بررسی اثر استفاده از روش ازن‌زنی برای حذف سم بوتاکلر از آب، مطالعه موردی: آب‌های زیرزمینی استان گیلان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 مربی، معاونت پژوهشی جهاد دانشگاهی واحد گیلان، رشت

2 استادیار، معاونت پژوهشی جهاد دانشگاهی واحد گیلان، رشت

3 دکترای محیط زیست، معاونت پژوهشی جهاد دانشگاهی واحد گیلان، رشت

چکیده

در منابع آبی استان گیلان، مقدار زیادی از علف‌کش‌ها (بوتاکلر) به‌دلیل استفاده بی‌رویه از کودهای شیمیایی برای افزایش محصول در مزارع برنج وارد آب می‌شود. در این پژوهش اثرات ازن‌زنی برای حذف سم بوتاکلر باقیمانده از آب بررسی شد. نمونه‌ها در طی چهار فصل از 20 چاه منتخب جمع‌آوری شد و پس از تثبیت پارامترهای فیزیکوشیمیایی با استفاده از سیستم استخراج مایع و کروماتوگرافی گازی آنالیز شدند. اندازه‌گیری‌های کمّی با روش افزایش استاندارد انجام شد و برای بررسی روش‌های حذف از دستگاه مولد ازن استفاده شد. برای بررسی‌های آماری نیز از نرم‌افزار SPSS بهره گرفته شد. مطابقنتایجبه‌دستآمده،غلظتباقیماندهبوتاکلر درنمونه‌هایآنالیزشدهبالاترازحد استانداردهایجهانیبه‌دستنیامد. دربررسیروش حذف، تأثیر پارامترهایدما،سختیوpH  مطالعهشد و مشخص شد که در آب‌هایی باpH  قلیایی و دمای بالا، راندمان حذف بوتاکلر به‌روش ازن‌زنی افزایش می‌یابد و این در حالی است که با افزایش سختی، این راندمان کاهش می‌یابد. همچنین در بررسی حاضر از مدل سینتیکی شبه نوع اول، برای بررسی نرخ تماس ازن با بوتاکلر استفاده شد و با توجه به نتایج به‌دست آمده مشخص شد که حاصلضرب غلظت ازن در مدت زمان تماس، با لگاریتم میزان بوتاکلر رابطه خطی و غیرمستقیم دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Removal of Butachlor Toxin Polluted Water Using Ozonation, A Case Study of Groundwater Resources in Guilan Province

نویسندگان [English]

  • mirmoslem Hashemi 1
  • Mehdi Ashoornia 2
  • Maryam Panahandeh 3
1 Instructor, Research Deputy of Guilan Branch of Academic Center for Education, Culture and Research (ACECR), Rasht, Iran
2 Assist. Prof., Research Deputy of Guilan Branch of Academic Center for Education, Culture and Research (ACECR), Rasht, Iran
3 PhD of Environment, Research Deputy of Guilan Branch of Academic Center for Education, Culture and Research (ACECR), Rasht, Iran
چکیده [English]

Rice is an important staple food in most parts of the world. The water resources in Guilan Province are receiving large quantities of herbicides (butachlor) due to the vast rice fields in the province and the indiscriminate use of chemical fertilizers for increased harvest. The present study investigates the effects of ozone used for removing the remaining butachlor from groundwater. Samples were collected from 20 wells during four seasons and their physicochemical parameters were analyzed using gas chromatography and liquid extraction after their fixation. Quantitative measurements were performed using the standard enhancement method and removal methods were evaluated using an ozone generator. The results were subjected to statistical analysis using the SPSS software. The results showed that the residual concentration of butachlor in the samples was not above the recommended international limits. The effects of temperature, hardness, and pH were investigated to determine the efficiency of the removal method used and it was found that the butachlor removal efficiency of ozonation was higher in waters with an alkaline pH and high temperatures, while it decreased with increasing hardness. The pseudo-first order kinetic model was used to investigate the rate of ozone to butachlor contact to find that the product of ozone concentration by contact time had a linear and indirect relationship with the logarithm of the butachlor content.

کلیدواژه‌ها [English]

  • Butachlor
  • Gas Chromatography
  • Ozone
  • Kinetic Model
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