A5037177132- Toxic Organic Pollutants Impact
- Microbial bioremediation and biosurfactants
- Groundwater flow and contamination studies
- Environmental Justice and Health Disparities
- Environmental Conservation and Management
- Environmental remediation with nanomaterials
- Air Quality and Health Impacts
- Blockchain Technology Applications and Security
- Carcinogens and Genotoxicity Assessment
- Microbial metabolism and enzyme function
- Atmospheric and Environmental Gas Dynamics
- Soil Geostatistics and Mapping
- Mycobacterium research and diagnosis
- Water resources management and optimization
- Effects and risks of endocrine disrupting chemicals
- FinTech, Crowdfunding, Digital Finance
- Public-Private Partnership Projects
- Geochemistry and Geologic Mapping
- Innovation and Knowledge Management
- Peatlands and Wetlands Ecology
- Urban Heat Island Mitigation
- bioluminescence and chemiluminescence research
- Chemical Reactions and Isotopes
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Treatment and Disinfection
Ross School
2008-2025
University of Michigan
2013-2025
ORCID
2021
Ann Arbor Center for Independent Living
2021
American Society For Engineering Education
2020
CDM Smith (United States)
2020
Bellevue Hospital Center
2020
Michigan United
2010-2013
Research Institute for Nature and Forest
2011
Argonne National Laboratory
2010
A side-by-side comparison of bioaugmentation, biostimulation, and a recirculation-only control was implemented in chloroethene-contaminated aquifer. The objective to develop contaminant mass balance based on the analysis groundwater aquifer solids quantify key dechlorinating populations during treatment determine their relation rate chloroethenes removed. bioaugmentation strategy, using Dehalococcoides-containing PCE-to-ethene inoculum enriched from same aquifer, resulted near-stoichiometric...
Green (vegetated) roofs have gained global acceptance as a technologythat has the potential to help mitigate multifaceted, complex environmental problems of urban centers. While policies that encourage green exist atthe local and regional level, installation costs remain at premium deter investment in this technology. The objective paper is quantitatively integrate range stormwater, energy, air pollution benefits into an economic model captures building-specific scale. Currently, are...
Green roof technology is recognized for mitigating stormwater runoff and energy consumption. Methods to overcome the cost gap between green roofs conventional were recently quantified by incorporating air quality benefits. This study investigates impact of scaling on these benefits at city-wide scale using Washington, DC as a test bed because proposed targets in 20−20−20 vision (20 million ft2 2020) articulated Casey Trees, nonprofit organization. Building-specific analyzed assuming two...
Contributions of biotic (cell-mediated) and abiotic (mineral-mediated) reactions to carbon tetrachloride (CT) transformation were studied in a model iron-reducing system that used hydrous ferric oxide (HFO) as the electron acceptor, acetate substrate, Geobacter metallireducens representative dissimilative bacteria (DIRB). Over period 2-3 weeks, nanoscale magnetite particles, Fe3O4, consistently formed product iron respiration this system. CT rates measured independently resting cell...
Iron-reducing conditions in subsurface environments promote dechlorination reactions via both biotic and abiotic pathways, the latter often mediated biologically activated minerals formed by dissimilatory iron-reducing bacteria (DIRB). Here we report major products pathways associated with transformation of carbon tetrachloride (CT) nanoscale biogenic magnetite/maghemite particles produced DIRB Geobacter metallireducens. Product formation free radical/carbene trapping studies indicate that...
Measurements of oxidation−reduction potential (Eh) and concentrations dissolved hydrogen (H2) were made in a shallow groundwater system contaminated with solvents jet fuel to delineate the zonation redox processes. Eh measurements ranged from +69 −158 mV cross section plume accurately delineated oxic anoxic groundwater. Plotting measured pH values on an equilibrium stability diagram indicated that Fe(III) reduction was predominant process zone did not indicate presence methanogenesis sulfate...
Data with some values below a limit of detection (LOD) can be analyzed using methods survival analysis for left-censored data. The reverse Kaplan-Meier (KM) estimator provides an effective method estimating the distribution function and thus population percentiles such Although developed in 1970s strongly advocated since then, it remains rarely used, partly due to limited software availability.In this paper, KM is described illustrated serum dioxin data from University Michigan Dioxin...
The ability of a microbial consortium eluted from dioxin-contaminated Passaic River sediments to dechlorinate polychlorinated dibenzo-p-dioxins (PCDDs) was investigated under methanogenic conditions. Aged 2,3,7,8-tetraCDD, which had partitioned into the sediments, stoichiometrically converted tri- and monoCDD congeners. During dechlorination, dominant activity within shifted nonmethanogenic activity. Freshly spiked octaCDD hepta-, hexa-, penta-, tetra-, tri-, di-, monochlorinated isomers,...
Acinetobacter sp. strain 4CB1 was isolated from a polychlorobiphenyl-contaminated soil sample by using 4-chlorobenzoate as sole source of carbon and energy. Resting cells hydrolytically dehalogenated under aerobic anaerobic conditions, but 4-hydroxybenzoate accumulated only conditions. Cell extracts oxidized an NADH-dependent monooxygenase to form protocatechuate, which subsequently both ortho- meta-protocatechuate dioxygenase reactions. When grown on biphenyl, P6 cometabolized...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBioavailability and Transformation of Highly Chlorinated Dibenzo-p-Dioxins Dibenzofurans in Anaerobic Soils SedimentsPeter. Adriaens, Quingzai. Fu, Dunja. Grbic-GalicCite this: Environ. Sci. Technol. 1995, 29, 9, 2252–2260Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/es00009a015https://doi.org/10.1021/es00009a015research-articleACS...
Population declines and extirpations of large mammalian carnivores are major concerns for global biodiversity conservation. Many vulnerable to conflict with humans attract conservation attention their flagship appeal ecological importance. Coexisting requires an understanding carnivore distribution abundance relative human activities disturbances. Such knowledge is often hindered by the rare elusive nature lack systematic surveys in biodiverse regions facing high levels threat. The Caucasus...
Abstract A frequent barrier to addressing some of our world’s most pressing environmental challenges is a lack funding. Currently, project funding largely comes from philanthropic and public sources, but this does not meet current needs. Increased coordination collaboration between multiple levels sectors government, in addition private sector funding, can help address the challenge. New financial tools strategies enable transition facilitate uptake innovative solutions. One such mechanism,...
The growing interest in the financial materiality of Environmental, Social, and Governance (ESG) ratings has prompted recent investigations into their risk pricing impact corporate bond market. specific implications for Architecture, Engineering, Construction (AEC) industry have not been explored, as prior work primarily focused on broad-based ESG integration. To fill this gap, our study employed an interpretable machine learning technique using a sample universe U.S. bonds spanning from...
This study examines the copper value chain through firm-level, temporal, and multi-tier network analysis to explore risk propagation structural changes across industries. It incorporates relationship duration as edge weights in a cascading failure model, enabling identification of critical firms based on their connectivity vulnerability disruptions. granular approach captures roles both public private firms, emphasizing interconnectedness chain. The findings reveal that network's sparse...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContinuous coculture degradation of selected polychlorinated biphenyl congeners by Acinetobacter spp. in an aerobic reactor systemPeter Adriaens and Dennis D. FochtCite this: Environ. Sci. Technol. 1990, 24, 7, 1042–1049Publication Date (Print):July 1, 1990Publication History Published online1 May 2002Published inissue 1 July 1990https://doi.org/10.1021/es00077a015Request reuse permissionsArticle Views179Altmetric-Citations53LEARN ABOUT THESE...
Transformation of chlorinated aliphatic compounds was examined in Shewanella putrefaciens strain MR-1, an obligately respiring facultative anaerobe. Under anaerobic conditions, MR-1 has been shown to transform tetrachloromethane trichloromethane (24%), CO2 (7%), cell-bound material (50%) and unidentified nonvolatile products (4%). The highest rate extent transformation were observed with cells grown under iron(III)-respiring conditions. Lactate, formate hydrogen the most effective electron...
Polychlorinated dibenzo-p-dioxins (PCDD) are ubiquitous and considered to be unreactive biotic abiotic transformation processes. Here we demonstrate that sediment-associated 2,3,7,8-substituted dioxin residues in general, 2,3,7,8-TCDD particular, a state of flux, as they produced from peri-dechlorination octaCDD, further laterally dechlorinated 2-MCDD. This reaction can stimulated the presence organic acids, 2-monobromodibenzo-p-dioxin (2-MBDD) hydrogen, which result production HpCDD,...
Abstract Ab initio restricted Hartree Fock and density functional theory (DFT), as well semiempirical Austin model 1 parametrization method 3 molecular orbital calculations were carried out for a range of chlorinated dioxin molecules to obtain descriptors such HOMO–LUMO gaps (HOMO = highest occupied orbital, LUMO lowest unoccupied orbital) partial atomic charges. The gap is an indicator stability in molecule: the larger greater molecule toward further reaction. These indicate that with...
Contaminated sediment management is an urgent environmental and regulatory issue worldwide. Because remediation expensive, sound quantitative assessments of uncertainty about the spatial distribution contaminants are critical, but they hampered by physical complexity environments. This paper describes use geostatistical modeling approaches to quantify 2,3,7,8-tetrachlorodibenzo-p-dioxin concentrations in Passaic River (New Jersey) sediments incorporate this information decision-making...