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首页> 外文期刊>African Journal of Biotechnology >Chemical characterization and local dispersion of slag generated by a lead recovery plant in Central Mexico
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Chemical characterization and local dispersion of slag generated by a lead recovery plant in Central Mexico

机译：墨西哥中部铅回收厂产生的矿渣的化学表征和局部分散

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摘要

A toxic waste “slag” generated in a lead (Pb) recovery plant was characterized and its local “slag” dispersion was monitored. The major constituents of the “slag”, in increasing weight percent, were CaO (1.5), PbO (3.4), SiO2 (5.2), Na2O (17.8), SO3 (27.5) and Fe2O3 (40.7). The “slag” was alkaline with a pH of 10 and an electrical conductivity of 606 dS m-1. Tests for Pb leaching indicated that, in a moderately acid environment, as much as 8 mg Pb L-1 may be washed out of the “slag”; there are amounts that are well above the limits set by Mexican legislation. The highest concentration of Pb in soil surrounding the recycling plant (447 mg Pb kg-1) was found 50 m southwest of the recovery plant. Due to its high Pb level and easy dispersion into the environment, the health of human settlements in the area could be at risk.
机译：对铅（Pb）回收厂中产生的有毒废物“炉渣”进行了表征，并监测了其在当地的“炉渣”分散度。以重量百分比计，“炉渣”的主要成分是CaO（1.5），PbO（3.4），SiO2（5.2），Na2O（17.8），SO3（27.5）和Fe2O3（40.7）。 “炉渣”为碱性，pH为10，电导率为606 dS m-1。铅浸出测试表明，在中等酸性环境中，可以从“矿渣”中洗去多达8 mg的Pb L-1。有些金额远高于墨西哥法律设定的限制。在回收工厂西南50 m处发现了回收工厂周围土壤中的最高Pb浓度（447 mg Pb kg-1）。由于其高Pb含量且易于分散到环境中，该地区人类住区的健康可能受到威胁。

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