بررسی اثر پراکنش آلاینده هوا (NO2) بر فلزات سنگین موجود در خاک (مطالعه موردی: پالایشگاه میعانات گازی سیراف)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه تخصصی ارزیابی و آمایش سرزمین، دانشکده منابع‌طبیعی و محیط‌زیست، دانشگاه علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 استادیار، گروه تخصصی ارزیابی و آمایش سرزمین، دانشکده منابع‌طبیعی و محیط‌زیست، دانشگاه علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

3 دانشیار، دانشکده محیط‌زیست، پردیس دانشکده های فنی، دانشگاه تهران، ایران

چکیده

در حال حاضر آلودگی هوا در مناطق نفت‌‌خیز و اطراف آن از جمله چالش‌‌های عمده‌‌ای است که متاسفانه منجر به بروز مشکلات مهمی برای کشور و ساکنین منطقه شده است. در مطالعه حاضر برای تعیین همبستگی میان آلاینده NO2 خروجی از فلر پالایشگاه میعانات گازی سیراف و فلزات سنگین خاک، ابتدا نرخ انتشار این آلاینده با استفاده از ضرایب پیشنهادی توسط سازمان حفاظت محیط‌زیست ایالات متحده آمریکا به میزان g/s0417/1 محاسبه شده و در نهایت مدل‌سازی هوا با استفاده از نرم‌افزار AERMOD انجام شد. با توجه به نتایج حاصل از مدل‌سازی بیشترین پراکنش آلاینده‌‌ NO2 بر اساس جهت باد غالب از غرب به شرق است. همچنین نتایج نمونه‌‌برداری خاک در 6 نقطه اطراف سایت با استاندارد سازمان حفاظت محیط‌زیست مقایسه و مشخص شد که در مناطق فوق میزان فلز سرب بالاتر از حد مجاز استاندارد است. با انجام آزمون تحلیل واریانس و آزمون چند دامنه‌‌ای دانکن با نرم‌‌افزار spss، به دلیل پراکنش منابع آلاینده از قبیل فازهای 19، 12، 14، سایت LNG و کارخانه سیمان آرام در غرب سایت، بیشترین پراکنش فلز سرب با توجه به جهت باد غالب (غرب به شرق) به سمت محدوده سایت پالایشگاه میعانات گازی سیراف می‌‌باشد. بررسی همبستگی فلزات سنگین و آلاینده NO2 نشان داد که بین این آلاینده و فلز سرب در خاک به دلیل ایجاد ترکیبات آنیونی نیتریت و نیترات و در نهایت تشکیل نمک، همبستگی مثبت و معنادار است.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the Role and Influence of Airborne Pollutant (NO2) Dispersion on Heavy Metals in Soil (Case Study of Syraf Gas Condensate Refinery)

نویسندگان [English]

  • Anita Khaleghi 1
  • Maryam Robati 2
  • Abdolreza Karbassi 3
  • Forough Farsad 2
1 M.Sc. Student, Department of Land Assessment and Land Management, Faculty of Natural Resources and Environment, University of Science and Research, Islamic Azad University, Tehran, Iran
2 Assist. Profe. Department of Land Assessment and Planning, Faculty of Natural Resources and Environment, Universityof Science and Research, Islamic Azad University, Tehran, Iran
3 Assoc. Profe. Faculty of Environment, Campus of Technical Faculties, University of Tehran
چکیده [English]

Today, air pollution in oilfield and refinery areas and around it is one of the major challenges that unfortunately creates important problems for the residents of the region.In the present study, to determine the relationship and correlation between NO2 emissions from the flare of Syraf gas condensate refinery and heavy metals in the soil. The emission rate of this pollutant was calculated using the proposed emission factors by the US Environmental Protection Agency 1.0417g/s and the air modeling was done using AERMOD software. The most dispersion of NO2 is based on the wind direction from the west to the east. Sampling results from soil at 6 points around the site were compared with the standards of the Environmental Protection Agency for soil and it was found the lead metal content was higher than the standard. one-way ANOVA and Duncan's multiple domain test used in Spss software, the highest lead dispersion due to the distribution of more pollutant sources such as 19, 12, 14 phases, as well as the LNG site and the Aram Cement Factory located in the western part of the site, is related to this area of the site. The correlation between heavy metals and NO2 pollutants showed that there was a positive and significant correlation between this pollutant and lead metal in soil surface, Because of the Nitrite and Nitrate anionic compounds in the soil, these compounds form salt with the adsorption of lead metal.

کلیدواژه‌ها [English]

  • Siraf refinery
  • Lead metal
  • NO2 pollutant
  • Flare and AERMOD

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پژوهش های محیط زیست
دوره 12، شماره 23
مجله پژوهشی
شهریور 1400
صفحه 171-183

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