化工企业土壤中多环芳烃分布特征及影响因素  

Distribution Characteristics and Influencing Factors of Polycyclic Aromatic Hydrocarbons in Soil of Chemical Enterprises

作　　者：王小艳 吕慧捷[1,2] 袁京周 王欣 WANG Xiaoyan;LYU Huijie;YUAN Jingzhou;WANG Xin(College of Resources and Environment,Bayin Guoleng Vocational and Technology College,Korla 841000,China;Xinjiang Key Laboratory of Sustainable Management of Salinized Land and Regional Agricultural Technology,Korla 841000,China;College of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]巴音郭楞职业技术学院,资源与环境学院,新疆库尔勒841000 [2]新疆盐渍化耕地安全利用及特色农业技术重点实验室,新疆库尔勒841000 [3]河北科技大学环境科学与工程学院,河北石家庄050018

出　　处：《环境科学与技术》2025年第4期153-160,共8页Environmental Science & Technology

基　　金：河北省重点研发计划项目(19273813D)。

摘　　要：该文以化工企业典型的多环芳烃(PAHs)污染土壤为研究对象,对不同深度土壤中PAHs进行定量分析,研究土壤中PAHs的纵向分布特征及影响因素。结果表明,研究区域土壤中PAHs主要富集在表层土壤,随土壤深度的增加,浓度呈现出先降低后稳定的趋势。不同环数PAHs在土壤中的分布差异较大,表层土壤以中高环(4~6)PAHs为主,占60%~83%,而深层土壤中低环(2~3)PAHs占比较高,为63%~92%。5个点位中PAHs含量与TOC的相关系数分别为0.825、0.944、0.937、0.955和0.931,呈现出显著的正相关性,且中高环PAHs与TOC相关性高于低环PAHs。土壤黏粒具有比表面积大、孔容大及孔径小的特点,可以吸附和固定TOC形成土壤团聚体,增强土壤对污染物的吸附能力,对PAHs的纵向迁移起到阻滞和截留作用。文章填补了化工企业PAHs分布与土壤粒径相关性研究的空白,为后续研究提供了新的数据和理论支持。Taking typical PAHs-contaminated soil in a chemical enterprise as the research object,PAHs in soil of different depths were quantitatively analyzed,and the longitudinal distribution characteristics and influencing factors of PAHs in soil were studied.The results showed that PAHs were mainly enriched in the surface soil,and showed a trend of first decreasing and then stabilizing with increasing soil depth.The distribution of PAHs in soil with different ring numbers varied greatly.The top soil was dominated by middle and high ring(4~6)PAHs,accounting for 60%~83%,while the deep soil was dominated by low ring(2~3)PAHs,accounting for 63%~92%.The correlation coefficients between PAHs content and TOC at the five sites were 0.825,0.944,0.937,0.955 and 0.931,respectively,showing a significant positive correlation,and the correlation between middle and high cyclic PAHs and TOC was higher than that between low cyclic PAHs.The clay particles in soil have the characteristics of large specific surface area,large pore volume,and small pore diameter,which can adsorb and fix TOC to form soil aggregates,enhance the soil's ability to adsorb pollutants,and play a role in blocking and retaining PAHs in the vertical migration.This paper fills the gap in the study of the correlation between PAHs distribution and soil particle size in chemical enterprises,and provides new data and theoretical support for subsequent research.

关 键 词：化工企业 土壤 多环芳烃 分布特征 影响因素 

分 类 号：X53[环境科学与工程—环境工程]