Effect of Mn(II) on Tetracycline Degradation by a Selected Strain Burkholderia sp.

Removal of residual tetracycline (TC) in the environment is an important issue for pollution control. In this study, a TC-degrading strain named JX_1 was isolated from the soil around an industrial park, the strain was identified as Burkholderia sp. by 16s rDNA sequencing analysis. The effects of various factors on TC degradation by the strain were studied, results indicated that the inoculation amounts and liquid volume had little effect on TC degradation rate. However, the degradation rate of TC by strain increased with the increase of pH, and the residual concentration increased gradually with the initial TC concentration increased. The degradation rate of 125 mg/L TC by strain JX_1 was 75.76 % under the conditions of temperature 37 °C, 2 mL inoculation amount and 200 mL liquid volume. Under the same conditions, the degradation rate of TC was increased to 91.39 % with the addition of 0.75 g/L MnSO₄, indicating that Mn(II) could improve the degradation rate of TC by strain JX_1 to a certain extent.