Acute and sub-lethal toxicity of landfill leachate towards two aquatic macro-invertebrates: demonstrating the remediation potential of aerobic digestion
Bloor, M.C. and Banks, C.J. (2006) Acute and sub-lethal toxicity of landfill leachate towards two aquatic macro-invertebrates: demonstrating the remediation potential of aerobic digestion. Hydrobiologia, 556, (1), 387-397. (doi:10.1007/s10750-005-1201-6).
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Description/Abstract
A specific landfill leachate that contained 1.036 mgl−1of 2-chlorobiphenyl was used in the study (255 mg l−1 COD and 133 mg l−1 BOD5). Three, 2-l semi-continuous batch reactors (SBRs) were used to simulate the treatment potential of this method on a small scale. Aerobic digestion effectively reduced the leachates COD concentration. Regardless of dilution, the leachates COD reached a <20 mg l−1 equilibrium after 96 h exposure to aerobic digestion, however, increasing the level of dilution accelerated the process. In untreated leachate, the LC50 for Asellus aquaticus was 57% v/v leachate in deionised water and 5% for Gammarus pulex (96 h, static LC50 tests without nutrition and oxygen depleting conditions). After being exposed to aerobic digestion, these values rose to 95% and 40%, respectively. Prolonged exposure to a 1:20 sub-lethal dilution of the aforementioned leachate has been previously shown to affect the breeding colony size of Asellus aquaticus and a 1:66 dilution influenced the fecundity of a Gammarus pulex population. After remediation by aerobic digestion, however, the population dynamics of both test species remained unaltered.
| Item Type: | Article |
|---|---|
| ISSNs: | 0018-8158 (print) |
| Related URLs: | |
| Keywords: | erobic digestion, Asellus aquaticus, 2-chlorobiphenyl, Gammarus pulex, landfill leachate, toxicity tests |
| Subjects: | T Technology T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > School of Civil Engineering and the Environment |
| Item ID: | 53701 |
| Date Deposited: | 22 Jul 2008 |
| Last Modified: | 01 Jun 2011 02:34 |
| Contributors: | Bloor, M.C. (Author) Banks, C.J. (Author) |
| Date: | February 2006 |
| Status: | Published |
| Contact Email Address: | M.C.Bloor@soton.ac.uk |
| URI: | http://eprints.soton.ac.uk/id/eprint/53701 |
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