جذب رنگ کنگورد توسط نانوذرات مغناطیسی فریت‌کبالت و فریت‌روی پوشش داده شده با پلی آنیلین

ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖﻫﺎی ﻣﻐﻨﺎﻃﯿﺴﯽ ﻓﺮﯾﺖ روی اﺻﻼح ﺷﺪه ﺑﺎ ﭘﻠﯽآﻧﯿﻠﯿﻦ4 ) (pa/znfe2o و ﻓﺮﯾﺖ ﮐﺒﺎﻟﺖ اﺻﻼح ﺷﺪه ﺑﺎ ﭘﻠﯽآﻧﯿﻠﯿﻦ4) pa/cofe2o (ﺗﻮﺳﻂ روش ﺳﻞ-ژل و ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن درﺟﺎ ﺳﻨﺘﺰ ﺷﺪﻧﺪ و ﺑﺎ ﺗﮑﻨﯿﮏﻫﺎی ﺷﻨﺎﺳﺎﯾﯽ ﻣﺨﺘﻠﻒ اﻋﻢ از ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ روﺑﺸﯽ، ﻃﯿﻒ ﺳﻨﺠﯽ زﯾﺮﻗﺮﻣﺰ، ﭘﺮاش اﺷﻌﻪی اﯾﮑﺲ و ﭘﺮاش اﻧﺮژی اﺷﻌﻪی اﯾﮑﺲ ﺷﻨﺎﺳﺎﯾﯽ ﺷﺪﻧﺪ. اﯾﻦ ﻧﺎﻧﻮ ﮐﺎﻣﭙﻮزﯾﺖﻫﺎ ﺑﺮای ﺣﺬف ﮐﻨﮕﻮرد ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﮔﺮﻓﺘﻨﺪ. اﺛﺮ ﺣﻀﻮر ﭘﻠﯽ آﻧﯿﻠﯿﻦ ﻧﯿﺰ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ و ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ وﺟﻮد ﭘﻮﺷﺶ ﭘﻠﯿﻤﺮ ﭘﻠﯽآﻧﯿﻠﯿﻦ روی ﺳﻄﺢ ﻧﺎﻧﻮذرات اﺛﺮ ﺑﺴﺰاﯾﯽ در ﻓﺮآﯾﻨﺪ ﺟﺬب ﮐﻨﮕﻮرد دارد ﮐﻪاﯾﻦ اﺛﺮ ﺑﻪ وﺟﻮد ﺑﺎرﻫﺎی ﻣﺜﺒﺖ ﺳﻄﺢ ﭘﻠﯿﻤﺮ و ﺟﺎذﺑﻪی اﻟﮑﺘﺮواﺳﺘﺎﺗﯿﮏ ﺑﺎ رﻧﮓ آﻧﯿﻮﻧﯽ ﮐﻨﮕﻮرد ﻧﺴﺒﺖ داده ﻣﯽ ﺷﻮد.ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖﻫﺎی 4) &(pa/znfe2o pa/cofe2o4) (ﺗﺤﺖ ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﺑﻪ ﺗﺮﺗﯿﺐ 90 و 97 درﺻﺪ از رﻧﮓ ﮐﻨﮕﻮرد را ﺣﺬف ﮐﺮدﻧﺪ. ﻫﺮ دو ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖ ﺗﺎ ﭼﻬﺎر ﻣﺮﺣﻠﻪ ﻗﺎﺑﻠﯿﺖ ﺑﺎزﯾﺎﺑﯽ ﻧﺸﺎن دادﻧﺪ. از ﻧﻤﻮﻧﻪﻫﺎی ﺣﻘﯿﻘﯽ ﺷﺎﻣﻞ آب ﭼﺎه و ﭘﺴﺎب رﻧﮕﺮزی ﮐﻪ ﺣﺎوی ﮐﻨﮕﻮرد ﻣﯽ ﺑﺎﺷﻨﺪ ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ ﮐﺎراﯾﯽ ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖ ﻫﺎی ﺳﻨﺘﺰ ﺷﺪه در ﺣﺬف رﻧﮓ، اﺳﺘﻔﺎده ﺷﺪ. ﻧﺘﺎﯾﺞ اﯾﻦ ﺑﺮرﺳﯽ ﻧﺸﺎن داد ﮐﻪ ﭘﯿﭽﯿﺪﮔﯽ ﺑﺎﻓﺖ ﺑﺮ ﮐﺎراﯾﯽ ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖﻫﺎ اﺛﺮ ﭼﺸﻤﮕﯿﺮی ﻧﺪارد. ﺑﻨﺎﺑﺮاﯾﻦ ﻣﯽﺗﻮان از ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖ ﻫﺎی ﺳﻨﺘﺰ ﺷﺪه ﺑﺮای ﺣﺬف ﮐﻨﮕﻮرد در ﻧﻤﻮﻧﻪﻫﺎی ﺣﻘﯿﻘﯽ ﺑﺎ ﺑﺎﻓﺖ ﭘﯿﭽﯿﺪه اﺳﺘﻔﺎده ﻧﻤﻮد.

Adsorption of Congo red dye by magnetic nanoparticles of ferrite cobalt and ferrite zinc coated with polyaniline

In this work, two magnetic nanocomposites of zinc ferrite coated with polyaniline (PA/ZnFe2O4) and cobalt ferrite coated with polyaniline (PA/CoFe2O4) were synthesized by sol-gel method and in situ polymerization. These nanocomposites were characterized by various identification techniques including SEM, FT-IR, XRD and EDX. These nanocomposites were used to remove Congo red. The effect of polyaniline presence was also investigated and the results showed that the presence of polyaniline polymer coating on the surface of nanoparticles had a significant effect on the process of adsorption of Congo red. The prepared nanocomposites could omitted the Congo red in eques solution of 50 ppm, at mild reaction condition at 180 min in pH=7 by the using of 15 mg absorbents up to 90 and 97%, respectively. Also, the synthesized nanocomposites were used to remove the Congo red from real samples including well water and dyeing wastewater. The results have been shown that the complex matrix has no any effect on nanocomposites efficacy and both nanocomposites were reusable for 4 times. Therefore, synthesized nanocomposites due to their ease of synthesis, and abundance and cheapness of raw materials are good candidates for removal of congo red in real samples and complex matrix on industrial and semi-industrial scales.