首页 > Term: pollutant
pollutant
Any undesirable solid, liquid or gaseous matter in a solid, liquid or gaseous environmental medium.
Note 1: ‘Undesirability’ is often concentration-dependent, low concentrations of most substances being tolerable or even essential in many cases.
Note 2: A primary pollutant is one emitted into the atmosphere, water, sediments or soil from an identifiable source.
Note 3: A secondary pollutant is a pollutant formed by chemical reaction in the atmosphere, water, sediments, or soil.
- 词性: noun
- 行业/领域: 生物学; 化学
- 类别 毒物学
- Company: National Library of Medicine
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创建者
- Walter Lane
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