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Fenton-like processes and adsorption using iron oxide-pillared clay with magnetic properties for organic compound mitigation
(Springer, 2015-01-01)
In this work, a new step was added to the classic route of iron-pillared clay obtention, resulting in a material with both magnetic and oxidative properties. The saturation of the material surface intercalated with trinuclear ...
Litogeochemistry and mineral chemistry of angico dos dias metacarbonatite rocks, divise Bahia/PiauÍ, BrazilLitogeoquímica e química mineral das rochas metacarbonatíticas de angico dos dias, divisa Bahia/Piauí, Brasil.
(2018-01-01)
The rocks of Angico dos Dias Metacarbonatite Complex occur in northernmost region of Bahia and consist of metacarbonatites, several metasyenites, metapyroxenites, alkali metadiorites, tremolite rock, biotite rock, ...
Geobiological and diagenetic insights from Malvinokaffric Devonian biota (Chapada group, Paraná Basin, Brazil): Paleobiological and paleoenvironmental implications
(2017-04-01)
This study tests the presence of differential preservation in the Devonian Malvinokaffric fauna from the Chapada Group (Paraná Basin, Brazil). Results of EDXRF, EDS, Raman Spectroscopy, and petrographic analyses show ...
Magnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in water
(2018-11-01)
This work addresses the development of a magnetically extractable magnetite-silica-titania photocatalyst to be applied in the degradation of organic compounds in water. MCM-41 silica was successfully deposited on magnetite, ...
Fabrication of rGO/α-Fe2O3 electrodes: characterization and use in photoelectrocatalysis
(2020-01-01)
In the current study, the synthesis of hematite (α-Fe2O3) at different temperatures (750 and 900 °C), and reduced graphene oxide (rGO), obtained from an adaptation to the Hummers’s method, was evaluated. These materials ...
Exudation of organic acid anions by tropical grasses in response to low phosphorus availability
(Nature Research, 2020-10-12)
It has been suggested that some tropical grasses can acquire phosphorus (P) from hematite and gypsite by exuding organic acid anions (OAs). However, it remains to be determined exactly which OAs could be involved in each ...
Degradation of organic compounds in a fenton system based on chitosan/Fe-0/Fe2O3 composites: a theoretical and experimental study
(Springer, 2016-02-01)
Chitosan is a polymer with interesting characteristics for use in catalysis, such as biocompatibility, high chemical reactivity and stability under various conditions. Seeking new applications, a new hybrid material was ...
Characterization of clays from the Corumbataí formation used as raw material for ceramic industry in the Santa Gertrudes district, São Paulo, Brazil
(2016-11-01)
The Ceramic District of Santa Gertrudes (CDSG) is the largest producer of ceramic floor and wall tiles in Brazil. Tile manufacturers in the CDSG use the single raw material, clayey rocks from the Corumbataí formation. ...
Formação corumbataí na região de rio claro/sp: Petrografia e implicações genéticas
(2016-01-01)
The Corumbataí Formation that outcrops in Rio Claro (São Paulo State, Brazil) is represented predominantly by clayey siltstones interbedded with sandy siltstones, consisting of illite, quartz, feldspars, carbonates, ...
Geoquímica e proveniência dos sedimentos da formação corumbataí na região de Rio Claro/SP
(2017-01-01)
Corumbataí Formation in Rio Claro – Limeira – Araras (São Paulo State, Brazil) is represented by a succession of siltstones mainly consisting of phyllosilicates (predominating illite, although montmorillonite, biotite, ...