矸石电厂不同粒径粉煤灰中重金属分布规律的研究

粉煤灰的大气污染是其造成环境污染的主要因素,造成的危害与其成分有密切关系。应用强酸消解法结合AAS测试研究了新汶矿区五个矸石电厂的不同粒径粉煤灰中Cu、Zn、Pb、Cd、Cr五种重金属的含量,得出了在不同粒径粉煤灰中重金属分布规律,即:Cu、Zn、Pb、Cd的含量随粒径减小有不同程度的增加,细粒径灰中的重金属元素总量高于粗粒径灰,在细粒径灰中明显富集的趋势;但Cr与其它元素不同,随粉煤灰粒径变小其含量则呈降低趋势。粉煤灰颗粒的吸附性能及元素的地球化学性质影响重金属在不同粒径粉煤灰中的含量,应注意细粒径粉煤灰的环境影响。

Distribution Law of Heavy Metals in Fly Ash with Different Grain Sizes in Gangue Power Plant

Air pollution caused by fly ash is related to its components.Distribution law of heavy metals in fly ash with different grain sizes in Xinwen Mining Area was studied by chemical analysis method.Results show that the contents of heavy metals in fly ash with different grain sizes are different and the trend is that contents of copper,zinc,lead,cadmium increase as grain size diminishes,but chromium is the contrary.The content of heavy metals in fly ash with different grain sizes is influenced by adsorption capability of fly ash and geochemical property of element.Environmental impact caused by fly ash with small grain size should be noticed.