پيوند نمودن پلي آنيلين بر روي كيتوسان و سلولز و استفاده از پليمر اصلاح شده براي حذف آرسينيك As (v) از پساب ها

Grafting of Polyaniline onto chitosan and celloluse and using of modified polymers for remove of arsenic As (v) from Wastewater

ﭘﺴﺎﺏ ﻫﺎﻱ ﺻﻨﺎﻳﻊ ﻣﺨﺘﻠﻒ ﺍﺯ ﺟﻤﻠﻪ ﺁﺑﮑﺎﺭﻱ ﻓﻠﺰﺍﺕ،ﺍﺳﺘﺨﺮﺍﺝ ﻣﻌﺪﻥ، ﺷﺎﻣﻞ ﻓﻠﺰﺍﺕ ﺳﻨﮕﻴﻨﻲ ﻣﻲ ﺑﺎﺷﺪ ﮐﻪ ﺑﺮﺍﻱ ﺍﻧﺴﺎﻥ ﻭ ﻣﺤﻴﻂ ﺯﻳﺴﺖ ﻧﮕﺮﺍﻥ ﮐﻨﻨﺪﻩ ﺍﺳﺖ. ﺑﺮﺍﻱ ﮐﺎﻫﺶ ﻣﺸﮑﻞ ﺁﻟﻮﺩﮔﻲ ﺁﺏ ﺑﺎ ﻓﻠﺰﺍﺕ ﺳﻨﮕﻴﻦ ﺭﻭﺵ ﻫﺎﻱ ﻣﺨﺘﻠﻒ ﺍﺳﺘﻔﺎﺩﻩ ﺷﺪﻩ ﺍﺳﺖ ﺍﺯ ﺟﻤﻠﻪ ﺟﺪﺍﺳﺎﺯﻱ ﺷﻴﻤﻴﺎﻳﻲ، ﻓﻴﻠﺘﺮﺍﺳﻴﻮﻥ، ﺗﺼﻔﻴﻪ ﺍﻟﮑﺘﺮﻭﺷﻴﻤﻴﺎﻳﻲ، ﺗﺒﺎﺩﻝ ﻳﻮﻧﻲ، ﺍﺳﻤﺰ ﻣﻌﮑﻮﺱ، ﺍﻧﻌﻘﺎﺩ ﻭ ﺗﻪ ﻧﺸﻴﻨﻲ ﺍﺷﺎﺭﻩ ﮐﺮﺩ، ﮐﻪ ﺑﻪ ﻃﻮﺭ ﮐﻠﻲ ﮔﺮﺍﻥ ﻳﺎ ﺑﻲ ﺍﺛﺮ ﻫﺴﺘﻨﺪ. بيوپليمر ها اميد تازه اي را در صنعت ايجاد نموده اند كه از شاخص ترين آنها ﮐﻴﺘﻮﺯﺍﻥ و سلولز مي باشد كه ﺑﻪﻋﻨﻮﺍﻥ ﻳﮏ ﭘﻠﻴﻤﺮ ﮐﺎﺗﻴﻮﻧﻲ ﻗﺎﺑﻞ ﺗﺠﺰﻳﻪ ﺯﻳﺴﺘﻲ ﻣﻄﺮﺡ است.در اين پژوهش براي حذف آرسنيك كه فلزي سنگين و بسيار سمي مي باشد ، بيوپليمرهاي كيتوسان و سلولز را با پلي آنيلين پيوند عرضي داده و از سنتز اين دو كامپوزيت توسط FTIR وSEM اطمينان حاصل شد و ميزان جذب آرسنيك را توسط دستگاه جذب اتمي ، در هر يك به طور جداگانه اندازه گيري نموده و نتايج حاصل نشان مي دهد كه كارآيي كيتوسان گرافت شده نسبت به سلولز بيشتر بوده و جذب بيشتري انجام داده است .

Various types of industrial sewage including those of metal galvanizing and mining industries include heavy metals which are a cause of concern for human health and for the environment. Various methods have been used for to reduce the problem of pollution of water with heavy metals such as chemical separation, filtering, electrochemical purification, ionic exchange, reverse osmosis, coagulation and settling down, which are, generally speaking, either expensive or ineffective. Biopolymers have caused a new hope in industry, the most notable of which are chitosan and cellulose which is a remarkable cationic bio-decomposable polymer. In this research, for removing arsenic, which is a highly toxic heavy metal, chitosan and cellulose biopolymers have been crosslinked with polyaniline and the synthesis of the two composites were verified using FTIR and SEM and the absorption of arsenic (As+5) in each one was measured separately. The results obtained indicate that the efficiency of grafted chitosan was higher compared to that of cellulose and that it had done more absorption.