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Acute and sub-lethal toxicity of landfill leachate towards two macro-invertebrates: assessing the remediation potential of constructed wetlands

Acute and sub-lethal toxicity of landfill leachate towards two macro-invertebrates: assessing the remediation potential of constructed wetlands
Acute and sub-lethal toxicity of landfill leachate towards two macro-invertebrates: assessing the remediation potential of constructed wetlands
Aspecific leachate that contained 1.036 mgl–1 of 2-chlorobiphenyl was used in the study (255 mgl–1 COD and 133 mgl–1 BOD5). When operated on a 10 day hydraulic retention time (RT), reed beds planted with Juncus effusus removed 60% of the leachates COD, compared to 25% in unplanted beds. The constructed wetlands proved effective at reducing the level of acute toxicity to A. aquaticus and G. pulex. In untreated leachate, the LC50 for A. aquaticus was 57% v/v leachate in deionized water and 5% for G. pulex. When reed beds were operated on a 1–10 day RT, the LC50 for Asellus increased from 69% to below the LC50 threshold. The Gammarus LC50 also rose from 10% to 50%. The maximum toxicity reduction achieved by unplanted beds was 10% towards A. aquaticus and 5% for G. pulex, when operated on a 10 day RT. However, in sub-lethal concentrations of reed bed effluent (100%, 80% and 60% dilutions, obtained from planted beds on a 10 day RT), the final length of Asellus was significantly reduced, in comparison to a deionized water control. It is also speculated that chronic leachate stress may have affected the fecundity of Gammarus, however, insufficient data was collected to statistically validate this hypothesis.
asellus aquaticus, 2-chlorobiphenyl, constructed wetlands, Gammarus pulex, landfill leachate, toxicity tests
0957-5820
184-190
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Bloor, M.C.
97ed259c-17a3-40b5-95c2-f3f4957c36d5
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Bloor, M.C.
97ed259c-17a3-40b5-95c2-f3f4957c36d5

Banks, C.J. and Bloor, M.C. (2005) Acute and sub-lethal toxicity of landfill leachate towards two macro-invertebrates: assessing the remediation potential of constructed wetlands. Process Safety and Environmental Protection, 83 (2), 184-190. (doi:10.1205/psep.03303).

Record type: Article

Abstract

Aspecific leachate that contained 1.036 mgl–1 of 2-chlorobiphenyl was used in the study (255 mgl–1 COD and 133 mgl–1 BOD5). When operated on a 10 day hydraulic retention time (RT), reed beds planted with Juncus effusus removed 60% of the leachates COD, compared to 25% in unplanted beds. The constructed wetlands proved effective at reducing the level of acute toxicity to A. aquaticus and G. pulex. In untreated leachate, the LC50 for A. aquaticus was 57% v/v leachate in deionized water and 5% for G. pulex. When reed beds were operated on a 1–10 day RT, the LC50 for Asellus increased from 69% to below the LC50 threshold. The Gammarus LC50 also rose from 10% to 50%. The maximum toxicity reduction achieved by unplanted beds was 10% towards A. aquaticus and 5% for G. pulex, when operated on a 10 day RT. However, in sub-lethal concentrations of reed bed effluent (100%, 80% and 60% dilutions, obtained from planted beds on a 10 day RT), the final length of Asellus was significantly reduced, in comparison to a deionized water control. It is also speculated that chronic leachate stress may have affected the fecundity of Gammarus, however, insufficient data was collected to statistically validate this hypothesis.

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More information

Published date: March 2005
Keywords: asellus aquaticus, 2-chlorobiphenyl, constructed wetlands, Gammarus pulex, landfill leachate, toxicity tests

Identifiers

Local EPrints ID: 53712
URI: https://eprints.soton.ac.uk/id/eprint/53712
ISSN: 0957-5820
PURE UUID: 1083755a-3083-4406-866c-6d2c412d1ef6

Catalogue record

Date deposited: 22 Jul 2008
Last modified: 13 Mar 2019 20:40

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