A5079626194- Air Quality and Health Impacts
- Microbial bioremediation and biosurfactants
- Atmospheric chemistry and aerosols
- Wastewater Treatment and Nitrogen Removal
- Air Quality Monitoring and Forecasting
- Pesticide and Herbicide Environmental Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Resource Management and Quality
- Soil Science and Environmental Management
- Anaerobic Digestion and Biogas Production
- Heavy metals in environment
- Radioactivity and Radon Measurements
- Algal biology and biofuel production
- Vehicle emissions and performance
- Advanced oxidation water treatment
- Microbial Metabolic Engineering and Bioproduction
- Higher Education and Sustainability
- Mycotoxins in Agriculture and Food
- Environmental Chemistry and Analysis
- Microbial Fuel Cells and Bioremediation
- Water Treatment and Disinfection
- Environmental and Analytical Chemistry Studies
- Integrated Water Resources Management
- Phytochemistry and Biological Activities
- Corporate Social Responsibility Reporting
Universidad Autónoma de Nuevo León
2012-2023
Tecnológico de Monterrey
1988
The prevalence of heavy metal pollution and mobility both Pb Cd was investigated in street dust samples from the Metropolitan Area Monterrey (MAM) northern Mexico. Street 30 selected sites were analysed for their content Zn, Cd, Pb, Cr Ni after digestion according to US EPA Method 3051. Multivariate analysis including correlation coefficient analysis, Principal Component Analysis Cluster used analyse data identify possible sources these metals. Compared with background values, elevated...
In this study kerneled corn sold and distributed through wholesale outlets in the city of Monterrey, Mexico was analysed. The extraction aflatoxins performed with a mixture methanol/water (80:20) its derivatization carried out trifluoroacetic acid. analysis done by high performance liquid chromatography (HPLC) using fluorescence for detection. From 41 samples analysed, B1 G1, were found to be present. Aflatoxin concentrations ranged from 5.03 ng/g 465.31 ng/g, aflatoxin G1 1.59 57.1 ng/g. It...
MTBE was effectively biodegraded under oxidizing environmental conditions in the presence of an acclimated mixed culture isolated from a petrochemical biotreater. MC-1 (Gram-positive coccus), MC-2 (Acinetobacter lwoffii) and MC-3 (Bacillus sp.) were present medium, with being predominant organism. The other easily assimilated carbon sources medium influenced biodegradation. In batch studies, 62–73% 144–192 hours at initial concentration 100 ppm as sole source, ORP ranging 191–274 mv,...
In this work, the particulate matter (PM) from three different monitoring stations in Monterrey Metropolitan Area Mexico were investigated for their compositional, morphological, and optical properties. The main aim of research was to decipher sources particles. methodology involved ex situ sequential analysis individual particles by analytical techniques: scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), polarized light microscopy (PLM), micro-Raman (MRS)....
A tracer study was conducted in a 3-ha surface flow constructed wetland to analyze transport performance of PRD1, an enteric virus model. The convection-dispersion equation (CDE), including first-order reaction model, adequately simulated PRD1 the under average hydraulic loading rate 82 mm/d. Convective velocity (v) and longitudinal dispersion coefficient (D) were estimated by modeling conservative (bromide) pulse through wetland. Both bromide simultaneously added entering secondary treated...
Abstract BACKGROUND: Biodegradation of diesel hydrocarbons using bioreactors has been proposed as an alternative for contaminated sites remediation. To make this feasible, several factors must be optimized or improved: reducing hydraulic retention times (HRT) and applying design methods to enhance the access microorganisms low soluble recalcitrant compounds like hydrocarbon fuels. In present work a time cost efficient continuous‐flow packed bed bioreactor at HRT was designed evaluated. The...
BTEX removal under aerobic conditions by unleaded gasoline acclimated biomass and biomass, the effect of surfactant on biodegradation were evaluated. The concentration as sole source carbon for acclimation yeast extract cell growth in gasoline-fed reactors also For benzene was shown most recalcitrant among all BTEX, followed o-xylene toluene with 16-23%, 35-41% 57-69% biodegradation, respectively. Ethylbenzene consistently fastest chemical removed 99% four bioreactor biomasses tested. 1,200...
Methyl tertiary-butyl ether (MTBE) is a synthetic chemical used in unleaded gasoline as an additive to reduce levels of ozone and carbon monoxide from auto exhaust. Due its recalcitrant properties, MTBE has caused groundwater contamination worldwide. A laboratory-scale biofilter made natural fiber (kenaf) mat inoculated with MTBE-degrading microorganisms, was evaluated for removal efficiency. Operational parameters oxygen flow rate, hydraulic retention time (HRT), yeast extract initial...
The biodegradation kinetics of BTE-oX and MTBE, mixed all together in the presence diesel-grown bioaugmented bacterial populations as high 885 mg/L VSS, was evaluated. effect soil aqueous samples Tergitol NP-10 on substrate rates were also Biodegradation evaluated for 54 h, every 6 h. All chemicals followed a first-order two-phase kinetic model, whereas MTBE zero-order removal model samples. much higher than those retarded rates. addition to containing had positive rate Substrate percent...
Mediante la comparación estadística de características bienestar para dos grupos hogares del municipio Zinacantepec, Estado México, en este trabajo se estima el alcance los objetivos sociales un programa responsabilidad social administrado por empresa Cementos Mexicanos (Cemex). Los resultados establecen que, una parte, usuarios construyen viviendas más grandes, con habitaciones y menos tiempo que sus vecinos no participantes, otra, algunos aún han sido alcanzados.
Here, we report the chemical composition and optical properties of fine particles (PM 2.5 ) water-soluble organic carbon (WSOC) these particles. Additionally, potential sources WSOC emission were determined through study on fluorescence excitation–emission matrix spectra parallel factor analysis (EEM-PARAFAC). Samples collected in an urban site Monterrey Metropolitan Area Mexico during summer winter characterized using attenuated total reflectance-Fourier-transform infrared spectroscopy...
The biodegradation kinetics of BTE-oX and MTBE, mixed all together, in the presence 905mg/L VSS BTEX-acclimated biomass was evaluated. Effects soil Tergitol NP-10 aqueous samples on substrate rates were also Biodegradation evaluated for 36 hours, every 6 hours. MTBE followed a first-order one-phase kinetic model samples, whereas benzene, toluene ethylbenzene two-phase samples. O-xylene only. Interestingly, o-xylene able to switch when either or added. retarded removal rates. enhanced by...
Monitoring of distribution and fractionation mercury (Hg) from within the San Juan River Basin that provides water for Metropolitan Area Monterrey, Mexico (MAM), was performed.The purpose this work to characterize risk Hg exposure human populations reside in communities nearby area.Total quantified surface sediments (0-10 cm) collected 11 locations during summer season 2006.The analysis carried out by Cold Vapor Atomic Absorption Spectroscopy (CVAAS).Simultaneously, some relevant physical...