环境监控与预警
環境鑑控與預警
배경감공여예경
ENVIRONMENTAL MONITORING AND FOREWARNING
2014年
4期
39-42
,共4页
贺心然%宋晓娟%逄勇%曹雷%赵颖
賀心然%宋曉娟%逄勇%曹雷%趙穎
하심연%송효연%방용%조뢰%조영
蔬菜基地%重金属%有机氯%连云港
蔬菜基地%重金屬%有機氯%連雲港
소채기지%중금속%유궤록%련운항
Vegetable base%Heavy metal%Organochlorine pesticide%Lianyungang
对连云港市3个典型蔬菜基地土壤中汞、铅等金属元素以及六六六、DDT和 BaP 等20种污染因子进行了调查,采用单因子污染指数、内梅罗污染指数及综合污染指数等相结合的方法进行了评价。结果表明,部分点位 Pb 和 DDT等含量超标,蔬菜基地土壤环境质量处于尚清洁或污染状态,已不能满足食用农产品生产的需求。大部分点位重金属含量高于江苏和全国黄棕壤土壤环境自然背景值,其中 Cd、Zn比背景值高近一倍,已经达到污染警戒水平,需查明 Hg、Cd、Zn、有机氯等污染来源。土壤中有机质含量较低,达到很缺乏级别。
對連雲港市3箇典型蔬菜基地土壤中汞、鉛等金屬元素以及六六六、DDT和 BaP 等20種汙染因子進行瞭調查,採用單因子汙染指數、內梅囉汙染指數及綜閤汙染指數等相結閤的方法進行瞭評價。結果錶明,部分點位 Pb 和 DDT等含量超標,蔬菜基地土壤環境質量處于尚清潔或汙染狀態,已不能滿足食用農產品生產的需求。大部分點位重金屬含量高于江囌和全國黃棕壤土壤環境自然揹景值,其中 Cd、Zn比揹景值高近一倍,已經達到汙染警戒水平,需查明 Hg、Cd、Zn、有機氯等汙染來源。土壤中有機質含量較低,達到很缺乏級彆。
대련운항시3개전형소채기지토양중홍、연등금속원소이급륙륙륙、DDT화 BaP 등20충오염인자진행료조사,채용단인자오염지수、내매라오염지수급종합오염지수등상결합적방법진행료평개。결과표명,부분점위 Pb 화 DDT등함량초표,소채기지토양배경질량처우상청길혹오염상태,이불능만족식용농산품생산적수구。대부분점위중금속함량고우강소화전국황종양토양배경자연배경치,기중 Cd、Zn비배경치고근일배,이경체도오염경계수평,수사명 Hg、Cd、Zn、유궤록등오염래원。토양중유궤질함량교저,체도흔결핍급별。
Soil samples collected from three typical vegetable bases in Lianyungang were analyzed to determine concentrations of 20 kinds of pollutants,such as heavy metals,Organochlorine Pesticides and benzo(a)pyrene.Single pollution index,Nemerow index and comprehensive pollution index for different pollutants were calculated.The results showed that pollution indexes of Pb and DDT were higher than standard concentration,leading to a 'polluted'level for the vegetable bases investigated,indicating that the quality of soil could not meet the demand for vegetables.Concentrations of heavy metal at most sites were higher than background values. Cd,Zn levels were nearly twice as high as the background values,leading to an 'alarming'level.Pollution sources of Hg,Cd,Zn and organic chlorine should be identified.Organic matter content of the soil were very low,belong to 'lacking'levels.