A5061067170- Oil Spill Detection and Mitigation
- Toxic Organic Pollutants Impact
- Environmental Toxicology and Ecotoxicology
- Microbial bioremediation and biosurfactants
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Environmental Justice and Health Disparities
- Genomics and Phylogenetic Studies
- Marine and environmental studies
- Atmospheric chemistry and aerosols
- Radioactive contamination and transfer
- Coastal wetland ecosystem dynamics
- Crustacean biology and ecology
- Radioactivity and Radon Measurements
- Microbial Community Ecology and Physiology
- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Water Quality Monitoring and Analysis
- Microplastics and Plastic Pollution
- Marine and Offshore Engineering Studies
- Microbial Metabolic Engineering and Bioproduction
- Analytical Chemistry and Sensors
- Energetic Materials and Combustion
- Atmospheric and Environmental Gas Dynamics
Texas A&M University
2016-2023
Thermo Fisher Scientific (United States)
2023
University of Southern Mississippi
2012-2017
Stennis Space Center
2012
In May 2021, the M/V X-Press Pearl container ship burned for 2 weeks, leading to largest maritime spill of resin pellets (nurdles). The disaster was exacerbated by leakage other cargo and ship's underway fuel. This affords unique opportunity study a time-stamped, geolocated release plastic under real-world conditions. Field samples collected from beaches in Sri Lanka nearest comprised nurdles exposed heat combustion, burnt pieces (pyroplastic), oil-plastic agglomerates (petroplastic). An...
Marine oil snow (MOS) formation is a mechanism to transport from the ocean surface sediments. We describe here use of 110L mesocosms designed mimic oceanic parameters during an spill including chemical dispersants in order understand processes controlling MOS formation. These experiments were not be toxicity tests but rather illustrate mechanisms. This paper focuses on development protocols needed conduct under environmentally relevant conditions examine marine and MOS. The required...
Abstract The Chemical Response to Oil Spill: Ecological Effects Research Forum's water accommodated fraction procedure was compared with 2 alternative techniques in which crude oil passively dosed from silicone tubing or O‐rings. Fresh Macondo (MC252) at 30 mg/L using each approach investigate dissolution kinetics, monitored by fluorometry as estimated equivalents (EOEs). Subsequent experiments dosing method were then conducted multiple loadings. Following equilibration, test media...
The genome of Rhodococcus opacus strain M213, isolated from a fuel-oil contaminated soil, was sequenced and annotated which revealed size 9,194,165 bp encoding 8680 putative genes G+C content 66.72%. Among the protein coding genes, 71.77% were as clusters orthologous groups proteins (COGs); 55% COGs present paralog clusters. Pulsed field gel electrophoresis (PFGE) analysis M213 presence three different sized replicons- circular chromosome two megaplasmids (pNUO1 pNUO2) estimated to be 750Kb...
There are few studies that have evaluated hydrocarbon toxicity to vertically migrating deep-sea micronekton. Crustaceans were collected alive using a 9-m2 Tucker trawl with thermally insulated cod end and returned the laboratory in 10 °C seawater. Toxicity of polycyclic aromatic 1-methylnaphthalene Americamysis bahia, Janicella spinacauda, Systellaspis debilis, Sergestes sp., Sergia euphausiid species was assessed constant exposure test utilizing novel passive dosing testing protocol. The...
Hurricane Harvey made landfall in Texas August 25, 2017, bringing massive rains and flooding that impacted soils a residential neighborhood East Houston. Trace elements, organochlorine pesticides, polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ether fire retardants (PBDEs) polychlorinated biphenyls (PCBs) were determined 24 soil samples. The highest concentrations found total PAHs, which ranged from 1,310 μg/kg to 85,700 with mean of 12,600 μg/kg. Analysis specific PAH...
Here, we report results from a 15-day mesocosm experiment examining changes in estimated oil equivalents (EOEs), n-alkanes (n-C10 to n-C35), polycyclic aromatic hydrocarbons (PAHs) and petroleum biomarkers. Water accommodated fractions (WAF) of diluted chemically enhanced WAF (DCEWAF) were prepared concentrations residues determined on day 0, 3 15, respectively. Significant removals n-alkane PAHs observed starting 3. The n-C17/pristane n-C18/phytane ratios suggested that the removal was due...
ABSTRACT (#2017-141) The Tropical Oil Pollution Investigations in Coastal Systems (TROPICS) experiment initiated 1984 on the Caribbean coast of Panama has become one most comprehensive field experiments examining effects oil exposure to a combination tropical marine reef, seagrass, and mangrove communities. experimental dosage was chosen simulate severe but realistic spill scenario so that results could be useful decisions about extent which dispersants reduced or exacerbated an environments...
Chemical characterization of the presence oil in environmental samples are performed using methods varying complexity. Extraction with an organic solvent and analysis by fluorescence spectrometry has been shown to be a rapid effective screening technique for petroleum environment. During experiments, provides opportunity researchers modify experimental conditions real time. Estimated Oil Equivalents (EOE) relies on measurement aromatic compounds estimate concentration.The present...
Marine microbial communities play an important role in biodegradation of subsurface plumes oil that form after is accidentally released from a seafloor wellhead. The response these mesopelagic to the application chemical dispersants following spills remains debated topic. While there evidence contrasting results some previous work may be due differences dosage between studies, impacts on community composition unconstrained. To answer this open question, we exposed Gulf Mexico alone, three...
Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI
This study deals with an incidence of small fire breaks in industrial gas plant, manufacturing acetylene gas. It also explains the probable causes, preventive and corrective measures. What — if analysis Cause consequence were used to identify possible errors unsafe activities. Emergency procedures are discussed. Finally some useful recommendations listed which has been drawn for facilities storing calcium carbide is raw material production preparing acetylene.
The potential impacts of sub-surface hydrocarbon plumes to deep-water column micronekton are an important consideration in a more complete understanding ecosystem effects resulting from deep-sea oil spills. However, evaluating toxicity these organisms presents multiple challenges, and the use shallow-water proxy species allows comparison validation experimental results. This study thus examined suitability peppermint shrimp, Lysmata boggessi, as for ecologically zooplankton/micronekton...