摘要
集约化种植园中植物有害元素的累积会危及人类健康.本研究共采集海南省典型集约化种植园中谷物、蔬菜和水果样品673份.分析了7种重金属(Cu、Pb、Zn、Cr、Cd、As和Hg)的分布特征,并采用单因子指数和内梅罗指数进行污染物评价.同时,结合中国营养学会推荐的日常膳食摄入量,分析重金属的膳食暴露风险.结果表明,673件农作物的Cu、As和Hg含量均低于国家食品限量标准,Pb、Zn、Cr和Cd的超标率分别为2.67%、3.71%、2.53%和3.71%.6类农作物的重金属综合污染程度表现为:叶类蔬菜>薯类>非叶类蔬菜类>豆类>水果>谷类.其中,叶类蔬菜中Cr的风险系数(HQ)显著高于其它类型农作物,并且大于1,表明通过叶类蔬菜摄入重金属具有潜在健康风险.薯类、非叶菜蔬菜类、豆类、水果类和谷类农作物的危害指数(HI)较低,表明这几类农作物更适合集约化生产模式.
The accumulation of some harmful elements in plants from intensive production systems pose a serious threat to human health.In this study,seven heavy metals(Cu,Pb,Zn,Cr,Cd,As,and Hg)and their distribution characteristics in the crops,vegetables,and fruits were analyzed alongside single factor evaluation and Nemero index analysis.Combined with dietary recommended consumption data from the Chinese Nutrition Society,the dietary exposure of heavy metals were further analyzed,and a consequent safety risk assessment was conducted.A total of 673 crop,vegetable,and fruit samples were collected from typical intensive production systems in Hainan Province.The results showed that the content of Cu,As,and Hg in the 673 plant samples was below the value of the national food standard.The exceed rates of Pb,Zn,Cr,and Cd were 2.67%,3.71%,2.53%,and 3.71%,respectively.The heavy metal comprehensive pollution degree of six species of plants showed the trend of leafy vegetables>tuber crops>non-leafy vegetables>legume crops>fruits>cereals.In particular,Cr in leafy vegetables showed significantly higher hazard quotients(HQ)than that in other types,and exceeded 1,suggesting a high potential health risk via the ingestion of heavy metals through leafy vegetables.The relatively lower hazard index(HI)values of tuber crops,non-leafy vegetables,legume crops,fruits,and cereals suggest that these types of plants are more suitable for intensive production systems.
作者
杨剑洲
王振亮
高健翁
严慧
胡树起
唐世新
龚晶晶
YANG Jian-zhou;WANG Zhen-liang;GAO Jian-weng;YAN Hui;HU Shu-qi;TANG Shi-xin;GONG Jing-jing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;Key Laboratory of Geochemical Exploration,Ministry of Natural Resources,Langfang 065000,China;Changsha Mineral Resources Supervision and Inspection Center,Ministry of Land and Resources,Changsha 410007,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第10期4916-4924,共9页
Environmental Science
基金
自然资源部中国地质调查局地质调查项目(DD20190305)。
关键词
重金属
谷物、蔬菜、水果
种植园
健康风险
海南
heavy metals
crops
vegetables
and fruits
plantations
health risks
Hainan
作者简介
杨剑洲(1990~),男,硕士,工程师,主要研究方向为生态地质学,E⁃mail:yjianzhou@mail.cgs.gov.cn;通信作者:龚晶晶,E⁃mail:gjingjing@mail.cgs.gov.cn。
