A5053897500- Water Quality and Pollution Assessment
- Heavy Metal Exposure and Toxicity
- Heavy metals in environment
- Groundwater and Isotope Geochemistry
- Analytical chemistry methods development
- Isotope Analysis in Ecology
- Atmospheric chemistry and aerosols
- Urban Stormwater Management Solutions
- Nanoparticles: synthesis and applications
- Smart Materials for Construction
- Soil and Water Nutrient Dynamics
- Water Quality Monitoring and Analysis
- Heavy Metals in Plants
- Air Quality and Health Impacts
- Recycling and Waste Management Techniques
- Urban Agriculture and Sustainability
- Arsenic contamination and mitigation
- Hydrology and Watershed Management Studies
- Urban Green Space and Health
- Geochemistry and Geologic Mapping
- Geography and Environmental Studies
- Marine and coastal ecosystems
- Analytical Chemistry and Sensors
- Atmospheric and Environmental Gas Dynamics
- Chemical Safety and Risk Management
Instituto de Pesquisas Energéticas e Nucleares
2016-2025
National Nuclear Energy Commission
2016-2025
International Atomic Energy Agency
2021-2022
Abstract Remediation of nitrate pollution Earth’s rivers and aquifers is hampered by cumulative biogeochemical processes nitrogen sources. Isotopes ( δ 15 N, 18 O) help unravel spatiotemporal nitrogen(N)-cycling aquatic (NO 3 − ). We synthesized isotope data n = ~5200) for global shallow common patterns processes. Rivers had lower median NO (0.3 ± 0.2 mg L −1 , 2902) compared to (5.5 5.1 2291) slightly N values (+7.1 3.8‰, 2902 vs +7.7 4.5‰, 2291), but were indistinguishable in O (+2.3 6.2‰,...
Global warming is considered a major threat to Earth's lakes water budgets and quality. However, flow regulation, over-exploitation, lack of hydrological data, disparate evaluation methods hamper comparative global estimates lake vulnerability evaporation. We have analyzed the stable isotope composition 1257 we find that most depend on precipitation groundwater recharge subsequently altered by catchment evaporation processes. Isotope mass-balance modeling shows ca. 20% inflow in lost through...
Selenium deficiency has been a worldwide concern because it can pose risk to human health. nanoparticles (SeNPs) are in general less toxic and more bioavailable than ionic Se and, therefore, their use for biofortification of food crops attracted attention. Rice is staple consumed by half the world's population. Indeed, studies on SeNPs' impacts oxidative stress antioxidant responses rice seedlings scarce. Herein, effect different concentrations SeNPs growth, enzyme activity, reactive oxygen...
The antimicrobial properties of silver nanoparticles (AgNPs) in animal feed have drawn increasing attention as a potential alternative to antibiotics. However, concerns about bioaccumulation and possible effects on mineral homeostasis require thorough evaluation. This study investigates the Ag various tissues ionomic alterations pigs fed AgNPs complexed with carbohydrates (AgNPs@Carb). Silver concentrations were measured tissues, such liver, kidney, spleen, heart, cecal contents, at...
The relationship between δ18O and δ15N in aquatic nitrate (NO3–) is used to assess nitrogen (N) cycling, primarily relying on controlled laboratory tests of isotope fractionation from nitrification denitrification. Nevertheless, findings frequently contradict the evolution δ18O/δ15N ratios observed natural river systems. We investigated this disparity by using moderated regression modeling, analyzing a global data set (n = 1303) isotopes encompassing rivers with varying NH4+/NO3– δ18O–H2O...
Stable isotope ratios of nitrogen and oxygen (15N/14N 18O/16O) nitrate (NO3-) are excellent tracers for developing systematic understanding sources, conversions, deposition reactive atmospheric (Nr) in the environment. Despite recent analytical advances, standardized sampling NO3-) isotopes precipitation is still lacking. To advance studies on Nr species, we propose best-practice guidelines accurate precise analysis NO3- based experience obtained from an international research project...
Reactive nitrogen (N r : nitrate and ammonium) washout in Vienna (Austria) precipitation events were investigated 2019. A total of 958 samples from 61 rain representing >90% annual collected at 5–30 min intervals for (NO 3 − ) ammonium (NH 4 + analyses meteorological information. The data revealed systematic seasonal concentration variations all N -species a clear influence rush-hour traffic on the kinetics N-scavenging processes. monthly deposition was 0.69 ± 0.21 kg ha −1 month 1.02 0.30 ,...
The isotopic composition (δ15 N, δ18 O) of nitrate in fruits and vegetables differentiates organic from conventional food production practices. Organic systems do not use synthetic fertilizers high 18 O low 15 N thereby help reveal producers' fertilization claims. Isotope analyses extracted are done by bacterial reduction which is costly specialized laboratories. Rapid, low-cost methods needed to promulgate isotope products support product certification verify the authenticity claims.Fresh...
Nitrate stable isotopes provide information about nitrate contamination and cycling by microbial processes. The Fischa-Dagnitz (Austria) spring river system in the agricultural catchment of Vienna basin shows minor annual variance concentrations. We measured (δ15N, δ18O) source up to confluence with Danube River (2019-2020) chemical water assess mixing transformation showed almost concentration (3.3 ± 1.0 mg/l as NO3--N) year-round but surprisingly variable δ15N, δ18O-NO3- values ranging...
Most of South America lacks studies on rainwater composition. The present study evaluates composition and bulk deposition inside Barcarena power station, located at the mouth Tocantins River with Amazon in Brazil. In 2012, 24-h samples were collected ELETRONORTE plant (n = 93), pH, EC, cations anions analyzed. order abundance, ions Na+ > Cl- SO4-2 Ca+2 K+ F- Mg+2 NH4+-N NO3--N. pH values ranged from 4.5 to 6.9, 17 events <5.6 5 < 5.0. Sodium dominant sea salt as main contribution. Acidity,...
From validation studies, it was possible to estimate a measurement uncertainty of several elements such as Al, Ba, Ca, Cu, Cr, Cd, Fe, Mg, Mn, Ni and K in water samples from Guarapiranga Dam. These were analyzed by optical emission spectrometry with inductively coupled plasma (ICP-OES). The value relative estimated uncertainties between 3% 15%. greatest contributions analytical curve, the recovery method, which related concentrations equipment response. Water compared CONAMA Resolution #357/2005.
This work aims to assess the internal and external quality control of anion analysis, accomplished at IPEN, using chromatography technique ions Statistical Methods for data analysis. So it was possible conclude that system is over control, generating reliable results