Leaching behaviour of copper slag, construction and demolition waste and crushed rock used in a full-scale road construction

Lidelöw, Sofia; Mácsik, Josef; Carabante, Ivan; Kumpienė, Jūratė

doi:10.1016/j.jenvman.2017.09.032

Cited by 25 publications

(11 citation statements)

References 16 publications

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“…This comparison shows that the content and slag chemistry of smelter-specific slag trace elements can affect their potential use in external applications due to the risk of leaching and spreading elements, such as Zn, into the surrounding environment [19][20][21]. Both Lidelöw et al 2017 andEttler et al 2014 noted that the leaching behavior of fayalite and olivine slags changes over time [22,23]. The former showed that the leaching of Zn initially increases, peaks after two years, and later decreases over time [22].…”

Section: Introductionmentioning

confidence: 89%

“…Both Lidelöw et al 2017 andEttler et al 2014 noted that the leaching behavior of fayalite and olivine slags changes over time [22,23]. The former showed that the leaching of Zn initially increases, peaks after two years, and later decreases over time [22]. Ettler et al indicated that the leaching of Zn from some olivine slags (Primary Pb slag) increases over time as the fayalite weathers [23].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (FeXZn(1−X))2SiO4 System

et al. 2022

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The zinc in the fayalite slag of copper smelters, in which Zn-containing raw materials are used, is mainly found to be in oxidic phases, such as glassy iron silicate. During the slag water granulation process, the molten slag is heated, whereby the granulated slag achieves varying granulation temperatures. Therefore, in this study, we aimed to characterize and assess the leaching behavior of a synthesized Fe-saturated (FeX,Zn(1−X))2SiO4 system to understand the dependance of the zinc leaching behavior on the parameters of the ZnO content (1–10 wt.%) and granulation temperature (1300 or 1400 °C). It was found that the Zn leaching increased with the increasing Zn content and granulation temperature, using both batch and static pH leaching methods. Zn leaching was further increased at pH 5 using diluted nitric acid under oxidation conditions. Among the oxides in the samples—fayalite, spinel, and glass—glass was found to contribute to Zn leaching, owing to its weathering during pH-titration.

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (FeXZn(1−X))2SiO4 System

et al. 2022

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“…Um primeiro ponto que deve ser analisado para utilização dos RCD é a chance de existirem resíduos químicos nos mesmos, podendo contaminar o solo, a vegetação próxima e até mesmo os lençóis freáticos (Lidelöw et al, 2017). Por isso, vários autores realizaram estudos, tanto em campo quanto em laboratório, para aferir o grau de contaminação que pode ocorrer no meio ambiente e assim verificar a possibilidade de utilização do RCD de modo seguro em bases e sub-bases de estradas.…”

Section: Processo De Lixiviação Dos Rcdunclassified

“…Pode-se dizer que, leva um período entre dois à quatro anos, para que o material seja livre de contaminantes, dependendo a origem desse resíduo, mas que nesse caso, com um período de descanso, foi passível de destinação adequada. Porém, não deve ser ignorado o fato de a brita, um material natural comumente utilizado em vias e estradas, não é totalmente isento de contaminantes (Lidelöw et al, 2017).…”

Section: Processo De Lixiviação Dos Rcdunclassified

Resíduos de construção e demolição: uma revisão dos usos e aplicabilidades em estradas e rodovias (2015 – 2020)

Melo

Neto

Bernardo

2021

RSD

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A compreensão sobre o estado da arte em relação a aplicação de resíduos de construção e demolição (RCD) objetiva verificar o conhecimento já produzido sobre o assunto. A temática tem ganhado importância dada sua grande representatividade entre os resíduos sólidos urbanos (RSU), contribuindo para poluição do meio ambiente, ao passo que se aproximam de 50% da constituição de todo RSU em grandes cidades brasileiras e também podem chegar a este valor em cidades de todo o mundo. Desse modo, é indispensável conhecer os diversos métodos existentes de utilização dos RCD a fim de beneficiar o meio ambiente, bem como a economia e a sociedade - os três pilares do desenvolvimento sustentável. Para tanto, foi desenvolvida uma revisão sistemática de literatura (RSL) em duas bases de dados, Web of Science e Science Direct. Delimitou como período de publicação e tipos de documentos, os artigos publicados entre os anos de 2015 e 2020. Como resultado, obteve-se cinco diferentes tipos de assuntos abordando o RCD, iniciando com um panorama geral dos Resíduos de Construção e Demolição até as possibilidades de reuso para os variados tipos de RCD produzidos nas cidades mundiais.

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“…The use of alternative materials in road construction provides several economic and ecological advantages. When waste materials with acceptable properties are available, it is possible to avoid the costs related to the extraction, and to minimize the transport distance, energy consumption and consequently the greenhouse gas emissions [3].…”

Section: Introductionmentioning

confidence: 99%

Valorization of Phosphate Mine Waste Rocks as Materials for Road Construction

et al. 2019

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The road construction sector is a worldwide high consumer of natural aggregates. The use of unusual industrial by-products in road techniques can contribute to the conservation of non-renewable natural resources and the reduction of wastes produced by some industries. Phosphate waste rocks could be considered as potential alternative secondary raw materials in road construction. The use and valorization of these wastes is currently limited according to the Moroccan guide for road earthworks (GMTR). The guide has classified these materials as waste products, which consequently, cannot be used in road construction. However, phosphate waste rocks are sedimentary natural rocks which have not been subjected to any transformation other than mechanical fragmentation. The goal of this paper is to discuss key-properties of various phosphate mine waste rocks (PMWR) to be used as road materials. Samples were taken from different stockpiles in the phosphate mine site of Gantour in Morocco. The different waste rocks samples were characterized in terms of their physical, geotechnical, chemical, mineralogical and environmental properties using international testing norms. The obtained results showed that the studied PMWR presented satisfying characteristics; the specific (particle) density: ρs > 26 kN/m3, Los Angeles abrasion: 45% < LA < 58%), methylene blue value MBV < 1 g/100g, organic matter: OM < 1% and plasticity index: PI < 20%. All PMWR were confirmed as possessing the requested geotechnical properties to be used as materials for embankments. Moreover, leaching tests showed that none of them released any contaminants. In field application, these materials have been also successfully used in in situ experimental pilot testing. Therefore, the PMWR have to be classified in the category of natural aggregates that are similar to conventional materials.

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Leaching behaviour of copper slag, construction and demolition waste and crushed rock used in a full-scale road construction

Cited by 25 publications

References 16 publications

The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (FeXZn(1−X))2SiO4 System

The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (FeXZn(1−X))2SiO4 System

Resíduos de construção e demolição: uma revisão dos usos e aplicabilidades em estradas e rodovias (2015 – 2020)

Valorization of Phosphate Mine Waste Rocks as Materials for Road Construction

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