SCREENING AND CHARACTERISTIC ANALYSIS OF Mn(Ⅱ) OXIDIZING BACTERIA AND ITS REMOVAL EFFECT ON ARSENIC(Ⅲ)

LIU Liangfeng; WANG Yanan; ZHANG Yanru; WANG Huawei; SONG Jing; SUN Yingjie; SHI Han; WANG Qingzhao

doi:10.13205/j.hjgc.202305005

Volume 41 Issue 5

May 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(5): 30-38

LIU Liangfeng, WANG Yanan, ZHANG Yanru, WANG Huawei, SONG Jing, SUN Yingjie, SHI Han, WANG Qingzhao. SCREENING AND CHARACTERISTIC ANALYSIS OF Mn(Ⅱ) OXIDIZING BACTERIA AND ITS REMOVAL EFFECT ON ARSENIC(Ⅲ)[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 30-38. doi: 10.13205/j.hjgc.202305005

Citation:

LIU Liangfeng, WANG Yanan, ZHANG Yanru, WANG Huawei, SONG Jing, SUN Yingjie, SHI Han, WANG Qingzhao. SCREENING AND CHARACTERISTIC ANALYSIS OF Mn(Ⅱ) OXIDIZING BACTERIA AND ITS REMOVAL EFFECT ON ARSENIC(Ⅲ)[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 30-38. doi: 10.13205/j.hjgc.202305005

Citation:

LIU Liangfeng, WANG Yanan, ZHANG Yanru, WANG Huawei, SONG Jing, SUN Yingjie, SHI Han, WANG Qingzhao. SCREENING AND CHARACTERISTIC ANALYSIS OF Mn(Ⅱ) OXIDIZING BACTERIA AND ITS REMOVAL EFFECT ON ARSENIC(Ⅲ)[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 30-38. doi: 10.13205/j.hjgc.202305005

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SCREENING AND CHARACTERISTIC ANALYSIS OF Mn(Ⅱ) OXIDIZING BACTERIA AND ITS REMOVAL EFFECT ON ARSENIC(Ⅲ)

doi: 10.13205/j.hjgc.202305005

1. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China;
2. Dongying Municipal Service Centre, Dongying 257091, China

Received Date: 2022-06-08

Abstract

Abstract

Three new strains of high-efficient manganese-oxidizing bacteria were isolated, and named Acidovorax facilis WHW-1, Acinetobacter bereziniae WHW-2 and Pantoea dispersa WHW-3 by pedigree identification. The manganese oxidation ability of the three strains and the characteristics of biogenic Mn oxide (BMO) induced in situ were studied systematically. The effect and mechanism of different initial Mn(Ⅱ) concentrations and As(Ⅲ) concentrations on the removal of As(Ⅲ) by BMO were studied. The results showed that: 1)when the inoculation ratio of bacteria was 2% and the initial Mn(Ⅱ) concentration of the system was 65 mg/L, the three manganese-oxidizing bacteria grew well. After two weeks of culturing, the induced BMO concentrations of WHW-1, WHW-2 and WHW-3 reached 0.95, 0.76 and 0.53 mg/L, respectively; 2)when the inoculation ratio of bacteria was 2% and the initial Mn(Ⅱ) concentration of the system was 15, 40, 65 and 100 mg/L, the BMO induced by the three kinds of bacteria increased with the increase of manganese concentration in a certain range, and a too high manganese concentration would inhibit the formation of BMO; 3)when the inoculation ratio of bacteria was 2%, the concentration of Mn(Ⅱ) was 65 mg/L, and the concentration of As(Ⅲ) was 1 to 5 mg/L, the removal efficiency of As(Ⅲ) by BMO formed in situ was 97% above. Microscopic analysis showed that the removal of As (Ⅲ) by three kinds of bacteria was mainly caused by the adsorption and coprecipitation of Fe-Mn oxides. In summary, the three strains of manganese oxidizing bacteria can be used in the remediation of As contaminated water environment.
- Mn(Ⅱ) oxidizing bacteria,
- biogenic Fe-Mn oxide (BMO),
- arsenic pollution,
- co-precipitation,
- adsorption effect

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References(28)

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