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Free atmospheric phosphine concentrations and fluxes in different wetland ecosystems, China |
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| Authors: | Han Chao Geng Jinju Hong Yuning Zhang Rui Gu Xueyuan Wang Xiaorong Gao Shixiang Glindemann Dietmar |
| Institution: | a State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China b School of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China c Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA |
| Abstract: | Atmospheric phosphine (PH3) fluxes from typical types of wetlands and PH3 concentrations in adjacent atmospheric air were measured. The seasonal distribution of PH3 in marsh and paddy fields were observed. Positive PH3 fluxes are significantly related to high air temperature (summer season) and increased vegetation. It is concluded that vegetation speeds up the liberation of PH3 from soils, while water coverage might function as a diffusion barrier from soils or sediments to the atmosphere. The concentrations of atmospheric PH3 (ng m−3) above different wetlands decrease in the order of paddy fields (51.8 ± 3.1) > marsh (46.5 ± 20.5) > lake (37.0 ± 22.7) > coastal wetland (1.71 ± 0.73). Highest atmospheric PH3 levels in marsh are found in summer. In paddy fields, atmospheric PH3 concentrations in flourishing stages are higher than those in slowly growing stages. |
| Keywords: | Phosphine gas Flux Atmospheric concentration Migration Wetland ecosystems |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ | |