环境保护科学2023，Vol.49Issue(6)：83-88,6.DOI:10.16803/j.cnki.issn.1004-6216.202211020
高浓度污染地块基坑清理效果评估采样布点方案研究
Soil sampling of foundation pits during verification of high-concentration polluted soil remediation
摘要
Abstract
In order to study the applicability about the assessment method and monitoring of digging of contaminated soils which were severely polluted in iron and steel industrial sites,88 soil samples of PAHs from foundation pits were collected.The maximum values of ΣPAHs after digging ranged from 7.80 to 378.25 mg/kg in 9 foundation pits.The rate of over standard of Bap was 34.1%,which caused by coal cinder,tar residue and other solid wastes mainly created from coal combustion.The coefficient of variation of BaP content in soil was 251.1%,the sample data did not follow the distribution pattern tested,statistical analysis methods were restricted if the site was seriously and continuously polluted and the pollution characteristic was obviously heterogeneous in soil.Pearson correlation coefficient between the frequency of expanding excavation and BaP content over standard was 0.95,the two factors had obviously linear correlation.The causes that values exceeded the allowed standard in soil could be divided into two cases which were data exception and digging insufficient.It can take 12.60 mg/kg(BaP content)or 41.7%(exceed ratio)as the standard to choose the implementations of the expanding excavation.关键词
效果评估/基坑清理/多环芳烃/修复目标Key words
verification/digging of foundation pits/polycyclic aromatic hydrocarbons(PAHs)/remediation target分类
资源环境引用本文复制引用
孟祥帅,陶抒远,余佩瑶,李凯华,孔祥科..高浓度污染地块基坑清理效果评估采样布点方案研究[J].环境保护科学,2023,49(6):83-88,6.基金项目
河北省自然科学基金(D2020504003) （D2020504003）
