| 张 建 1 ， 郎咸东 2 ， 陈 蓉 3.贵州六盘水马铃薯种植区土壤重金属含量状况及评价[J].广东农业科学,2015,42(17):6-11 |
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贵州六盘水马铃薯种植区土壤重金属含量状况及评价 |
| Content status and assessment of heavy metals in soilsfrom patato growing areas in Liuzhi， Panxianand Shuicheng counties， Guizhou province |
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| DOI： |
| 中文关键词: 重金属 土壤 风险评价 六盘水 |
| 英文关键词: heavy metals soil risk assessment Liuzhi, Panxian and Shuicheng |
| 基金项目:国家自然科学基金（41463009） |
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| 摘要点击次数: 2243 |
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| 中文摘要: |
| 采集六盘水马铃薯种植区表层土壤样品， 测定 As、 Cd、 Ni、 Cr、 Pb、 Cu 和 Zn 等 7 种重金属含量，
分别采用单因子指数法、 内梅罗指数法、 地累积指数法、 Hakanson 生态风险指数法和污染负荷指数法对表层
土壤中重金属富集状况和生态风险进行评价， 并探讨不同评价方法所得结果的差异性。 结果表明： 六盘水马铃
薯种植区表层土壤 As、 Cd、 Cu、 Ni、 Pb、 Zn 和 Cr 的平均含量分别为 49.46、 1.17、 71.19、 29.96、 27.34、 100.34、13.31 mg/kg， 仅 Cd 元素存在超标现象， 均值超标倍数为 1.95， 样点超标率为 48.49%； 采用内梅罗指数法和Hakanson 生态风险指数法所得评价结果一致， 分区污染程度表现为盘县 > 水城 > 六枝； 采用地累积指数法和 Hakanson 生态风险指数法所得各种重金属富集特征基本一致， 区域不存在 As、 Cr、 Ni、 Pb、 Zn 和 Cu 污染，仅 Cd 为轻微富集； 采用污染负荷指数法得出六盘水马铃薯种植区的污染指数为 0.73， 环境质量分级为“无污染” 。 不同评价方法所得结果存在差异， 建议进行土壤环境质量评价时， 根据研究的侧重点慎重选取不同的评价方法和参考标准。 |
| 英文摘要: |
| The surface soils from patato growing areas in Luizhi， Panxian and Shuichen counties were
sampled and the contents of seven heavy metals including As， Cd， Ni， Cr， Pb， Cu and Zn were measured. The
pollution characteristics and ecological risk of heavy metals were respectively evaluated by means of single factor
index， Nemerow index， geo-accumulation index， Hakanson’ s ecological risk index and pollution load index.
Meanwhile， the differences of different results were compared and explored. The results showed that the contents
of As， Cd， Cu， Ni， Pb， Zn and Cr of surface soils were respectively 49.46， 1.17， 71.19， 29.96， 27.34， 100.34
and 13.31 mg/kg. The contents of As， Cu， Ni， Pb， Zn and Cr were in line with national soil environment quality
standard（level 2） ， but the content of Cd was over standard， moreover， the over standard multiple was 1.95
and the exceeding standard rate of sampling points was 48.49%. Besides， the results of heavy metal pollution
evaluated by Nemerow index and Hakanson’ s ecological risk index reached agreement to three sampling areas，
and the heavy metal pollution degree was Panxia
n>Shuicheng>Liuzhi. In addition，The evaluation
on pollution risk of each heavy metal acquired
general consistence by geo-accumulation index and
Hakanson’ s ecologiacal risk index. As， Cr， Ni， Pb，
Zn and Cu were not polluted，but Cd was slightly
enriched. Finally，the pollution index in patato
7
growing areas evaluated by the mean of pollution load index was 0.73， the environmental quality classification
was non-pollution. The results of different evaluation methods were different. It suggests that different evaluation
methods and reference standards are chosen cautiously according to the research focus when soil environmental
quality is evaluated. |
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