بررسی کارایی کاهش سختی‌ آب (کلسیم و منیزیم) با استفاده از رزین‌های کاتیونی قوی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد آبیاری و زهکشی، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.

2 استادیار، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

3 مربی، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

چکیده

با توجه به هزینه بالای ناشی از تصفیه آب به‌وسیله مواد شیمیایی، تصفیه توسط روش‌های کم‌هزینه بسیار مهم است. در این پژوهش برای بررسی توانایی رزین‌های کاتیونی در امر تصفیه از چهار نوع رزین کاتیونی قوی شاملPurolite C100، Purolite C100E، Trilite SCR-B وDowex Marathon C  به‌عنوان سختی­زدا با مقادیر 3، 5، 8 و 10 لیتر برای کاهش یون‌های کلسیم و منیزیم ایستگاه آب‌رسانی روستای ذغال منزلشهرستان جویبار استان مازندران استفاده گردید. در این تحقیق اثر نوع و مقدار رزین بر میزان حذف کلسیم و منیزیم آب به صورت آزمایش­های فاکتوریل در قالب طرح کاملاً تصادفی بررسی شد. نتایج نشان داد رزین Dowex Marathon C به میزان 3 لیتر دارای بیشترین راندمان حذف به میزان 1/16 و 5/21 درصد به ترتیب برای منیزیم و کلسیم می­باشد. رزین Trilitle SCR-B نیز دارای راندمان حذف عناصر منیزیم و کلسیم به میزان 4/37 و 5/42 درصد در حجم 5 لیتر و 6/51 و 3/60 درصد در حجم 8 لیتر می‌باشد. همچنین در حجم 10 لیتر، رزین Purolitle C100e با 66 درصد بیشترین راندمان حذف منیزیم و رزین Trilitle SCR-B با 6/77 درصد بیشترین راندمان حذف عنصر کلسیم را در بین تمامی جاذ‌ب‌ها به خود اختصاص داده‌اند. در نهایت می­توان گفت که رزین Trilite SCR-B با کمترین میزان سختی کلسیمی و منیزیمی (به ترتیب 36 و 16 میلی‌گرم بر لیتر) در آب و بیشترین تأثیر در کاهش سختی برای استفاده در سیستم تصفیه آب شهرستان جویبار توصیه می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Water Hardness Reduction (Ca+Mg) using Strong Cationic Resins

نویسندگان [English]

  • Yasin Nasrollahi 1
  • Mojtaba Khoshravesh 2
  • Ghasem Aghajani Mazandarani 3
1 MSc student of Irrigation and Drainage, Faculty of Agricultural Engineering, Water Engineering Department, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
2 Assistant Professor, Water Engineering Department, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
3 Instructor, Water Engineering Department, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
چکیده [English]

Due to the high cost of water treatment by chemicals, low cost methods of refinement are very important. In this study, four types of strong cationic resins including Purolite C100, Purolite C100E, Trilite SCR-B and Dowex Marathon C as softening with different levels of 3, 5, 8 and 10 liters used to reduce Ca and Mg ions in Water Supply Station of the Coal Village House in Juybar city, Mazandaran province. In this study, Factorial experiments carried out in a completely randomized design to investigate the effect of different types and amounts of resins on Ca and Mg reduction in water. The results showed that the three liters of Dowex Marathon C resin have the highest removal efficiency of 16.1 and 21.5%, respectively, for magnesium and calcium. In addition, the five liters of Trilitle SCR-B resin have the removal efficiency of 37.4% and 42.5% for Mg and Ca, respectively. The eight liters of Trilitle SCR-B resin have the removal efficiency of 51.6% for magnesium and 60.3% for calcium. The highest removal efficiency of Mg (66%) and Ca (77.6%) obtained by using 10 liters Purolitle C100e and Trilitle SCR-B resins, respectively. Finally, it can be said that the Trilite SCR-B resin with the lowest calcium and magnesium hardness in the water (36 and 16 mg/l respectively) and the most effectiveness on hardness reduction is suggested to be used in the water treatment system of Juybar city.

کلیدواژه‌ها [English]

  • Cationic exchange resins
  • hardness
  • sedimentation
  • Adsorption
  • TDS
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