Now showing items 1-17 of 17

    • 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
      Restricted access - publisher's policy
      Sediments 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 Access
      This 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
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      This 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 ...
    • 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
      Restricted access - publisher's policy
      Atmosphere 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 ...
    • Current applications of recycled aggregates from construction and demolition: a review 

      Dos Rei, Glaydson Simões; Quattrone, Marco; Ambrós, Weslei Monteiro; Cazacliu, Bogdan G.; Hoffmann Sampaio, Carlos (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-30)
      Article
      Open Access
      A 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 Access
      Large 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 Access
      This 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 ...
    • Effect of concrete carbonation on phosphate removal through adsorption process and its potential application as fertilizer 

      Dos Rei, Glaydson Simões; Thue, Pascal S.; Cazacliu, Bogdan G.; Lima, Eder Claudio; Hoffmann Sampaio, Carlos; Quattrone, Marco; Ovsyannikova, Ekaterina; Kruse, Andrea; Dotto, Guillherme Luiz (2020-05-20)
      Article
      Restricted access - publisher's policy
      Concrete slurry is an abundant, cheap, and commonly found waste all over the world where construction activities take place; concrete slurry, which is rich in calcium and metallic oxides, could be successfully employed in ...
    • Fabrication, microstructure, and properties of fired clay bricks using construction and demolition waste sludge as the main additive 

      Dos Rei, Glaydson Simões; Cazacliu, Bogdan G.; Cothenet, Alexis; Poullain, Philippe; Wilhelm, Michaela; Hoffmann Sampaio, Carlos; Lima, Eder Claudio; Ambrós, Weslei Monteiro; Torrenti, Jean-Michel (2020-06-10)
      Article
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      Green routes to prepare or manufacture sustainable building materials have been attracting much attention over the years targeting sustainability issues. In this investigation, for the first time, sludge from the inert ...
    • Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution 

      Novack, Aline M.; Dos Rei, Glaydson Simões; Hackbarth, Fabíola V.; Marinho, Belisa A.; Ðolić, Maja B.; Valle, José A. B.; Hoffmann Sampaio, Carlos; Lima, Eder Claudio; Dotto, Guillherme Luiz; Ulson de Souza, Antônio Augusto; Vilar, Vítor J. P.; Ulson de Souza, Selene M. A. Guelli (2020-05-30)
      Article
      Open Access
      This paper presents the synthesis of a hybrid material through the use of natural pozzolan and titanium(IV) isopropoxide using the sol-gel method and its application in the photocatalytic hexavalent chromium reduction. The ...
    • Fire resistance performance of concrete-PVC panels with polyvinyl chloride (PVC) stay in place (SIP) formwork 

      Murillo, Michel A.; Tutikian, Bernardo F.; Ortolan, Vinícius De Kayser; Hoffmann Sampaio, Carlos (Elsevier, 2019-09-01)
      Article
      Open Access
      Stay-in-place (SIP) formwork is a more-practical alternative to traditional steel or wood formworks due to its improved constructability and durability. The aim of this paper was to study the fire resistance performances ...
    • Modeling the liberation of comminuted scheelite using mineralogical properties 

      Hamid, Sarbast; Alfonso Abella, María Pura; Oliva Moncunill, Josep; Anticoi Sudzuki, Hernán Francisco; Guasch Cascallo, Eduard; Hoffmann Sampaio, Carlos; García-Vallès, Maite; Escobet Canal, Teresa (2019-09-03)
      Article
      Open Access
      In this paper, the modeling of the liberation of scheelite is presented. A pattern of concentration experiments was performed to investigate the scheelite liberation and distribution density calculation procedure. In this ...
    • Nanometric particles of high economic value in coal fire region: opportunities for social improvement 

      Silva, Luis F. O.; Crissien, Tito J.; Schneider, Ismael L.; Blanco, Érika P.; Hoffmann Sampaio, Carlos (2020-05-20)
      Article
      Restricted access - publisher's policy
      Spontaneous coal combustion in the La Guajira coals was studied for the presence of carbon nanophases (e.g., carbon nanotubes), occurrence of rare earth elements (REEs) in them, and the probable mechanisms for concentration ...
    • Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites 

      Silva, Luis F. O.; Crissien, Tito J.; Hoffmann Sampaio, Carlos; Howe, James C.; Dai, Shifeng (2020-03-01)
      Article
      Restricted access - publisher's policy
      Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in ...
    • Optimization and dust emissions analysis of the air jigging technology applied to the recycling of construction and demolition waste 

      Waskow, Regis P.; Dos Santos, Viviane L. G.; Ambrós, Weslei Monteiro; Hoffmann Sampaio, Carlos; Passuello, Ana; Tubino, Rejane Maria Candiota (2020-07-15)
      Article
      Restricted access - publisher's policy
      This work aims to evaluate the use of the air jigging technique, a density-based separation technology commonly applied in mineral processing, to upgrade the quality of mixtures (density and geometric properties) that ...
    • Optimizing the selective precipitation of iron to produce yellow pigment from acid mine drainage 

      de Almeida Silva, Rodrigo; Secco, Marina Paula; Lermen, Richard Thomas; Homrich Schneider, Ivo André; Navarro Hidalgo, Gelsa Edith; Hoffmann Sampaio, Carlos (2019-05-01)
      Article
      Open Access
      Acid mine drainage (AMD) in the coal mining industry is recognized as one of the major sources of environmental damage. The active treatment of AMD involves adding alkaline reagents to wastewater so as to raise pH and to ...
    • Rare earth elements and carbon nanotubes in coal mine around spontaneous combustions 

      Silva, Luis F. O.; Crissien, Tito J.; Tutikian, Bernardo F.; Hoffmann Sampaio, Carlos (2020-04-20)
      Article
      Restricted access - publisher's policy
      Increasing population growth and rise global energy petition have made congregation the requests of energy generation and safety a major challenge global. In another hand nanogeoscience is commencing to develop a viable ...