CAJ | 학술논문

潜在有毒污染物对人体的暴露及其健康风险是当前环境研究中的一个主要问题.重金属Pb对人体具有较大毒性,为此通过对研究区菜地、稻田、果园、旱地、茶园等5种典型土地利用类型402个土壤和同步采集的作物样品的测试分析,探讨了不同土地利用方式对土壤及其种植作物Pb积累的影响.研究结果表明,不同土地利用方式下,土壤Pb积累的程度不同,菜地土壤Pb积累程度最高,果园土壤Pb积累程度最低.方差分析结果表明.菜地土壤与茶园、果园土壤之间,茶园土壤与菜地、稻田、旱地土壤之间Pb含量存在显著差异性.研究区不同土地利用方式对作物Pb积累的影响较大,水稻Pb平均含量最高,水果Pb平均含量最低.不同作物之间Pb含量也存在显著性差异,水稻Pb含量显著高于其他4种作物,水果和蔬菜Pb含量则远低于其他3种作物.利用定性风险分析技术,对不同土地利用类型下土壤Pb对人体健康的风险商值进行了计算.结果表明,不同土地类型土壤Pb对人体健康的风险商值为稻田>菜地>旱地>果园,尤其是稻田和菜地土壤Pb对人体健康的风险较大,均存在土壤Pb含量对人体健康造成危害、处于不可接受的样点,居民面临较大健康风险,应采取积极措施对这两种土地利用类型下土壤Pb污染进行治理和修复.
잠재유독오염물대인체적폭로급기건강풍험시당전배경연구중적일개주요문제.중금속Pb대인체구유교대독성,위차통과대연구구채지、도전、과완、한지、다완등5충전형토지이용류형402개토양화동보채집적작물양품적측시분석,탐토료불동토지이용방식대토양급기충식작물Pb적루적영향.연구결과표명,불동토지이용방식하,토양Pb적루적정도불동,채지토양Pb적루정도최고,과완토양Pb적루정도최저.방차분석결과표명.채지토양여다완、과완토양지간,다완토양여채지、도전、한지토양지간Pb함량존재현저차이성.연구구불동토지이용방식대작물Pb적루적영향교대,수도Pb평균함량최고,수과Pb평균함량최저.불동작물지간Pb함량야존재현저성차이,수도Pb함량현저고우기타4충작물,수과화소채Pb함량칙원저우기타3충작물.이용정성풍험분석기술,대불동토지이용류형하토양Pb대인체건강적풍험상치진행료계산.결과표명,불동토지류형토양Pb대인체건강적풍험상치위도전>채지>한지>과완,우기시도전화채지토양Pb대인체건강적풍험교대,균존재토양Pb함량대인체건강조성위해、처우불가접수적양점,거민면림교대건강풍험,응채취적겁조시대저량충토지이용류형하토양Pb오염진행치리화수복.
Exposure ofpotential toxic pollutants to human body and the associated health risk is a key problem ofcurrent environmental stud-ies.Lead is a toxic heavy metal that can cause heavy poisonous to human body.Based on a large scale survey oflead concentration in soils and crops under five different land use types in the study area,the accumulation characteristics and potential health risks of lead levels in soils and crops of vegetable field,paddy field,dry land,orchards and tea garden were analyzed.The results showed that the characteristics of soillead accumulation under different land use types were different.with the vegetable field accumulation Pb to the maximum extent and the orchard soil to the least extent.Variance analysis showed that there was significant difference in tea garden and orchard soil,tea garden soil and paddy soil.dry land soil and vegetable soil.Land use greatly affected the accumulation of lead in the crops with the mean lead concentra-tion in rice being the highest and in fruit being the lowest.There were significant differences among the variance.The concentration of lead in rice was significantly higher than those in other four crops.Based on qualitative risk assessment technology,hazard quofients of soil lead to human health in the four different land use types were analyzed.The hazard quotients of crops under different land use type were in an order:paddy>vegetable soil>dry land>orchard.The health risks caused by paddy soil and dry land soil were especially obvious.The health risks caused by the two land use were unacceptable and the people lived in the study area were faced with high health risks.Active measures should be taken to control the soil lead pollution in the study area and soil lead pollution should also be remediated.