【摘要】 燃煤是成都市重金属污染的一个重要来源,目前对成都燃煤中重金属元素含量与城市环境污染的相关性研究相对较少。文章以成都市城东工业区为研究对象,利用X荧光分析方法对煤样、煤渣、煤灰、表层土、深层土4种重金属元素进行定量分析,探讨了燃煤中重金属含量与城市土壤重金属污染的相关关系。结果表明,(1)成都市工业用煤原产地煤样重金属元素的含量不尽相同,因此,企业需合理选择煤源。(2)土壤重金属元素污染与工业用煤正相关,工业用煤中有害元素含量较高的对当地土壤的污染也比较严重,相反工业用煤中含量较少的元素在土壤中含量也较小。(3)热电厂燃煤对城市重金属污染的行为属性表现为,Pb属于直接污染大气和土壤,而Cu、Zn、Cr富集在煤渣样、煤灰样中在后期造成对城市土壤的污染。更多还原

【Abstract】 Coal as fuel is an important sources for heavy metals in Chengdu city. At present, there are lack of studies on corelation between the content of heavy metals in Chengdu coal and urban environmental pollution. Considering the industrial estate in eastern of Chengdu city as research subject, this paper studied the content of four kinds of heavy metals in coal, cinder, coal ash, topsoil and deep soil through X fluorescence analysis. The results indicate that, (1) heavy metals’ contents of coal are different on some areas in Sichuan, so it is necessary to study the geologic characteristics and enrichment mechanism of heavy element. The enterprises should select the coal carefully. (2)There existing a positive correlation between heavy metals contamination of soil and the industrial coal. The soil pollution risk is increasing with the content of heavy metals in industrial coal. (3)Referring to the effect of thermal-electric plant coal on urban heavy metals pollution, we found that Pb element contaminated directly the atmosphere and the soil, whereas Cu, Zn and Cr enriched in cinder and coal ash, and will lead to soil pollution later.更多还原