A5085328938- Clay minerals and soil interactions
- Heavy metals in environment
- Soil and Unsaturated Flow
- Geochemistry and Elemental Analysis
- Iron oxide chemistry and applications
- Arsenic contamination and mitigation
- Mine drainage and remediation techniques
- Radioactive element chemistry and processing
- Soil and Water Nutrient Dynamics
- Heavy Metal Exposure and Toxicity
- Adsorption and biosorption for pollutant removal
- Mercury impact and mitigation studies
- Plant Micronutrient Interactions and Effects
- X-ray Diffraction in Crystallography
- Nanoparticles: synthesis and applications
- Soil Management and Crop Yield
- Growth and nutrition in plants
- Fluoride Effects and Removal
- Chemical Synthesis and Characterization
- Groundwater and Isotope Geochemistry
- Metal Extraction and Bioleaching
- Geophysical and Geoelectrical Methods
- Environmental remediation with nanomaterials
- Soil and Land Suitability Analysis
- Electrokinetic Soil Remediation Techniques
Universidade de São Paulo
2019-2022
Secretaria de Agricultura e Abastecimento
2004-2021
Methodist University of Piracicaba
2008
Universidade Federal de São Carlos
2004-2006
Mn oxides are the major sinks for Cd(II) in aquatic environment. At redox interface, reduced sulfur might affect fate of sorbed by either reducing or forming strong complexes with Cd(II). Here, we investigated immobilized on δ-MnO2 affected (S2- and cysteine). A low concentration S2- led to migration from vacant sites edge sites, while a high largely converted adsorbed surface CdS. pH, cysteine addition release initially at into solution caused small portion sites. detachment δ-MnO2,...
Apart from surface complexation, precipitation of minerals also plays an important role in reducing the mobility and transport heavy metals environment. In this study, Cd(II) sorption species on surfaces γ-Al2O3 at pH 7.5 were characterized using multiple techniques. Results show that addition to adsorption complexes, Cd hydroxide phases (Cd(OH)2 precipitates Cdx(OH)y polynuclear complexes) formed initial stages gradually transformed CdCO3 with time. addition, CdAl layered double (LDH) under...
The increasing use of ZnO nanoparticles (NPs) has generated serious concern about their fate, transportation, and toxicity in the environment. present study focuses on key geochemical processes controlling environmental fate NPs, that is, dissolution transformation NPs a large time scale with two common soil mineral (γ-Al2O3 goethite) suspensions batch reactors for up to 360 days using synchrotron-radiation powder X-ray diffraction, extended absorption fine structure spectroscopy,...
Although mineralogic quantitative phase analysis (QPA) of the soil clay fraction can provide useful information for improvement management practices, QPA often requires a combination several analytical techniques, which be expensive and time consuming. One alternative that involves single to give accurate soils is use Rietveld method analyze powder x‐ray diffraction (XRD) data. In this study, we evaluated accuracy XRD–Rietveld approach analyses Oxisol clays when observed structure factors [...
A quantitative evaluation of the dynamics antimony (Sb) species transformation when Sb(III) enters soil matrix would facilitate understanding speciation and environmental fate Sb in natural environments. Towards this end, coupled sorption abiotic oxidation kinetics were examined across 12 soils with a 24 h timeframe. The soil-solution distribution coefficients (Kd) ranged between 214 5965 L kg−1. Both apparent mechanistic kinetic models used to described process. model indicated two-rate...
Although the mineralogical quantitative analysis of soil clay fraction can provide useful information for improvement management practices, quantitation all components normally requires a combination different analytical techniques, which makes this determination expensive and time-consuming. One alternative more expeditious quantitations consists using Rietveld method treatment X-ray diffraction (XRD) data. In study we evaluate accuracy analyses oxisol deferrified clays carried out with...
Although the determination of remaining phosphorus (Prem) is simple, accurate values could also be estimated with a pedotransfer function (PTF) aiming at additional use soil analysis data and/or Prem replacement by an even simpler determination. The purpose this paper was to develop estimate soils State São Paulo based on properties easier or routine laboratory A developed artificial neural networks (ANN) from database values, pH measured in 1 mol L-1 NaF solution (pH NaF) and chemical...
The remaining phosphorus (Prem) has been used for estimating the buffer capacity (PBC) of soils some Brazilian regions. Furthermore, can also be P, S and Zn soil critical levels determined with PBC-sensible extractants defining P to not only in adsorption studies but establishment response curves. objective this work was evaluate effects clay content mineralogy on Prem its relationship pH values measured saturated NaF solution (pH NaF). Ammonium-oxalate-extractable aluminum exerts major...
Leaching of nitrate (NO3-) can increase the groundwater concentration this anion and reduce agronomical effectiveness nitrogen fertilizers. The main soil property inversely related to NO3- leaching is exchange capacity (AEC), whose determination however too time-consuming for being carried out in testing laboratories. For reason, study evaluated if more easily measurable properties could be used estimate resistance subsoils leaching. Samples from subsurface layer (20-40 cm) 24 representative...
A acurada determinação dos teores minerais que constituem a fração argila Latossolos pode contribuir para o aprimoramento de seu uso e manejo. Neste trabalho, caulinita gibbsita da desferrificada foram determinados por calorimetria exploratória diferencial (CED) pela aplicação do método Rietveld dados difratometria raios X (DRX), comparados com seus respectivos calculados pelo alocação. Possivelmente, diferenças cristalográficas entre utilizadas na calibração CED suas respectivas...
Core Ideas pH, clay content, and FeDCB played direct roles in Zn adsorption. Zinc sorption on alkaline soils was higher than acidic as a result of the formation Zn‐precipitate. Clay content affected via cation exchange capacity. accumulation due to increasing industrial activities can change this plant nutrient into pollutant. Soil properties significantly affect bioavailability soils. Twenty‐one with different characteristics were collected from Jiangsu Province, China, ascertain effect...