Characteristics of phosphate adsorption onto granulated coal ash in seawater

Marine Pollution Bulletin 60 巻 8 号 1188-1192 頁 2010-08 発行
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タイトル ( eng )
Characteristics of phosphate adsorption onto granulated coal ash in seawater
作成者
収録物名
Marine Pollution Bulletin
60
8
開始ページ 1188
終了ページ 1192
抄録
The deterioration of sediments is a serious environmental problem. Controlling nutrient release fluxes from sediments is important to alleviating eutrophication and to reducing terrigenous nutrient loads. The purpose of this study was to evaluate the phosphate removal performance of granulated coal ash (GCA) from seawater, which is produced from coal thermal electric power generation. Batch experiments were carried out to investigate the removal kinetics of phosphate from seawater under both oxic and anoxic conditions. Phosphate was removed well from seawater under both oxic and anoxic conditions. The adsorption isotherm for phosphate revealed that GCA could remove phosphate effectively from seawater above a concentration of 1.7 mu mol L-1. GCA can reduce the concentration of phosphate in seawater effectively under anoxic conditions where iron type adsorbents cannot be applied. Therefore, GCA could potentially be used to adsorb phosphate in the organically-enriched sediment, which generally occurs under highly reductive conditions.
著者キーワード
Adsorption
Calcium phosphate
Coal ash
Eutrophication
Phosphate
Sediment
NDC分類
地球科学・地学・地質学 [ 450 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Pergamon Elsevier Science Ltd
発行日 2010-08
権利情報
Copyright (c) 2010 Elsevier Ltd
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0025-326X
[DOI] 10.1016/j.marpolbul.2010.03.032
[NCID] AA00721620
[DOI] http://dx.doi.org/10.1016/j.marpolbul.2010.03.032