水稻田重金属污染调查及环境风险评价  

Investigation and soil environmental quality assessment on heavy metal pollution of rice fields in jiamusi

作　　者：李永亮[1] 李健[1] 李桂莲[2] 

机构地区：[1]佳木斯市环境保护监测站,黑龙江佳木斯154004 [2]黑龙江大学环境科学与工程系,黑龙江哈尔滨150080

出　　处：《甘肃农业大学学报》2016年第5期95-99,共5页Journal of Gansu Agricultural University

摘　　要：【目的】评价三江平原佳木斯市区域水稻田重金属污染情况及潜在的环境风险.【方法】采用与标准比较,计算变异系数和累积指数等方法,测定、评价监测区域水稻田土壤环境质量.【结果】监测区域57个监测点位、8种重金属含量均低于《土壤环境质量标准》二级标准要求;通过与对照点土壤重金属含量进行对比,水稻田土壤中重金属含量变化相对较小,但汞的变异系数较大（最大值0.744）,其他重金属变异系数相对较小（0.028～0.251）,处于中下强度;部分点位重金属出现累积现象,其中镉的累积情况较重（单项累计指数为2.547）,累积程度为镉〉砷〉锌〉镍〉铬〉铅〉汞〉铜.【结论】佳木斯市水稻田环境质量等级为清洁,总体土壤环境质量为良好,未出现重金属污染情况.【Objective】Evaluation of heavy metals pollution in rice fields and potential environmental risks in Three River Plain of Jiamusi City.【Method】Comparing with the standards to calculate the coefficient of variation and cumulative index,evaluated the soil environmental quality of monitoring area paddy field.【Result】57monitoring sites of the monitoring area,8kinds of heavy metal content were lower the‘soil environmental quality standards＇ secondary standard.By comparing the control point on the heavy metal content in soil,we found that though paddy soil heavy metal content in relatively little changes,but the coefficient of variation of mercury had significant（maximum 0.744）,other heavy metals the coefficient of variation showed relatively little（0.028~0.251）,in the middle and lower intensity.In some locations,heavy metal accumulation phenomenon appeared,the accumulation of cadmium reached the maximum（individual cumulative index to 2.547）,the cumulative level was as cadmium〉arsenic〉Zn Ni〉Cr〉PbHg〉Cu.【Conclusion】The environmental quality grade of rice field in Jiamusi City is clean,and the overall quality of the soil environment is good,heavy metal contamination does not occur.

关 键 词：水稻田 重金属污染 环境质量评价 佳木斯 

分 类 号：S159[农业科学—土壤学]