RAPID TOLUENE MINERALIZATION BY AQUIFER MICROORGANISMS AT ADAK, ALASKA - IMPLICATIONS FOR INTRINSIC BIOREMEDIATION IN COLD ENVIRONMENTS

被引:29
作者
BRADLEY, PM
CHAPELLE, FH
机构
[1] U.S. Geological Survey-Water Resources Division, Stephenson Center-Suite 129, Columbia, South Carolina 29210-7651
关键词
D O I
10.1021/es00011a012
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Sediments from a relatively cold (5 degrees C), petroleum hydrocarbon-contaminated aquifer in Adak, AK, mineralized [C-14]toluene at an aerobic rate (16.3% day(-1) at 5 degrees C) comparable to that (5.1% day(-1) at 20 degrees C) of sediments from a more temperate aquifer at Hanahan, SC. In addition, rates of overall microbial metabolism in sediments from the two aquifers, as estimated by [1-C-14]acetate mineralization, were similar (similar to 10.6% h(-1)) at their respective in situ temperatures. These results are not consistent with the common assumption that biodegradation rates in cold groundwater systems are depressed relative to more temperate systems. Furthermore,these results suggest that intrinsic bioremediation of petroleum hydrocarbon contaminants in cold groundwater systems may be technically feasible, in some cases.
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页码:2778 / 2781
页数:4
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