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Effect of Mn(II) on tetracycline degradation by a selected strain Burkholderia sp.

Jiao Chaoxing, Xiong Hongbin, Zhou Benjun

Ecological Chemistry and Engineering. S

2023

Vol. 30, nr 3

417--427

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.

Complexes of Mn(II), Cu(II) and Cd(II) with Bipyridine Isomers and Lactates

Czakis-Sulikowska D., Malinowska A., Kafarska K.

Polish Journal of Chemistry

2006

Vol. 80, nr 12

1945-1958

The new mixed-ligand complexes containing bipyridine isomers and lactates with formulae Mn(2,4'-bpy)2(lact)2'2H2O, Cu(2,4'-bpy) 2(lact)2, Cd(2,4'-bpy)2(lact)2 . 2H2O, Cd(4-bpy)(lact)2 . 2H2O (where: 2,4_-bpy = 2,4'-bipyridine, 4-bpy = 4,4 '-bipyridine, lact = CH3 CH(OH)COO-) were obtained. These complexes and metal lactates Mn(lact)2 . 2H2O, Cu(lact)2 . 2H2O and Cd(lact)2źH2O were characterized by elemental analysis, IR, conductivity and magnetic measurements. The thermal behaviour of all compounds was studied by thermal analysis (TG, DTG, DTA) in air. A coupled TG/MS system was used to analyse the principal volatile products of thermolysis and fragmentation processes of Cu(II) compounds in air and argon.

Synthesis, Properties and Thermal Decomposition of Bipyridine-Oxalato Complexes with Mn(II), Co(II), Ni(II) and Cu(II)

Czakis-Sulikowska D., Malinowska A., Radwańska-Doczekalska J.

Polish Journal of Chemistry

2000

Vol. 74, nr 5

607-614

New mixed-ligand complexes of the following stoichiometric formulae. They have been characterized by IR and VIS spectra and thermoanalysis in air. The central atoms M(II) form coordinate bonds with title ligands.