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According to the principles of simultaneous equilibrium and electronic charge neutrality, the thermodynamics of Zn(II)-NaOH-H2O system was studied in this paper. Varying the concentration of sodium hydroxide, in range of 0- 400 g/L, the distribution law of all zinc species and the mathematical model of equilibrium concentration of zinc in the system were obtained. The relative errors between theoretic calculation and the experimental values of total concentration of zinc were analyzed, and the absolute average error is only 0.129 8%. The mathematical model and the thermodynamic data are believable. 相似文献
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针对建筑垃圾中汞污染问题,对化工、冶金、轻工、生活区、再生等5种不同来源建筑垃圾的汞含量进行分析,并评估其污染程度.研究结果表明:建筑垃圾中汞的含量范围为6.46~1542.83μg/kg ,平均值为164.97μg/kg ,化工行业建筑垃圾汞的平均含量水平大于土壤一级标准阈值,其他来源均低于土壤一级标准阈值.源于化工行业的建筑垃圾汞污染较其他行业严重,为中度污染;其他4种来源的建筑垃圾属低污染. 相似文献
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