SRCosmos:

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Keywords	THMs, HAAs, DOC, GAC, adsorption, drinking water treatment.
Abstract	A pilot-plant study was carried out with the water supply to Athens water works filtered through a granular activated carbon (GAC) filter- adsorber. The objective of this study was to evaluate the performance of GAC for the removal from drinking water of the two main groups of disinfection by -products (DBPs), trihalomethanes (THMs) and haloacetic acids (HAAs), as well as of dissolved organic matter. The pilot treatment facility is located at the Water Treatment Plant of EYDAP in Galatsi, Athens, and was operated as a rapid gravity filter - adsorber. It was fed with chlorinated water, coming from the overflow of the sedimentation tanks, and operated continuously in parallel with a full-scale sand filter. At regular time intervals water samples were taken from both filters and analysed for THMs, HAAs and DOC. Other parameters were measured too. The operation of the GAC filter-adsorber continued until the GAC adsorption capacity for THMs and HAAs was almost exhausted. The results of the analyses showed that GAC was more effective in removing the dissolved organic matter than the smaller molecules of THMs and HAAs, fact which is in agreement with the relevant literature. GAC was also proved more effective in removing HAAs than removing THMs. The removal of THMs and the most part of the removal of HAAs and DOC must be attributed to adsorption by GAC, while that of a smaller part of DOC and HAAs may be attributed to biological activity in the filter bed, where chlorine had been totally removed by the catalytic action of the activated carbon surface.
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Name	Affiliation	Home page	e-mail	Total pubs
Babi KG	Department of Environmental Studies, University of the Aegean, University Hill, Mytilene 81100, Greece		kbabi@env.aegean.gr	16
Koumenides KM	Department of Environmental Studies, University of the Aegean, University Hill, Mytilene 81100, Greece			15
Lekkas TD	University of the Aegean, Dept. of Environmental Studies	http://www.tlekkas.gr/	vlekkas@aegean.gr	71
Makri CA	University of the Aegean, Faculty of the Environment, Dept. of Environmental Studies University Hill, 81 100 Mytilene, Greece		chm@aegean.gr	19
Mihopoulos NS				3
Nikolaou AD	Department of Marine Sciences, University of the Aegean, University Hill, 81100 Mytilene, Greece		nnikol@aegean.gr	44
Tzoumerkas FK	EYDAP, 156 Oropou str., Galatsi, Athens, Greece			7