مدل‌سازی تشکیل تری‌هالومتان‌ها در اثر کلرزنی به آب رودخانه

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده بهداشت، دانشگاه علوم پزشکی شاهرود، ایران

2 مربی، دانشکده بهداشت، دانشگاه علوم پزشکی شاهرود، ایران

چکیده

هدف از این مطالعه، ارائه مدلی برای برآورد تولید تری‌هالومتان‌های ناشی از کلزنی آب رودخانه بود. برای این منظور، پس از طراحی آزمایش‌ها، نسبت‌های مختلف کلر به کربن آلی در نمونه‌ها ایجاد شد و غلظت‌های متفاوتی از بروماید نیز به نمونه‌ها اضافه شد. بعد از انکوباسیون، مقدار ترکیبات آلی طبیعی، TOC و DOC توسط آنالایزرها اندازه‌گیری و داده‌ها وارد نرم‌افزار SPSS شد و رگرسیون چند متغیره انجام و مدل آماری متناسب استخراج شد. در این مطالعه، چهار رابطه برای پیش‌بینی تولید تری‌هالومتان‌ها به‌دست آمد و مشخص شد که عوامل اصلی تشکیل تری‌هالومتان‌ها، زمان واکنش و غلظت بروماید در آب است. خطر سرطان‌زایی ناشی از تری‌هالومتان‌ها در این نمونه آب نیز، در غلظت بروماید 207 تا 246 میکروگرم در لیتر به حداکثر رسید. روابط حاصل‌شده در این مطالعه می‌تواند به‌عنوان ابزاری ساده در برآورد اولیه پتانسیل تولید تری‌هالومتان‌ها در منابع آبی به‌کار برده شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Modeling Trihalomethane (THM) Formation due to River Water Chlorination

نویسندگان [English]

  • Allahbakhsh Javid 1
  • Aliakbar Roodbari 1
  • Saeid Nazemi 2
1 Assist. Prof., Faculty of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
2 Instructor, Faculty of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
چکیده [English]

The aim of this study was to develop a model for estimation of major THMs produced as a result of river water disinfection. Experiments were designed for this purpose and different ratios of Cl2 to DOC were created in water samples to which were then added different concentrations of bromide ions. After the incubation period, analyzers were used to measure natural organic compounds, TOC, and DOC in the samples and the data thus obtained were fed into the SPSS software. Moreover, multivariate regression analysis was performed to extract the relevant statistical model. Four different formulas were obtained for predicting the rate of each of the THMs produced. Reaction time and bromide ion concentration were identified as the main factors involved in the production of THMs in the water supply investigated. In addition, the carcinogenicity of THMs in water samples reached its maximum with bromide concentrations between 207 and 246 µg/l. The formulas obtained in this study can be used as a simple and accurate tool for the initial estimation of THMs production in different water supplies.

کلیدواژه‌ها [English]

  • THMs
  • chlorination
  • Modeling
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