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CONCENTRATION OF NUTRIENTS IN STREET DUSTS OF MEGA-CITY, CHENGDU, SOUTHWEST CHINA

文献类型： 外文期刊

作者： Zhang, Bin 1 ; Luo, Benfu 1 ; Jiang, Tao 2 ; Mei, Ziliang 1 ;

作者机构： 1.Xihua Univ, Energy & Environm Coll, Chengdu 610039, Peoples R China

2.Chongqing Acad Agr Sci, Chongqing 401329, Peoples R China

关键词： Street dust;carbon;nitrogen;phosphorus;spatial distribution

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.618； 五年影响因子：0.583 ）

ISSN：

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收录情况： SCI

摘要： Concentrations of nutrients including organic matter, total nitrogen, and total phosphorus in 42 street dust samples collected from Chengdu city were measured, and spatial distribution characteristics of these nutrients were investigated. The results showed that the average value of organic matter in the study area was 12.46 +/- 3.78mg/g with a range of 5.21-22.39mg/g, total nitrogen was 1.24 +/- 0.30mg/g with a range of 0.73-2.13mg/g, and total phosphorus was 0.73 +/- 0.13mg/g with a range of 0.54-1.09mg/g. It was found that the spatial patterns of organic matter, total nitrogen and total phosphorus are rather similar and showed large spatial variation. Results of C/N analysis showed that organic matter in street dusts derived mainly from sedimentation of biomass. The organic matter, total nitrogen, and total phosphorus were significantly and positively correlated, which indicates that they are probably derived from the same source. Nitrogen and phosphorus in street dusts of Chengdu could become potential pollution sources. Therefore, more attention should be paid to the potential impact of nitrogen and phosphorus in street dusts on the receiving water bodies' eutrophication. Data analysis showed that single standard indices of total nitrogen range from 1.77 and 2.82 and are all above I, which indicates that the nitrogen pollution is relatively serious. However, the content of total phosphorus is relatively low, with standard indices ranging from 0.97 to 1.40, indicating that the phosphorus pollution is not very serious.

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