New Isolated Extremophiles Arsenic Oxidizing Bacteria for the Removal of Arsenic from High- and Low-COD Media
| Autor: | Azadeh Zahra Fatemi, Mohammad Tabatabaei, Abdollah Derakhshandeh, Seyd Mehdii Borghei, Masoud Noshadi |
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| Jazyk: | English<br />Persian |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | آب و فاضلاب, Vol 32, Iss 5, Pp 61-69 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1024-5936 2383-0905 |
| DOI: | 10.22093/wwj.2021.314968.3196 |
| Popis: | 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, As-resistant and oxidizing bacteria were isolated from the Maharloo Lake (27 km southeast of Shiraz city) and identified to a great extent. Three isolated bacillus-shaped 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. |
| Databáze: | Directory of Open Access Journals |
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