Results 61 to 70 of about 85,807 (168)

Exploring the Potential of Multiple Brazilian Clays as Adsorbents in Corn Starch Hydrogels for the Removal of Potentially Toxic Metal

open access: yesChemistrySelect, Volume 10, Issue 37, October 6, 2025.
This study synthesized starch hydrogel compositesreinforced with six clays to remove Cd(II), Cr(VI), Cu(II), Mn(II), Ni(II), andZn(II) from water. Clay incorporation enhanced porosity, water absorption, andthermal stability, improving adsorption.
Rafaela R. Ferreira   +5 more
wiley   +1 more source

Exploração mineral de pequena escala em perímetros irrigados de Petrolina, Pernambuco no semiárido brasileiro

open access: yesRevista de Geografia (Recife)
As famílias que moram próximo às mineradoras sofrem com as suas ações, a retirada das rochas, ocasiona explosões, movimentando o solo com vibração do terreno.
Fredson Pereira da Silva   +3 more
doaj   +1 more source

‘Quanto Vale a Sua Vida?’: Individuals' Resistance Under Corporate Repression

open access: yesBulletin of Latin American Research, Volume 44, Issue 4, Page 296-309, October 2025.
In Minas Gerais, Brazil, activists challenging Vale's extractive activities are often portrayed as obstacles to economic progress, while their resistance is criminalised. Paradoxically, as corporate repression intensifies, individual forms of dissent persist and evolve.
Léa Lebeaupin‐Salamon
wiley   +1 more source

Conflitos de uso em área de proteção ambiental: água, mineração e agricultura [PDF]

open access: yes, 2002
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Ciências Humanas.O objetivo desta tese é o de discutir o uso e a ocupação de unidades de conservação de manejo sustentável do ...
Silva, Francisco Jose Barretto da
core  

The first pterosaur from the Bauru Group: an azhdarchid from the Upper Cretaceous of Brazil

open access: yesPapers in Palaeontology, Volume 11, Issue 5, September/October 2025.
Abstract The vertebrate fossil record of the Bauru Group (Upper Cretaceous, southeastern Brazil) is remarkably rich, with a predominance of titanosaurs and crocodyliforms, alongside theropods, turtles, squamates, fishes and even small mammals. In contrast, pterosaur remains from the Bauru Group have remained elusive until now.
Ariovaldo A. Giaretta   +3 more
wiley   +1 more source

Representação contra o Diretor da Saint John d'el Rey Mining Company, Limited (Morro Velho) 1861 Representation against the Director of the Saint John d'el Rey Mining Company, Limited (Morro Velho) 1861

open access: yesVaria História, 2012
Publicamos a seguir um documento dirigido ao Imperador dom Pedro II, em 1861, denunciando, sob o ponto de vista de um eclesiástico católico, as interferências praticadas por James Newell Gordon, superintendente da Saint John d'el Rey Mining Company ...
Rafael de Freitas e Souza
doaj   +1 more source

Co‐combustion of coal and biomass waste in pilot‐scale for energy use

open access: yesEnvironmental Progress &Sustainable Energy, Volume 44, Issue 3, May/June 2025.
Abstract The use of biomass in co‐combustion systems using fluidized bed technology is considered a viable alternative to reduce the emission of pollutants. The herein study presents an experimental analysis to determine the technical feasibility of using run‐of‐mine (ROM) coal and its waste combined with biomass in a combustor of bubbling fluidized ...
Pedro Rodrigo Silva Moura   +6 more
wiley   +1 more source

Florística da vegetação arbustivo - arbórea colonizadora de uma área degradada por mineração de caulim, em Brás Pires, MG Floristic of shrub - tree vegetation colonizing an area degraded by kaolin mining, in Brás Pires, MG

open access: yesRevista Árvore, 2005
Este estudo teve como objetivos analisar a composição florística da vegetação arbustivo-arbórea colonizadora de uma área degradada por mineração de caulim, em Brás Pires, MG, compará-la com outros fragmentos florestais e caracterizar aspectos de auto ...
Fernanda Squizzatto de Araújo   +4 more
doaj   +1 more source

Evidenciação de Informações Socioambientais, Teoria Institucional e Disclosure: Um Estudo com Mineradoras Brasileiras [PDF]

open access: yes, 2015
TCC (Graduação) - Universidade Federal de Santa Catarina. Centro Socioeconômico. Curso de Ciências ContábeisEste estudo tem por objetivo analisar o nível de evidenciação de informações socioambientais entre os relatórios anuais e de sustentabilidade das ...
Junior, David Daniel Hammes
core  

BioTIME 2.0: Expanding and Improving a Database of Biodiversity Time Series

open access: yesGlobal Ecology and Biogeography, Volume 34, Issue 5, May 2025.
ABSTRACT Motivation Here, we make available a second version of the BioTIME database, which compiles records of abundance estimates for species in sample events of ecological assemblages through time. The updated version expands version 1.0 of the database by doubling the number of studies and includes substantial additional curation to the taxonomic ...
Maria Dornelas   +484 more
wiley   +1 more source

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