A5062101815- Clay minerals and soil interactions
- Iron oxide chemistry and applications
- Soil and Unsaturated Flow
- Soil Carbon and Nitrogen Dynamics
- Adsorption and biosorption for pollutant removal
- Pesticide and Herbicide Environmental Studies
- Heavy metals in environment
- Pharmaceutical and Antibiotic Environmental Impacts
- Soil and Water Nutrient Dynamics
- Electrochemical Analysis and Applications
- Coal and Its By-products
- Environmental remediation with nanomaterials
- Electrokinetic Soil Remediation Techniques
- Minerals Flotation and Separation Techniques
- Geophysical and Geoelectrical Methods
- Arsenic contamination and mitigation
- Chemical Analysis and Environmental Impact
- Water Treatment and Disinfection
- Geotechnical and construction materials studies
- Analytical chemistry methods development
- Radioactive element chemistry and processing
- Soil Geostatistics and Mapping
- Mine drainage and remediation techniques
- Plant Micronutrient Interactions and Effects
- Nanoparticles: synthesis and applications
Universidad de Santiago de Chile
2015-2025
Universidad Bernardo O'Higgins
2010-2025
Millennium Initiative for Collaborative Research on Bacterial Resistance
2013-2018
Instituto de Química y Fisicoquímica Biológicas
2015
Abstract Anthropogenic activities like agriculture have resulted in increased concentrations of some trace elements toxicological and environmental concern soils. Application fertilizers has been one the major inputs these contaminants to agricultural soils developing countries. Twenty-two fertilizers, including straight nitrogen (N), phosphorus (P), potassium (K), NK micronutrient sources, were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES) for arsenic (As),...
Limited methods exist to determine the composition of particle mixtures. This research presents a simple UV-vis-spectroscopy-based method for separate quantification particles mixtures considering following: synthesized ferrihydrite, commercial Fe2O3, and natural allophane. Calibration curves adsorption/scattering coefficients are determined each at different wavelengths. is main input solve equation systems and, ultimately, quantify concentration in binary The limit detection varies with...
The volcanic ash-derived soils have strong capacity to retain phosphorus (P). P in 10 virgin Ultisols and Andisols Southern Chile their clay size fractions were fractionated into inorganic, fulvic, humic using an acid base sequential extraction procedure. These had similar mineralogy, formed under different climatic conditions, native vegetation. They are representative of the major agricultural areas. total content ranges from 733 mg kg−1 3470 kg−1. As groups, higher concentrations than...
Abstract. A critical aspect of predicting soil organic carbon (SOC) concentrations is the lack available information; where information on characteristics available, it usually focused regions high agricultural interest. To date, in Chile, a large proportion SOC data have been collected areas intensive or forestry use; however, vast beyond these forms land use few no available. Here we present new database for country, which result an unprecedented national effort under framework Global Soil...
Glyphosate ( N ‐phosphonometylglycine) is widely used due to its broad spectrum of activity and nonselective mode action. In Chile it the most herbicide, but adsorption behavior in abundant widespread variable charge soils not well understood. this study, three volcanic ash–derived were selected, including Andisols (Nueva Braunau Diguillin) Ultisols (Collipulli), evaluate kinetics, equilibrium isotherms, effect pH glyphosate adsorption. The influence on soil phosphorus retention was also...
Abstract The effect of tillage systems and crop rotation on microbial biomass phosphorus (MBP) acid phosphatase (P‐ase) activity, the amount different (P) forms measured by 31 P‐NMR spectroscopy were studied a field experiment carried out in temperate Ultisol from southern Chile. Two systems, no (NT) conventional (CT) two rotations, oat–wheat (OW) lupine–wheat (LW) evaluated 4 yr after start to determine effects such management some soil biological parameters P at three depths (0–5, 0–10...
Synergy between beds of Mo/SiO2 and Co/SiO2 separated by 5 mm SiO2 in the hydrodesulfurization (HDS) gas oil, carried out a high-pressure continuous-flow micro-reactor, was demonstrated.
Forest fires are a common occurrence in central southern Chile where soils mostly Andisols. The ash deposits may alter the chemical properties of burned areas and nearby agricultural lands. In column experiment, three Andisols found this region were treated with 2-cm-thick deposit on surface leached 12 pore volumes water for 3 months. At end leaching, ash-treated their respective control sectioned, charge characteristics each soil section determined by electrophoretic mobility test...