Naslov
Quality of groundwater in eastern Croatia. The probem of arsenic pollution

Autori
Habuda-Stanić, Mirna ; Kuleš, Mirko ; Kalajdžić, Brankica ; Romić, Željka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of the 9th International Conference on Environmental Science and Technology. Volume of Abstracts / Lekkas, T.D. - Rodos : University of the Aegean and Global NEST, 2005

Skup
9th International Conference on Environmental Science and Technology

Mjesto i datum
Rodos, Grčka, 01.09.2005. - 03.09.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
arsenic removal; adsorption; clinoptilolite; manganese greensand; cationic exchange resin; hair arsenic concentration; Croatia

Sažetak
Ground waters are the main source of drinking water in the area of eastern Croatia. It has been found that they contain high concentrations of iron, manganese, ammonia, organic substances and arsenic. The appearance of inorganic arsenic in the ground waters is caused by arsenic from natural geological sources, as well as anthropogenic activities. Thus the ground waters are the main source of drinking water on this area, the population of 200.000 people daily drinking contaminated water with arsenic concentrations between 10 and 600 ppb. In the two towns on this region (Osijek and Vinkovci) where ground waters are processed by coagulation-filtration method which does not effectively remove arsenic and the final arsenic content exceeded current European legislation which set the maximum arsenic level in drinking water at 10 ppb. Croatia accepted that standard in the year 2004. Different study shows that chronic arsenic poisoning can occur after long-term exposure thought drinking water. Due to US National Research Council even the small amount of arsenic in drinking water can cause carcinogenic and cardiovascular diseases. Based on population observation that consumes arsenic-contaminated drinking water, the concentration associated with an excess lifetime skin cancer risk was calculated to be 2 ppb. The relationship between high amount of arsenic in drinking water and hair arsenic concentration was investigated in several towns and villages in eastern Croatia, since the hair arsenic concentration can be used as biomarker of overall arsenic exposure. Analyses were providing by hydride generation atomic absorption spectrometry. In this study different adsorbents were used and then compared in order to remove arsenic from water. Following modified adsorbents were used: clinoptilolite, manganese greensand, and cationic exchange resin. Adsorbents were chemically modified and saturated with Fe3+-ions, while the arsenic solutions were prepared by processed groundwater (pH 7.4 and water hardness of 260 μ gL-1. CaCO3).

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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