Blast furnace slag can effectively remediate coastal marine sediments affected by organic enrichment

被引：15

作者：

Asaoka, Satoshi ^{[1
]}

Yamamoto, Tamiji ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Biosphere Sci, Higashihiroshima 7398528, Japan

来源：

MARINE POLLUTION BULLETIN | 2010年 / 60卷 / 04期

关键词：

Acid volatile sulfide; Blast furnace slag; Eutrophication; Marine sediment; Phosphate; Remediation; WASTE-WATER; PHOSPHATE; REMOVAL; MECHANISMS; ZEOLITE; METALS; CARBON; MEDIA; RIVER;

D O I：

10.1016/j.marpolbul.2009.11.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

There is an urgent need to control nutrient release fluxes from organically-enriched sediments into overlying waters to alleviate the effects of eutrophication. This study aims to characterize blast furnace slag (BFS) and evaluate its remediation performance on organically-enriched sediments in terms of suppressing nutrient fluxes and reducing acid volatile sulfide. BFS was mainly composed of inorganic substances such as CaO, SiO2, Al2O3 and MgO in amorphous crystal phase. Container experiments showed that the phosphate concentration in the overlying water, its releasing flux from sediment and AVS of the sediment decreased by 17-23%, 39% and 16% compared to the control without BFS, respectively. The loss on ignition was significantly decreased by 3.6-11% compared to the control. Thus, the application of BFS to organically-enriched sediment has a suppressive role on organic matter, AVS concentration and phosphate releasing flux from sediments and therefore, is a good candidate as an effective environmental remediation agent. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：573 / 578

页数：6

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