بررسی غلظت باقی‌مانده سم ارگانوفسفره دیازینون در آب رودخانه عباس‌آباد همدان

محورهای موضوعی : آلودگی های محیط زیست (آب، خاک و هوا)

سحر عرفی یگانه ¹ , سهیل سبحان اردکانی ² , سعید جامه بزرگی ³

1 - دانش‌آموخته کارشناسی ارشد محیط‌زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران.
2 - استاد گروه محیط‌زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران. *(مسوول مکاتبات)
3 - دانشیار گروه شیمی، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران.

تاریخ دریافت : 1393/12/10 تاریخ پذیرش : 1394/07/28 تاریخ انتشار : 1400/04/01

کلید واژه: دیازینون, رودخانه عباس‌آباد, اسپکتروفتومتری, همدان, آلودگی آب,

چکیده مقاله :

زمینه و هدف: رشد روزافزون جمعیت و نیاز به توسعه تولیدات کشاورزی باعث افزایش کاربرد آفت کش ها و در نتیجه آلودگی منابع آب به عنوان یکی از معضلات محیط‌زیستی شده است. از این‌رو، این پژوهش با هدف تعیین غلظت باقی مانده آفت کش دیازینون در آب رودخانه عباس آباد همدان در سال 1393 انجام یافت.روش بررسی: پس از بازدید میدانی و انتخاب چهار ایستگاه در طول رودخانه به‌روش تصادفی سیستماتیک، نمونه برداری از آب در اواخر اردیبهشت‌ماه و اواخر تیرماه انجام یافت. نمونه ها با استفاده از روش استخراج فاز مایع آماده و غلظت باقی مانده سم به وسیله دستگاه اسپکتروفتومتر‎ خوانده شد. برای پردازش آماری داده ها نیز از نرم افزار SPSS استفاده شد.یافته ها: بیشینه میانگین غلظت باقی مانده سم دیازینون در نمونه های فصول بهار و تابستان ( میکروگرم در لیتر) با 2/10 ± 0/97 و 7/13 ± 202 به ترتیب مربوط به ایستگاه ‌های 3 و 2 بود. نتایج مقایسه میانگین غلظت باقی مانده سم دیازینون در نمونه های فصول بهار و تابستان با رهنمودهای WHO و EPA نیز نشان داد که میانگین غلظت باقی مانده سم در هر دو فصل از بیشینه رواداری این سازمان ها بیش تر بوده است.بحث و نتیجه گیری: با توجه به تجاوز میانگین غلظت باقی مانده سم در نمونه های آب مورد ارزیابی، توجه به مواردی از جمله آموزش باغ داران به منظور استفاده صحیح و اصولی از سموم آفت کش ضروری است. هم چنین به منظور استفاده از آب این رودخانه برای شرب و یا پرورش ماهیان سردآبی باید تمهیداتی اندیشیده شود.

چکیده انگلیسی:

Background and Objective: Increasing population growth and the need to develop agricultural products have increased the use of pesticides and thus the pollution of water resources as one of the environmental problems. Therefore, this study was conducted to determine the residual concentration of diazinon pesticide in the water of Abbasabad River in Hamedan in 2014.Method: Water samples were collected from four stations along the Abbas Abad River. In the laboratory, after sample preparation, diazinon residues were determined using a spectrophotometric method. All statistical analyses were performed using the SPSS software.Findings: The maximum mean concentration of diazinon residues (µg/L) in samples of spring and summer seasons were 97.0 ± 10.2 and 202 ± 13.7, respectively. Also, the mean contents of pesticide residues in the water samples in both seasons were higher than the maximum contaminant levels (MCLs) established by WHO and EPA.Discussion and Conclusion: Due to exceeding the average residual concentration of pesticides in the evaluated water samples, it is necessary to pay attention to issues such as training gardeners in order to use pesticides correctly and in principle. Also, measures should be considered in order to use the water of this river for drinking or farming cold-water fish. 

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