بررسي كارايي كاهش سختي آب (كلسيم و منيزيم) با استفاده از رزين هاي كاتيوني قوي

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

ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻫﺰﯾﻨﻪ ﺑﺎﻻي ﻧﺎﺷﯽ از ﺗﺼﻔﯿﻪ آب ﺑﻪوﺳﯿﻠﻪ ﻣﻮاد ﺷﯿﻤﯿﺎﯾﯽ، ﺗﺼﻔﯿﻪ ﺗﻮﺳﻂ روشﻫﺎي ﮐﻢﻫﺰﯾﻨﻪ ﺑﺴﯿﺎر ﻣﻬﻢ اﺳﺖ. در اﯾﻦ ﭘﮋوﻫﺶ ﺑﺮاي ﺑﺮرﺳﯽ ﺗﻮاﻧﺎﯾﯽ رزﯾﻦﻫﺎي ﮐﺎﺗﯿﻮﻧﯽ در اﻣﺮ ﺗﺼﻔﯿﻪ از ﭼﻬﺎر ﻧﻮع رزﯾﻦ ﮐﺎﺗﯿﻮﻧﯽ ﻗﻮي ﺷﺎﻣﻞPurolite C100، Trilite SCR-B ،Purolite C100E و Dowex Marathon C ﺑﻪﻋﻨﻮان ﺳﺨﺘﯽزدا ﺑﺎ ﻣﻘﺎدﯾﺮ 3، 5، 8 و 10 ﻟﯿﺘﺮ ﺑﺮاي ﮐﺎﻫﺶ ﯾﻮنﻫﺎي ﮐﻠﺴﯿﻢ و ﻣﻨﯿﺰﯾﻢ اﯾﺴﺘﮕﺎه آبرﺳﺎﻧﯽ روﺳﺘﺎي ذﻏﺎل ﻣﻨﺰل ﺷﻬﺮﺳﺘﺎن ﺟﻮﯾﺒﺎر اﺳﺘﺎن ﻣﺎزﻧﺪران اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. در اﯾﻦ ﺗﺤﻘﯿﻖ اﺛﺮ ﻧﻮع و ﻣﻘﺪار رزﯾﻦ ﺑﺮ ﻣﯿﺰان ﺣﺬف ﮐﻠﺴﯿﻢ و ﻣﻨﯿﺰﯾﻢ آب ﺑﻪ ﺻﻮرت آزﻣﺎﯾﺶﻫﺎي ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﮐﺎﻣﻼً ﺗﺼﺎدﻓﯽ ﺑﺮرﺳﯽ ﺷﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد رزﯾﻦ Dowex Marathon C ﺑﻪ ﻣﯿﺰان 3 ﻟﯿﺘﺮ داراي ﺑﯿﺸﺘﺮﯾﻦ راﻧﺪﻣﺎن ﺣﺬف ﺑﻪ ﻣﯿﺰان 16/1 و 21/5 درﺻﺪ ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﺮاي ﻣﻨﯿﺰﯾﻢ و ﮐﻠﺴﯿﻢ ﻣﯽﺑﺎﺷﺪ. رزﯾﻦ Trilitle SCR-B ﻧﯿﺰ داراي راﻧﺪﻣﺎن ﺣﺬف ﻋﻨﺎﺻﺮ ﻣﻨﯿﺰﯾﻢ و ﮐﻠﺴﯿﻢ ﺑﻪ ﻣﯿﺰان 37/4 و 42/5 درﺻﺪ در ﺣﺠﻢ 5 ﻟﯿﺘﺮ و 51/6 و 60/3 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 77/6 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 ﺑﺮاي اﺳﺘﻔﺎده در ﺳﯿﺴﺘﻢ ﺗﺼﻔﯿﻪ آب ﺷﻬﺮﺳﺘﺎن ﺟﻮﯾﺒﺎر ﺗﻮﺻﯿﻪ ﻣﯽﺷﻮد.

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.