中国科学院东北地理与农业生态研究所机构知识库
Advanced  
NEIGAE OpenIR  > 湿地与全球变化学科组  > 期刊论文
Title: Thin ferrihydrite sediment capping sequestrates phosphorus experiencing redox conditions in a shallow temperate lacustrine wetland
Author: Y. C. Zou, M. R. Grace, K. L. Roberts and X. F. Yu
Corresponding Author: 于晓菲
Source: Chemosphere
Issued Date: 2017
DOI: 10.1016/j.chemosphere.2017.07.052
Volume: 185, Pages:673-680
Abstract: Synthesized ferrihydrite (Fh) with the dosages of 0.3, 0.6 and 0.9 cm thickness (labeled as Fh, 2Fh and 3Fh respectively, equivalent to 248-774 g/m(2)) were deployed to serve as the reactive capping layer covering the Ornamental Lake sediments, the Royal Botanic Garden of Melbourne. The sediments were exposed to an alternating regime of oxic/anoxic conditions using laboratory reactors for 45 days. Dynamics of disSolved oxygen (DO), pH, filterable reactive phosphorus (FRP), filterable ammonium (NHS'), nitrate and nitrite (NOx), total dissolved nitrogen (TDN) and dissolved iron (Fe) of overlying water were examined. After incubation, O-2 and H2S profiles across the water-sediment interface were observed with microelectrodes. The element distributions in the upper sediments were tested as well. Results showed that DO and pH kept relatively stable during oxic period, while decreased significantly during anoxic period. Fh cappings decreased both DO and pH, and inhibited the release of FRP. No significant increments of FRP in overlying waters were observedduring anoxic period. Fh cappings prompted the releases of NH4+ and TDN, while inhibited that of NO(x center dot)NH(4)(+)increased while NOx decreased during anoxic period. Fe(II) and TFe increased only in 3Fh, especially during anoxic conditions. Fh cappings increased O-2 and H2S concentrations across the water-sediment interfaces. TP and TN in the sediments decreased after capping, while TFe increased significantly. We concluded that 0.6 cm thickness of (496 g/m(2)) Fh capping could sequestrate P, even experiencing redox conditions. (C) 2017 Elsevier Ltd. All rights reserved.
WOS ID: WOS:000408597300077
Citation statistics:
Content Type: 期刊论文
URI: http://ir.iga.ac.cn/handle/131322/7566
Appears in Collections:湿地与全球变化学科组_期刊论文

Files in This Item:

There are no files associated with this item.

Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Y. C. Zou, M. R. Grace, K. L. Roberts and X. F. Yu]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Y. C. Zou, M. R. Grace, K. L. Roberts and X. F. Yu]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace