استفاده از نانو ذرات خاک رس و هیدروکسیدهای لایه‌ای دوگانه MgAl-CO3 در نمک‌زدایی از آب دریا

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد سازه‌های آبی، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

2 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

3 استادیار گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران

چکیده

امروزه افزایش جمعیت و کاهش منابع آب شرب موجب شده است که استفاده از آب دریا به‌عنوان یک منبع جدید آبی معرفی شود و نمک‌زدایی از  آن با استفاده از روش‌های جدید از جمله نانوذرات مورد توجه قرار گیرد. رس‌های معدنی مانند بنتونیت با قابلیت تبادل کاتیونی می‌توانند کاتیون‌های خود از جمله کلسیم و منیزیم را با یون‌های سدیم آب دریا مبادله کنند. در این پژوهش به‌منظور انجام آزمایش‌های نمک‌زدایی از آب دریا، از رس بنتونیت کلکته زنجان استفاده شد و روند کاهش یون سدیم با استفاده از دستگاه نشر شعله مورد مطالعه قرار گرفت. نتایج استفاده از 5/5 گرم بنتونیت با سرعت اختلاط rpm200، به‌مدت 15 دقیقه در 20 میلی‌لیتر آب دریا به‌عنوان شرایط بهینه اختلاط بنتونیت و آب دریا معرفی شد. از طرفی به‌منظور کاهش یون‌های کلرید موجود در آب دریا، نانو ساختار هیدروکسید لایه‌ای دوگانه MgAl-CO3 در آزمایشگاه کیفیت آب دانشگاه زنجان سنتز و مورد استفاده قرار گرفت. نتایج نشان داد شرایط بهینه اختلاط، شامل استفاده از 25/1 گرم LDH با سرعت اختلاط rpm200، به‌مدت 10 دقیقه، در 5 میلی‌لیتر آب دریا است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Desalination of Seawater Using Nano Clays and MgAl- CO3 Layered Double Hydroxides

نویسندگان [English]

  • Niloufar Hamzelou 1
  • Hesam Ghodousi 2
  • Bahman Farajmand 3
1 MSc Student of Hydro Structures, Department of Water Engineering, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Assist. Prof., Department of Water Engineering, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3 Assist. Prof., Department of Chemistry, Faculty of Sciences, University of Zanjan, Zanjan, Iran
چکیده [English]

Nowadays, increasing population and reducing fresh water resources, needs to introduce seawater as a new water source and sweetening it using new techniques including nanoparticles considered. Mineral clays, such as cationic exchangeable bentonite clays, can exchange their own cations, including calcium and magnesium, with sodium ions of sea water. In this research, Kalkate's bentonite clay was used for seawater sweetening testing and the flame photometer device was used to measure the process of reducing sodium ion from seawater. The results showed using 5.5 gr bentonite with 200 rpm mixing velocity, in a contact time of 15 minute in 20 ml sea water is the optimal conditions for mixing bentonite and seawater. On the other hand, in order to reduce the chloride ions from seawater, MgAl-CO3 layered double hydroxides nanoparticles, was synthesized and used in water quality laboratory of the University of Zanjan. The results of  this experiments also showed using of 1.25 gr LDH with 200 rpm mixing velocity, in a contact time of 10 minute in 5 ml seawater is the optimal mixing conditions.

کلیدواژه‌ها [English]

  • Bentonite
  • Cationic Exchange
  • Desalination
  • nano particles

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