摘要
土壤质量评价是了解土壤污染状况,完善土壤管理制度的有效途径。本文旨在研究主要污染物对土壤质量的影响,进一步分析土壤对地下水的影响。以淄博市大武水源地为研究区,运用综合分析法和对比法,分析近十年土壤改善情况,探讨土壤和地下水之间的联系。结果表明,研究区内土壤质量整体较好,无较高污染风险Ⅲ类土壤,以污染风险低的Ⅰ类土壤为主,风险可控的Ⅱ类质量土壤主要分布在最表层,垂向上污染物存在向下迁移现象。土壤重金属以Hg、Cd、Pb为主,具有一致性、同源性;有机物污染最严重的是多环芳烃类,其次是二氯甲烷,主要来源于周边化工厂以往所排放的污废水。本次调查的苯浓度有了大幅度减低,均未检出,重金属Cd污染增加。土壤中污染物向下迁移影响了地下水水质,近10年来地下水和土壤质量虽有所改善,但大武水源地土壤中污染物仍对地下水水质产生持续影响。本次研究对淄博市大武水源地土壤质量的分类和界定,提高水土生态健康具有重要意义。
Soil quality evaluation is an effective way to study present condition of soil pollution and to perfect management system.This paper aims to study the impact of major pollutants of soil quality and analyze the impact of soil on groundwater.Taking Dawu water source in Zibo city as the study area,by using comprehensive analysis and comparison methods,the situation of soil improvement in the past ten years have been analyzed,and the relationship between soil and groundwater has been explored.It is showed that the overall soil quality in the study area is good,there is no high pollution riskⅢtype of soil,and main soil is the low pollution risk ofⅠtype.TheⅡquality soil with controllable risk is mainly distributed in the topmost layer,and the vertical pollutants migrate downward.The soil heavy metal is mainly Hg,Cd and Pb,with consistency and homology.The most serious organic pollution is polycyclic aromatic hydrocarbons,followed by dichloromethane,which mainly comes from the waste water discharged by the surrounding chemical plants.In this investigation,the concentration of benzene has been greatly reduced,and the heavy metal Cd pollution has increased without being detected.The downward migration of pollutants in the soil has affected the quality of groundwater.The quality of groundwater and soil have improved in the past 10 years,however,the pollutants in the soil of Dawu water source still have a continuous impact on the quality of groundwater.This study is significant to the classification and definition of soil quality in Dawu water source area in Zibo city,and to improve the ecological health of water and soil.
作者
李双
刘治政
杨丽芝
朱恒华
刘柏含
郭艳
LI Shuang;LIU Zhizheng;YANG Lizhi;ZHU Henghua;LIU Baihan;GUO Yan(Shandong Institute of Geological Surveying, Shandong Ji'nan 250014, China)
出处
《山东国土资源》
2021年第12期65-72,共8页
Shandong Land and Resources
基金
淄博市政府财政资金资助项目,淄博市大武水源地三维可视化信息系统建设(ZBGK2017100)。
关键词
土壤质量评价
重金属
地下水
大武水源地
淄博市
Soil quality evaluation
heavy metal
underground water
Dawu groundwater source
Zibo city
