تعيين شرايط بهينه ي حذف متيل ارانژ از محلول هاي آبي توسط نانو ذره Ag, Co/TiO2 به روش طراحي آزمايش

Evaluation of Optimization Removal of Methyl Orange from Aqueous Solutions with Ag, Co/TiO2 Nano-Particles by Experimental Design

ﭼﮑﯿﺪه زﻣﯿﻨـﻪ و ﻫـﺪف : در ﺑﺮرﺳــﯽ ﻓﻌﺎﻟﯿـﺖ ﻓﺘـﻮ ﮐﺎﺗـﺎﻟﯿﺰوري ﻧــﺎﻧﻮ ذره Ag, Co/TiO2ﻓﺎﮐﺘﻮرﻫـﺎﯾﯽ ﻣﺎﻧﻨـﺪ ﻣﻘــﺪار ﻏﻠﻈـﺖ آﻻﯾﻨـﺪه، ﻣﻘــﺪار ﻓﻮﺗﻮﮐﺎﺗﺎﻟﯿﺴﺖ، pH و دﻣﺎي ﮐﻠﺴﯿﻨﺎﺳﯿﻮن از ﻋﻮاﻣﻞ ﻣﻮﺛﺮ در ﻓﺮاﯾﻨﺪ ﺣﺬف آﻻﯾﻨﺪه در ﻣﺤﻠﻮل ﻫﺎي آﺑﯽ اﺳﺖ. ﺑﺎ اﺳـﺘﻔﺎده از ﻃﺮاﺣـﯽ آزﻣـﺎﯾش اﻣﮑﺎن ﺣﺬف ﻓﺎﮐﺘﻮرﻫﺎي ﻏﯿﺮ ﺿﺮوري و ﺗﻌﯿﯿﻦ ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﺻﻮرت ﻣﯿﮕﯿﺮد. روش ﺑﺮرﺳﯽ: ﻧﺎﻧﻮ ذره Ag, Co/TiO2 ﺳﻨﺘﺰ ﺷﺪه ﺟﻬﺖ ﺣﺬف ﻣﺘﯿﻞ اراﻧﮋ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. و ﭼﻬﺎر ﻣﺘﻐﯿﺮ ﻣﺆﺛﺮ در ﻓﺮآﯾﻨﺪ ﺣـﺬف ﻣﺘﯿـﻞ اراﻧﮋ، ﺷﺎﻣﻞ ﻏﻠﻈﺖ اوﻟﯿﻪي آﻻﯾﻨﺪه، ﻣﻘﺪارﻓﺘﻮ ﮐﺎﺗﺎﻟﯿﺴﺖ، pH و دﻣﺎي ﮐﻠﺴﯿﻨﺎﺳﯿﻮن ﺑﻪ ﻋﻨﻮان ﻣﺘﻐﯿﺮﻫﺎي اﺻﻠﯽ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ و آراﯾﻪ اي ﺑﺎ 4 ﻓﺎﮐﺘﻮر در 3 ﺳﻄﺢ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ. و ﺟﻤﻌﺎً 9 آزﻣﺎﯾﺶ ﺑﺎ در ﻧﻈﺮ ﮔﺮﻓﺘﻦ ﺷﺮاﯾﻂ ﺳﻄﻮح ﺑﺮاي ﺑﻬﯿﻨﻪ ﺳﺎزي و ﺗﻌﯿﯿﻦ درﺟﻪي ﺗﺄﺛﯿﺮ ﻫﺮﯾﮏ از فاكتورها انجام گرديد ﺎﻓﺘﻪ ﻫﺎ: ﺗﺎﺛﯿﺮ ﭘﺎراﻣﺘﺮﻫﺎي ﻋﻤﻠﯿﺎﺗﯽ ﺷﺎﻣﻞ ﻏﻠﻈﺖ اوﻟﯿﻪي آﻻﯾﻨﺪه، ﻣﻘﺪار ﻓﻮﺗﻮﮐﺎﺗﺎﻟﯿﺴﺖ، pH و دﻣﺎي ﮐﻠﺴﯿﻨﺎﺳﯿﻮن ﺑﻪ ﻋﻨﻮان ﻣﺘﻐﯿﺮﻫﺎي اﺻﻠﯽ ﺑﻪ روش ﻃﺮاﺣﯽ آزﻣﺎﯾﺶ ﺑﻬﯿﻨﻪ ﺳﺎزي ﮔﺮدﯾﺪ. ﺑﺤﺚ و ﻧﺘﯿﺠﻪ ﮔﯿﺮي: ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺸﺎت ﺑﻮﺳﯿﻠﻪ ي ﻃﺮاﺣﯽ آزﻣﺎﯾﺶ روش ﺗﺎﮔﻮﭼﯽ در ﺗﺨﺮﯾﺐ ﻓﻮﺗﻮﺷﯿﻤﯿﺎﯾﯽ ﻣﺘﯿﻞ اراﻧﮋ ﻧﺸﺎن داد ﮐﻪ ﻣﻘـﺪا ر ﻏﻠﻈﺖ ﻣﺘﯿﻞ اراﻧﮋ و ﺳﭙﺲ ﻣﻘﺪار ﮐﺎﺗﺎﻟﯿﺴﺖ ﺑﯿﺶ ﺗﺮﯾﻦ ﺗﺄﺛﯿﺮ را در ﻣﯿﺎن ﻓﺎﮐﺘﻮرﻫﺎي اﻧﺘﺨﺎﺑﯽ دارﻧﺪ.

Background and objective: Studying photocatalytic activities, some factors including the concentration of the pollutant, the amount of photo-catalyst, pH, and calcination temperature affect the process of eliminating the pollutant from aquatic solutions. Using an experimental design, it is possible to eliminate the unnecessary factors and determine the optimal conditions. Method: The Ag, Co/TiO2 Nano-particles for eliminating methyl orange has been evaluated. The four main variables involved in the process of elimination of methyl orange are the original concentration of the pollutant, the doges of photo-catalyst, pH, and calcination temperature. So arraying four factors changes at 3 levels. Therefore, considering the surface conditions for optimization and for determining the effect of each factor, totally 9 experiments are needed. Findings: The effect of the operational parameters include the original concentration of the pollutant, the amount of the photo-catalyst, pH, and calcination temperature, was optimized through experimental design. Discussion and Conclusion: The results of the experiments on photochemical degradation of Methyl Orange using Taguchi method showed that the greatest effect is related to original concentration of the MO and the amount of the Nano-catalyst. Keywords: