Heavy metal chemical fractionation and immobilization in lightweight aggregates produced from mining and industrial waste

Corrochano, B. González; Alonso-Azcárate, Jacinto; González, M.

doi:10.1007/bf03326251

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…A significant number of studies with sludge and industrial waste have used the thermal stabilization process to produce composites LWA, immobilizing the contaminants e.g. heavy metals through the sintering process in the matrix of the new materials, and thus reducing the migration of contaminants into the environment (Huang et al, 2007;Wang et al, 2008;Corrochano et al, 2011;González-Corrochano et al, 2017). Huang et al (2005) used the aluminum-based sludge from a Taiwanese WTP to produce lightweight concrete coarse aggregates.…”

Section: Lightweight Aggregatesmentioning

confidence: 99%

Progress in manufacture and properties of construction materials incorporating water treatment sludge: A review

Gomes

Zhou

et al. 2019

Resources, Conservation and Recycling

175

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Water treatment sludge (WTS) management is a growing global problem for water treatment plants (WTPs) and governments. Considering the scarcity of raw materials in many parts of the planet and unique properties of WTS, extensive research has been conducted on the application of WTS in the production of construction materials such as roof tiles, bricks, lightweight aggregates, cement, concrete and geopolymers. This paper critically reviews the progress in the application of WTS in construction materials, by synthesizing results from recent studies.Research findings have revealed that incorporation of ≤ 10% alum-based sludge in ceramic bricks is satisfactory with a small reduction of mechanical performance. Using the iron-based sludge, the bricks presented better mechanical strength than the reference clay-bricks.Concerning WTS application in concrete, 5% replacement of cement or sand by WTS was considered as the ideal value for the application in a variety of structural and non-structural concrete without adverse effect on concrete mechanical performance. Furthermore, this paper discusses sludge-amended concrete in terms of durability, potential leaching of toxic elements and cost, and suggests topics for future research on the sustainable management of WTS.

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Section: Lightweight Aggregatesmentioning

confidence: 99%

Progress in manufacture and properties of construction materials incorporating water treatment sludge: A review

Gomes

Zhou

et al. 2019

Resources, Conservation and Recycling

175

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“…Among these thermal treatment methods, we have chosen to recover phosphate waste into light aggregates. Indeed, the light aggregates have many applications, among which we can mention: the production of light concretes, geotechnical backfill, insulation products, soils, hydroculture, drainage, roof-gardens, recycling of hazardous waste and filters [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Formulation and Characterization of Light Aggregates from Phosphate Ore Processing Waste from the Hahotoe and Kpogame Mines, Potential Use for Agricultural Applications

Koriko¹,

Zounon²,

Bafai³

et al. 2021

AJAC

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This study relates to the development of light aggregates from phosphate sludge, rejects to sieves and clays. Three types of aggregates denoted S9, S10 and S11 have been developed. Samples S9 are composed of clay, screenings and phosphate sludge, samples S10 of clay and screenings and samples S11 of clay and phosphate sludge. The influence of temperature and cooking time on the properties (water absorption, density, porosity, etc.) of the aggregates produced was studied, as well as their mineralogical composition. For this purpose, three different cooking temperatures 900°C, 950°C and 1000°C, and two cooking times 30 and 60 min were considered. This study showed that the water absorption of aggregates cooked for 30 min varies between 12.71% and 14.93% while that of aggregates cooked for 60 min varies between 12.78% and 15.16%. The lowest water absorption is observed at the S10 aggregates sintered at 900°C for 30 min while the highest water absorption is observed at the S9 aggregates sintered at 900°C for 60 min. The dry density of aggregates cooked for 30 min varies between 1.27 and 1.68 g/cm 3 while that of aggregates cooked for 60 min varies between 1.75 and 2.13 g/cm 3 . With the exception of S11 aggregates baked at 950 and 1000°C for 60 min, which have their density greater than 2 g/cm 3 , all the others can be considered light aggregates. It should also be noted that the aggregates cooked for 30 min have a lower density than the aggregates cooked for 60 min. The porosity of the aggregates cooked for 30 min varies between 16.30 and 20%, on the other hand the aggregates cooked for 60 min varies between 19.06 and 23.64%. X-ray diffraction analysis of the aggregates shows that they are mainly composed of fluoroapatite, quartz, hematite and plagioclases (albite, labradorite, and anorthite). The study also showed that the amount of quartz and fluoroapatite decrease with temperature. On the basis of the physical and mineralogical analysis carried out on the light aggregates, we could find them suitable for agricultural applications, especially their uses as substrates in hydroponics, in greenhouse cultivation in general, and in gardening.

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“…Another kind of advantage is possibility of using waste materials in the production of lightweight aggregates [13,14] and even recycling hazardous waste which are difficult to dispose of in any other way, such as petroleum soaked absorbents [15] or a waste containing heavy metals [16].…”

Section: Introductionmentioning

confidence: 99%

Comparative Investigations of some Properties of Lightweight Cement Concretes Containing Siliceous Fly Ash

Kubissa

2016

KEM

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In the article the possibility of lightweight cement concrete manufacturing has been presented with use of binder in which part of cement was replaced with siliceous fly ash Class F. It was used lightweight aggregate Pollytag and Keramzyt. Total amount of binder was 400 kg/m3 with w/b=0.5. Mechanical properties has been tested as well as properties affecting durability of concrete. Replacing part of cement with fly ash improved concrete resistance on chloride ion migration, reduced compressive and tensile strength of concrete and increased carbonation depth.

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Heavy metal chemical fractionation and immobilization in lightweight aggregates produced from mining and industrial waste

Cited by 12 publications

References 23 publications

Progress in manufacture and properties of construction materials incorporating water treatment sludge: A review

Progress in manufacture and properties of construction materials incorporating water treatment sludge: A review

Formulation and Characterization of Light Aggregates from Phosphate Ore Processing Waste from the Hahotoe and Kpogame Mines, Potential Use for Agricultural Applications

Comparative Investigations of some Properties of Lightweight Cement Concretes Containing Siliceous Fly Ash

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