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1·Phenol is a kind of toxic organic pollutant commonly emitted from industrial effluents.

苯酚是一种毒性有机污染物，通常源自工业废水。

2·In this paper, the preparatory treatment for determination of Cr6+ in ground water or industrial effluents by the method of spectrophotometry has been improved.

本文对二苯碳酰二肼分光光度法测定地表水及工业废水中六价铬的样品预处理方法提出了改进措施。

3·Such monitoring is important to prevent loss of valuable material or to detect possible pollutants in the effluents from industrial processes.

这种监测工作对于避免珍贵材料的损失或者检测工业过程的污水中可能存在的污染物质都是很重要的。

4·Organic chemicals which may be found as pollutants in waste water effluents from industrial or domestic sources, must be removed or destroyed before discharge to the environment.

在工业和家用废水中常常发现有机污染物。这些有机物在被排放到环境中之前，须先加以破坏或清除。