Glenn Miller - Academia.edu (original) (raw)

Papers by Glenn Miller

Mercury (Hg) methylation in sediment is favored under anoxic conditions, and is linked to sulfate... more Mercury (Hg) methylation in sediment is favored under anoxic conditions, and is linked to sulfate-reducing bacteria (SRB). The role of SRB in Hg methylation has been extensively investigated in recent years. Additionally, oxyanion-forming elements of Group VI, including MoO{sub 4}{sup =}, WO{sub 4}{sup =}, SeO{sub 4}{sup =}, have been shown to affect bacterial sulfate reduction, either by competitive inhibition of SRB or a noncompetitive inhibitory mechanism. We have investigated the effect of ambient concentrations of these oxyanions on mercury methylation in the Carson River system in western Nevada.

Treatment of acid mine drainage with sulfate-reducing bioreactors has been shown to be an effecti... more Treatment of acid mine drainage with sulfate-reducing bioreactors has been shown to be an effective low cost alternative to other forms of treannent. These systems are designed to promote growth of sulfate-reducing bacteria within a contained system. The bacteria oxidize organic material in the bioreactor, and transfer electrons to sulfate, reducing it to sulfide. The overall process produces a gain in alkalinity and a rise in pH in the effluent. In addition, divalent metals are removed from solution by sulfide precipitation. However, the effectiveness of bioreactors that rely on fIXed substrates (i.e. manure, straw or wood chips) declines as the readily available carbon source contained within the substrate is depleted. Our studies have focused on alternative carbon sources that can be added to a bioreactor incrementally to sustain sulfate- reduction over extended periods of time. Several column studies were condu.cted to test the effectiveness of methanol and ethanol as alternativ...

Release of gasoline and other contaminants, including polycyclic aromatic hydrocarbons, from mari... more Release of gasoline and other contaminants, including polycyclic aromatic hydrocarbons, from marine engines into fresh water lakes has become a concern both due to potential impacts on drinking water sources, but also due to potential ecological impacts. Lake Tahoe, an ultraoligotrophic lake shared by Nevada and California, receives extensive recreational watercraft use, and analysis of water samples in 1997 and 1998 revealed widespread occurrence of MTBE, benzene, toluene, xylenes and ethyl benzene. Because carbureted two-cycle engines are known to release approximately 25% of gasoline unburned, these marine engines were suspected as a primary source of these volatile constituents. Further tests on a variety of engines confirmed that the carbureted two-cycle engines released greater amounts of gasoline components into water than either the newer direct injected two-stroke engines (Ficht technology) or four stroke engines. Using toluene as a surrogate for gasoline, and comparing oth...

Acid drainage remains the largest source of environmental pollution from mining in the western Un... more Acid drainage remains the largest source of environmental pollution from mining in the western United States. An un-related waste material, the fluid left after production of biodiesel fuel, is becoming a disposal issue as more biodiesel is manufactured. Semi-passive bioreactors treating acid mine drainage waters may be able to use the waste from biodiesel production as a feed for the sulfate-reducing bacteria cultivated in reactors, thus involving one waste material in the remediation of another. The success of laboratory columns using biodiesel waste led to a limited field experiment at a reactor treating acid-mine drainage in the state of California, U.S.

Reviews of environmental contamination and toxicology, 2004

Many field monitoring studies have indicated the substantial role of the troposphere as both a si... more Many field monitoring studies have indicated the substantial role of the troposphere as both a sink and transport medium for pesticides. At the same time, this is the least studied and understood environmental compartment in regards to pesticide fate. Although the fundamental principles behind volatilization and tropospheric reactivity are well understood, it is becoming increasingly apparent that the ability to quantitatively measure flux and reaction rates in the air will continue to pose problems for researchers. To date, most deterministic models that try to simulate real world conditions generally fail to provide tropospherically relevant flux and reaction rates because it is virtually impossible to scale down all possible interactions occurring in a near-infinite reservoir. Better field methods for determining flux are emerging and more ambient air monitoring studies are being conducted. This growing database of information, together with an understanding of physicochemical pr...

Currently there is no commercial fishing for lake sturgeon, (Acipenser fulvescens), in U. S. wate... more Currently there is no commercial fishing for lake sturgeon, (Acipenser fulvescens), in U. S. waters of the Great Lakes and sport fishing is limited. Canada allows commercial harvest from Ontario waters of Lake Huron only. Lake sturgeon is considered threatened or endangered by 19 of the 20 states within its original range in the U.S. Lake sturgeon abundance was reduced

Pesticide Biochemistry and Physiology, 1991

ABSTRACT

Tetrahedron, 1979

... USA STEVEN SONTUM Department of Biochemistry and Biophysics, UC Davis, Davis, CA 95616, USA a... more ... USA STEVEN SONTUM Department of Biochemistry and Biophysics, UC Davis, Davis, CA 95616, USA and RICHARD G. ZEPP Environmental Research ... by the sharp drop in disappearance quantum efficiency in the organic solvents (Table 1). Moreover, the major product in ...

Journal of Agricultural and Food Chemistry, 2014

The soil fumigant metam-sodium (CH3NHCS2Na) produces the bioactive respiratory irritant methyl is... more The soil fumigant metam-sodium (CH3NHCS2Na) produces the bioactive respiratory irritant methyl isothiocyanate (MITC). Recent laboratory gas-phase oxidative studies indicate that MITC rapidly transforms to the more toxic methyl isocyanate (MIC) in the lower atmosphere. Inhalation exposure risks from MITC plus MIC may therefore be an occupational worker and/or bystander health concern. To address this concern, MIC was monitored, along with MITC, in outdoor residential air in Washington state during the peak fall metam fumigation season. XAD-7 cartridges, coated with 1-(2-pyridyl)piperazine, were developed to retain MIC as its stable substituted urea derivative. Of the 68 residential air measurements of MIC, 15 (22%) were observed to be above the California Environmental Protection Agency&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s chronic inhalation reference level of 1 μg/m(3), with an observed maximum MIC air concentration of 4.4 μg/m(3). This study indicates MIC air concentrations can be anticipated along with MITC in residential air where seasonal metam soil fumigant applications occur.

Water Research, 1995

... INACTIVATION OF COLIFORM BACTERIA AND VIRUSES IN SECONDARY WASTEWATER EFFLUENT RICHARD J. WAT... more ... INACTIVATION OF COLIFORM BACTERIA AND VIRUSES IN SECONDARY WASTEWATER EFFLUENT RICHARD J. WATTS,l* SUNGHO KONG,l MARGARET P ... Savino and Angeli (1985) used organic sensitizers fixed on granu lar activated carbon, silica gel, and XAD2 resin to ...

Water Research, 1999

Sulfate reducing passive bioreactors are increasingly being used to remove metals and raise the p... more Sulfate reducing passive bioreactors are increasingly being used to remove metals and raise the pH of acidic waste streams from abandoned mines. These systems commonly use a variety of organic substrates (ie manure, wood chips) for sulfate reduction. The effectiveness of ...

Review of Scientific Instruments, 1992

... of Nevada, Reno, Nevada 89557 Louis Hlousek Linear Instruments, 2325 Robb Drive, Rena, Nevada... more ... of Nevada, Reno, Nevada 89557 Louis Hlousek Linear Instruments, 2325 Robb Drive, Rena, Nevada 89523 Murray Hackett, Houla Wang, and Glenn C. Miller ... large-diameter flow cells with a relatively long pathlength are the most attractive.&#x27;5*&#x27;6 As shown by Poppe, if properly ...

Mine Water and the Environment, 2008

A laboratory scale sulfate-reducing bioreactor column study was used to investigate removal of ar... more A laboratory scale sulfate-reducing bioreactor column study was used to investigate removal of arsenic, selenium, and sulfate in neutral to alkaline simulated mine water. Selenium was effectively removed as insoluble elemental selenium from 200 lg/L to below the maximum contaminant level (50 lg/L). With the addition of ferrous chloride in the influent, arsenic was also effectively removed to near the maximum contaminant level (10 lg/ L). Sulfate removal was apparently limited by the presence of undissociated hydrogen sulfide, which was found to limit sulfate-reducing bacterial activity in the range of 20-40 mg/L and will need to be considered for sulfatereducing bacteria treatment system designs.

Journal of Environment Quality, 1992

Page 1. Degradation of Perchloroethylene by Fenton's Reagent: Speciation and Pathway Sol... more Page 1. Degradation of Perchloroethylene by Fenton's Reagent: Speciation and Pathway Solomon W. Leung,* Richard J. Watts, and Glenn C. Miller ABSTRACT Silica sand contaminated with perchloroethylene (PCE) was effec-tively treated by Fenton's reagent. ...

$Research paper thumbnail of Treatment of Four Biorefractory Contaminants in Soils Using Catalyzed Hydrogen Peroxide$

Journal of Environment Quality, 1991

The Energy Citations Database (ECD) provides access to historical and current research (1948 to t... more The Energy Citations Database (ECD) provides access to historical and current research (1948 to the present) from the Department of Energy (DOE) and predecessor agencies.

Journal of Environment Quality, 1997

Journal of Chromatography A, 1995

A scanning UV-Vis detector, linked by fiber optics to a heated remote flow cell, was interfaced t... more A scanning UV-Vis detector, linked by fiber optics to a heated remote flow cell, was interfaced to a gas chromatograph and gas chromatograph-mass spectrometer equipped with conventional split/splitless injectors and a 30 m × 0.32 mm, 0.25 tzm capillary column. Gas-phase UV spectra with a 3 nm effective bandpass are shown for benzene, biphenyl, anthracene, phenanthrene, benzo-a-pyrene, methylanisoles and polychlorinated biphenyls. Chromatograms at a single wavelength are presented for Aroclors 1254 and 1221. A dual mass-UV chromatogram is shown for unleaded gasoline. Calibration curves generated for aromatic hydrocarbons suggest linearity of detector response over a range of about 104. A total absorbance chromatogram is shown for four components of a test mixture. Detection limits for a moderate UV absorber, biphenyl, were 1.0 ng in summed scanning mode and 750 pg in single-wavelength mode, using a criterion of three standard deviations of the baseline noise. The single-wavelength detection limit for naphthalene, a stronger UV absorber, was 90 pg.

Journal of Chemical Ecology, 1993

A headspace air-sampling experiment was performed in the laboratory to determine the identity and... more A headspace air-sampling experiment was performed in the laboratory to determine the identity and concentrations of monoterpene hydrocarbons that could be attained in the vapor phase surrounding single-leaf pinyon pine (Pinus monophylla Torr. & Frem.) understory ...