Temporal variability of iron concentrations and fractions in wetland waters in sanjiang plain, northeast china
文献类型：期刊论文
| 作者 | Pan, Xiaofeng1,2; Yan, Baixing1; Yoh, Muneoki3; Wang, Lixia1; Liu, Xiuqi1 |
| 刊名 | Journal of environmental sciences-china
 |
| 出版日期 | 2010 |
| 卷号 | 22期号:7页码:968-974 |
| 关键词 | Iron species Cross-flow filtration Wetland waters Photochemical behavior |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/s1001-0742(09)60206-0 |
| 通讯作者 | Yan, baixing(yanbx@neigae.ac.cn) |
| 英文摘要 | Chemical forms, reactivities and transformation of iron fractions in marshy waters were investigated with cross-flow filtration technique to study the iron environmental behavior. iron fractions were divided into four parts: acid-labile iron (pre-acidification of unfiltered marshy water samples, > 0.7 mu m), high-molecular-weight iron (0.7-0.05 mu m), medium-molecular-weight iron (0.05-0.01 mu m), and low-molecular-weight iron (< 0.01 mu m). the cross-flow filtration suggested that iron primarily exist in both the > 0.7 mu m and < 0.01 mu m size fractions in marshy waters. rainfall is the key for rain-fed wetland to determine fate of iron by changing the aquatic biochemical conditions. by monitoring the variation of iron concentrations and fractions over three years, it was found that dissolved iron and acid-labile iron concentrations exhibit a large variation extent under different annual rainfalls from 2006 to 2008. the seasonal variation for iron species proved that the surface temperature could control some conversion reactions of iron in marshy waters. low-molecular-weight iron would convert to acid-labile iron gradually with temperature decreasing. the photochemical reactions of iron fractions, especially low-molecular-weight iron had occurred under solar irradiation. the relative proportion of low-molecular-weight in total dissolved iron ranging from 28.3% to 43.2% were found during the day time, which proved that the observed decreasing concentration of acid lability iron was caused by its degradation to low molecular weight iron. |
| WOS关键词 | HUMIC SUBSTANCES ; ORGANIC COMPLEXATION ; ELECTRON-ACCEPTORS ; SURFACE WATERS ; REDUCTION ; LIGANDS ; SEAWATER ; PHOTOREDUCTION ; CHEMISTRY ; IRON(III) |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000280163800003 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2414593 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Yan, Baixing |
| 作者单位 | 1.Chinese Acad Sci, NE Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Tokyo Univ Agr & Technol, Fuchu, Tokyo 1838509, Japan |
| 推荐引用方式 GB/T 7714 | Pan, Xiaofeng,Yan, Baixing,Yoh, Muneoki,et al. Temporal variability of iron concentrations and fractions in wetland waters in sanjiang plain, northeast china[J]. Journal of environmental sciences-china,2010,22(7):968-974. |
| APA | Pan, Xiaofeng,Yan, Baixing,Yoh, Muneoki,Wang, Lixia,&Liu, Xiuqi.(2010).Temporal variability of iron concentrations and fractions in wetland waters in sanjiang plain, northeast china.Journal of environmental sciences-china,22(7),968-974. |
| MLA | Pan, Xiaofeng,et al."Temporal variability of iron concentrations and fractions in wetland waters in sanjiang plain, northeast china".Journal of environmental sciences-china 22.7(2010):968-974. |
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来源：中国科学院大学
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