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| 昆明市街道灰尘重金属污染及潜在生态风险评价 | |
| 引用本文： | 梁涛,史正涛,吴枫,谷晓梅.昆明市街道灰尘重金属污染及潜在生态风险评价[J].热带地理,2011,31(2). |
| 作者姓名： | 梁涛 史正涛 吴枫 谷晓梅 |
| 作者单位： | 1. 云南师范大学,旅游与地理科学学院,昆明,650092;安徽省淮北师范学校,安徽,淮北,235100 2. 云南师范大学,旅游与地理科学学院,昆明,650092 3. 中科院地球环境研究所,西安,710075 |
| 基金项目： | 云南省教育厅科学研究基金项目(08Z0023) |
| 摘 要： | 利用X-Ray荧光光谱仪对昆明市街道灰尘的Cu、Zn、Pb、As、Cr和Ni等元素进行了分析,讨论了街道灰尘中重金属含量的水平和空间分布特征;采用潜在生态危害指数法对灰尘中重金属的潜在生态风险进行了评价。结果表明:昆明市街道灰尘中重金属Cu、Zn、Pb、As、Cr和Ni的平均含量分别为166.6、316.53、97.49、20.56、79.41和21.45 mg/kg,与全国土壤背景值相比有较大积累,其中Cu、Zn、Pb和As都达到相对富集类,污染程度较重;重金属元素在旱季有明显积累趋势,雨季相对降低;重金属在工业区含量最高,其次为交通区,其中内城重金属污染源主要来自于汽车交通污染,外城来源于工业污染。灰尘中重金属潜在生态风险处于轻微生态危害水平,且潜在生态风险系数大小顺序为Cu>Zn>As>Pb>Cr>Ni,其中Cu是最主要的生态风险因子。 |
| 关 键 词： | 街道灰尘 重金属 潜在生态风险 昆明 |
Heavy Metal Pollution and the Ecological Risk Assessment of Urban Street Dust in Kunming |
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| LIANG Tao,SHI Zhengtao,WU Feng,GU Xiaomei.Heavy Metal Pollution and the Ecological Risk Assessment of Urban Street Dust in Kunming[J].Tropical Geography,2011,31(2). | |
| Authors: | LIANG Tao SHI Zhengtao WU Feng GU Xiaomei |
| Institution: | LIANG Tao1,2,SHI Zhengtao1,WU Feng3,GU Xiaomei1(1.College of Tourism and Geography Sciences,Yunnan Normal University,Kunming 650092,China,2.Huaibei Normal School,Huaibei 235100,3.Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710075,China) |
| Abstract: | The concentrations of Cu,Zn,Pb,As,Cr and Ni in urban street dust collected from Kunming were analyzed by using X-Ray fluorescence spectrometry.Spatial technique was applied to study the content level and the spatial distribution characteristics of heavy metal pollution in street dust of Kunming.The ecological risks of heavy metals in street dust were assessed with the potential ecological risk index method.The results show that the average concentrations of Cu,Zn,Pb,As,Cr and Ni in the street dust in Kunmin... |
| Keywords: | street dust heavy metals potential ecological risk Kunming |
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