It also showed that in each pollution factor, COD, BOD5 and the votile phenol contributed much more to the water quality of this river. Thus corresponding reason was analyzed.

在各污染因子中COD、BOD5、挥发酚类对河流水质的贡献率较大。由此分析了相应的原因。

youdao

Since phenol chemical compound is permanent organic pollutant, phenol-containing wastewater treating has the high priority in water pollution control in our country.

酚类化合物属于持久性有机污染物，含酚废水在我国水污染控制中被列为需要重点解决的有害废水之一。

youdao

China issued a second water-pollution alert within a month, when phenol, a dangerous chemical, leaked into the Yangzi river near Shanghai.

ECONOMIST: Politics this week