Recycling of spent adsorbents for oxyanions and heavy metal ions in the production of ceramics

Verbinnen, Bram; Block, Chantal; Caneghem, Jo Van; Vandecasteele, Carlo

doi:10.1016/j.wasman.2015.07.006

Cited by 72 publications

(21 citation statements)

References 25 publications

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“…Much effort has been recently invested to modify the LWAs’ structure using a variety of materials including different fly ashes, glass, sewage or industrial sludges, mining residues, polishing residues, used sorbents and/or contaminated soils [3,4,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]. Some of these materials may contribute to the foaming or bloating of LWAs during sintering, thus increasing their porosity [28].…”

Section: Introductionmentioning

confidence: 99%

Modification of Lightweight Aggregates’ Microstructure by Used Motor Oil Addition

et al. 2016

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An admixture of lightweight aggregate substrates (beidellitic clay containing 10 wt % of natural clinoptilolite or Na-P1 zeolite) with used motor oil (1 wt %–8 wt %) caused marked changes in the aggregates’ microstructure, measured by a combination of mercury porosimetry (MIP), microtomography (MT), and scanning electron microscopy. Maximum porosity was produced at low (1%–2%) oil concentrations and it dropped at higher concentrations, opposite to the aggregates’ bulk density. Average pore radii, measured by MIP, decreased with an increasing oil concentration, whereas larger (MT) pore sizes tended to increase. Fractal dimension, derived from MIP data, changed similarly to the MIP pore radius, while that derived from MT remained unaltered. Solid phase density, measured by helium pycnometry, initially dropped slightly and then increased with the amount of oil added, which was most probably connected to changes in the formation of extremely small closed pores that were not available for He atoms.

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Section: Introductionmentioning

confidence: 99%

Modification of Lightweight Aggregates’ Microstructure by Used Motor Oil Addition

et al. 2016

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“…Segundo Fencker et al (2015) a preocupação com o meio ambiente surge a partir do momento que o homem percebe que a exploração dos recursos naturais passa a ser maior do que a capacidade natural de regeneração e a geração de resíduos maior do que a natureza consegue absorver. Consequentemente a isso, as décadas posteriores foram marcadas pelo aumento da preocupação humana com o meio ambiente, podendo ser divididas em três fases: (i) preocupação com a poluição -décadas de 1970 e 1980, (ii) preocupação com a biodiversidadedécada de 1990, e (iii) preocupação com as mudanças climáticas e aquecimento global -século XXI (VERBINNEN et al, 2015).…”

Section: A Consciência Ambiental E As Convenções Mundiaisunclassified

Certificações ambientais: contribuição à sustentabilidade na construção civil no Brasil

Conto¹,

Oliveira²,

Ruppenthal³

2017

GEPROS

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O crescimento das atividades industriais contribuiu para o surgimento de debates, teorias e estudos sobre os riscos ambientais e sua relação com a indústria. Nesse âmbito, a construção civil como geradora de grandes impactos ambientais, tem sido foco de estudos em importantes eventos e convecções mundiais. Para tanto, cresce a adesão e desenvolvimento de selos e certificações ambientais como meio de mitigar ações e impactos da cadeia produtiva da construção civil. Nesse aspecto, a metodologia utilizada para o desenvolvimento desse trabalho foi a pesquisa documental. Como resultados, o estudo constata as principais certificações e selos utilizados no Brasil e sua crescente adesão. Palavras-chave: Construção Civil. Certificações e selos ambientais. Sustentabilidade. The growth of industrial activities contributed to the emergence of debates, theories and studies on the environmental risks and their relationship with industry. In this context, the construction industry, as a generator of large environmental impacts, has been the focus of studies on important events and global conventions. Therefore, the development of seals and environmental certifications as a means of mitigating the impacts of the construction production chain has been growing. The methodology used for the development of this work was documentary research. As a result, the study examined the main certifications and seals used in Brazil and their accession in the country.

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“…However, the costly nature of the material has somehow limited its use [22]. Consequently, the search for the low cost adsorbents has continued [23][24][25][26]. The use of waste products in developing low cost adsorbents has also contributed to minimization of waste production and recovery of waste materials [27].…”

Section: Introductionmentioning

confidence: 99%

Removal of COD and Ammonia-Nitrogen by Sawdust/Bentonite Augmented SBR Process

Mohajeri¹,

Selamat²,

Hamidi³

et al. 2018

Preprint

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Water pollutants removal by biomass adsorbent has been considered innovative and cost effective, thus commendable for application in industrial applications. However, certain important aspects have been overlooked by researchers, namely the efficiency in the operation time and pollutant removal. In this research, landfill leachate samples with organic components were treated using bentonite-enriched with sawdust augmented (SBR) process. By modifying the pH, the sawdust samples were categorized into three: the acidic, the alkaline, and the neutral. To bentonite samples, the pH-adjusted sawdust was added at 10%, 20%, and 30% amounts by mass respectively. At the optimum aeration rate of 7.5 L/min and contact period of 22 h, the treatment achieved 99.28% and 95.41% removal of COD and NH3-N with bentonite respectively. For both pollutants, in the presence of sawdust, the removal reduced by about 17% with contact period reduced to 2 h which was a considerable achievement.

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Recycling of spent adsorbents for oxyanions and heavy metal ions in the production of ceramics

Cited by 72 publications

References 25 publications

Modification of Lightweight Aggregates’ Microstructure by Used Motor Oil Addition

Modification of Lightweight Aggregates’ Microstructure by Used Motor Oil Addition

Certificações ambientais: contribuição à sustentabilidade na construção civil no Brasil

Removal of COD and Ammonia-Nitrogen by Sawdust/Bentonite Augmented SBR Process

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