金属离子对嗜热菌BF80生长及苯酚降解的影响研究

Effect of Metal Ions on Cell Growth and Phenol Degradation of a Thermophilic Strain BF80

摘要:

探测了17种金属离子对嗜热菌BF80菌生长和降解苯酚的影响。结果表明：与对照相比, 0.01%的Cu2+、Zn2+、Co2+、Ba2+、Hg2+、Ni2+、Ag+ 和Al3+对嗜热菌BF80有强抑制作用; Cr2+对嗜热菌BF80的苯酚降解特性有强抑制作用, 而其生长量只受到一定的抑制作用; Sn2+、Fe2+、Fe3+和Pn2+ 对嗜热菌BF80的生长和苯酚降解有一定抑制作用, 该作用随金属粒子浓度的增加而增大; 低浓度Mn2+ 和Mo2+可以使其生长量增大且促进苯酚降解, 但超过0.1%的浓度则抑制其生长; Ca2+ 和Mg2+可以加速嗜热菌BF80的生长和降解苯酚的速率, 但对苯酚的最大降解率却几乎没有影响; Mo2+ 和Mn2+的复合作用使嗜热菌BF80的生长量更大, 但是苯酚降解率却比分别单独添加Mo2+ 和Mn2+时低。

Abstract:

The effect on the growth and phenol degradation of the thermophilic strain BF80 by seventeen different metal ions were studied. The results showed that the metal ions certainly affected the growth and phenol degradation of the strain BF80. At the concentration of 0.01%, contrasting to the comparison, the growth and phenol degradation of the strain BF80 were restrained intensively by the metal ions of Cu2+, Zn2+, Co2+, Ba2+, Hg2+, Ni2+, Ag+, Al3+. The metal ions of Cr2+ restrained the phenol degradation of BF80 strongly while Cr2+ restrained the growth of BF80 faintly. The metal ions of Sn2+, Fe2+, Fe3+, Pn2+ restrained the growth and phenol degradation of the strain BF80 at a certain concentration, and the effect of inhibition increased with the increase of the concentrations of the metal ions. At the low concentration of Mn2+ or Mo2+, the growth and phenol degradation of the strain BF80 were increased, but if the concentration beyond the 0.1%, the growth and phenol degradation of the strain BF80 were inhibited. At the different concentration of Ca2+ or Mg2+, the growth of the strain BF80 were increased and the phenol degradation were accelerated, but the max rate of phenol degradation by BF80 was not influenced obviously. When the medium was added the mixture of metal ions of Mo2+ and Mn2+, the strain BF80 grew better, but the rate of the phenol degradation was lower than that of single Mo2+ and Mn2+.