Quantitative evaluation and leaching behavior of cobalt immobilized in sulfur polymer concrete composites based on lignite fly ash, slag and phosphogypsum

Szajerski, Piotr; Bogobowicz, Agnieszka; Bem, H.; Gasiorowski, Andrzej

doi:10.1016/j.jclepro.2019.03.010

Cited by 33 publications

(21 citation statements)

References 49 publications

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“…Understanding the risks of heavy metals leaching from PG stacks during its life cycle is necessary, as highlighted in the present work. Further integrated management plan includes the potential application in construction materials such as plaster [16], concrete and construction demolition waste [62], polymer concrete [63]. PG can be used as a road base material, a developed approach to massively recycle PG for industrial application.…”

Section: Management Approachmentioning

confidence: 99%

Tunisian phosphogypsum tailings: Assessment of leaching behavior for an integrated management approach

Zmemla

Sdiri

Naifar

et al. 2019

Environmental Engineering Research

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This study has been carried out to evaluate the leaching behavior of Tunisian phosphogypsum (PG) tailings in Skhira city (southern Tunisia). Two PG samples, including old and freshly deposited samples, were characterized in terms of physical, geotechnical, mechanical, chemical and mineralogical properties. Special attention was paid to their leaching behavior when subjected to standard leaching tests. Our results indicated that both samples are mainly composed of more than 31.85% CaO and 31.4% SO3, indicating the predominance of gypsum. This was further confirmed by XRD patterns that revealed the presence of characteristic reflections of gypsum, brushite, quartz and Maladrite. Compressive strength after 90 d exceeded 769 kPa, but still lower than that of natural sand (1,800 kPa). Leaching test was proposed as an appropriate method to determine the released contaminants from PG. The obtained results showed that Fluorine and Phosphorus are the most released elements from PG with 40 and 30%, respectively. The released Se, Cd, and Zn were the only trace elements that exceeded the threshold limits. It seemed that leached element concentrations were independent aging or particle size of the PG. Based on the assessment of leaching behavior, an integrated management approach of the PG deposits was proposed.

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Section: Management Approachmentioning

confidence: 99%

Tunisian phosphogypsum tailings: Assessment of leaching behavior for an integrated management approach

Zmemla

Sdiri

Naifar

et al. 2019

Environmental Engineering Research

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“…The deformative properties of sulfur-based concrete are taken into account when determining crack resistance and structural rigidity. Deformative characteristics of sulfur-based concrete are given in Table 8 [ 3 , 8 , 11 , 125 ]. Some problems arise due to low-temperature creep, which, depending on the formulations and conditions of use of products, may be lower or higher than the creep of ordinary concrete [ 5 ].…”

Section: Sulfur In the Concrete Industrymentioning

confidence: 99%

“…One of the promising ways to utilize sulfur is in construction as a constituent of sulfur-based concrete. Advantages of sulfur-based concrete as compared to Portland cement concrete are; rapid curing [ 3 ], waste management [ 4 ], possibility of recycling [ 5 ], high resistance to acids and radiation [ 6 ], possibility of concreting at negative ambient temperatures [ 7 ], quick setting time [ 8 ], low electrical and thermal conductivity [ 9 ], water tightness [ 10 ], high frost resistance [ 11 ] and high wear resistance [ 12 ] as shown in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

A Critical Review on the Properties and Applications of Sulfur-Based Concrete

et al. 2020

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The incessant demand for concrete is predicted to increase due to the fast construction developments worldwide. This demand requires a huge volume of cement production that could cause an ecological issue such as increasing the rates of CO2 emissions in the atmosphere. This motivated several scholars to search for various alternatives for cement and one of such alternatives is called sulfur-based concrete. This concrete composite contributes to reduce the amount of cement required to make conventional concrete. Sulfur can be used as a partial-alternate binder to Ordinary Portland Cement (OPC) to produce sulfur-based concrete, which is a composite matrix of construction materials collected mostly from aggregates and sulfur. Sulfur modified concrete outperforms conventional concrete in terms of rapid gain of early strength, low shrinkage, low thermal conductivity, high durability resistance and excellent adhesion. On the basis of mentioned superior characteristics of sulfur-based concrete, it can be applied as a leading construction material for underground utility systems, dams and offshore structures. Therefore, this study reviews the sources, emissions from construction enterprises and compositions of sulfur; describes the production techniques and properties of sulfur; and highlights related literature to generate comprehensive insights into the potential applications of sulfur-based concrete in the construction industry today.

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“…All gamma-ray spectra were collected during 80,000 s inside the 5-cm-thick wall lead shield lined with the 5 mm steel cylinder inside sample chamber. Details of the experimental system are described elsewhere (Bem et al 2002;Szajerski et al 2019aSzajerski et al , 2019bSzajerski et al , 2020. The collected spectra were analyzed using Geenie2000 software.…”

Section: Radionuclides Determinationmentioning

confidence: 99%

Distribution of uranium and thorium chains radionuclides in different fractions of phosphogypsum grains

Szajerski

2020

Environ Sci Pollut Res

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This work presents results obtained using gamma spectrometry measurements of phosphogypsum samples on a non-fractionated (native) and fractionated phosphogypsum byproduct. The phosphogypsum was divided into particles size fractions within the range of < 0.063, 0.063-0.090, 0.090-0.125, 0.125-0.250, and over 0.250 mm and analyzed after reaching radioactive equilibrium using high-resolution gamma spectrometry technique. It was found that there is no significant differentiation between 226 Ra distribution among particular grain size fractions of this material; however, tendency for preferential retention of radionuclides in particular grain size fractions is observed. The detailed analysis of results revealed that radium is preferentially retained in smaller grain size fractions, whereas lead and thorium in coarse fractions. The results indicate that overall 226 Ra activity concentrations between particular fractions of phosphogypsum vary globally between − 34 and + 47% regarding non-fractionated material, and for 210 Pb activity concentration, fluctuations are found between − 26 up and + 38%. Presumably, the mechanism of radium incorporation into gypsum phase is based on a sequence of radium bearing sulfate phases formation followed by a surface adsorption of these phases on the calcium sulfate crystals, whereas for lead and thorium ions, rather incorporation into crystal lattice should be expected as more likelihood process.

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Quantitative evaluation and leaching behavior of cobalt immobilized in sulfur polymer concrete composites based on lignite fly ash, slag and phosphogypsum

Cited by 33 publications

References 49 publications

Tunisian phosphogypsum tailings: Assessment of leaching behavior for an integrated management approach

Tunisian phosphogypsum tailings: Assessment of leaching behavior for an integrated management approach

A Critical Review on the Properties and Applications of Sulfur-Based Concrete

Distribution of uranium and thorium chains radionuclides in different fractions of phosphogypsum grains

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