نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، گروه زمین‌شناسی، دانشکده علوم، دانشگاه فردوسی مشهد، مشهد، ایران

2 دانشیار، گروه زمین‌شناسی، دانشکده علوم، دانشگاه فردوسی مشهد، مشهد، ایران

3 استاد، گروه زمین‌شناسی، دانشکده علوم، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

در این پژوهش به‌منظور بررسی کیفیت منابع آب‌ منطقه پالایشگاه گاز شهید هاشمی‌نژاد و پساب‌های تولیدی در این واحد از نظر خورندگی و رسوب‌گذاری 18 نمونه آب سطحی و زیرزمینی و پنج نمونه پساب موردمطالعه قرار گرفتند. pH، EC، دما و غلظت یون‌های اصلی شامل K+، Cl-، Na+، HCO3- وCO32- در نمونه‌های برداشت‌شده اندازه‌گیری شدند. با استفاده از نمودار Piper اکثر نمونه‌های آب تیپ و رخساره سدیم سولفاته و سدیم کلروره را نشان دادند. جهت ارزیابی خورندگی و رسوب‌گذاری نمونه‌ها، شاخص‌های مختلفی شامل LSI،RSI،PSI،AIوS&DSIبرای رسوب‌گذاری کلسیم کربنات و شاخص‌های L&SI و Skillman برای رسوب‌گذاری سولفات‌ها به‌ویژه کلسیم و سولفات محاسبه شدند.نتایج نشان داد اکثر نمونه‌های آب به­دلیل سختی و قلیایت بالا رسوب‌گذار بوده و پساب‌ها در بیش­تر موارد خورنده بودند. بر این اساس تمام نمونه‌های آب و پساب برای استفاده در صنعت کیفیت مطلوبی نداشتند. با استفاده از نتایج حاصل از مطالعات هیدروژئوشیمیایی مشخص شد مکانیسم تبخیر، حضور کانی‌های تبخیری در مسیر جریان آب مانند ژیپس و انیدریت، وجود سازندهای کربناته و انحلال آن‌ها از مهم‌ترین پارامترهای کنترل‌کننده محتوای یونی منابع آب هستند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of Corrosion and Scaling of Water Resources and Wastewater of Shahid Hashemi Nezhad Gas Refinery

نویسندگان [English]

  • Maryam Tajbakhshian 1
  • Mohammad Hossein MahmudyGharaie 2
  • Asadollah Mahboubi 3
  • Sayyed Reza Moussavi Harami 3

1 M. Sc. Alumni, Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad,, Mashhad,, Iran

2 Assoc. Professor, Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

3 Professor, Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

چکیده [English]

In this study, 18 surface and groundwater samples and 5 wastewater samples were analyzed to assess water recourses and wastewater quality at Shahid Hashemi Nezhad Gas Refinery region in terms of corrosion and scaling. The parameters measured were pH, EC, temperature, and concentration of major ions, including K+, Na +, Ca2+, Mg2+, SO42, Cl, HCO3- and CO32,. Majority of the water samples showed Na+- SO42- and Na+-Cl- type and face by Piper diagram. To assess corrosion and scaling of the samples, various indices were calculated including LSI, RSI, PSI, AI and S&DSI for CaCO3 deposition, and L&SI and Skillman for sulfates deposition especially CaSO4. The results showed most of the water samples had scale forming due to high hardness and alkalinity, and the wastewater samples were often corrosive and therefore, all of the samples did not have favorable quality for industrial uses. The results of hydrogeochemical studies indicated evaporation, evaporative minerals such as gypsum and anhydrite in the water flow path, carbonate formations and their dissolution were the most important parameters in controlling ionic content of the water resources.

کلیدواژه‌ها [English]

  • Gas Refinery
  • Hardness
  • Hydrogeochemical
  • Type and Face
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