|
| 不同城市功能区地表灰尘Pb水平及粒级行为——以贵阳市为例 |
| The Distribution and Its Risk of Pb in Different Functional Area——A Case Study of Guiyang City |
| 投稿时间：2012-02-29 修订日期：2013-04-05 |
| DOI： |
| 中文关键词: Pb;地表灰尘;粒级;城市功能区;贵阳市 |
| 英文关键词: Pb;dust;particle size factions;functional areas;Guiyang |
| 基金项目:国家自然科学基金项目(41161079),贵州省科学技术基金(黔科合J字[2009]2252号)。 |
| 作者 | 单位 | E-mail | | 胡军1, 李晓燕2 | 1. 贵州省环境科学研究设计院, 贵阳 550081
2. 贵州师范大学地理与环境科学学院, 贵阳 550001 | lxyan421@163.com |
|
| 摘要点击次数: 663 |
| 全文下载次数: 0 |
| 中文摘要: |
| 本文以我国西南贵州省会城市贵阳为例,对地表按城市功能分区采集灰尘样品,从不同功能区灰尘Pb总量和不同粒级灰尘Pb含量及贡献两个角度探析城市功能对地表灰尘Pb的影响。研究表明,贵阳市地表灰尘Pb平均含量为93.2 mg/kg。商贸区和交通区地表灰尘Pb离散度较小,工业区和垃圾站地表灰尘Pb分异较大,住宅区、广场和学校灰尘Pb数据离散度处于中间水平。不同功能区地表灰尘Pb水平存在较大差异,工业区地表灰尘Pb含量显著高于商贸区和垃圾站;广场和学校地表灰尘Pb含量显著高于商贸区和交通区;住宅区Pb含量显著高于交通区。城市功能区从功能和地理位置两个方面影响城区地表灰尘Pb水平。各功能区地表灰尘不同粒级颗粒物中Pb含量存在较大差异,但所有区域地表灰尘中<250 μm粒级颗粒物对地表灰尘Pb的贡献基本达到80%。 |
| 英文摘要: |
| In this study, Guiyang City was chosen to study the influence of different functional areas of the city to the level of Pb in dusts by collecting dust samples from different functional areas of the city and analyzing the total Pb in dusts and Pb contents of dusts with different sizes.The result showed that the geometric mean concentration of Pb in dusts of Guiyang was 93.2 mg/kg. Large variations in Pb levels were found in dusts in industrial area and garbage stations, while light variations in commercial area and traffic area. Dusts in industrial area contained significantly higher concentrations of Pb than both in commercial area and garbage stations, and dusts in city square and school area contained significantly higher concentrations of Pb than both in commercial area and traffic area, while dusts in residential area contained significantly higher concentrations of Pb than in traffic area. With respect to street dust particle size, the level of Pb in different functional area were difference, and Pb was primarily associated with middle and coarse particles in most functional area but the contribution of Pb from <250 μm particle size factions were both nearly 80% in all function area. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
