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New Isolated Extremophiles Arsenic Oxidizing Bacteria For the Removal of Arsenic From High- and Low-Cod Media
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نویسنده
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Fatemi Azadeh Zahra ,Tabatabaei Mohammad ,Derakhshandeh Abdollah ,Borghei Seyd Mehdii ,Noshadi Masoud
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منبع
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آب و فاضلاب - 1400 - دوره : 32 - شماره : 5 - صفحه:61 -69
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چکیده
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There is an urgent need for the removal of arsenic (as) from groundwater and wastewater as it is a very hazardous heavy metal for human and environmental health. in this research, asresistant and oxidizing bacteria were isolated from the maharloo lake (27 km southeast of shiraz city) and identified to a great extent. three isolated bacillusshaped strains (called f5, f6 and f7) tolerated up to 1 m asnao2, grew up to 3.5 m nacl and ph 12, and consumed nascn and na2s2o3. the molecular analysis confirmed the originality of the strains to a high extent. the as absorption rate by these bacteria was measured by the atomic absorption method, and their effect was examined on a water sample from the south of kerman city (iran) and a synthetic wastewater sample with a chemical oxygen demand (cod) of about 180,000 kg/m3 that was able to absorb high levels of arsenic.
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کلیدواژه
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Extremophile ,Arsenic ,Industrial Wastewater ,Alkaliphilic ,Maharloo Lake
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آدرس
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Shiraz University, School Of Veterinary Medicine, ایران, Shiraz University, School Of Veterinary Medicine, ایران, Shiraz University, School Of Veterinary Medicine, ایران, Sharif University Of Technology, School Of Chemical And Petroleum Engineering, ایران, Shiraz University, School Of Agriculture, ایران
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پست الکترونیکی
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noshadi@shirazu.ac.ir
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New Isolated Extremophiles Arsenic Oxidizing Bacteria for the Removal of Arsenic from High- and Low-COD Media
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Authors
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Derakhshandeh Abdollah ,Fatemi Azadeh Zahra ,Noshadi Masoud ,Tabatabaei Mohammad ,Borghei Seyd Mehdii
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Abstract
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There is an urgent need for the removal of arsenic (As) from groundwater and wastewater as it is a very hazardous heavy metal for human and environmental health. In this research, Asresistant and oxidizing bacteria were isolated from the Maharloo Lake (27 km southeast of Shiraz city) and identified to a great extent. Three isolated bacillusshaped strains (called F5, F6 and F7) tolerated up to 1 M AsNaO2, grew up to 3.5 M NaCl and pH 12, and consumed NaSCN and Na2S2O3. The molecular analysis confirmed the originality of the strains to a high extent. The As absorption rate by these bacteria was measured by the atomic absorption method, and their effect was examined on a water sample from the south of Kerman city (Iran) and a synthetic wastewater sample with a chemical oxygen demand (COD) of about 180,000 kg/m3 that was able to absorb high levels of arsenic.
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Keywords
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Extremophile ,ARSENIC ,Industrial Wastewater ,Alkaliphilic ,Maharloo Lake
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