特征污染因子
特征污染因子-
认真分析该地区重金属污染现状，并经过严格筛选，确定以Cr~（6+）为特征污染研究因子。
Through the investigation of the current situation of heavy metal pollution in this region and strict selection , Cr6 + was decided as the pollutional factor .
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通过调查沿河企业废水排放情况及水质特征，认为主要污染因子是pH值和盐度；
By investigating the wastewater discharge and wastewater quality in the enterprises along the river , pH value and salinity were the main pollution factors .