Naslov
Toxicological and chemical assessment of arsenic-contaminated groundwater after electrochemical and advanced oxidation treatments

Autori
Radić, Sandra ; Crnojević, Helena ; Vujčić, Valerija ; Gajski, Goran ; Gerić, Marko ; Cvetković, Želimira ; Cvjetko, Petra ; Garaj- Vrhovac, Vera ; Oreščanin, Višnja

Izvornik
Science of the total environment (0048-9697) 543 (2016); 147-154

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
arsenic ; toxicity ; human lymphocytes ; Lemna minor ; Daphnia magna ; advanced treatment

Sažetak
Owing to its proven toxicity and mutagenicity, arsenic is regarded a principal pollutant in water used for drinking. The objective of this study was the toxicological and chemical evaluation of groundwater samples obtained from arsenic enriched drinking water wells before and after electrochemical and ozone-UV-H2O2- based advanced oxidation processes (EAOP). For this purpose, acute toxicity test with Daphnia magna and chronic toxicity test with Lemna minor L. were employed as well as in vitro bioassays using human peripheral blood lymphocytes (HPBLs). Several oxidative stress parameters were estimated in L.minor. Physicochemical analysis showed that EAOP treatment was highly efficient in arsenic but also in ammonia and organic compound removal from contaminated groundwater. Untreated groundwater caused only slight toxicity to HPBLs and D. magna in acute experiments. However, 7-day exposure of L. minor to raw groundwater elicited genotoxicity, a significant growth inhibition and oxidative stress injury. The observed genotoxicity and toxicity of raw groundwater samples was almost completely eliminated by EAOP treatment. Generally, the results obtained with L. minor were in agreement with those obtained in the chemical analysis suggesting the sensitivity of the model organism in monitoring of arsenic- contaminated groundwater. In parallel to chemical analysis, the implementation of chronic toxicity bioassays in a battery is recommended in the assessment of the toxic and genotoxic potential of such complex mixtures.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA