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首页> 外文期刊>Journal of Hazardous Materials >Evaluating the applicability of a modified toxicity characteristic leaching procedure (TCLP) for the classification of cementitious wastes containing lead and cadmium
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Evaluating the applicability of a modified toxicity characteristic leaching procedure (TCLP) for the classification of cementitious wastes containing lead and cadmium

机译：评估改良的毒性特征浸出程序（TCLP）对含铅和镉的水泥性废物进行分类的适用性

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摘要

Having the toxicity characteristic leaching procedure (TCLP) as a starting point, this study examined the effect of the various leaching parameters on the leaching of Pb and Cd from cementitious wastes. Using modified TCLP procedures, the parameters investigated were the acid concentration, leaching duration, particle size of the crushed waste, liquid to solid ratio, and the acid type. The main finding was that the final leachate pH controls the teachability of metals due to its influence on their solubility. The high alkalinity of cementitious waste buffers the leachate at a pH where most metals become insoluble. The TCLP was found to result in an unrealistic condition for cementitious wastes due to the high resultant leachate pH.
机译：本研究以毒性特征浸出程序（TCLP）为出发点，研究了各种浸出参数对水泥废物中铅和镉的浸出的影响。使用改进的TCLP程序，研究的参数为酸浓度，浸出持续时间，压碎废物的粒径，液固比和酸类型。主要发现是，由于最终浸出液的pH值对金属的溶解度有影响，因此最终的pH值控制了它们的可教导性。水泥废料的高碱度可在大多数金属变得不溶的pH值下缓冲渗滤液。由于产生的高渗滤液pH，发现TCLP导致水泥废物的现状不切实际。

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