CAJ | 학술논문

采用单项污染指数法对湖南某铅锌冶炼厂周边农田土壤及农作物中的Cd污染状况进行了评价，结果表明，土壤中Cd含量达22～42 mg kg-1，超过了土壤环境质量标准二级标准限值35～70倍，根据单项污染指数评价法该土壤属于重度污染。土壤Cd的形态中容易被植物利用的形态（水溶态、可交换态、碳酸盐结合态、铁锰氧化态、有机结合态）占78.25%，不能被植物利用的形态（残渣态）只占21.75%，因此，土壤中的Cd极容易被植物利用。种植在Cd重污染土壤中的农作物也出现Cd超标，含量高达0.4～1.3 mg kg-1，超过食品中污染物限量6～10倍。
채용단항오염지수법대호남모연자야련엄주변농전토양급농작물중적Cd오염상황진행료평개，결과표명，토양중Cd함량체22～42 mg kg-1，초과료토양배경질량표준이급표준한치35～70배，근거단항오염지수평개법해토양속우중도오염。토양Cd적형태중용역피식물이용적형태（수용태、가교환태、탄산염결합태、철맹양화태、유궤결합태）점78.25%，불능피식물이용적형태（잔사태）지점21.75%，인차，토양중적Cd겁용역피식물이용。충식재Cd중오염토양중적농작물야출현Cd초표，함량고체0.4～1.3 mg kg-1，초과식품중오염물한량6～10배。
Cd pollution in the agricultural soil and crops around the lead and zinc smelting plant area was assessed by single pollution index method.The result indicates that the content of Cd in soil reach 22~42 mg kg-1. It exceed the second level criterion of standard of soil environment value 35~70 times.Based on the single pollution index assessment method,it is the serious pollution. The forms of Cd easily used by plant(water soluble,exchangeable,carbonate,manganese oxides,organic matter bound)account for 78.25%,and the forms hardly used by plant (residual)only account for 21.75%,so the Cd in the soil is easy to use by plants. The contents of Cd in the crops cultivated in the polluted soil are also reach 0.4~1.3 mg kg-1 and exceed the standards of heavy metal pollution in food 6~10 times.