Release of phosphorus from sediments in Lake Biwa

被引：85

作者：

Murphy T. ^{[1
]}

Lawson A. ^{[1
]}

Kumagai M. ^{[2
]}

Nalewajko C. ^{[3
]}

机构：

[1] National Water Research Institute, Environment Canada, Burlington, Ont. L7R 4A6

[2] Lake Biwa Research Institute, Shiga

[3] University of Toronto, Scarboro, Ont.

来源：

Limnology | 2001年 / 2卷 / 2期

关键词：

Eutrophication; Lake Biwa; Phosphorus; Sediments; Vivianite;

D O I：

10.1007/s102010170007

中图分类号：

学科分类号：

摘要：

Two sulfur-mediated reactions are resulting in the eutrophication of Lake Biwa, Japan. The iron (II) phosphate mineral vivianite is dissolving in sulfide-enriched sediments that in places results in porewater concentrations of phosphate exceeding 3 mgl-1. The dissolution of phosphate is evident in profiles of total phosphorus where zones of dissolution and a zone of precipitation in the most oxic surface sediments are visible. At times sulfate reduction in these surface sediments results in pH values as high as 9.9, which can dissolve phosphate adsorbed to iron (III). This release of phosphorus from sediments is at least partially responsible for the recent appearance of blue-green algal blooms. © The Japanese Society of Limnology 2001.

引用

页码：119 / 128

页数：9

共 42 条

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