The influence of the novel composite material LiNbO₃@Fe₃O₄ on the denitrification efficiency of bacterium Achromobacter sp. A14
2021
Su, Jun feng | Zhang, Yuan ming | Bai, Xue chen | Liang, Dong hui | He, Lei | Wang, Jia xing
The effect of the novel composite material LiNbO₃@Fe₃O₄ on the nitrate removal, and Mn²⁺ oxidation efficiency by autotrophic denitrification strain Achromobacter sp. A14 was investigated in this study. The optimum conditions were tested by using five levels of initial Mn²⁺ concentrations (40, 60, 80, 100 and 120 mg/L), initial pH (5.0, 6.0, 7.0, 8.0 and 9.0) and temperature (20, 25, 30, 35 and 40°C). A maximal nitrate removal ratio of nearly 100% and a maximal Mn²⁺ oxidation ratio of 71.59% were simultaneously achieved at pH 7.0, 80 mg/L Mn²⁺ and 30°C by bacteria A14 with 300 mg/L LiNbO₃@Fe₃O₄ as catalytic material. Biomaterial cycle testing indicated that the denitrification efficiency of bacteria A14 with LiNbO₃@Fe₃O₄ remained steady after 10 batches.
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