High chemical stability of stoneware tiles containing waste metals

Reinosa, J.J.; Silva, A.C.; Rubio-Marcos, Fernando; Mello-Castanho, Sonia Regina Homem de; Moya, José S.; Fernández, J.F.

doi:10.1016/j.jeurceramsoc.2010.02.017

Cited by 26 publications

(16 citation statements)

References 31 publications

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“…Ceramic products, such as bricks, stoneware or tiles, have a very heterogeneous composition since they are formed by clay materials which have a wide range of compositions (Couto et al, 2003). According to Reinosa et al (2010), the building industry is the most suitable technological activity sector to consume solid wastes. The reason for this is the large quantity of raw materials used by the sector as well as the large volume of final products required.…”

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confidence: 99%

Valorization and inertization of galvanic sludge waste in clay bricks

Pérez‐Villarejo

Martínez‐Martínez

Carrasco-Hurtado

et al. 2015

Applied Clay Science

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Galvanic sludge wastes (GSW) are produced by the physico-chemical treatments of wastewater generated by electroplating plants. These materials have a significant potential for the production of clay ceramic bricks. This paper focuses on the viability of the inertization of heavy metals from GSW mixed with clays. The original materials *Revised manuscript with no changes marked Click here to view linked References were obtained by mixing three types of raw clay (red, yellow and black) in equal parts with GSW. These mixtures were characterized by XRD, XRF, and chemical elemental analysis CHNS. The dosage of GSW in the Clay-GSW bricks was up to 5 wt%. The bricks were then manufactured using conventional processes. The influence of the amount of GSW was evaluated after firing the clay-GSW composites at 950ºC for 1 hour. The engineering properties of the fired samples, such as density, water absorption, open porosity, water suction and compressive strength, with and without the GSW, were determined. The incorporation of GSW into the clay mix clearly decreased the linear shrinkage and bulk density of the bricks in comparison with the fired clay used as a control. These GSW-clay composites also showed lower open porosity. According to the results obtained for the bulk density of the bricks, samples with GSW addition showed slightly lower values of open porosity than clay bodies, indicating that the GSW-clay samples had slightly higher closed porosity values. This was also shown by SEM. The open porosity, SEM and pore size distribution tests indicated that the porosity generated by the addition of GSW was mainly closed and, therefore, GSW bricks had excellent mechanical properties. The environmental risks of the incorporation of GSW, rich in heavy metals (Cr, Zn, Ni and others), to a clay matrix was evaluated by leaching tests of the fired products. The results indicated a successful inertization of the pollutants.

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confidence: 99%

Valorization and inertization of galvanic sludge waste in clay bricks

Pérez‐Villarejo

Martínez‐Martínez

Carrasco-Hurtado

et al. 2015

Applied Clay Science

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“…The beneficial use of waste materials for ceramic sintering processes is a sustainable way of reducing the waste problem and it provides the new raw materials for the industry at the same time. Sintering clays with metal-bearing sludge has been employed to treat waste materials and to generate new bricks and tiles (Wiebusch & Seyfried, 1997;Reinosa et al, 2010;Zhang et al, 2007). By aiming at industrial application, such ceramic products were sometimes proven to be with even better mechanical performance than traditional bricks and tiles, in terms of properties such as hardness, transverse rupture strength, abrasion and erosion (Vieira et al, 1999).…”

Section: Wwwintechopencommentioning

confidence: 99%

Metal Stabilization Mechanisms in Recycling Metal-Bearing Waste Materials for Ceramic Products

Shih¹,

Lü²

2011

Advances in Ceramics - Electric and Magnetic Ceramics, Bioceramics, Ceramics and Environment

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“…Reinosa et al [6] produced a stoneware tiles by the incorporation of galvanic waste to industrial tile compositions. The tiles are processed from kaolinitic clay, feldspar, quartz and recycled domestic glass.…”

Section: Introductionmentioning

confidence: 99%