Biotransformation at 10 degrees C of di-n-butyl phthalate in subsurface microcosms

被引：15

作者：

Chauret, C ^{[1
]}

Inniss, WE ^{[1
]}

Mayfield, CI ^{[1
]}

机构：

[1] UNIV WATERLOO,DEPT BIOL,WATERLOO,ON N2L 3G1,CANADA

来源：

GROUND WATER | 1996年 / 34卷 / 05期

关键词：

D O I：

10.1111/j.1745-6584.1996.tb02072.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Di-n-butyl phthalate (DBP) was found to be transformed by microorganisms under aerobic and anaerobic conditions at 10 degrees C in microcosms simulating the Canadian Forces Base (CFB) Borden subsurface environment. Biotransformation of DBP was observed under aerobic, nitrate-reducing, Fe(III)-reducing, and sulfate-reducing conditions. The biotransformation of DBP in the microcosms was significantly decreased as the redox potential was lowered, especially under sulfate-reducing conditions. However, other factors such as nutrient depletion and buildup of toxic intermediates could have affected the biotransformation rates. The highest DBP biotransformation rate (0.57 mu g DBP.g sediment(-1).day(-1)) was observed under aerobic conditions whereas the lowest rate (0.05 mu g DBP.g sediment(-1).day(-1)) was under sulfate-reducing conditions. Biotransformation of DBP at 10 degrees C was significantly enhanced by the addition of 10 mM NaNO3 suggesting that both the addition of nitrate and high redox conditions favor its biotransformation in subsurface environments.

引用

页码：791 / 794

页数：4

共 26 条

[1] DEGRADATION OF PHTHALIC ACIDS BY DENITRIFYING, MIXED CULTURES OF BACTERIA [J].