In Situ on Remediation of Lead Contaminated Soils

• Main Authors: Yu Ling Cheng, 陳俞伶
• Other Authors: Chio Jung Liou
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/88141342035690345880

碩士 === 國立屏東科技大學 === 環境工程與科學系 === 87 === The lead contaminated site in pingtung which results from inputs of disposition of the industrial wasted water. There are many techniques to deal with. These remediation techniques includes chemical stabilized method, bioaccumulation method , removal of polluted soils and addition of another clean soils on the surface, etc. The different remediation methods had different influences on reducing the solubility or the extractibility of the lead in the contaminated soils. In this study, the reaction of lead in contaminated soils to pyromorphite results in a reduction of bioavailable lead by the addition of phosphate rocks. According to the investigation of Pingtung Environmental Protection Agency, the contents of lead in contaminated sites had difference variety, therefore it is appropriate to estimate the spatial distributions of lead by means of Kriging . The contour maps of soil lead concentrations obtained by Kriging can help us in delineating contaminated soils . While the contents of lead in contaminated soils with 0.1 N HCl measured larger than 5000 mg Pb /Kg , we will dig these soils and make them solidification ; the contents of lead in contaminated soils with 0.1 N HCl ranged from 120-5000 mg Pb /Kg ,we accords with the conclusion of experiments to apply the appropriate phosphate rocks in contaminated soils. By forming pyromorphite, the bioavailability of lead in contaminated soils is expected to be reduced to the nature contents of lead in soils.