摘要
研究福建省东部代表性区域内农用地镉(Cd)污染现状和发展趋势并进行风险程度分析,以期为福建省东部地区农用地土壤Cd治理和农产品质量安全提供技术支撑。采集福建省东部农用地(水田329个、蔬菜地78个、果园41个、茶园47个)共495个土壤样品,采用石墨炉原子吸收法测定土壤中的Cd含量,利用内梅罗污染指数法和潜在生态风险指数法等评价方法,对福建省东部代表性区域农用地Cd污染情况进行评价。结果表明:福建省东部代表区域农用地Cd累积量大,8个区域农用地重金属总Cd平均值分别为0.227、0.167、0.177、0.162、0.128、0.205、0.166、0.249 mg·kg^(-1),但有效态含量均低于0.080 mg·kg^(-1),呈轻度污染,能够流入食物链的Cd量较少。由于地区间差异性显著,且单个区域内总Cd和有效Cd含量均呈现上升趋势,生态风险较强。
The present situation and development trend of cadmium(Cd)pollution in agricultural land in the representative regions of eastern Fujian were studied and the risk degree was analyzed,in order to provide technical support for the Cd control in agricultural land soil and the quality safety of agricultural products in eastern Fujian.A total of 495 soil samples were collected from the agricultural lands in eastern Fujian(329 paddy fields,78 vegetable fields,41 orchards,and 47 tea gardens).The content of Cd in soil was determined by using the method of graphite furnace atomic absorption spectrometry.Then,the Cd pollution of agricultural lands in the representative regions of eastern Fujian was evaluated by using the Nemerow pollution index method and potential ecological risk index method.The results showed that the accumulation of Cd in agricultural lands was large in the representative regions of eastern Fujian.The mean values of total Cd of heavy metals in agricultural lands of the eight regions were 0.227,0.167,0.177,0.162,0.128,0.205,0.166 and 0.249 mg·kg^(-1),respectively,but the effective state contents were all lower than 0.080 mg·kg^(-1),indicating slight contamination and a small amount of Cd that could flow into the food chain.Because of the significant differences among regions,and the increasing trend of total Cd and available Cd contents in a single region,the ecological risk was strong.
作者
滕英
陈金凤
张宇豪
张雅嫆
唐庆强
TENG Ying;CHEN Jin-feng;ZHANG Yu-hao;ZHANG Ya-rong;TANG Qing-qiang(China Certification & Inspection Group Fujian Co., Ltd., Fuzhou, Fujian 350015, China;College ofEco-Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China;Technology Center of Fuzhou Customs District, Fuzhou, Fujian 350001, China)
出处
《福建农业科技》
CAS
2021年第11期80-86,共7页
Fujian Agricultural Science and Technology
基金
福建省自然科学基金项目(2018J05039)
福建工程学院科研启动基金(GY-Z20166)。
关键词
土壤
重金属
镉
污染状况调查
风险评价
Soil
Heavy metals
Cadmium
Pollution investigation
Risk assessment
