Phenol is a kind of toxic organic pollutant commonly emitted from industrialeffluents.
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 industrialeffluents 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.