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| 1 | Effect of temperature on the sorption and desorption of perfluorooctane sulfonate on humic acid显示文摘Sorption and desorption of perfluorooctane sulfonate (PFOS) on humic acid at different temperatures were studied. It was found that the sorption process could be modeled with power kinetic equation very well, suggesting that diflusion predominated the sorption of PFOS on the humic acid. The sorption capacity was doubled when the temperature increased from 5 to 35°C, and thermodynamics parameters △G0 was calculated to be -7.11 to -5.04 kJ/mol, △H0 was 14.2 kJ/mol, and △S 0 was 69.5 J/(mol·K), indicating that the sorption was a spontaneous, endothermic, and entropy driven process. Desorption hysteresis occurred at all studied temperatures which suggested that humic acid may be an important sink of PFOS in the environment. | Chengxia Jia, Chun You, Gang Pan State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. | 2010 | Journal of Environmental Sciences2010，22，3： | 10 |
| 2 | Excess polonium-210 in the coastal atmosphere originating from marine biogenic material显示文摘The depositional fluxes of atmospheric polonium-210 were measured at one site in Xiamen from August 2001 to March 2002. With predominant marine air mass, the depositional fluxes of atmospheric polonium-210 ranged from 0.01 to 0.09 Bq/(m 2 ·d), with an average of 0.04 Bq/(m 2 ·d). The seasonal pattern showed elevated polonium-210 fluxes in summer and autumn rather than in winter. Atmospheric depositional fluxes of polonium-210 showed a good correlation with beryllium-7 (r 2 =0.85) and lead-210 fluxes (r 2 =0.71), indicating their similar removal mechanism from atmosphere. The relationship between the polonium-210 depositional fluxes and the precipitation amount demonstrated that the precipitation dominates the polonium-210 removal from the atmosphere. The observed high activity ratios of polonium-210 to lead-210 indicated the occurrence of excess polonium-210 in coastal atmosphere, which may originate from marine surface waters either by indirect (foam), or more likely, direct (air-sea exchange) input of marine biogenic material into the atmosphere. This source is even more important than the in situ decay of lead-210. | YANG Weifeng CHEN Min HUANG Yipu LIU Guangshan JIA Chengxia | 2006 | Acta Oceanologica Sinica2006，25，6： | 3 |
| 3 | Effect of cationic and anionic surfactants on the sorption and de- sorption of perfluorooctane sulfonate (PFOS) on natural sediments 显示文摘 | Pan Gang Jia Chengxia Zhao Dongye | 2009 | Environmental Pollution2009，157，32： | 1 |
| 4 | Effect of salinity and sediment characteristics on the sorption and desorp- tion of perfluorooctane sulfonate at sediment-water in- terface 显示文摘 | You Chum Jia Chengxia Pan Gang | 2010 | Environmental Pollution2010，158，5： | 1 |
| 5 | Effect of cationic and anionic surfactants on the sorption and desorption of perfluorooctane sulfonate (PFOS) on natural sediments显示文摘 | Gang Pan Chengxia Jia Dongye Zhao | 2009 | Environmental Pollution2009，，157： | 1 |
| 6 | Effect of cationic and anionic surfactants on the sorption and desorption of perfluorooctane sulfonate (PFOS) on natural sediments显示文摘 | Pan Gang Jia Chengxia Zhao Dongye | 2009 | Environmental Pollution2009，157，： | 1 |
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