نشریه محیط زیست طبیعی

بررسی آلودگی شوینده در رودخانة خاکو و دره مرادبیگ همدان با استفاده از اندازه‌گیری آلکیل بنزن سولفانات خطی (LAS) به‌عنوان نشانگر تخلیة فاضلاب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری علوم و مهندسی محیط زیست، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، ملایر، ایران

2 استادیار گروه آلودگی محیط زیست، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، ملایر، ایران

چکیده

این مطالعه، به‌منظور بررسی غلظت و ارزیابی ریسک اکولوژیک و سلامت آلاینده آلکیل بنزن سولفانات خطی (Linear alkylbenzene solphonate)، رایج­ترین سورفاکتانت آنیونی مورد استفاده در فرمولاسیون مواد شوینده، در رودخانه خاکو و دره مرادبیگ استان همدان به اجرا درآمد. پس از نمونه­ برداری از آب 13 ایستگاه در طول رودخانه و سنجش برخی از پارامترهای کیفیت آب در محل نمونه ­برداری، نمونه ­ها به آزمایشگاه منتقل و جذب LAS از طریق دستگاه اسپکتروفتومتر (UV-VIS-NIR) در طول ­موج nm  650 خوانش و با استفاده از منحنی کالیبراسیون غلظت نهایی LAS محاسبه شد. نتایج، غلظت LAS اندازه­ گیری شده را در دامنه 1/66-0/2 میلی­ گرم بر لیتر نشان داد. نتایج آزمون همبستگی پیرسون بین LAS و پارامترهای کیفیت آب رابطة خطی معنی­داری را نشان نداد. نتایج ارزیابی ریسک اکولوژیک، در 9 ایستگاه ریسک زیاد، در 2 ایستگاه ریسک متوسط و در2 ایستگاه ریسک کم را نشان داد. نتایج ارزیابی ریسک سلامت LAS، عدم وجود ریسک در گروه­های سنی مختلف را نشان داد. نتایج مقایسه غلظت LAS با استاندارد تخلیه سورفاکتانت ­ها به داخل آب­ های سطحی و مصارف کشاورزی و آبیاری در ایران نشان داد میانگین غلظت LAS از نظر تخلیه به داخل آب ­های سطحی کمتر از حد مجاز ولی از نظر استفاده برای مصارف کشاورزی و آبیاری بیشتر از حد مجاز است. با توجه به اهمیت این رودخانه­ها به‌لحاظ تامین آب شرب و کشاورزی و لزوم حفظ سلامت محیط زیست و جامعه، لازم است اقدامات موثری در جهت کنترل ورود فاضلاب تصفیه نشده به رودخانه خاکو و دره مرادبیگ صورت پذیرد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of detergent pollution in the Khako and Dare-Moradbaig Rivers of Hamedan Province using linear alkyl benzene sulfonate (LAS) measurement as a wastewater discharge marker

نویسندگان [English]

  • faezeh jafari 1
  • Nasrin Hassanzadeh 2

1 PhD student in Environmental Science and Engineering, Department of Environmental Pollution, Faculty of Natural Resources and Environment, Malayer University, Malayer, Iran

2 Assistant Professor, Environmental Science Department Faculty of Natural Resources & Environment Malayer University, Malayer , Iran

چکیده [English]

This study was conducted to investigate the concentration, ecological, and health risk assessment of linear alkylbenzene sulfonate (LAS(, as the most common anionic surfactant in detergent formulations, in the Khako and Dare-Moradbaig Rivers in Hamadan Province. 13 stations accordingly were selected for water sampling, and some water quality parameters were measured at the sampling site. The samples were then transferred to the laboratory, the LAS absorption was read by spectrophotometer (UV-VIS-NIR) at 650 nm, and the final LAS concentration was calculated using the calibration curve equation. The results showed the LAS concentration was in a range of 0.2-1.66 mg/L. The Pearson correlation test did not show a significant linear relationship between LAS and water quality factors. The results of the ecological risk assessment in 9 stations were high risk, medium risk in 2 stations, and low risk in the 2 other stations. The results of the health risk assessment of LAS also showed no risk at different age groups. The comparison of LAS concentration with standard surfactant discharge (in surface water, irrigation, and agricultural applications in Iran) showed that the mean concentration of LAS in terms of discharge into surface waters is less than the allowable limit. By contrast, in terms of use for agriculture and irrigation, the mean LAS concentration is higher than the allowable limit. Given the importance of these rivers in terms of drinking water and agriculture supply and the need to maintain the health of the environment and society, it is necessary to take effective measures to control the entry of untreated wastewater into the Khako and the Dare-Moradbaig Rivers.

کلیدواژه‌ها [English]

  • Anionic surfactant
  • Detergent
  • Khako and Dare-Moradbaig River
  • Risk assessment
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نشریه محیط زیست طبیعی
دوره 74، شماره 4
اسفند 1400
صفحه 825-840