摘要
【目的】通过对新疆典型重金属区域(奎屯市123团和127团、乌鲁木齐县六十户乡)土壤进行布点调查采样并测定重金属As和Cd含量,研究目前该区域的重金属含量及分布状况,并对其安全性进行评价。【方法】采用污染指数法和潜在风险指数法,对新疆奎屯市、乌鲁木齐县六十户乡典型农田土壤重金属区域代表性土壤进行重金属、生态风险评价。【结果】乌鲁木齐县六十户乡重金属As和Cd的平均值和背景值的比值小于1,低于新疆土壤背景值。奎屯市123团和127团的6个样点的重金属As的平均值和背景值的比值为1.91,高于新疆土壤背景值。重金属Cd的平均值和背景值的比值为0.92,低于新疆土壤背景值。依据食用农产品产地环境质量评价标准,乌鲁木齐县六十户乡以及奎屯市样点2种重金属范围均为Pi≤0.7或者0.7<Pi≤1.0,Px≤0.7,污染水平均为清洁或者尚清洁。乌鲁木齐县六十户乡以及奎屯市样点区均处于低生态风险程度。【结论】新疆乌鲁木齐县六十户乡、奎屯市样点区土壤重金属As和Cd含量均低于食用农产品产地环境质量评价标准,土壤未受到重金属污染。
【Objective】To investigate the content and distribution of heavy metals in typical heavy metal contaminated areas of Xinjiang(Regiment 123 and Regiment 127 in Kuitun City and Sixty Household Township of Urumqi County)and evaluate their safety and risk by sampling and measuring the content of As and Cd in the soil.【Method】The heavy metal pollution and ecological risk of typical soils in typical farmland in Kuitun City and Sixty Household Township of Urumqi County were evaluated by pollution index method and potential risk index method.【Result】The ratio of the mean value of As and Cd to the background value was less than 1,which was lower than the background value of Xinjiang soil.The ratio of the mean value and background value of Heavy metal As in six samples from Regiment 123 and Regiment 127 in Kuitun City was 1.91,which was higher than the background value of Xinjiang soil.The ratio of the mean value of heavy metal Cd to the background value was 0.92,which was lower than the background value of Xinjiang soil.According to the environmental quality evaluation standard of producing area of edible agricultural products,through the single factor pollution index and comprehensive pollution index,it could be seen that the range of the two heavy metals in the samples of Sixty Household Township of Urumqi County and Kuitun City were Pi≤0.7 or 0.7<Pi≤1.0,Px≤0.7,and the pollution level was clean or still clean.Based on the assessment of potential ecological risk of farmland,the sample areas of Sixty Household Township of Urumqi County and Kuitun City were at low ecological risk.【Conclusion】The contents of heavy metal As and Cd in the soils of Sixty Household Township of Urumqi County and Kuitun City,Xinjiang are lower than the environmental quality assessment standard of edible agricultural products producing area,and the soil was not polluted by heavy metals.
作者
刘国宏
冷冰冰
扁青永
魏亚媛
王治国
LIU Guohong;LENG Bingbing;BIAN Qingyong;WEI Yayuan;WANG Zhiguo(Turpan Institute of Agricultural Sciences,Xinjiang Academy of Agricultural Sciences,Turpan Xinjiang 838000,China;Urumqi Environmental Monitoring Center Station,Urumqi 830091,China;Baicheng Agricultural Experimental Station/National Soil Quality Aksu Observation and Test Station,Xinjiang Academy of Agricultural Sciences,Aksu,Xinjiang 843000,China;Research Institute of Soil,Fertilizer and Agricultural Water Conservation,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,China)
出处
《新疆农业科学》
CAS
CSCD
北大核心
2022年第8期2033-2040,共8页
Xinjiang Agricultural Sciences
基金
自治区创新环境(人才、基地)建设专项—资源共享平台建设(PT2110)。
关键词
土壤
重金属
评价
生态风险
soil
heavy metals
assessment
ecological risk
