Effect of contaminant concentration on aerobic microbial mineralization of DCE and VC in stream-bed sediments

被引:77
作者
Bradley, PM [1 ]
Chapelle, FH [1 ]
机构
[1] US Geol Survey, Columbia, SC 29210 USA
关键词
D O I
10.1021/es970498d
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Discharge of DCE and VC to an aerobic surface water system simultaneously represents a significant environmental concern and, potentially, a non-engineered opportunity for efficient contaminant bioremediation. The potential for bioremediation, however, depends on the ability of the stream-bed microbial community to efficiently and completely degrade DCE and VC over a range of contaminant concentrations. The purposes of the studies reported here were to assess the potential for aerobic DCE and VC mineralization by stream-bed microorganisms and to evaluate the effects of DCE and VC concentrations on the apparent rates of aerobic mineralization. Bed-sediment microorganisms indigenous to a creek, where DCE-contaminated groundwater continuously discharges, demonstrated rapid mineralization of DCE and VC under aerobic conditions. Over 8 days, the recovery of [1,2-(14)C]DCE radioactivity as (14)CO(2) ranged from 17% to 100%, and the recovery of [1,2-(14)C]VC radioactivity as (14)CO(2) ranged from 45% to 100%. Rates of DCE and VC mineralization increased significantly with increasing contaminant concentration, and the response of apparent mineralization rates to changes in DCE and VC concentrations was adequately described by Michaelis-Menten kinetics.
引用
收藏
页码:553 / 557
页数:5
相关论文
共 35 条
  • [1] AXELANDER M, 1994, BIODEGRADATION BIORE, P71
  • [2] BEKINS B, IN PRESS GROUND WATE
  • [3] COMETABOLIC DEGRADATION OF TCE AND DCE WITHOUT INTERMEDIATE TOXICITY
    BIELEFELDT, AR
    STENSEL, HD
    STRAND, SE
    [J]. JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1995, 121 (11): : 791 - 797
  • [4] Bouwer E. J., 1994, Handbook of bioremediation., P149
  • [5] Anaerobic mineralization of vinyl chloride in Fe(III)-reducing, aquifer sediments
    Bradley, PM
    Chapelle, FH
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (06) : 2084 - 2086
  • [6] MICROBIAL TRANSFORMATION OF NITROAROMATICS IN SURFACE SOILS AND AQUIFER MATERIALS
    BRADLEY, PM
    CHAPELLE, FH
    LANDMEYER, JE
    SCHUMACHER, JG
    [J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1994, 60 (06) : 2170 - 2175
  • [7] BIOTRANSFORMATION OF TETRACHLOROETHYLENE BY ANAEROBIC ATTACHED-FILMS AT LOW-TEMPERATURES
    CARTER, SR
    JEWELL, WJ
    [J]. WATER RESEARCH, 1993, 27 (04) : 607 - 615
  • [8] AEROBIC BIODEGRADATION OF VINYL-CHLORIDE IN GROUNDWATER SAMPLES
    DAVIS, JW
    CARPENTER, CL
    [J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1990, 56 (12) : 3878 - 3880
  • [9] ELLIS DE, 1996, S NAT ATT CHLOR ORG, P93
  • [10] Fathepure BZ, 1995, BIOREMED SER, V3, P169