| Atmospheric transport of urban-derived NH(x): Evidence from nitrogen concentration and delta(15)N in epilithic mosses at Guiyang, SW China | |
| Xue-Yan Liu; Hua-Yun Xiao; Cong-Qiang Liu; You-Yi Li; Hong-Wei Xiao | |
| 2008 | |
| Source Publication | Environmental Pollution》 , 2008 , 156 (3) :715-22
 |
| Volume | 156Issue:3Pages:715-722 |
| Abstract | Nitrogen concentration and δ15N in 175 epilithic moss samples were investigated along four directions from urban to rural sites in Guiyang, SW China. The spatial variations of moss N concentration and δ15N revealed that atmospheric N deposition is dominated by NHx-N from two major sources (urban sewage NH3 and agricultural NH3), the deposition of urban-derived NHx followed a point source pattern characterized by an exponential decline with distance from the urban center, while the agricultural-derived NHx was shown to be a non-point source. The relationship between moss N concentration and distance (y = 1.5e−0.13x + 1.26) indicated that the maximum transporting distance of urban-derived NHx averaged 41 km from the urban center, and it could be determined from the relationship between moss δ15N and distance [y = 2.54 ln(x) − 12.227] that urban-derived NHx was proportionally lower than agricultural-derived NHx in N deposition at sites beyond 17.2 km from the urban center. Consequently, the variation of urban-derived NHx with distance from the urban center could be modeled asy = 56.272e−0.116x − 0.481 in the Guiyang area. |
| Keyword | Atmospheric n Deposition Nitrogen Isotope Moss Ammonium City Area Nhx Nox |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/6751 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Xue-Yan Liu,Hua-Yun Xiao,Cong-Qiang Liu,et al. Atmospheric transport of urban-derived NH(x): Evidence from nitrogen concentration and delta(15)N in epilithic mosses at Guiyang, SW China[J]. Environmental Pollution》 , 2008 , 156 (3) :715-22,2008,156(3):715-722. |
| APA | Xue-Yan Liu,Hua-Yun Xiao,Cong-Qiang Liu,You-Yi Li,&Hong-Wei Xiao.(2008).Atmospheric transport of urban-derived NH(x): Evidence from nitrogen concentration and delta(15)N in epilithic mosses at Guiyang, SW China.Environmental Pollution》 , 2008 , 156 (3) :715-22,156(3),715-722. |
| MLA | Xue-Yan Liu,et al."Atmospheric transport of urban-derived NH(x): Evidence from nitrogen concentration and delta(15)N in epilithic mosses at Guiyang, SW China".Environmental Pollution》 , 2008 , 156 (3) :715-22 156.3(2008):715-722. |
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