QQ客服 官方微博 反馈留言

	Temporal variability of iron concentrations and fractions in wetland waters in sanjiang plain, northeast china
	Pan, Xiaofeng1,2; Yan, Baixing1; Yoh, Muneoki3; Wang, Lixia1; Liu, Xiuqi1
刊名	Journal of environmental sciences-china
	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
出版者	SCIENCE PRESS
WOS记录号	WOS:000280163800003
内容类型	期刊论文
URI标识	http://www.corc.org.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.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。