重金属对酵母菌降解多环芳烃的影响
Industrial Safety and Environmental Protection（2014）
Abstract
研究了重金属(Cu2+、Zn2+、Pb3+、Cr3+)对解脂耶氏酵母菌(Yarrowia lipolytica,Tzyx3)生长及其降解多环芳烃(PAHs)的影响.菌落计数表明,经过驯化的酵母在重金属环境中生长较好,Tzyx3对Cu2+和Zn2+耐受力强,对Pb3+和Cr3+也有较好的适应能力.重金属对PAHs降解的影响具有一定的差异性,萘、菲受此影响较少,荧蒽降解率不降反升,而重金属对芘的降解有抑制作用.降解15 d后,重金属存在下Tzyx3对PAHs的降解具有较好的效果,萘、菲、荧蒽、芘的降解率分别为89.75％、88.55％、68.40％和64.15％.
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Key words
polycyclic aromatic hydrocarbons,yeast,aromatic hydrocarbons,degradation,heavy metals
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