G
Gary D. Hopkins
Researcher at Stanford University
Publications - 39
Citations - 2370
Gary D. Hopkins is an academic researcher from Stanford University. The author has contributed to research in topics: BTEX & Aquifer. The author has an hindex of 23, co-authored 39 publications receiving 2296 citations. Previous affiliations of Gary D. Hopkins include Naval Facilities Engineering Service Center & Air Force Institute of Technology.
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Journal ArticleDOI
Full-Scale Evaluation of In Situ Cometabolic Degradation of Trichloroethylene in Groundwater through Toluene Injection
Perry L. McCarty,Mark N. Goltz,Gary D. Hopkins,Mark E. Dolan,Jason P. Allan,Brett T. Kawakami,Timothy J. Carrothers +6 more
TL;DR: In this article, a 410-day period by cometabolic biodegradation through injection of 7−13.4 mg/L toluene, oxygen, and hydrogen peroxide in groundwater circulated between two contaminated aquifers through two treatment wells located 10 m apart.
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A Field Evaluation of In-Situ Biodegradation of Chlorinated Ethenes: Part 2, Results of Biostimulation and Biotransformation Experiments
TL;DR: Results are presented from a field study that document the in-situ biotransformation of trichloroethylene (TCE), cis-dichLoro methylene (cis-DCE), trans- DCE, and vinyl chloride (VC) in a saturated, semiconfined aquifer, indicating that the rate of biotranformation is more rapid when the molecules are less halogenated.
Journal ArticleDOI
Field Evaluation of in Situ Aerobic Cometabolism of Trichloroethylene and Three Dichloroethylene Isomers Using Phenol and Toluene as the Primary Substrates
Gary D. Hopkins,Perry L. McCarty +1 more
TL;DR: The Moffett field site was used for further evaluation of in situ biotransformation of chlorinated aliphatic hydrocarbons with phenol and toluene as primary substrates, and significant product toxicity was evident as concomitant TCE transformation was here reduced to ∼50%.
Journal ArticleDOI
Enhanced In Situ Bioremediation of BTEX-Contaminated Groundwater by Combined Injection of Nitrate and Sulfate
TL;DR: The results are consistent with the hypothesis that benzene can be biodegraded anaerobically after other preferentially degraded hydrocarbons have been removed.
Journal ArticleDOI
Microcosm and in situ field studies of enhanced biotransformation of trichloroethylene by phenol-utilizing microorganisms.
TL;DR: The studies demonstrate the potential for in situ TCE bioremediation using microorganisms grown on phenol and in situ removal with phenol-grown microorganisms agrees qualitatively with the microcosm studies, with the rates and extents of removal ranked as follows.