燃煤固廢重金屬分布特征與環境風險研究

毛禮鑫; 朱士飛; 吳蒙; 趙倩; 王鵬程; 秦云虎

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燃煤固廢重金屬分布特征與環境風險研究

首發時間：2023-09-04

毛禮鑫 ^{1
2}
毛禮鑫（1994-），男，工程師，主要研究方向為煤系礦產資源勘探開發
朱士飛 ^{1
2}
朱士飛，男，教授級高級工程師，主要研究方向為地質礦產勘查開發， 154432772@qq.com
吳蒙 ^{1
2} 趙倩 ³ 王鵬程 ⁴ 秦云虎 ^{1
2}

1、江蘇地質礦產設計研究院，江蘇徐州 221006
2、中國煤炭地質總局煤系礦產資源重點實驗室，江蘇徐州 221006
3、江蘇省有色金屬華東地質勘查局，南京 210007
4、兗礦能源集團股份有限公司濟寧二號煤礦，山東濟寧 272072

摘要：The coal-fired solid waste from thermal power plants is produced in large quatity, and heavy metal pollution risk exists in accumulation treatment or resource utilization. In order to study the distribution characteristics of heavy metals in different coal-fired solid wastes and their effects on human health, the K power Plant in Jiangsu Province was taken as an example and the contents of heavy metals and major elements were measured by inductively coupled plasma mass spectrometry, atomic fluorescence spectrometer and X-ray fluorescence spectrometer. The results show that the content of heavy metal in coal-fired solid waste reduces in the order of Mn（859.51μg/g）> Cr（129.72μg/g）> Pb（87.37μg/g）> Cu（72.59）> Ni（38.81μg/g）> As（32.50μg/g）> Cd（0.42μg/g）> Hg（0.38μg/g）. The distribution of Cu, Ni, Mn and Cr in various wastes decreases in the order of slag, coarse ash and fine ash, accounting for 29-60%, 22-41% and 17-33% respectively. However, the distribution of As, Hg, Cd and Pb exhibits an opposite trend, accounting for 1-8%, 36-41% and 51-61% in the slag, coarse ash and fine ash respectively. The enrichment of heavy metals is characterised by a "stepwise" pattern, which is affected by the element volatility, occurrence form and other chemical components. The evaluation results of potential ecological risk index showed that the comprehensive pollution level of fine ash was strong（RI = 428）, among which Hg, As and Cd were the major contributing factors. The results of US EPA model evaluation show that the non-carcinogenic risk of heavy metals in coal solid waste is low, and the carcinogenic risk is in the acceptable range, among which Cr is the major contributing factor. Attention should be paid to Hg, As, Cd in fine ash and Cr in slag during the prevention and control of heavy metals and the resource utilization of solid waste.

關鍵詞： coal-fired products; fly ash; heavy metals; environmental risk

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Distribution and environmental risk assessment of heavy metals in coal-fired products of power plants

MAO Lixin ^{1
2}
毛禮鑫（1994-），男，工程師，主要研究方向為煤系礦產資源勘探開發
ZHU Shifei ^{1
2}
朱士飛，男，教授級高級工程師，主要研究方向為地質礦產勘查開發， 154432772@qq.com
WU Meng ^{1
2} ZHAO Qian ³ Wang Pengcheng ⁴ QIN Yunhu ^{1
2}

1、Jiangsu Design Institute of Geology for Mineral Resources, Xuzhou, Jiangsu 221006, China
2、CNACG Key Laboratory of Mineral Resource in Coal Measures, Xuzhou, Jiangsu 221006, China
3、East China Mineral Exploration and Development Bureau，Nanjing 210007，China
4、Jining No.3 Coal Mine, Yankuang Energy Group Company Limited, Jining, Shandong 272072, China

Abstract：The coal-fired solid waste from thermal power plants is produced in large quatity, and heavy metal pollution risk exists in accumulation treatment or resource utilization. In order to study the distribution characteristics of heavy metals in different coal-fired solid wastes and their effects on human health, the K power Plant in Jiangsu Province was taken as an example and the contents of heavy metals and major elements were measured by inductively coupled plasma mass spectrometry, atomic fluorescence spectrometer and X-ray fluorescence spectrometer. The results show that the content of heavy metal in coal-fired solid waste reduces in the order of Mn（859.51μg/g）> Cr（129.72μg/g）> Pb（87.37μg/g）> Cu（72.59）> Ni（38.81μg/g）> As（32.50μg/g）> Cd（0.42μg/g）> Hg（0.38μg/g）. The distribution of Cu, Ni, Mn and Cr in various wastes decreases in the order of slag, coarse ash and fine ash, accounting for 29-60%, 22-41% and 17-33% respectively. However, the distribution of As, Hg, Cd and Pb exhibits an opposite trend, accounting for 1-8%, 36-41% and 51-61% in the slag, coarse ash and fine ash respectively. The enrichment of heavy metals is characterised by a "stepwise" pattern, which is affected by the element volatility, occurrence form and other chemical components. The evaluation results of potential ecological risk index showed that the comprehensive pollution level of fine ash was strong（RI = 428）, among which Hg, As and Cd were the major contributing factors. The results of US EPA model evaluation show that the non-carcinogenic risk of heavy metals in coal solid waste is low, and the carcinogenic risk is in the acceptable range, among which Cr is the major contributing factor. Attention should be paid to Hg, As, Cd in fine ash and Cr in slag during the prevention and control of heavy metals and the resource utilization of solid waste.

Keywords： coal-fired products fly ash heavy metals environmental risk

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毛禮鑫，朱士飛，吳蒙，等. 燃煤固廢重金屬分布特征與環境風險研究[EB/OL]. 北京：中國科技論文在線 [2023-09-04]. http://www.maigrir-regime-musculation.com/releasepaper/content/202309-13.

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論文編號	202309-13
論文題目	燃煤固廢重金屬分布特征與環境風險研究
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