Browsing by Author "Hoffmann Sampaio, Carlos"
Now showing items 1-20 of 40
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A comparative study of quartz and potassium feldspar flotation process using different chemical reagents
Mohanty, Kalyani; Oliva Moncunill, Josep; Alfonso Abella, María Pura; Hoffmann Sampaio, Carlos; Anticoi Sudzuki, Hernán Francisco (2024-02-04)
Article
Open AccessAn improved method for producing high-purity quartz (Qtz) and potassium feldspar (Kfs) concentrates was developed using various chemical reagents. Froth flotation experiments on a Qtz–Kfs mixture showed that quartz could ... -
A three-dimensional nanoscale study in selected coal mine drainage
Silva, Luis F. O.; Crissien, Tito J.; Milanés Batista, Celene; Hoffmann Sampaio, Carlos (2020-06-01)
Article
Open AccessSediments from coal mine drainages (CMDs) contain large quantities of suspended pollutants (possibly numerous chemical substances) along with sulfates and hazardous elements (e.g., chromium, zinc, copper, lead) that ... -
Adsorption and recovery of phosphate from aqueous solution by the construction and demolition wastes sludge and its potential use as phosphate-based fertiliser
Dos Reis, Glaydson Simões; Cazacliu, Bogdan G; Rodríguez Correa, Catalina; Ovsyannikova, Ekaterina; Kruse, Andrea; Hoffmann Sampaio, Carlos; Lima, Eder Claudio; Dotto, Guillherme Luiz (Elsevier, 2020-02-01)
Article
Open AccessThis study aimed to investigate phosphate removal from aqueous effluents by an inorganic sludge from the inert part of construction and demolition wastes (CSW) as adsorbent. It is also discussed the application of the ... -
Affinity of dual energy X-ray transmission sensors on minerals bearing heavy rare earth elements
Veras, Moacir Medeiros; Young, Aaron Samuel; Born, Cristiano Rocha; Szewczuk, Artur; Bastos Neto, Artur Cezar; Petter, Carlos Otávio; Hoffmann Sampaio, Carlos (2020-03-01)
Article
Open AccessThis work demonstrates the effective use of automatic sensor-based sorting technology as a viable separation method for rare earth element (REE) rich ores composed primarily of xenotime minerals with gagarinite-(Y) and ... -
Analysis of physical properties of coarse aggregates recovered from demolished concrete with a two-stage water jigs process for reuse as aggregates in concrete
Bressanelli Teixeira, Artur; Hoffmann Sampaio, Carlos; Oliva Moncunill, Josep; Cortina Pallás, José Luis; Davila Lima, Mónica Mariana; Herrera La Rosa, Grethel Tamara (Multidisciplinary Digital Publishing Institute (MDPI), 2024-07-19)
Article
Open AccessThe present work analyses the physical characteristics of aggregates recovered with the waterjigging process from comminuted concrete. In this work, conventional concrete (C16/20) was crushed to a top size of 20 mm with a ... -
Aplicação e avaliação do uso de concentrador centrifugo a5-b para obtenção de concentrado de minério primário de au – Peixoto de Azevedo (mt)
Souza Medeiros, Luiz Henrique; Couto Nascimento, Newton Diego; Hoffmann Sampaio, Carlos; Araujo Silva, José Geraldo; Antão da Silva, Bruno; Kutkoski, Rafael Francisco (Galoá, 2022)
Conference lecture
Open AccessAtualmente, num mundo cada vez mais competitivo, o rendimento das atividades humanas deve ser o maior possível, seja através da melhoria de técnicas ou tecnologias. Com o preço do ouro em alta e baixos teores de ouro nas ... -
Aprovechamiento de residuos mineros para la fabricación de nuevos materiales
Anticoi Sudzuki, Hernán Francisco; Alfonso Abella, María Pura; Garcia Valles, Maite; Hoffmann Sampaio, Carlos; Oliva Moncunill, Josep; Bascompta Massanes, Marc; Martínez Alcalá, Arnau (2023)
Conference report
Open AccessEl consumo actual de recursos minerales es muy elevado, conllevando una elevada generación de residuos durante su explotación y procesado industrial. La utilización de estos residuos como materia prima representa una ... -
Atmospheric nanocompounds on Lanzarote Island: vehicular exhaust and igneous geologic formation interactions
Silva, Luis F. O.; Hoffmann Sampaio, Carlos; Pinto Osorio, Diana del Carmen; Neckel, Alcindo; Oliveira, Marcos L.S. (2020-09-01)
Article
Open AccessAtmosphere contamination management is one of the most important features in pollution risk management. The worldwide rise in tourism increases apprehension about its probable destructive conservation influence on various ... -
Caracterização de rejeito aluvionar de minério de ouro da região de Peixoto de Azevedo (mt)
Couto Nascimento, Newton Diego; Hoffmann Sampaio, Carlos; Araujo Silva, José Geraldo; Souza Medeiros, Luiz Henrique; Lopes Amaral, Matheus; da Silva Dias, Daniel (Galoá, 2022)
Conference lecture
Open AccessA extração de ouro nos garimpos, que na maioria das vezes é feita de forma rudimentar (apenas por gravimetria), não garante a obtenção de um bom rendimento, o que gera rejeitos (curimã) com alto teor de minério (ouro). ... -
Characterization of demolished concretes with three different strengths for recycling as coarse aggregate
Hoffmann Sampaio, Carlos; Cazacliu, Bogdan G.; Ambrós, Weslei Monteiro; Kronbauer, Márcio André; Tubino, Rejane Maria Candiota; Dal Molin, Denise C. C.; Oliva Moncunill, Josep; Miltzarek, Gérson L.; Waskow, Regis P.; Dos Santos, Viviane L. G.; Silva, Luis F. O. (2021-07-26)
Article
Open Access -
Concentração de resíduos de construção e demolição por sensor-based sorting
Hoffmann Sampaio, Carlos; Cazacliu, Bogdan G.; Ambrós, Weslei Monteiro; Petter, Carlos Otávio; Veras, Moacir Medeiros; Cortina Pallás, José Luis; Oliva Moncunill, Josep (Galoá, 2022)
Conference lecture
Open AccessOs Resíduos de Construção e Demolição (RCD) apresentam composições diferentes, dependendo da construção do prédio, tamanho da cidade, desenvolvimento do país etc. Os principais componentes do RCD são o concreto e a cerâmica ... -
Concentration plants of construction and demolition waste for coarse aggregate recycling
Hoffmann Sampaio, Carlos; Otávio Petter, Carlos; de Freitas Sampaio, Luisa; Oliva Moncunill, Josep; Ambrós, Weslei Monteiro; Bressanelli Teixeira, Artur (2024-06-18)
Contribution to periodical
Open AccessThis paper presents simulations of different concentration plants that use Inert Construction and Demolition Waste as feed to generate coarse aggregates from old concretes. Different feed materials were studied: CDW generated ... -
Construction and Demolition Waste (CDW) recycling
Pourmohammad Golloujeh, Mahsa; Oliva Moncunill, Josep; Hoffmann Sampaio, Carlos (2023-10-03)
Part of book or chapter of book
Open AccessThe building industry, even though it contributes significantly to a nation’s socioeconomic development, is directly responsible for negative environmental effects including high-energy use and CO2 emission, among others. ... -
Construction and demolition waste recycling through conventional jig, air jig, and sensor-based sorting: a comparison
Hoffmann Sampaio, Carlos; Ambrós, Weslei Monteiro; Cazacliu, Bogdan G.; Oliva Moncunill, Josep; Miltzarek, Gérson L.; Salvador Kuerten. Ariane; Liendo, Maria Alejandra; Silva, Luis.F.O.; Veras, Moacir Medeiros (2021-08-21)
Article
Open Access -
Coupling of attrition and accelerated carbonation for CO2 sequestration in recycled concrete aggregates
Dos Reis, Glaydson Simões; Cazacliu, Bogdan G.; Artoni, Riccardo; Torrenti, Jean-Michel; Hoffmann Sampaio, Carlos; Lima, Eder Claudio (Elsevier BV, 2021-07)
Article
Open Access -
Current applications of recycled aggregates from construction and demolition: a review
Dos Reis, Glaydson Simões; Quattrone, Marco; Ambrós, Weslei Monteiro; Cazacliu, Bogdan G.; Hoffmann Sampaio, Carlos (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-30)
Article
Open AccessA literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) ... -
Demolished concretes recycling by the use of pneumatic jigs
Hoffmann Sampaio, Carlos; Cazacliu, Bogdan G.; Ambrós, Weslei Monteiro; Kronbauer, Márcio André; Tubino, Rejane Maria Candiota; Dal Molin, Denise C. C.; Oliva Moncunill, Josep; Miltzarek, Gérson L.; Waskow, Regis P.; Dos Santos, Viviane L. G. (2020-01-01)
Article
Open AccessLarge quantities of construction and demolition waste is generated annually around the world. Part of this material is processed in recycling plants. After removing metals, fines and lights, the construction and demolition ... -
Destoning the Moatize coal seam, Mozambique, by dry jigging
Hoffmann Sampaio, Carlos; Ambrós, Weslei Monteiro; Cazacliu, Bogdan G.; Oliva Moncunill, Josep; Selemane José, David; Miltzarek, Gérson L.; Schadach de Brum, Irineu Antônio; Petter, Carlos Otávio; Zanetti Fernandes, Eunírio; Silva Oliveira, Luis Felipe (2020-08-31)
Article
Open AccessThis paper proposes pre-beneficiation studies by air jigs of the coal layers from a Moatize coal deposit. Pre-beneficiation, also called destoning, removes tailings before the beneficiation plant. The air jigs operate in ... -
Development of a physical separation route for the concentration of base metals from old wasted printed circuit boards
Walburga Keglevich de Buzin, Pedro Jorge; Ambrós, Weslei Monteiro; Schadach de Brum, Irineu Antônio; Tubino, Rejane Maria Candiota; Hoffmann Sampaio, Carlos; Oliva Moncunill, Josep (2021-09-18)
Article
Open Access -
Editorial for Special Issue “Gravity Concentration”
Hoffmann Sampaio, Carlos; Ambrós, Weslei Monteiro (2021-11-30)
Article
Open Access