Wadanambi Lakmini, Dubey Brajesh, Townsend Timothy
Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, FL 32611-6450, USA.
J Hazard Mater. 2008 Aug 30;157(1):194-200. doi: 10.1016/j.jhazmat.2007.12.088. Epub 2008 Jan 4.
Lead leaching from lead-based paint (LBP) was examined using standardized laboratory protocols and tests with leachate from actual and simulated landfill environments. Two different LBP samples were tested; leaching solutions included leachates from three municipal solid waste (MSW) landfills and three construction and demolition (C&D) debris landfills. The toxicity characteristic leaching procedure (TCLP) and the synthetic precipitation leaching procedure (SPLP) were also performed. Lead concentrations were many times higher using the TCLP compared to the SPLP and the landfill leachates. No significant difference (alpha=0.05) was observed in leached lead concentrations from the MSW landfill and C&D debris landfill leachates. The impact of other building materials present in LBP debris on lead leaching was examined by testing mixtures of LBP (2%) and different building materials (98%; steel, wood, drywall, concrete). The type of substrate present impacted lead leaching results, with concrete demonstrating the most dramatic impact; the lowest lead concentrations were measured in the presence of concrete under both TCLP and SPLP extractions.
使用标准化实验室方案和实际及模拟垃圾填埋场环境渗滤液测试，对含铅涂料（LBP）中的铅浸出情况进行了研究。测试了两种不同的LBP样品；浸出溶液包括来自三个城市固体废物（MSW）填埋场和三个建筑与拆除（C&D）垃圾填埋场的渗滤液。还进行了毒性特征浸出程序（TCLP）和合成沉淀浸出程序（SPLP）。与SPLP和垃圾填埋场渗滤液相比，使用TCLP时铅浓度要高出许多倍。城市固体废物填埋场和建筑与拆除垃圾填埋场渗滤液的铅浸出浓度未观察到显著差异（α=0.05）。通过测试LBP（2%）与不同建筑材料（98%；钢、木材、石膏板、混凝土）的混合物，研究了LBP碎片中其他建筑材料对铅浸出的影响。存在的基质类型影响铅浸出结果，混凝土的影响最为显著；在TCLP和SPLP萃取条件下，有混凝土存在时测得的铅浓度最低。
