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Field application of a tailored catalyst for hydrodechlorinating chlorinated hydrocarbon contaminants in groundwater

Schüth, Christoph and Kummer, Nikolai Alexeji and Weidenthaler, Claudia and Schad, Hermann (2004):
Field application of a tailored catalyst for hydrodechlorinating chlorinated hydrocarbon contaminants in groundwater.
In: Applied Catalysis B: Environmental, Elsevier, pp. 197-203, 52, (3), ISSN 09263373, DOI: 10.1016/j.apcatb.2004.03.018, [Online-Edition: https://www.sciencedirect.com/science/article/pii/S092633730...],
[Article]

Abstract

Catalytic hydrodechlorination via Pd catalysts is an efficient way to destroy chlorinated hydrocarbon compounds (CHCs) in aqueous systems. However, its application in groundwater suffers from rapid catalyst deactivation, e.g. by sulfur poisoning and interference with biological processes, such as growth of sulfate-reducing bacteria. In this paper we describe the application of a tailored catalyst for groundwater remediation in a full-scale field installation. The catalyst (Pd on a hydrophobic zeolite Y) was operated in a flow-through mode over 2 years and showed sustained removal efficiencies. Typical half-lives for CHC reduction were between 1.5 and 3min. As the addition of the reductant hydrogen results in favorable conditions for sulfate-reducing bacteria, the system was periodically flushed with a dilute H2O2solution to prevent the growth of this type of bacteria. With this it could be shown, that a catalytic method with noble metals for the direct reductive destruction of chlorinated contaminants in groundwater can be operated over extended periods of time with sustained efficiencies. © 2004 Elsevier B.V. All rights reserved.

Item Type: Article
Erschienen: 2004
Creators: Schüth, Christoph and Kummer, Nikolai Alexeji and Weidenthaler, Claudia and Schad, Hermann
Title: Field application of a tailored catalyst for hydrodechlorinating chlorinated hydrocarbon contaminants in groundwater
Language: English
Abstract:

Catalytic hydrodechlorination via Pd catalysts is an efficient way to destroy chlorinated hydrocarbon compounds (CHCs) in aqueous systems. However, its application in groundwater suffers from rapid catalyst deactivation, e.g. by sulfur poisoning and interference with biological processes, such as growth of sulfate-reducing bacteria. In this paper we describe the application of a tailored catalyst for groundwater remediation in a full-scale field installation. The catalyst (Pd on a hydrophobic zeolite Y) was operated in a flow-through mode over 2 years and showed sustained removal efficiencies. Typical half-lives for CHC reduction were between 1.5 and 3min. As the addition of the reductant hydrogen results in favorable conditions for sulfate-reducing bacteria, the system was periodically flushed with a dilute H2O2solution to prevent the growth of this type of bacteria. With this it could be shown, that a catalytic method with noble metals for the direct reductive destruction of chlorinated contaminants in groundwater can be operated over extended periods of time with sustained efficiencies. © 2004 Elsevier B.V. All rights reserved.

Journal or Publication Title: Applied Catalysis B: Environmental
Volume: 52
Number: 3
Publisher: Elsevier
Uncontrolled Keywords: Catalysis,Groundwater,Hydrodechlorination,Organic contaminants,Pd catalyst,Zeolite Y
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Hydrogeology
11 Department of Materials and Earth Sciences
Date Deposited: 17 Apr 2018 12:15
DOI: 10.1016/j.apcatb.2004.03.018
Official URL: https://www.sciencedirect.com/science/article/pii/S092633730...
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