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شماره ركورد
21872
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شماره راهنما(اين فيلد مربوط به كارشناس ميباشد لطفا آن را خالي بگذاريد)
21872
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پديد آورنده
احسان عليزاده
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عنوان
مطالعه آزمايشگاهي عوامل موثر بر سنتز هيدروكسيد نيكل نانوساختار به منظور جذب رنگ قرمز كنگو
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مقطع تحصيلي
كارشناسي ارشد
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رشته تحصيلي
صنايع شيميايي معدني
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تاريخ دفاع
1398/8/28
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استاد راهنما
دكتر رضا نوروزبيگي
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دانشكده
مهندسي شيمي، نفت و گاز
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چكيده
اﺳﺘﻔﺎده از ﺟﺎذبﻫﺎ و ﻣﮑﺎﻧﯿﺴﻢ ﺟﺬب ﺳﻄﺤﯽ ﯾﮑﯽ از روشﻫﺎي ﻣﺘﺪاول در ﺣﺬف آﻻﯾﻨﺪهﻫﺎي رﻧﮕﯽ از آب ﻣﯽﺑﺎﺷﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﻫﯿﺪروﮐﺴﯿﺪ ﻧﯿﮑﻞ ﺑﺎ روش ﻫﯿﺪروﺗﺮﻣﺎل ﺳﻨﺘﺰ ﺷﺪ و ﻗﺎﺑﻠﯿﺖ آن در ﺣﺬف رﻧﮓ ﻗﺮﻣﺰ ﮐﻨﮕﻮ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. در اﯾﻦ ﺳﻨﺘﺰ ﺑﺮاي اوﻟﯿﻦ ﺑﺎر از ﺗﺮﮐﯿﺒﯽ از ﭘﺮوﭘﯿﻠﻦ ﮔﻼﯾﮑﻮل و آب ﺑﻪ ﻋﻨﻮان ﻣﺤﯿﻂ واﮐﻨﺶ اﺳﺘﻔﺎده ﺷﺪ. اﺳﺘﻔﺎده از ﮔﻠﻮﮐﺰ ﻧﯿﺰ ﺑﻪ ﻋﻨﻮان ﻣﺎده اﻓﺰودﻧﯽ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﻗﺮار ﮔﺮﻓﺖ. در اﯾﻦ ﭘﮋوﻫﺶ ﺑﺮاي ﮐﺎﻫﺶ ﺗﻌﺪاد آزﻣﺎﯾﺶﻫﺎ و ﺑﺮرﺳﯽ ﺳﯿﺴﺘﻤﺎﺗﯿﮏ اﺛﺮ ﺑﺮﺧﯽ ﻓﺎﮐﺘﻮرﻫﺎي اﺳﺎﺳﯽ، از روش ﻃﺮاﺣﯽ آزﻣﺎﯾﺶ ﺗﺎﮔﻮﭼﯽ اﺳﺘﻔﺎده ﺷﺪ و ﺳﻄﺢ ﺑﻬﯿﻨﻪ ﺑﺮاي ﺗﻤﺎﻣﯽ ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﻣﺸﺨﺺ ﺷﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﻣﺎﮐﺰﯾﻤﻢ ﻣﯿﺰان ﺣﺬف درﻣﻮرد ﺟﺎذﺑﯽ رخ ﻣﯽدﻫﺪ ﮐﻪ در ﺳﻨﺘﺰ آن ﻧﺴﺒﺖ ﺣﺠﻤﯽ ﭘﺮوﭘﯿﻠﻦ ﮔﻼﯾﮑﻮل ﺑﻪ آب 0/1 و ﻧﺴﺒﺖ ﮔﻠﻮﮐﺰ ﺑﻪ ﻧﯿﮑﻞ ﻧﯿﺰ 0/1 ﺑﺎﺷﺪ. ﺑﻪﻣﻨﻈﻮر ﻣﺸﺨﺼﻪﯾﺎﺑﯽ ﺟﺎذب ﺑﻬﯿﻨﻪ، آﻧﺎﻟﯿﺰﻫﺎي ﭘﺮاش ﭘﺮﺗﻮ اﯾﮑﺲ (XRD)، ﺗﺒﺪﯾﻞ ﻓﻮرﯾﻪ-ﻣﺎدن ﻗﺮﻣﺰ (FT-IR)، ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮون روﺑﺸﯽ (SEM) و آﻧﺎﻟﯿﺰ ﺟﺬب و دﻓﻊ ﮔﺎز ﻧﯿﺘﺮوژن (BET) ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. ﻧﺘﺎﯾﺞ آﻧﺎﻟﯿﺰ XRD ﻧﺸﺎن داد ﮐﻪ ﻫﯿﺪروﮐﺴﯿﺪ ﻧﯿﮑﻞ ﺳﻨﺘﺰ ﺷﺪه درﺣﺎﻟﺖ ﺑﻬﯿﻨﻪ، داراي ﻓﺎز آﻟﻔﺎ ﺑﻪ ﺻﻮرت ﺧﺎﻟﺺ ﻣﯽﺑﺎﺷﺪ. وﻟﯽ در ﺣﺎﻟﺘﯽ ﮐﻪ ﻣﯿﺰان ﭘﺮوﭘﯿﻠﻦ ﮔﻼﯾﮑﻮل از ﺣﺎﻟﺖ ﺑﻬﯿﻨﻪ ﺑﯿﺶﺗﺮ ﺷﺪه و از ﮔﻠﻮﮐﺰ ﻧﯿﺰ اﺳﺘﻔﺎده ﻧﺸﻮد، ﺗﺮﮐﯿﺒﯽ از ﻓﺎزﻫﺎي آﻟﻔﺎ و ﺑﺘﺎ اﯾﺠﺎد ﻣﯽﺷﻮد. ﻫﻤﭽﻨﯿﻦ ﻣﺘﻮﺳﻂ اﻧﺪازه ﺑﻠﻮركﻫﺎ ﺑﺮاي ﻧﻤﻮﻧﻪ ﺑﻬﯿﻨﻪ 12 ﻧﺎﻧﻮﻣﺘﺮ ﺑﺪﺳﺖ آﻣﺪ. ﻧﺘﺎﯾﺞ آﻧﺎﻟﯿﺰ BET ﻧﺸﺎن داد ﮐﻪ ﻣﯿﺰان ﺳﻄﺢ وﯾﮋه ﺟﺎذب ﺑﻬﯿﻨﻪ m2/g 14/2 ميﺑﺎﺷﺪ. داده ﻫﺎي آزﻣﺎﯾﺸﮕﺎﻫﯽ ﺣﺎﺻﻞ از ﺟﺬب ﺳﻄﺤﯽ رﻧﮓ ﻗﺮﻣﺰ ﮐﻨﮕﻮ ﺗﻮﺳﻂ ﺟﺎذب ﺑﻬﯿﻨﻪ ﺑﺎ ﻣﺪلﻫﺎي ﺳﯿﻨﺘﯿﮑﯽ و ﻫﻤﺪﻣﺎﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺮازش ﺷﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﻣﺪل ﺳﯿﻨﺘﯿﮑﯽ ﺷﺒﻪ ﻣﺮﺗﺒﻪ دوم و ﻣﺪل ﻫﻤﺪﻣﺎي ﻻﻧﮕﻤﻮﯾﺮ ﺑﯿﺸﺘﺮﯾﻦ ﻣﻄﺎﺑﻘﺖ را ﺑﺎ داده ﻫﺎي آزﻣﺎﯾﺸﮕﺎﻫﯽ دارﻧﺪ. ﺑﯿﺸﯿﻨﻪ ﻇﺮﻓﯿﺖ ﺟﺬب ﺗﮏﻻﯾﻪ ﻣﺤﺎﺳﺒﻪ ﺷﺪه ﺗﻮﺳﻂ ﻫﻤﺪﻣﺎي ﻻﻧﮕﻤﻮﯾﺮ ﺑﺮاي ﺟﺎذب ﺑﻬﯿﻨﻪ، mg/g 111/2 ﺑﺪﺳﺖ آﻣﺪ.
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تاريخ ورود اطلاعات
1399/02/17
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عنوان به انگليسي
Experimental study of the factors affecting the synthesis of Nanostructured nickel hydroxide for the adsorption of Congo red
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تاريخ بهره برداري
11/18/2020 12:00:00 AM
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دانشجوي وارد كننده اطلاعات
احسان عليزاده
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چكيده به لاتين
Using adsorbents is one of the most common methods for removal of color pollutants from water. In this study, nickel hydroxide was synthesized by hydrothermal method and its ability to remove Congo red dye was investigated. For the first time, a combination of propylene glycol and water was used as the reaction medium. Addition of glucose was also studied. In this study, the Taguchi design was used to reduce the number of experiments and investigate the effect of some essential factors. The optimum levels of parameters were determined. Results showed that the maximum removal can be obtained when the volume ratio of propylene glycol to water is 0.1, and the ratio of glucose to nickel is 0.1. In order to characterize the optimum adsorbent, XRD, FT-IR, SEM and nitrogen gas adsorption and desorption (BET) analyses were carried out. The results of XRD analysis showed that nickel hydroxide synthesized under the optimum condition has pure alpha phase. When the amount of propylene glycol is more than optimal without using glucose, a combination of alpha and beta phases was made. The average crystal size of the optimum sample was 12nm. The results of BET analysis showed that the optimum adsorbent specific surface area was 14.2m2/g. The experimental data obtained from Congo red adsorption by the optimum adsorbent were fitted with different kinetic models and isotherms. The results showed that the pseudo-second-order kinetic model and the Langmuir isotherm model were the most consistent with the experimental data. The maximum monolayer adsorption capacity calculated by Langmuir isotherm for the optimum adsorbent was 111.2 mg/g.
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