Strategic selection of an optimal sorbent mixture for in-situ remediation of heavy metal contaminated sediments: Framework and case study

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:105

Article

Chiang, Y. W.¹  Santos, R. M.²  Ghyselbrecht, K.³  Cappuyns, V.^4,5  Martens, J. A.¹  Swennen, R.⁴  Van Gerven, T.²  Meesschaert, B.^1,3 

[1] Katholieke Univ Leuven, Dept Microbial & Mol Syst, B-3001 Heverlee, Belgium

[2] Katholieke Univ Leuven, Dept Chem Engn, B-3001 Heverlee, Belgium

[3] Katholieke Hogesch Brugge, Fac Ind Engn Sci & Technol, B-8400 Oostende, Belgium

[4] Katholieke Univ Leuven, Dept Earth & Environm Sci, B-3001 Heverlee, Belgium

[5] Hogesch Univ Brussel, Fac Econ & Management, B-1000 Brussels, Belgium

关键词: Framework;    Remediation;    Adsorption;    Heavy metal;    Sediment;    Waste-derived sorbent;    In-situ;   

DOI  :  10.1016/j.jenvman.2012.03.037

来源: Elsevier

【 摘 要 】

Aquatic sediments contaminated with heavy metals originating from mining and metallurgical activities pose significant risk to the environment and human health. These sediments not only act as a sink for heavy metals, but can also constitute a secondary source of heavy metal contamination. A variety of sorbent materials has demonstrated the potential to immobilize heavy metals. However, the complexity of multi-element contamination makes choosing the appropriate sorbent mixture and application dosage highly challenging. In this paper, a strategic framework is designed to systematically address the development of an in-situ sediment remediation solution through Assessment, Feasibility and Performance studies. The decision making tools and the experimental procedures needed to identify optimum sorbent mixtures are detailed. Particular emphasis is given to the utilization and combination of commercially available and waste-derived sorbents to enhance the sustainability of the solution. A specific case study for a contaminated sediment site in Northern Belgium with high levels of As, Cd, Pb and Zn originating from historical non-ferrous smelting is presented. The proposed framework is utilized to achieve the required remediation targets and to meet the imposed regulations on material application in natural environments. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

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