工业污水中硫化物测定的一种新分离法

硫化物分析方法通常使用部颁“环境监测分析方法”中的吹气法，在酸性条件下H2S随吹入载气（CO2或N2）的逸出而得到分离。该方法回收率虽高，但所需设备复杂，操作不方便。该文提出利用加入废水中的硫酸和Zn反应产生的H2为载体，使H2S随着H2的逸出得到分离。对模拟硫化物废水的分析表明，该分离方法的回收率为88％-110％，相对标准偏差为±3％。对实际焦化废水中的硫化物含量进行的测定也得到了很好的结果。该文所提出的分离方法装置简单，操作方便，具有较高的准确度和精确度，可以应用推广。

A New Separation Method for Sulfide Analysis in Industrial Wastewater

Sulfide in wastewater was generally analyzed by blower procedure, where H2S in strong acidic conditions was separated by carrier gas （CO2 or N2） . This traditional procedure requires complex devices and complicated operations, though the recovery is very high. In this paper, we propose a new procedure that uses H2 generated in situ by Zn and H2SO4 as carrier gas to separate H2S. The result from simulated S^2- wastewater analysis suggests that the recovery is 88 -110 and the relative standard deviation is ±3. Satisfactory result is also obtained by measuring S^2- in coking plant wastewater. This method only requires simple devices, can be executed easily, and achieves high accuracy and precision; thus it provides promising application in the practice of sulfide analysis.