Remediation of acid mine drainage using metallurgical slags

被引：55

作者：

Name, Tendai ^{[1
]}

Sheridan, Craig ^{[1
]}

机构：

[1] Univ Witwatersrand, Sch Chem & Met Engn, Ind & Min Water Res Unit, ZA-2050 Johannesburg, South Africa

来源：

MINERALS ENGINEERING | 2014年 / 64卷

关键词：

Basic Oxygen Furnace (BOF) slag; Stainless Steel (SS) slag; Acid mine drainage; SOUTH-AFRICA; WETLANDS; REMOVAL; METAL; BASIN;

D O I：

10.1016/j.mineng.2014.03.024

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study basic oxygen and stainless steel slag were both assessed for potential use in treating acid mine drainage. The stainless steel slag was able to effect some pH change but was found to not be suitable. Basic oxygen slag was found to have a significant potential as a remediating agent. For a model acid mine water with a pH of 2.5, sulfate concentration of 5000 mg/L and iron concentration of 1000 mg/L, the slag was able to increase pH to 12.1, reduce the soluble iron by 99.7% and reduce sulfate by 75% in batch experiments. In these batch reactors most reaction was completed within 30 min indicating that this is a rapid process. Additional experiments were conducted with continuous flow reactors to assess the maximum treatment capacity of the slag. These experiments indicated that slag replacement strategies are wholly dependent on the strength of the acid mine drainage, the required residence time and the specified residual concentrations of iron or sulfate and the pH. The data indicate that in particular, basic oxygen furnace slag has significant potential as a replacement reagent for lime in treating acid mine drainage. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：15 / 22

页数：8

共 33 条

[11] An overview of recovery of metals from slags [J].

Shen, HT ;

Forssberg, E .

WASTE MANAGEMENT, 2003, 23 (10) :933-949

[12] Heavy metal removal mechanism of acid mine drainage in wetlands: A critical review [J].

Sheoran, AS ;

Sheoran, V .

MINERALS ENGINEERING, 2006, 19 (02) :105-116

[13] A comparison of charcoal- and slag-based constructed wetlands for acid mine drainage remediation [J].

Sheridan, Craig ;

Harding, Kevin ;

Koller, Edward ;

De Pretto, Antonio .

WATER SA, 2013, 39 (03) :369-373

[14] ACIDIC MINE DRAINAGE . RATE-DETERMINING STEP [J].

SINGER, PC ;

STUMM, W .

SCIENCE, 1970, 167 (3921) :1121-&

[15]

Skousen J., 2005, Proceedings, American Society of Mining and Reclamation, Breckenridge, CO, P1100, DOI DOI 10.21000/JASMR05011100

[16]

Stumm W., 1996, AQUATIC CHEM

[17]

Taylor J., 2005, 5 AUSTR WORKSH AC MI

[18] The chemical characteristics of acid mine drainage with particular reference to sources, distribution and remediation: The Witwatersrand Basin, South Africa as a case study [J].

Tutu, H. ;

McCarthy, T. S. ;

Cukrowska, E. .

APPLIED GEOCHEMISTRY, 2008, 23 (12) :3666-3684

[19]

Wallace S.D., 2006, SMALL SCALE CONSTRUC

[20]

[No title captured]

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