نوع مقاله: مقاله پژوهشی

نویسندگان

1 دکتری علوم و مهندسی آبخیزداری، دانشکده منابع طبیعی و کویر شناسی، دانشگاه یزد

2 دانشیار و عضو هیئت علمی دانشکده منابع طبیعی و کویرشناسی، دانشگاه یزد.

3 استاد و عضو هیئت علمی دانشکده کشاورزی، بخش مهندسی گیاهپزشکی دانشگاه شهید باهنر کرمان.

4 رئیس بخش آب و محیط زیست واحد تحقیقات و توسعه، مجتمع مس سرچشمه کرمان.

10.22055/jise.2017.20887.1498

چکیده

امروزه معضل کم‌آبی و محدودیت منابع آبی و همچنین حجم بالای تبخیر و هدررفت آب، باعث شده تا اهمیت روش‌های کاربردی مبنی بر کاهش میزان تبخیر از مخازن کوچک و بزرگ در سراسر دنیا روز به روز برجسته­تر ‌گردد. در تحقیق حاضر از یک روش شیمیایی جدید به‌منظور کاهش میزان تبخیر از سطح منابع آب شرب و پساب سد باطله مجتمع مس سرچشمه استفاده شده است. در این روش با استفاده از رزین پلی ونیل بوتیرال به همراه الکل‌های چرب هگزادکانول و اکتادکانول ترکیبی جدید جهت کاهش میزان تبخیر ارائه شده است. به این منظور، با حل پودر جامد این رزین در حلال کلروفورم و پخش آن در سطح آب یک لایه پلیمری تشکیل می‌شود که این لایه مانع از خروج مولکول­های سطح آب و تبخیر می‌شود. علاوه بر این حضور لایه پلیمری فوق در سطح آب می‌تواند به‌عنوان بستر پخش الکل‌های چرب نیز استفاده گردد. نتایج به‌دست‌آمده از تحقیق فوق نشان می‌دهد، ترکیب رزین پلی ونیل بوتیرال با الکل­های چرب نتایج بهتری را نسبت به استفاده خالص از این مواد ارائه می­دهد. نتایج پژوهش حاضر میزان کاهش تبخیر بر روی دو نمونه آب شرب و پساب با استفاده از ترکیب دو ماده فوق را به ترتیب 23/59 و 67/46 درصد نشان می­دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Conservation of Open Water Resources and Wastewater using a Mixture of Polyvinyl Butyral Resin and Fatty Alcohols

نویسندگان [English]

  • Hamideh Afkhami 1
  • Hossain Malekinezhad 2
  • Gholam Hossain Shahidi Bonjar 3
  • Esmat Esmailzadeh 4

1 Ph.D Gratuate, Faculty of Natural Resources, Yazd University

2 Associate Professor, Natural Resources and Desertification Department, Yazd University.

3 Professor, Agriculture Department, Shahid Bahonar University of Kerman.

4 Head of Water and Environment Division, Research and Development Unit, Sarcheshmeh Kerman Copper Complex.

چکیده [English]

Today, the problems of water scarcity, limited water resources, high volume of evaporation, and water losses have highlighted the importance of ways to reduce the rate of evaporation from small and large reservoirs. In order to increase water supplies, reducing losses through evaporation have been investigated both in theoretical aspects and in practical applications in a number of countries (Ali et al., 2011; Barnes, 2008; Coleman, 2000). One of the most important methods for water conservation is the application of chemical films for reducing evaporation from open water resources such as reservoirs, lakes, and the like (Craig et al., 2007). These applications are especially important in arid and semiarid areas for the purpose of reducing evaporation rates from water surfaces. Most materials suggested by researchers for reduced evaporation have been the fatty alcohols containing 14 to 22 carbon atoms, such as Tetradecanol (C14), Pentadecanol (C15), Xadecanol (C16), Heptadecanol (C17), Octadecanol (C18), Nonadecanol (C19), Eicosanol (C20), Heneicosanol (C21), and Docosanol (C22).The two most favoured compounds used for evaporation control are Hexadecanol (C16H33OH) and Octadecanol (C18H35OH) although more complex variants are currently in development since they offer high resistance to water evaporation. In fact, small flakes of the solid alcohol spread spontaneously to form monolayers with a high molecular packing density (Manges and Crow, 1966). In this study, a new chemical method has been used to reduce the rate of evaporation. A new combination is made from polyvinyl butyral resin and Hexadecanol and Octadecanol as two fatty alcohols to reduce of evaporation from surface water sources and wastewater tailings dam of Sarcheshmeh Copper Complex.

کلیدواژه‌ها [English]

  • Evaporation
  • Reducing Evaporation Coating
  • Sarcheshmeh Copper Complex
  • Water Loss
  • Water Shortage

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