Production of materials with alumina and ashes from incineration of chromium tanned leather shavings: Environmental and technical aspects

Basegio, Tania Maria; Haas, CN; Pokorny, Andrea; Bernardes, Andréa Moura; Bergmann, Carlos Pérez

doi:10.1016/j.jhazmat.2006.03.059

Cited by 41 publications

(19 citation statements)

References 21 publications

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“…Nesse sentido alguns trabalhos [2,[12][13][14] já vêm buscando agregar valor a resíduos industriais através de sua incorporação em formulações cerâmicas para a produção de refratários, porcelanas e corpos mulíticos. Corpos mulíticos encontram largo leque de aplicações em cerâmicas convencionais (porcelanas, louças, refratários, etc.)…”

Section: Introductionunclassified

Utilização do resíduo do beneficiamento do caulim para a produção de corpos mulíticos

et al. 2007

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Nos últimos anos a indústria da extração e beneficiamento mineral vem sendo mencionada como fonte de agressão ambiental e poluição devido a grande quantidade de resíduos gerados. A indústria do beneficiamento do caulim reflete esse quadro, gerando elevada quantidade de resíduo por ano. Assim, este trabalho tem por objetivo analisar a viabilidade de utilização do resíduo do beneficiamento do caulim para a produção de corpos mulíticos. Formulações contendo resíduo de caulim e de alumina foram desenvolvidas e homogeneizadas por mistura via úmida em moinho de bolas. Em seguida confeccionaram-se corpos de prova por prensagem uniaxial, que foram submetidos a sinterização em diferentes temperaturas. Após queima os materiais foram caracterizados por difração de raios X e determinação da absorção de água, densidade aparente, retração de queima e módulo de ruptura à flexão. Os resultados evidenciaram que a temperatura de queima mais adequada varia de acordo com a composição e o teor de resíduo presente nas formulações, que temperaturas de queima muito elevadas podem conduzir o material a superqueima e que formulações contendo teores de resíduos superiores a 40% podem ser utilizadas para a produção de corpos mulíticos com elevada resistência mecânica, da ordem de 75MPa.

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Section: Introductionunclassified

Utilização do resíduo do beneficiamento do caulim para a produção de corpos mulíticos

et al. 2007

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“…Many authors [30][31][32] have described the human and ecosystem impacts of anthropogenic waste and pollution. There are few published studies investigating the impact on the aquatic ecosystem, limited primarily to C60, nanotubes and titanium dioxide, with crustacean Daphnia magna the main test species [33].…”

Section: Nanowaste Ecotoxicology and Treatmentmentioning

confidence: 99%

Nanomaterials environmental risks and recycling: Actual issues

Živkovič¹,

Balanović²,

Mitovski³

et al. 2014

Rec odr raz

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2 Univerzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju, Beograd 3 Institut za tehnologiju nuklearnih i drugih mineralnih sirovina, Beograd 4 Univerzitet u Prištini, Fakultet tehničkih nauka, Kosovska Mitrovica Primljen: 7. april 2014. Prihvaćen: 22. maj 2014.IZVOD -Nanotehnologije se smatraju pokretačkom snagom nove industrijske revolucije. Nanonauka je tokom poslednje decenije značajno evoluirala od nauke koja se isključivo razvijala u laboratorijskim uslovima, do njene aplikacije u primenjenim tehnologijama. Trenutno, nanomaterijali se koriste u širokom spektru komercijalnih proizvoda kao što su elektronske komponente, sportska oprema, kreme za sunčanje i u biomedicinske svrhe. Veličina nanočestica omogućava im snažnu interakciju sa biološkim strukturama, tako da nanočestice predstavljaju potencijalni rizik po životnu sredinu i zdravlje ljudi. Nanometar kao veličina takođe predstavlja problem za separaciju, reciklažu i ponovno korišćenje nanočestica. Dakle, proizvodnja nanomaterijala u industrijskim razmerama i njihova primena mogli bi imati značajan uticaj na zdravlje ljudi i životnu sredinu ili stvorili probleme pri reciklaži. Sveobuhvatni termin "nanotehnologija" nije dovoljno precizan kada se radi o upravljanju rizicima. Procena mogućih rizika zavisi od razmatranja životnog ciklusa materijala koji se proizvodi, a koji uključuje razumevanje procesa i materijala koji se koriste u proizvodnji, verovatne interakcije između proizvoda i pojedinaca ili životne sredine tokom proizvodnje nanomaterijala i njegovog životnog ciklusa, kao i metoda koje se koriste za njihovo konačno odlaganje. Sa stanovišta kontrole rizika, neophodno je identifikovati kritične faze, koje je neophodno detaljno istražiti. Pregled aktuelnih trendova ekoloških rizika i reciklaži nanomaterijala prezentovan je u ovom radu.ABSTRACT -Nanotechnologies are being spoken of as the driving force behind a new industrial revolution. Nanoscience has matured significantly during the last decade as it has transitioned from bench top science to applied technology. Presently, nanomaterials are used in a wide variety of commercial products such as electronic components, sports equipment, sun creams and biomedical applications. The size of nanoparticles allows them to interact strongly with biological structures, so they present potential human and environmental health risk. Nanometer size presents also a problem for separation, recovery, and reuse of the particulate matter.

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“…Direct use of the solid leather wastes was also studied for their ability to remove oils, oily wastes and hydrocarbons from contaminated water [21]. Ceramic materials prepared with alumina and ashes of chrome tanned shavings were reported [22]. The effect of incorporation of chromium leather shavings in the preparation of Portland cement clinker was studied [23].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Composite Sheets from Collagenous and Chromium–Collagen Complex Wastes Using Polyvinylpyrrolidone: Two Problems, One Solution

Ashokkumar

Thanikaivelan

Murali

et al. 2010

Waste Biomass Valor

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The disposal of huge quantities of leather wastes in open environment produces several toxic contaminants. An alternative to disposal of these wastes is to reuse them. In the present work, we have proposed a method to utilize collagen and chrome shaving wastes (CCS) to prepare composite sheets employing polyvinylpyrrolidone (PVP). The formed CCS/PVP composite sheets were characterized for their thermal, mechanical and morphological properties. It has been found that the mechanical properties of the composite sheets increase as the concentration of PVP increases from 2.5 to 10 wt%. Scanning electron microscopic studies reveal that the incorporation of PVP in the composite sheets resulted in increased interfacial adhesion thereby leading to reduced debonding between fibers. Fourier-transform infrared analysis of the composite sheets revealed the presence of dominant peaks associated with both collagen as well as PVP. It has also been demonstrated that the thermal stability of the formed composite sheets increases significantly as the concentration of PVP increases. These results demonstrate the homogeneity of the developed composite sheets. The obtained results suggest that the PVP incorporated composite sheets were found to have improved characteristics and hence suitable for numerous applications in footwear, clothing and related industries.

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Production of materials with alumina and ashes from incineration of chromium tanned leather shavings: Environmental and technical aspects

Cited by 41 publications

References 21 publications

Utilização do resíduo do beneficiamento do caulim para a produção de corpos mulíticos

Utilização do resíduo do beneficiamento do caulim para a produção de corpos mulíticos

Nanomaterials environmental risks and recycling: Actual issues

Preparation and Characterization of Composite Sheets from Collagenous and Chromium–Collagen Complex Wastes Using Polyvinylpyrrolidone: Two Problems, One Solution

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