Bioassays and biochemical biomarkers for assessing olive mill and citrus processing wastewater toxicity

TitleBioassays and biochemical biomarkers for assessing olive mill and citrus processing wastewater toxicity
Publication TypeJournal Article
Year of Publication2011
AuthorsKaraouzas, I, Cotou E, Albanis TA, Kamarianos A, Skoulikidis NT, Giannakou U
JournalEnvironmental Toxicology
Volume26
Issue6
Pages669 - 676
KeywordsAChE, Bioassays, Biochemical biomarkers, Citrus processing wastewater, GST, LC 50, Macroinvertebrates, Olive mill wastewater, Pollution, Rivers
Abstract

The toxicity and the biochemical effects of olive mill wastewater and citrus processing wastewater were evaluated using acute toxicity bioassays (Gammarus pulex and Hydropsyche peristerica) and biochemical biomarkers (acetylcholinesterase [AChE] and glutathione S-transferase [GST]). The bioassays indicated toxic properties of olive mill and citrus processing wastewaters. The 24 h LC 50 values of olive mill wastewater ranged from 2.64% to 3.36% for G. pulex and 3.62% to 3.88% for H. peristerica, while the LC 50 of citrus processing wastewater was 25.26% for G. pulex and 17.16% for H. peristerica. Based on a five-class hazard classification system applied for wastewaters discharged into the aquatic environment, olive mill wastewater and citrus processing wastewater were classified as highly toxic and toxic, respectively. Results of the biochemical biomarkers showed that both agroindustrial effluents at increasing sublethal wastewater concentrations could cause inhibition of the AChE and induction of the GST activities. These first results showed that both species as well as their AChE and GST activities have the potential to be used as indicators and biomarkers for assessing olive mill and citrus processing wastewaters quality. © 2010 Wiley Periodicals, Inc.

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