目： | 国家自然科学基金，教育部博士点基金 |
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| 摘 要： | 本文运用改进的Tessier法对某燃煤电厂静电除尘器收集的三个电场的粉煤灰进行分级提取(SEE)实验研究.SEE实验将粉煤灰中的重金属分为五个存在形态进行分级提取:水溶态(pH=7),酸溶态(pH=5),氧化物结合态,难还原态及残渣态.试验结果表明,残渣态在ESP除尘器所收集的飞灰中含量占据绝大部分;在容易迁移的离子可交换态和酸溶态中,所研究的痕量重金属元素均呈现出FA1
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| 关 键 词： | 粉煤灰 痕量元素 逐级提取 |
SEQUENTIAL EXTRACTION OF HEAVY METALS IN FLY ASH FROM A COAL-FIRED POWER PLANT |
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| GONG Xun,XU Ming-Hou,ZHANG Dan,WU Tao,TANG Lei,YAO Hong.SEQUENTIAL EXTRACTION OF HEAVY METALS IN FLY ASH FROM A COAL-FIRED POWER PLANT[J].Journal of Engineering Thermophysics,2009,30(10). |
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| Authors: | GONG Xun XU Ming-Hou ZHANG Dan WU Tao TANG Lei YAO Hong |
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| Institution: | GONG Xun XU Ming-Hou ZHANG Dan WU Tao TANG Lei YAO Hong (State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | In this paper,Sequential extraction(SEE) is performed on fly ashes collected from three electrostatic precipitators in a coal-fired power plant in order to determine the binding forms of trace elements in the fly ash.Test results show that the major trace elements are enriched in the residue state in the fly ash.In the fractionation of ion-exchange and acid-soluble state,the trace elements we study are displayed as a trend of FA1
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| Keywords: | coal fly ash trace elements sequential extraction |
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