摘要
硒对人体健康有着重要影响。本文以藁城为研究区,利用HG-AFS及ICP-MS等对研究区不同介质中的硒和重金属元素含量进行测试分析,探讨了藁城土壤硒含量特征、主要成因及来源,并对该地生态环境健康进行了评价。结果表明,藁城表层土壤硒均值为0.32 mg/kg,富集系数达到1.68,在研究区南部普遍较高,约171.12 km^(2)达到富硒土壤标准;富硒土壤成因以人为成因为主,主要来源为燃煤和灌溉水;富硒区农产品硒含量远高于非富硒区,部分达到天然富硒食品标准,居民硒摄入量约为123.47 mg/d,处于合理水平;重金属污染程度由高到低依次为Cd>Hg>Pb>Cu>Zn>Ni>As,单项重金属潜在生态风险评价显示Cd和Hg为主要危害元素,其余重金属潜在风险较低;重金属人体健康风险评价表明:研究区非致癌和致癌风险指数均处于安全范围内,口摄入是产生健康风险的主要途径,儿童相较于成人更易受到危害。
Selenium has an important impact on human health.This paper takes Gaocheng as a research object to test and analyze the content of selenium and heavy metal elements in different media in the study area with HG-AFS and ICP-MS method.Based on the discussing of the characteristics,main causes and sources of selenium content in soil,the health of the local ecological environment is evaluated.The results show that the average selenium in the surface soil of Gaocheng is 0.32 mg/kg,and the enrichment coefficient reaches 1.68,which is generally higher in the southern part of the study area,about 171.12 km^(2) reaching the standard of selenium-rich soil.The selenium enrichment in soil is mainly caused by human beings,and its main sources are coal burning and irrigation water.The selenium content of agricultural products in the selenium-rich area is much higher than that in the non-selenium-rich area,part of which meets the natural selenium-rich food standard.The selenium intake of residents is about 123.47 mg/d,which is at a reasonable level.The heavy metal pollution degree is Cd>Hg>Pb>Cu>Zn>Ni>As.The ecological risk assessmen of a single heavy metal t shows that Cd and Hg are the main hazard elements,and the other heavy metal potential risks are low.The human health risk assessment of heavy metals indicates that the non-carcinogenic and carcinogenic risk indexes in the study area are within a safe range,and oral intake is a source of health.Children are more vulnerable to oral intake than adults.
作者
赵燕
栾文楼
郭海全
蔡奎
马忠社
敦妍冉
ZHAO Yan;LUAN Wenlou;GUO Haiquan;CAI Kui;MA Zhongshe;DUN Yanran(Hebei GEO University,Shijiazhuang 050031,Hebei,China;Geological Exploration Technology Center,Hebei Bureau of Geology and Mineral Resources Exploration,Shijiazhuang 050081,Hebei,China;Hebei Institute of Geological Survey,Shijiazhuang 050051,Hebei,China)
出处
《中国地质》
CAS
CSCD
北大核心
2021年第3期764-776,共13页
Geology in China
基金
河北省研究生创新资助项目(CXZZSS2020114)
河北省地质调查院项目([2013]005号(土壤))
河北地质大学第十六届学生科技基金科研项目(KAD201908)联合资助。
关键词
富硒土壤
成因
来源
生态环境健康
藁城
河北省
selenium-enriched soil
causes
sources
ecological and environmental health
Gaocheng
Hebei Province
