Technological and environmental comparative of the processing of primary sludge waste from paper industry for mortar

Azevedo, Afonso Rangel Garcez de; Alexandre, Jonas; Marvila, Markssuel Teixeira; Xavier, Gustavo de Castro; Monteiro, Sérgio Neves; Pedroti, Leonardo Gonçalves

doi:10.1016/j.jclepro.2019.119336

Cited by 97 publications

(36 citation statements)

References 49 publications

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“…The landfills can generate at large high economic and environmental costs (such as scarcity of disposal area and raw materials, and potential leaching of hazardous liquids in waters). [6][7][8][9] Thus, many industries have been concerned with the issues of solid waste generated by them, investing in research and methodologies that enable the reinsertion of these materials in another production chain. 10 One important economic segment that is closely linked to the reuse of industrial solid waste is the industries that produce civil construction materials, such as the production of red ceramics and cementitious ceramics, which are applied in different stages of a building.…”

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confidence: 99%

Circular economy in cementitious ceramics: Replacement of hydrated lime with a stoichiometric balanced combination of clay and marble waste

Marvila¹,

Azevedo

Alexandre³

et al. 2020

Int J Applied Ceramic Tech

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Cementitious ceramics, produced from the hydration of cement and hydrated lime, are responsible for a great deal of damage to the environment due to the high emission of CO 2 that occurs in the production of cement and lime. Therefore, the objective of this work was to substitute the hydrated lime with a combination of clay residue and marble waste extracted from ceramic and ornamental rock producing industries, respectively, which constitutes a circular economy for the ceramic industry related to masonry applications. Ceramics were produced in the proportion 1:1:6:1.5 (cement:lime:sand:water), through the molding procedure, and were studied by replacing hydrated lime with 100% clay residue and 100% marble residue, in addition to stoichiometric calculated parts of marble to clay. The molar ratios used were 1:1, 1:2, and 2:1 (marble:clay). Tests of consistency, incorporated air content, water retention, compression strength, density, water absorption by capillarity, adhesion, and electrical resistivity were performed. The results obtained demonstrate that the use of residue of marble and clay together, as long as they are correctly balanced, provides a high gain in technological properties, enabling the circular economy of cementitious ceramics, mainly for the composition 1 marble:1clay, which presented the best properties, both in the fresh and hardened state. The economic analysis carried out proved the financial gains for the industrial sectors involved (civil construction, ornamental rock, and ceramic).

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confidence: 99%

Circular economy in cementitious ceramics: Replacement of hydrated lime with a stoichiometric balanced combination of clay and marble waste

Marvila¹,

Azevedo

Alexandre³

et al. 2020

Int J Applied Ceramic Tech

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“…Otherwise, large quantities of waste are produced annually from the pulp and paper industry [20]. The paper and pulp industry in Europe affects the environment in terms of producing about 11 tonnes of waste paper sludge annually [21,22].…”

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confidence: 99%

The impact of grinding time on properties of cement mortar incorporated high volume waste paper sludge ash

Shubbar¹,

Sadique²,

Nasr³

et al. 2020

Karbala International Journal of Modern Science

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“…Nonetheless, extracting the ink, clay, coatings, and chemicals from paper waste to manufacture paper reuse produces a vast quantity of de-inked paper sludges [6]. Other minor outlets are the use as animal bedding, recycling for the production of new waste-based material for building constructions [4], mortar production [7], green composites [8], cyanoethyl cellulose [9], and compost production [10,11]. Even with the suggested waste management application and the relevant literature, the pulp and paper industry continues to be unsuitable with inadequate comprehensive approaches.…”

Section: Introductionmentioning

confidence: 99%

Printed Paper Waste as an Alternative Growing Medium Component to Produce Brassica Seedlings under Nursery Conditions

et al. 2020

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Significant quantities of paper waste (PW) have been accumulated in recent years and the reuse/recycling of PW is required due to environmental concerns. In the present study, printed PW was used as a peat (P) substitute in growing medium for the Brassica seedlings production, considering recycling, sustainable agriculture, and partly peat replacement. Seeds of cauliflower, broccoli, and cabbage were seeded in growing media made of 0–10–30–50% PW. The addition of PW improved the growing media pH and mineral content, reduced the media aeration, and affected seed emergence. The PW decreased plant growth and the effects were more pronounced at 50% PW. The PW ≥ 30% decreased stomatal conductance, while chlorophyll fluorescence and content of chlorophylls decreased with high PW ratio, negatively affecting the plant physiology. The PW decreased plant sodium and iron and increased potassium, calcium, magnesium, and copper content. The PW increased antioxidant activity to a certain degree for cauliflower and cabbage and resulted in no change for broccoli, while polyphenols increased in cabbage seedlings. The addition of PW did not cause cellular damage as both lipid peroxidation and hydrogen peroxide production remained at low levels, maintaining low levels on the antioxidant enzymes (catalase, superoxide dismutase, peroxidase) metabolism. The present study shows that low PW content can partially replace peat for Brassica seedling production under a sustainable agriculture and environmentally friendly scheme.

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Technological and environmental comparative of the processing of primary sludge waste from paper industry for mortar

Cited by 97 publications

References 49 publications

Circular economy in cementitious ceramics: Replacement of hydrated lime with a stoichiometric balanced combination of clay and marble waste

Circular economy in cementitious ceramics: Replacement of hydrated lime with a stoichiometric balanced combination of clay and marble waste

The impact of grinding time on properties of cement mortar incorporated high volume waste paper sludge ash

Printed Paper Waste as an Alternative Growing Medium Component to Produce Brassica Seedlings under Nursery Conditions

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