地质通报2025，Vol.44Issue(12)：2291-2307,17.DOI:10.12097/gbc.2024.02.015
吉林梨树黑土区土壤-农作物中重金属元素富集特征、影响因素及其健康风险评价
Enrichment characteristics,influencing factors,and health risk assessment of heavy metals in soil and crops in the black soil region of Lishu,Jilin Province
摘要
Abstract
[Objective]This study aims to investigate the migration and accumulation characteristics of heavy metals in soil-crop systems and their enrichment patterns in the black soil region of Lishu County,Jilin Province,as well as to assess the health risks posed by soil heavy metals.[Methods]A total of 30 mature rice grain samples,30 corn grain samples,and 60 corresponding root-zone soil samples were systematically collected.Concentrations of heavy metals(Cu,Zn,Cr,Cd,Pb,As,Hg)as well as soil organic matter(SOM)content and pH value were measured.The enrichment characteristics and influencing factors of heavy metals in soils and crops,along with soil heavy metal health risks,were analyzed using the index of geoaccumulation(Igeo),bioconcentration factor(BCF),correlation analysis,and health risk assessment models.[Results]Soils in Lishu County are acidic to neutral with relatively high SOM content.The average concentrations of Cd,Hg,and Cr slightly exceeded the local soil background values,while all seven heavy metals were below the risk screening values.Among crops,Zn had the highest concentration,and Cd and Hg had the lowest,with minor differences in other heavy metal concentrations between rice and corn.Both rice and corn grains showed strong absorption and enrichment capacities for Zn and Cu,but weak capacities for Cd,Cr,Hg,As,and Pb.Correlation analysis revealed that Cu in rice grains was significantly positively correlated with Cu,Zn,and Cd in root-zone soils;Zn in rice grains was positively correlated with Zn,As,and Cd in soils;and Pb in rice grains was positively correlated with Cd in soils.For corn,Zn in grains was significantly positively correlated with Cu,Zn,and Pb in root-zone soils.As and Cr were the main contributors to non-carcinogenic risks,while Cr and As dominated carcinogenic risks.Oral ingestion was identified as the primary exposure pathway for health risks.[Conclusions]The ecological risks of crops in the study area are safe and controllable.Soil pH and SOM are key factors influencing heavy metal concentrations in crops.Soil heavy metals do not pose non-carcinogenic risks to humans,and the carcinogenic risks are within an acceptable range.Overall,soil heavy metal pollution in the region is safe and controllable.关键词
重金属元素/农作物/土壤/影响因素/健康风险评价/吉林Key words
heavy metal elements/crops/soil/bio-concentration factor/health risk assessment/Jilin Province分类
农业科技引用本文复制引用
高远,秦天,侯红星,裴阳,申涛,杨征,周业泽,关雨男..吉林梨树黑土区土壤-农作物中重金属元素富集特征、影响因素及其健康风险评价[J].地质通报,2025,44(12):2291-2307,17.基金项目
中国地质调查局项目《辽河平原梨树地区黑土地地表基质层调查》(编号:DD20211590)、《山西五台-繁峙金多金属矿产调查评价》(编号:DD20242942)Supported by the projects of China Geological Survey"Ground substrate survey in the Lishu area of the Liaohe Plain black soil region"(No.DD20211590),and"Survey and assessment of gold polymetallic deposits in the Wutai-Fanshi area,Shanxi Province"(No.DD20242942) （编号:DD20211590）
