蚌埠市农田土壤重金属含量分析及生态风险评价
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摘要
为了解蚌埠市农田土壤中重金属的含量特性,从野外采集51个土壤样品,利用火焰原子吸收分光光度法测量土壤中Cu、Zn、Cr、Pb的含量。研究结果显示,相较于土壤环境质量二级标准,蚌埠市农田土壤中4种重金属元素平均含量均未超标,Cu元素略超过当地土壤元素背景值。潜在生态风险指数的结果显示研究区域内四种重金属均处于轻微污染等级。整体来看,四种重金属对农田土壤具有较小的生态风险。
In order to understand the heavy metal concentrations in farmland soil from Bengbu city,51 soil samples were collected from the field and the contents of Cu,Zn,Cr and Pb in the soil were measured by flame atomic absorption spectrometry. Compared with the secondary standard of soil environmental quality,the average content of 4 heavy metal elements of the farmland soil did not exceed the standard,and Cu slightly exceeded the background value. The results of the potential ecological risk index indicated that the pollution level of four heavy metals in this study area were slight. Four heavy metals posed little ecological risk to the farmland soil.
In order to understand the heavy metal concentrations in farmland soil from Bengbu city,51 soil samples were collected from the field and the contents of Cu,Zn,Cr and Pb in the soil were measured by flame atomic absorption spectrometry. Compared with the secondary standard of soil environmental quality,the average content of 4 heavy metal elements of the farmland soil did not exceed the standard,and Cu slightly exceeded the background value. The results of the potential ecological risk index indicated that the pollution level of four heavy metals in this study area were slight. Four heavy metals posed little ecological risk to the farmland soil.
引文
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[10] Li J,Zheng C,Guo X. Manual data of environmental background value[M]. Beijing:China Envrionment Science Press,1989.
[11]朱兰保,盛蒂,戚晓明,等.蚌埠龙子湖底泥重金属污染及生态风险评估[J].安全与环境学报,2013,13(5):107-111.
[2]尤冬梅.农田土壤重金属污染监测及其空间估值方法研究[D].北京:中国农业大学,2014.
[3] Muller G. Index of geoaccumulation in sediments of the Rhine River[J]. Geojournal,1969(2):108-118.
[4]周秀艳,王恩德.辽东湾潮间带底质重金属污染地累积指数评价[J].安全与环境学报,2004,4(2):72-82.
[5]涂剑成,赵庆良,杨倩倩.东北地区城市污水处理厂污泥中重金属的形态分布及其潜在生态风险评价[J].环境科学学报,2012,33(3):689-695.
[6]张江华,赵阿宁,王仲复,等.内梅罗指数和地质累积指数在土壤重金属评价中的差异探讨——以小秦岭金矿带为例[J].黄金,2010,8(8):43-46.
[7] Chowdhury R,Favas P J,Pratas J,et al. Accumulation of trace metals by mangrove plants in Indian Sundarban Wetland:prospects for phytoremediation[J]. Int. J. Phytoremediation,2015,17:885-894.
[8] Hakanson L. An ecological risk index for aquatic pollution control:A sedimentological appproach[J]. Water Research,1980,14(8):975-1001.
[9]徐争启,倪师军,庹先国,等.潜在生态危害指数法评价中重金属毒性系数计算[J].环境科学与技术,2008,31(2):112-114.
[10] Li J,Zheng C,Guo X. Manual data of environmental background value[M]. Beijing:China Envrionment Science Press,1989.
[11]朱兰保,盛蒂,戚晓明,等.蚌埠龙子湖底泥重金属污染及生态风险评估[J].安全与环境学报,2013,13(5):107-111.