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TAKING SEDIMENT DEPOSITION INTO ACCOUNT FOR ADVERSE EFFECTS OF ACTIVATED CARBON ON BENTHIC ORGANISMS: A COMPARISON BETWEEN FIELD AND LABORATORY RESULTS
Puvanenthirarajah, Subramaniam, Master's thesis, University of Eastern Finland, 46 pp, 2017
This study investigated the influence of sedimentation on the adverse effects of activated carbon (AC) on benthic organisms in field and lab experiments. A plot of 300 m2 of sediment was capped with 1000 kg of pressed SediMite® pellets at Lake Kernaalanjaervi, followed 10 months later by a benthic fauna survey. Base test sediment was capped with 1.2 kg/m2 AC and topped with five different sediment doses from 1.32 to 13.23 kg/m2. Lumbriculus variegatus was exposed on each test area for 28 days. Adverse effects of AC on benthic organisms were not obvious in the field experiment, whereas clear adverse effects of AC were seen in the lab. In the field, the reproduction and growth rate of L. variegatus moderately correlated with the number of top sediment doses on AC. Results suggest that adverse effects of AC can be mild if new sediment is formed over the AC deposit, with no greater adverse effects expected over the long term. http://epublications.uef.fi/pub/urn_nbn_fi_uef-20170992/index_en.html
This study investigated the influence of sedimentation on the adverse effects of activated carbon (AC) on benthic organisms in field and lab experiments. A plot of 300 m2 of sediment was capped with 1000 kg of pressed SediMite® pellets at Lake Kernaalanjaervi, followed 10 months later by a benthic fauna survey. Base test sediment was capped with 1.2 kg/m2 AC and topped with five different sediment doses from 1.32 to 13.23 kg/m2. Lumbriculus variegatus was exposed on each test area for 28 days. Adverse effects of AC on benthic organisms were not obvious in the field experiment, whereas clear adverse effects of AC were seen in the lab. In the field, the reproduction and growth rate of L. variegatus moderately correlated with the number of top sediment doses on AC. Results suggest that adverse effects of AC can be mild if new sediment is formed over the AC deposit, with no greater adverse effects expected over the long term. http://epublications.uef.fi/pub/urn_nbn_fi_uef-20170992/index_en.html
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