CAJ | 학술논문

污灌污染是一个亟待解决的土壤环境问题,研究污灌区土壤重金属污染状况及其动态对于土壤重金属污染修复具有现实意义.该文以奎河污灌区为例,通过文献资料搜集和现场监测获取相关数据,采用单因子污染指数法和内梅罗综合污染指数法评价了污灌区重金属污染状况,结果表明土壤 As 轻度污染,水田样点超标率达89.93%,旱地样点超标率达82.39%,水田综合污染指数为1.39,旱地综合污染指数为1.19.以 As 为例,采用系统动力学方法分析了 As 含量的变化.结果表明在当前种植制度下,土壤 As 的消除是一个漫长的过程,需要到2016年土壤 As 质量分数才会降低到30 mg/kg 以下,2024年后才会低于25 mg/kg,达到当地土壤 As 背景值更需要到2073年.清除作物秸秆和根系对于消除土壤 As 污染有益,尤其是远期效果明显,而表层土壤的流失对于土壤 As的清除作用显著.
오관오염시일개극대해결적토양배경문제,연구오관구토양중금속오염상황급기동태대우토양중금속오염수복구유현실의의.해문이규하오관구위례,통과문헌자료수집화현장감측획취상관수거,채용단인자오염지수법화내매라종합오염지수법평개료오관구중금속오염상황,결과표명토양 As 경도오염,수전양점초표솔체89.93%,한지양점초표솔체82.39%,수전종합오염지수위1.39,한지종합오염지수위1.19.이 As 위례,채용계통동역학방법분석료 As 함량적변화.결과표명재당전충식제도하,토양 As 적소제시일개만장적과정,수요도2016년토양 As 질량분수재회강저도30 mg/kg 이하,2024년후재회저우25 mg/kg,체도당지토양 As 배경치경수요도2073년.청제작물갈간화근계대우소제토양 As 오염유익,우기시원기효과명현,이표층토양적류실대우토양 As적청제작용현저.
The sewage irrigation has a soil environmental problem which urgent to be solved. Studying the condition and the trend of soil heavy metal pollution in sewage irrigation area has practical significance to the remedy of heavy metals soil pollution. A case of Kuihe River sewage irrigation was studied, and the relevant data through the collection of literature data and field monitoring were obtained. By both the single factor index method and Nemerow multi-factor index method, the pollution indices were calculated for assessing pollution extent. The results showed that the soil was mild contamination of As. The As content of 89.93% paddy field samples and 82.39% upland soil samples exceed the state soil environment quality standard grade two, paddy field comprehensive pollution index was 1.39 and upland soil was 1.19. The results showed that in the current planting system, it would take a long time to eliminate the As in the soil. The As content would be reduced to less than 30 mg/kg in 2016, 25mg/kg in 2024, and achieve the local soil background of As in 2073. It is benefit to eliminate the As in the soil by clearing the crop straws and roots, especially the long-term results. The loss of surface soils also work remarkable to eliminate the As in the farmland soil. The study provides a reference for analyzing the changes of As content by system dynamics approach.