:: Journal of International Environmental Application & Science ::

Year 2008, Volume III (Issue I)

Journal of International Environmental Application and Science , Vol. 3, No. 2 (2008), 21-28


Analysis of Mercury in Wastewater of some Dental Clinics in United Arab Emirates

Sausan Al Kawas1, Imad A. Abu-Yousef 2, Sofian Kanan2, Mohamed El-Kishawi1, Abubaker Siddique3, Naser Abdo2 and Amjad Shraim 4, 5

1Department of Oral and Craniofacial Health Sciences, College of Dentistry, University of Sharjah, Sharjah-UAE
2Department of Biology and Chemistry, College of Arts and Sciences, American University of Sharjah, Sharjah-UAE
3Zayed Military Hospital, Abu Dhabi, UAE
4Chemistry Department, Faculty of Science, Taibah University, Almadina Almunawarah-KSA
55National Research Centre for Environmental Toxicology (EnTox), The University of Queensland, 39 Kessels Road, Coopersplains, Brisbane, Queensland 4108, Australia


Abstract: The amount of mercury in the wastewater of three dental clinics from United Arab Emirates over a period of 3 to 17 days was quantified using cold vapour-atomic absorption spectrometry technique. The total Hg concentration in the wastewater of these clinics ranged from 25 to 146 μg d-1. The Hg concentration in the wastewater samples collected from the outlets of the dental chairs after dental treatments varies depending on the type of dental treatment: the average Hg concentration in the samples of only amalgam restoration is 39 μg per sample (std. dev. 37, range 4-142); for samples with amalgam restoration plus other types of dental treatment is 24 μg per sample (std. dev. 24, range < MDL-77); and for sample with no amalgam restoration is 18 μg per sample (std. dev. 16, range
Keywords: Dental amalgam; mercury; dental wastewater; United Arab Emirates