Influence of firing temperature on the ceramic properties of Triassic clays from Tunisia

Baccour, H.; Medhioub, Mounir; Jamoussi, Fakher; Mhiri, T.

doi:10.1016/j.jmatprotec.2008.06.055

Cited by 127 publications

(95 citation statements)

References 8 publications

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“…100 µm 100 µm 100 µm 100 µm aproximadamente 8% [36]. Observou-se similaridade na coloração das peças: os corpos de prova queimados a 800 °C apresentaram uma tonalidade marrom, os queimados a 900 °C adquiriram cor alaranjada e a 1000 °C cor vermelha.…”

Section: Resultsunclassified

Resíduo de quartzito - matéria-prima alternativa para uso em massas de cerâmica estrutural

et al. 2016

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INTRODUÇÃOAo longo do tempo, os recursos naturais têm sido utilizados de forma indiscriminada, gerando quantidades significativas de resíduos [1], o que tem causado sérios danos ao meio ambiente, havendo uma necessidade global de gerenciamento e reaproveitamento dos mesmos. As práticas de gestão dos resíduos têm evoluído e, devido à quantidade gerada e sua complexidade, o destino desses tornou-se uma das principais preocupações da sociedade [2]. Os processos de reciclagem de resíduos sólidos buscam reduzir o consumo de matérias-primas, minimizar os problemas de poluição e os custos de tratamento [3], estimulando pequenas e grandes empresas a procurar soluções alternativas para os resíduos, Bodocongó, Campina Grande, renato.materiais@gmail.com, valmir_jspb@yahoo.com.br, helio.lira@ufcg.edu.br, gelmires.neves@ufcg.edu.br, romualdomenezes@gmail.com, lisiane.navarro@ufcg.edu.br Resumo A geração de resíduos é cada vez maior e o destino adequado desses tornou-se crucial para a preservação do meio ambiente. Portanto, a utilização de alguns resíduos sem massas utilizadas nas indústrias da cerâmica tradicional, além de ser uma solução ambientalmente correta, pode vir a reduzir os custos de processamento. Este trabalho tem como objetivo estudar a viabilidade da incorporação do resíduo de quartzito em uma massa que é utilizada na fabricação de produtos de cerâmica estrutural. As matérias-primas foram submetidas à caracterização física, química e mineralógica. Foram formuladas massas com 5, 10 e 15% em massa de resíduo de quartzito e, posteriormente, conformadas por prensagem uniaxial, e queimadas a 800, 900 e 1000 ºC. considerando a legislação ambiental [4]. Em vários países, milhões de toneladas de resíduos inorgânicos são gerados a cada ano; muitos são oriundos das atividades de empresas mineradoras, que são descartados em aterros sem nenhum tratamento prévio, causando problemas à saúde da população e sérios impactos ambientais [5]. O quartzito é classificado geologicamente como uma rocha metamórfica, composta quase que inteiramente de grãos de quartzo [6]. No processamento das placas de quartzitos são gerados dois tipos de resíduos, sendo o primeiro oriundo da serragem dos blocos para transformação em placas, e o segundo proveniente dos cortes das placas que são chamados de aparas. Estes resíduos apresentam na sua composição química conteúdos apreciáveis de óxido de silício (SiO 2 ),

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Section: Resultsunclassified

Resíduo de quartzito - matéria-prima alternativa para uso em massas de cerâmica estrutural

et al. 2016

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“…This is related to the volume expansion of closed pores in the ceramic tiles due to the improvement of gases pressure inside the closed pores (Aripin et al, 2014). Moreover, a higher water absorption value shows higher apparent porosity of the ceramic tiles (Baccour et al, 2009;Martín-Márquez et al, 2008). Consequently, the water absorption and porosity of ceramic tiles decrease with rising sintering temperature in the range of 1100-1250ºC.…”

Section: Physical Properties Of Ceramic Tiles At Various Sintering Comentioning

confidence: 99%

Ceramic tiles with black pigment made from stainless steel plant dust: Physical properties and long-term leaching behavior of heavy metals

Zhu

Cai

et al. 2016

Journal of the Air & Waste Management Association

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Stainless steel plant dust is a hazardous by-product of the stainless steelmaking industry. It contains large amounts of Fe, Cr, and Ni, and can be potentially recycled as a raw material of inorganic black pigment in the ceramic industry to reduce environmental contamination and produce value-added products. In this paper, ceramic tiles prepared with black pigment through recycling of stainless steel plant dust were characterized in terms of physical properties, such as bulk density, water absorption, apparent porosity, and volume shrinkage ratio, as well as the longterm leaching behavior of heavy metals (Cr, Ni, Pb, Cd, and Zn). The results show that good physical properties of ceramic tiles can be obtained with 8% pigments addition, sample preparation pressure of 25 MPa, and sintering at 1200 ºC for 30 min. The major controlling leaching mechanism for Cr and Pb from the ceramic tiles is initial surface wash-off, while the leaching behavior of Cd, Ni, and Zn from the stabilized product is mainly controlled by matrix diffusion. The reutilization process is safe and effective to immobilize the heavy metals in the stainless steel plant dust.Implications: Stainless steel plant dust is considered as a hazardous material, and it can be potentially recycled for black pigment preparation in the ceramic industry. This paper provides the characteristics of the ceramic tiles with black pigment through recycling stainless steel plant dust, and the long-term leaching behavior and controlling leaching mechanisms of heavy metals from the ceramic tile. The effectiveness of the treatment process is also evaluated. PAPER HISTORY

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“…Porous clay composite which is used as a filtration medium had permeability on the order of ~10 -17 m 2 up to ~10 -15 m 2 and could be used as water purification. However, these materials were obtained by the heating process at high temperatures T=900 C-1200 C [3]. Meanwhile, the composite porous with the heating process at a lower temperature T=650 C-750 C could be obtained from waste glass.…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 can be effective as a catalyst in the photocatalyst process when obtaining solar irradiation or UV light directly. A high density of TiO 2 about of 4.32 g/cm 3 , causes TiO 2 must to have a modifications by immobilization of TiO 2 particles on a low density and transparent polymer [7,8]. This modification have to do so that TiO 2 particles can float above the water surface and receive solar irradiation or UV light directly.…”

Section: Introductionmentioning

confidence: 99%

“…Because it has abundant hydrocarbon chains and can be easily damaged caused by heating, frying oil or waste frying oil is very easily synthesized become C-Dots. C-Dot have a low density about of 0.93 g/cm 3 and lower than water, C-Dots from waste frying oil can float on the water so that it can receive solar irradiation directly. In the present work, we report on the use of C-Dots from waste frying oil as photocatalyst for water purification under solar light irradiation.…”

Section: Introductionmentioning

confidence: 99%

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Performance of photocatalyst based carbon nanodots from waste frying oil in water purification

Aji¹,

Wiguna²,

Susanto³

et al. 2016

AIP Conference Proceedings

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Abstract. Carbon Nanodots (C-Dots) from waste frying oil could be used as a photocatalyst in water purification with solar light irradiation. Performance of C-Dots as a photocatalyst was tested in the process of water purification with a given synthetic sewage methylene blue. The tested was also conducted by comparing the performance C-Dots made from frying oil, waste fryng oil as a photocatalyst and solution of methylene blue without photocatalyst C-Dots. Performance of C-Dots from waste frying oil were estimated by the results of absorbance spectrum. The results of measurement absorbance spectrum from the process of water purification with photocatalyst C-Dots showed that the highest intensity at a wavelength 664 nm of methylene blue decreased. The test results showed that the performance of photocatalyst CDots from waste frying oil was better in water purification. This estimated that number of particles C-dots is more in waste frying oil because have experieced repeated the heating process so that the higher particles concentration make the photocatalyst process more effective. The observation of the performance C-Dots from waste frying oil as a photocatalyst in the water purification processes become important invention for solving the problems of waste and water purification.

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Influence of firing temperature on the ceramic properties of Triassic clays from Tunisia

Cited by 127 publications

References 8 publications

Resíduo de quartzito - matéria-prima alternativa para uso em massas de cerâmica estrutural

Resíduo de quartzito - matéria-prima alternativa para uso em massas de cerâmica estrutural

Ceramic tiles with black pigment made from stainless steel plant dust: Physical properties and long-term leaching behavior of heavy metals

Performance of photocatalyst based carbon nanodots from waste frying oil in water purification

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