不同营养条件下原始小球藻对蒽的富集和降解研究

摘要/Abstract

摘要： 研究了自养与异养条件下原始小球藻对蒽的降解和富集能力.结果表明,自养条件下,浓度为10mg·L^-1的蒽有48.18%被降解,其中28.81%属于自然光降解,仅有19.37%被原始小球藻降解.而异养条件下的原始小球藻对浓度为2.5mg·L^-1的蒽降解率达到33.53%,说明异养原始小球藻不仅能耐受高浓度蒽,而且表现出比自养原始小球藻更强的蒽降解能力.两种条件下,80%以上残留的蒽都被富集到藻细胞中.虽然自养条件下原始小球藻对蒽的生物富集系数达9064,远大于异养条件下的生物富集系数(1899),但异养条件下藻对蒽的绝对富集量(202.29μg)远远高于自养条件下的69.687μg.

Abstract: The bioaccumulation and degradation of anthracene by the green alage(Chlorella prothecoides)under autotrophic and heterotrophic conditions were studied.About 29% and 20% of anthracene(original concentration1.0mg·L^-1)were degraded by light and by Chlorella protothecoides under the autotrophic condition,respectively.About 33.53% of anthracene (original concentration2.5mg·L^-1)were degraded by C. protothecoides under the heterotrophic condition.The resistance and degradation ability of C. protothecoides under the heterotrophic condition was higher than that under the autotrophic conditions.More than80% of residual anthracene was accumulated by algal cell under the two conditions.The bioaccumulation factor were 9064 and 1899,under the autotrophic and heterotropnic conditions,respectively.The net accumulation of anthracene,however,was much higher under the heterotropnic condition (202.29μg)than that under the autotrophic condition (69.687μg).

中图分类号:

X502

严雪, 杨永清, 李永科, 沈国兴, 严国安. 不同营养条件下原始小球藻对蒽的富集和降解研究[J]. 应用生态学报, 2002, (2): 145-150.

YAN Xue, YANG Yongqing, LI Yongke, SHENG Guoxing, YAN Guoan . Accumulation and biodegradation of anthracene by Chlorella protothecoides under different trophic conditions[J]. Chinese Journal of Applied Ecology, 2002, (2): 145-150.

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