水体/沉积物中蒽-铜复合污染微生物修复的初步研究

对水体/沉积物中蒽的生物降解及铜的生物吸附作用进行了研究.烟曲霉A10对蒽、铜有良好的降解、吸附能力.水体中,蒽的质量浓度为10 mg/L时,铜的质量浓度的增加导致其吸附率降低,但均处于80%以上;当铜的质量浓度处于0.60～6.09 mg/L时,蒽降解率从62.01%升至82.45%,之后随铜的质量浓度的升高而下降.沉积物中,铜的质量浓度的变化对蒽降解的影响与水体中的情况类似,但蒽降解率总体高于水中的情况;蒽质量浓度的增加对铜吸附率无明显影响,均维持在95%以上,而蒽降解率在其初始质量浓度为5 mg/L时最大,达88.09%,之后趋于下降.一定质量浓度的铜在一定程度上对蒽降解有促进作用,但铜质量浓度过高会使降解率下降.铜吸附率和蒽降解率均随蒽质量浓度的提高而下降,其中蒽降解率降幅较大,铜吸附率只有微弱变化.

Preliminary research on bioremediation of combined contamination of anthracene and Cu in water and sediment

Biodegradation of anthracene and biosorption of Cu in water and sediment were investigated.The strain Aspergillus fumigatus A10 exhibited excellent ability of anthracene degradation and Cu sorption.When the concentration of anthracene in water was 10 mg/L,the biosorption rate of Cu decreased with its increasing concentration,but all exceeded 80%.On the other side,the biodegradation rate of anthracene rose from 62.01% to 82.45% with the concentration of Cu ranging from 0.60 mg/L to 6.09 mg/L,then,the biodegr...