Results 21 to 30 of about 3,789 (186)

Differential Effects of the COVID-19 Lockdown and Regional Fire on the Air Quality of Medellín, Colombia

Atmosphere, 2021
Governments’ responses to the COVID-19 pandemic provide a unique opportunity to study the effects of restricted socioeconomic activity on air quality. Here, we study the changes in air pollution levels during the lockdown in Medellín and its metropolitan
Juan J. Henao, Angela M. Rendón, K. Santiago Hernández, Paola A. Giraldo-Ramirez, Vanessa Robledo, Jose A. Posada-Marín, Natalia Bernal, Juan F. Salazar, John F. Mejía   +8 more
doaj   +1 more source

Revealing the Transmission Hologram's Refractive Index Profile Stored in a Photohydrogel: A Structural Characterization

Advanced Optical Materials, EarlyView.
A theoretical model is developed to visualize three‐dimensional refractive index profiles in transmission holographic gratings. In this work, it is applied to photopolymerizable hydrogels, enabling detailed analysis of the internal structure of recorded holograms and their evolution under different degradation conditions.
Belén Nieto‐Rodríguez, Manuel G. Ramírez, José Carlos García‐Vázquez, Tomás Lloret, Inmaculada Pascual   +4 more
wiley   +1 more source

Risk and Vulnerability Facing Hydrogeological Hazards of Mass Movements in the 'Quebrada del Diablo' Ravine, Tacna, Peru

Revista de Estudios Latinoamericanos sobre Reducción del Riesgo de Desastres
The study conducted in 'Quebrada del Diablo' ravine, located in the Tacna region, Peru, reveals high levels of vulnerability in the human settlements of this area. Vulnerabilities were identified in environmental, physical, economic, social, educational,
Raul Cartagena Cutipa, Zoraira del Pilar Choque Chambilla, Pablo Alejandro Guillermo Medina, Angie Mercedes Martínez Tesillo, Humberto Jacinto Santana Soto, Martha Sofia Ventura Aco   +5 more
doaj   +1 more source

Estudio piloto para el tratamiento de lixiviados generados en un botadero controlado

Gestión y Ambiente, 2018
El objetivo del estudio fue evaluar la eficiencia de una laguna de estabilización aerobia piloto anexa al tratamiento primario existente para los lixiviados producidos en un botadero controlado ubicado en la Provincia de Pichincha-Ecuador. Se caracterizó
Lizbeth Pesántes, Verónica Ruiz, Marcelo Muñoz, María Belén Aldás   +3 more
doaj   +1 more source

Efecto de la resistencia externa y área superficial del electrodo de grafito en la biodegradación de la materia orgánica y generación de bioelectricidad en celdas de combustible microbiano / Effect of the external resistance and surface area of graphite electrode on biodegradation of organic matter and generation of bioelectricity in microbial fuel cells

Tecnología y ciencias del agua, 2020
Las celdas de combustible microbiano (CCM) es una tecnología emergente para la generación de energía eléctrica a partir de materia biodegradable, teniendo como catalizador a los microorganismos.
Gustavo Torres-Zamata, Aracel Erica Condori-Pacheco, Joel Hugo Fernandez-Rojas, Noe Benjamin Pampa-Quispe   +3 more
doaj   +1 more source

Prospecting of Architectural Features Using LiDAR‐UAV Technology, Deep Neural Networks and Visualization Techniques: A Case Study in Kuélap and Cambolín (NW Peru)

Archaeological Prospection, EarlyView.
ABSTRACT High‐resolution and accurate synoptic images of terrestrial topography, even in densely forested areas, have proven valuable for archaeology by enabling the identification and characterization of relief patterns associated with ancient human activities. This study presents a novel approach that integrates digital terrain models (DTMs) obtained
Jhon A. Zabaleta‐Santisteban, Rolando Salas López, Angel J. Medina‐Medina, Katerin M. Tuesta‐Trauco, Abner S. Rivera‐Fernandez, Nerci M. Noriega‐Salazar, José A. Sánchez‐Vega, Teodoro B. Silva‐Melendez, Marlen A. Grandez‐Alberca, Jhonsy O. Silva‐López, Nilton B. Rojas‐Briceño, Manuel Oliva‐Cruz, Alexander Cotrina‐Sanchez, Elgar Barboza   +13 more
wiley   +1 more source

Biorremediación de suelos contaminados con aceite automotriz usados mediante sistema de biopilas

ESPACIO I+D: Innovación más Desarrollo, 2016
n la investigación se realizó la biorremediación de suelo contaminado con aceites usados de talleres de servicio automotriz mediante biopilas. Se emplearon cuatro muestras de suelo proveniente de la Unidad de Manejo Ambiental (UMA) "La Huella" ejido ...
Héctor Guillermo Anza Cruz, Paula Deyanira Orantes Calleja, Raúl González Herrera, Alejandro Ruíz Marín, Eduardo Espinoza Medinilla, Rebeca Isabel Martínez Salinas, Carlos Manuel García Lara, Pedro Vera Toledo   +7 more
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Economic and environmental implications of the development of UASB reactors in Mexico for sustainable industrial wastewater treatment

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The objective of this work is to demonstrate that the inclusion of an up‐flow anaerobic sludge bed (UASB reactor) within an industrial wastewater treatment plant reduces the plant's investment and operating costs compared to a system based solely on conventional complete‐mix activated sludge (CMAS), operating under the same design principles ...
Juan Manuel Morgan‐Sagastume, Adalberto Noyola   +1 more
wiley   +1 more source

Green and sustainable synthesis of magnetite from copper slag via citrate complexation for methylene blue dye removal from water

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel, Karen Valencia García, Tania‐Ariadna García‐Mejía, Agileo Hernández‐Gordillo, Rosa‐María Ramírez‐Zamora   +4 more
wiley   +1 more source

Editorial

Revista Facultad de Ingeniería, 2010
La Facultad de  Ingeniería de la Universidad Pedagógica y Tecnológica de Colombia, en respuesta a los retos que impone la sociedad actual, especialmente la necesidad de trascender el compromiso profesionalizante, se encuentra incursa en un plan de ...
Gonzalo Riaño Salamanca
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