Fractionation of Pb in Soil of Abandoned Pb Mine by SEM-EDX and XRD

Journal of Applied Sciences and Environmental Management

BAPPAH, A.U.¹  HARUNA, ADAMU¹ 

关键词: Fractionation;    mineralogy;    Rhandirmwyn mine;    environment;    pollution;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

Mining activity has been associated with environmental pollution problem allthrough ages. Rhandirmwyn Pb mine was one of the most important mine site areas in SouthWales. At present, the mine waste and adits in the area are regarded as main sources of Pbpollution in the area. Therefore, scanning electron microscopy coupled with energy dispersiveX-ray spectrometer (SEM-EDX) were used for the identification of fractional forms of Pb thatare liable to leach out/down from the soil matrix of the abandoned mine site to surface-andundergroundwater bodies of the nearby localities, and to determine its association with soilcomponents using X-ray diffraction (XRD). Among the fractional forms of Pb, Galena,Anglesite, Cerussite, Mimetite and Pyromorphite were identified as the fractions of Pb foundin the soils of Nantymwyn (Rhandirmwyn) abandoned mine, of which Anglesite was the mostabundant fraction observed. Being the most soluble fraction of Pb among the five Pb mineralsobserved dissolution of this fraction from the abandoned mine is highly possible and could bea source of contamination of soils and surface-and-ground water sources of localities in thevicinity of the spoil mines. However, results of XRD indicated that the bulk chemistry of thesoil samples is dominated by quartz followed by aluminosilicates (comprise of illite andkaolinite and traces of pyrite, albite and orthoclase), all of which could be sink for Pb andcould possibly influence the mobility of the metal.

【 授权许可】

Unknown