| 摘要: |
| 【目的】研究陕西省眉县与周至县猕猴桃果园土壤重金属含量，并对其污染风险进行评价。【方法】于2012-10，在陕西猕猴桃主产区眉县和周至县10个猕猴桃果园采集40个土壤样品，采用电感耦合等离子质谱法（ICP-MS）测定铬、铜、砷、镉、汞与铅含量，并计算各重金属元素的单因子污染指数和综合污染指数。【结果】眉县土壤中铬、铜、砷、镉、汞与铅含量平均值分别为（77.68±8.84），（42.39±6.19），（29.12±1.56），（0.18±0.02），（0.054±0.017）与（7.03±2.46） mg/kg；周至县土壤中铬、铜、砷、镉、汞与铅含量平均值分别为（87.86±5.86），（50.02±6.57），（21.48±3.57），（0.22±0.10），（0.049±0.006）与（3.87±2.55） mg/kg。眉县5个猕猴桃园土壤样品中砷含量超标，周至县1个猕猴桃果园土样中砷含量超标。眉县猕猴桃果园土壤中重金属单因子污染指数排序为砷＞铬＞镉＞铜＞汞＞铅；周至县猕猴桃果园土壤中重金属单因子污染指数排序为砷＞镉＞铬＞铜＞汞＞铅。眉县和周至县猕猴桃果园土壤重金属综合污染指数分别为0.86和0.65。【结论】眉县猕猴桃果园土壤重金属污染水平属尚清洁等级，污染等级为警戒级；周至县猕猴桃果园土壤重金属污染水平属清洁等级，污染等级为安全，土壤环境质量合格。 |
| 关键词: 猕猴桃果园 土壤重金属 污染风险 陕西省 |
| DOI： |
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| 基金项目:国家“十二五”科技支撑计划项目（2012BAK17B06） |
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| Concentrations of soil heavy metals in kiwi fruit orchards in Shaanxi and risk evaluation |
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LI Xiao-tong,YUE Tian-li,HU Zhong-qiu,et al
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| Abstract: |
| 【Objective】The study investigated concentrations of soil heavy metals in kiwi fruit orchards in Shaanxi and evaluated the contamination risk.【Method】Concentrations of Cr,Cu,As,Cd,Hg and Pb in 40 soil samples from kiwi fruit orchards in Meixian County and Zhouzhi County in Shaanxi were determined in October 2012 using ICP-MS method.Then the single factor pollution index of each heavy metal and the aggregate pollution index were calculated.【Result】The contents of Cr,Cu,As,Cd,Hg and Pb in Meixian County were (77.68±8.84),(42.39±6.19),(29.12±1.56),(0.18±0.02),(0.054±0.017),and (7.03±2.46) mg/kg,respectively while in Zhouzhi County they were (87.86±5.86),(50.02±6.57),(21.48±3.57),(0.22±0.10),(0.049±0.006),and (3.87±2.55) mg/kg,respectively.Contents of As were above the permitted level in 5 samples from Meixian County and one sample from Zhouzhi County.The single factor pollution indexes of heavy metals in Meixian County were in decreasing order of As＞Cr＞Cd＞Cu＞Hg＞Pb and the order in Zhouzhi County was As＞Cd＞Cr＞Cu＞Hg＞Pb.The aggregate pollution indexes in Meixian County and Zhouzhi County were 0.86 and 0.65,respectively.【Conclusion】The pollution level in Meixian County was clean within the warning level while the level in Zhouzhi County was clean within the safe level. |
| Key words: kiwi fruit orchards soil heavy metal pollution risk Shaanxi Province |
