期刊
WATER RESEARCH
卷 43, 期 6, 页码 1654-1666出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2008.12.050
关键词
Phosphorus; Internal loading; Sediment resuspension; P sorption; Oxic; Littoral; Lake
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Summer Career Placement Program of the Human Resources Development Canada
- Ontario Ministry of Education and Training and the University of Toronto
- General Motors Women in Science and Mathematics scholarship and a University of Toronto
The exchange of phosphorus (P) during the resuspension. of sediments into shallow (oxic) waters of deep stratified lakes is regulated by equilibrium dynamics. In this study, we compared the P-sorption characteristics of sediments from 17 shallow and deep littoral sites in an oligo-mesotrophic lake. Zero Equilibrium P Concentration (EPCo) ranged from 0.2 to 5 mu g P L-1. EPCO did not vary with sediment characteristics, but increased with increasing sediment-to-water ratios(SWR). Buffering capacity also increased with increasing SWR up to 1 g L-1, at which point P concentrations were buffered almost perfectly. Therefore, internal P loading in littoral areas may depend primarily on the intensity and duration of sediment resuspension instead of sediment composition, and is expected to be spatially and temporally patchy. Maximum P-sorption capacity (S-max) varied with chemical composition of the sediments, but was generally low, indicating a limited capacity of littoral sediments to retain external inputs of P. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据