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Archives of Hygiene Sciences، جلد ۲، شماره ۴، صفحات ۱۳۵-۱۴۲
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عنوان انگلیسی Modelling of Disinfection by-products formation via UV irradiation of the water from Tajan River (source water for Sari drinking water, Iran)
چکیده انگلیسی مقاله Background & Aims of the Study Irradiation with ultraviolet light (UV) is used for the disinfection of bacterial contaminants in the production of potable water. The main objective of the study was to investigate and model Disinfection By-Products (DBPs) formation due to the UV Irradiation of the Tajan River water under different Irradiation conditions. Materials & Methods: Water samples were collected throughout September 2011 to August 2013. Transportation of the sample to the laboratory was done on ice in a cooler, and physiochemical analysis was conducted immediately within one day. Dissolved organic carbon (DOC) was determined by a TOC analyzer. Irradiation experiments were conducted in a series of 25 mL glass serum bottles with Teflon septa. The present study adopts an orthogonal design. The design involved irradiation with UV at a UV/DOC ratio of 0.5–3.0 and incubating (headspace-free storage) for 5–25 sec. A 1 mM phosphate buffer maintained the pH at 6, 7, or 8 respectively, and an incubator maintained the temperature (Temp) at 15, 20, or 25 °C respectively. The development of empirical models for DBPs formation used a multivariate regression procedure (stepwise) which applied the SPSS System for Windows (Version 16.0). Results: The results showed that the total DBPs formation ranged between 12.3 and 67.4 mg/l and that control of the levels was primarily due to the reaction time and the dissolved organic carbon level (DOC) in the water. Conclusions: Reaction time and level of DOC concentrations in water exerted a dominant influence on the formation of DBPs during the UV irradiation of water from the Tajan River. The relationships between the measured and predicted values were satisfactory with R 2 values ranging from 0.89 (for Octanal)–0.92 (for Formaldehydes). The DOC level in water is the key factor in controlling DBPs formation.
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نویسندگان مقاله اله بخش جاوید | allahbakhsh javid
school of public health, shahroud university of medical sciences, shahroud, iran


علی اکبر رودباری | aliakbar roudbari
center for health-related social and behavioral sciences research, shahroud university of medical sciences, shahroud, i


احمدرضا یاری | ahmad reza yari
research center for environmental pollutants, qom university of medical sciences, qom, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی قم (Qom university of medical sciences)

نشانی اینترنتی http://jhygiene.muq.ac.ir/browse.php?a_code=A-10-1-46&slc_lang=en&sid=en
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