农田土壤-植物体系中硝基多环芳烃的赋存特征及风险评价  

Occurrence characteristics and risk assessments of nitro polycyclic aromatichydrocarbons in farmland soil-plant system

作　　者：周庆华 徐泽冰 张安平 孙建强 ZHOU Qinghua;XU Zebing;ZHANG Anping;SUN Jianqiang(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014

出　　处：《浙江工业大学学报》2025年第1期104-110,共7页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(21976160);浙江省自然科学基金资助项目(LY20B070009)。

摘　　要：为探究不同农田土壤-植物体系中硝基多环芳烃(NPAHs)的赋存特征及健康风险,采集普通农田和道路旁农田以及大棚内外农田中的土壤和植物样品,采用GC-MS测定4种典型NPAHs的质量分数。测定结果表明:道路旁农田土壤和植物中NPAHs的质量分数均高于普通农田(p<0.01),其中交通源1-硝基芘(1-NPyr)为特征化合物;大棚外土壤和植物中NPAHs的质量分数均高于大棚内(p<0.05),其中1-NPyr赋存水平存在显著性差异(p<0.05)。植物中NPAHs的富集系数BCF>1,表明植物对土壤中NPAHs具有富集作用。道路旁农田土壤中1-NPyr的毒性质量分数TEQ和终生致癌风险ILCR均高于普通农田,大棚外土壤中1-NPyr的TEQ和ILCR均高于大棚内;各农田环境土壤中1-NPyr的TEQ和ILCR均处于安全水平。This study investigate the occurrence and health risks of nitro polycyclic aromatic hydrocarbons(NPAHs)in different soil-plant systems by collecting soil and plant samples from common farmland,roadside farmland,and farmland inside and outside the greenhouses.The levels of four NPAHs were analyzed by GC-MS.The results showed that the NPAH concentrations in soils and plants from roadside farmland were significantly higher than those from common farmland(p<0.01),with 1-nitropyrene(1-NPyr),primarily originating from traffic source,identified as the characteristic compound.The NPAH levels in soils and plants outside the greenhouses were higher than those inside(p<0.05),and levels of 1-NPyr inside and outside greenhouses were significantly different(p<0.05).The bioconcentration factors(BCF)for NPAHs in plants were greater than one,indicating that NPAHs from soil accumulate in plant tissues.The toxic mass fraction TEQ and incremental lifetime cancer risk ILCR for 1-NPyr in soils from roadside farmland were higher than those from common farmland,while the TEQ and ILCR of 1-NPyr in soils outside the greenhouses were higher than those inside.The TEQ and ILCR of 1-NPyr in soils across all farmland environments remained within safe levels.

关 键 词：硝基多环芳烃 农田土壤 植物 终生致癌风险 

分 类 号：X592[环境科学与工程—环境工程]