A5015787572- Mining Techniques and Economics
- IoT and GPS-based Vehicle Safety Systems
- Occupational Health and Safety Research
- Pharmaceutical and Antibiotic Environmental Impacts
- Analytical chemistry methods development
- Radioactivity and Radon Measurements
- Reservoir Engineering and Simulation Methods
- Mineral Processing and Grinding
- Belt Conveyor Systems Engineering
- Geochemistry and Geologic Mapping
- Extraction and Separation Processes
- Nuclear Physics and Applications
- Transportation Safety and Impact Analysis
- Geochemistry and Elemental Analysis
- Water Quality Monitoring and Analysis
- Radioactive contamination and transfer
- Capital Investment and Risk Analysis
- Risk and Safety Analysis
- Advanced Battery Technologies Research
- Effects and risks of endocrine disrupting chemicals
- Safety and Risk Management
- Global trade and economics
- Chemical Analysis and Environmental Impact
- Advanced Chemical Sensor Technologies
- IoT-based Smart Home Systems
Consejo Superior de Investigaciones Científicas
2023
University of Johannesburg
2021
University of Wisconsin–Madison
2020
University of the Witwatersrand
2020
Pennsylvania State University
2009-2017
Laureate Learning Systems (United States)
2017
Laureate Education
2017
Phillips Exeter Academy
2017
Universitat Rovira i Virgili
2007-2016
Virginia Tech
2003-2011
The present study evaluates the presence of nine hormones and their conjugates 20 pharmaceuticals such as anti-inflammatories, lipid regulators, antibiotics among others in sewage sludge from two treatment plants (STPs) Tarragona area (Spain) for period March 2007 until 2008. Target analytes have been determined using different methods involving pressurized liquid extraction chromatography (electrospray ionization) tandem mass spectrometry (MS-MS). Most were found at low micrograms per...
Abstract A method for the quantitative determination of ten pharmaceuticals in sewage sludge was developed by using pressurized liquid extraction (PLE) and HPLC–MS with ESI (HPLC‐(ESI)MS). The PLE optimized regard to solvents operational parameters, such as temperature, pressure, time, purge time. optimum conditions were: 50 mM phosphoric acid/methanol (1:1 v/v) solvent, temperature 100°C, pressure 100 bar, time 15 min, 2 cycles, flush volume 150% 300 s. All recoveries were over 68% except...
This paper focuses on reviewing the currently available solutions for natural gas production from methane hydrate deposits using CO 2 sequestration. Methane hydrates are ice-like materials, which form at low temperature and high pressure located in permafrost areas oceanic environments. They represent a huge hydrocarbon resource, could supply entire world centuries. Fossil-fuel-based energy is still major source of carbon dioxide emissions contribute greatly to issue global warming climate...
This paper presents a comparative study of gas explosion occurrences and causes in coal mines China the US. 170 mine accidents related to explosions are statistically compared 46 US by analysing time, location ignition source each accident. Comparative results indicate that both US, peak period for occurred before after respective country's holidays. Within mine, most frequent locations where occur are: face, heading face haulage roadway. In China, gob area is another accident location....
Fracture injection/shut-in tests are commonly used to measure the state of stress in subsurface. Injection creates a hydraulic fracture (or some cases, opens preexisting fracture), and then pressure after shut-in is monitored identify closure. Different interpretation procedures have been proposed for estimating closure, sometimes yield significantly different results. In this study, direct, in-situ strain measurements observe reopening The were performed as part EGS Collab project,...
In a byproduct mining operation, the optimal economic cutoff grade of primary product is significantly impacted by parameters byproduct. Economic indicators such as market price, and processing costs, metallurgical recovery, tonnage distribution must be considered in order to maximise total net present value (NPV) operation. this paper, an NPV maximisation algorithm for rare earth's project introduced, considering extraction The based on Lane's using equivalent factor determine each two...
Safety performance indicators are the basis for effective accident statistics, playing a crucial role in analysis and prevention. To better understand China's safety system, comparative of coal mine used China USA is introduced. The number fatalities, accidents fatality rate per million tons usually as by Chinese government mining industry, whereas USA, reportable injuries, associated incidence rates, lost work days severity measure widely measuring injuries citations, S&S designated...
Leaching tests conducted on fresh ashfall samples taken soon after the onset of 2021 Tajogaite eruption occurred at Northwest flank Cumbre Vieja Volcanic Ridge in La Palma (Canary Islands) have revealed relevant geochemical trends which important environmental significance and practical implications. The deposited most island during eruptive episode (9/19/2021–12/13/2021) contains, addition to common constituents volcanic tephra (e.g. glass, silicates like olivine, amphibole or pyroxene,...