Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

Gruszecka‐Kosowska, Agnieszka; Baran, Paweł; Wdowin, Magdalena; Franus, Wojciech

doi:10.1007/s12665-017-6854-8

Cited by 47 publications

(10 citation statements)

References 30 publications

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“…The SEM images obtained on raw dolomite (Figure 2, image A) show a high heterogeneity of particle sizes with variations from 1,512 µm to 14.08 µm. According to the literature, generally in raw dolomite, two types of aggregates can be observed: fine with dimensions between 1-4 µm and large with dimensions between 5-14 µm (Gruszecka-Kosowska et al, 2017;Huang et al, 2019). Moreover, the shape of the particles in dolomite is not well defined (irregular) and the aggregates have a smooth surface, without visible pores.…”

Section: Sem-eds Analysis Of Raw and Modified Dolomite Powdersmentioning

confidence: 99%

Dolomite surface modification with titanium and silicon precursors and its morphostructural and thermal characterisation

Sönmez¹,

Juganaru²,

Ficai³

et al. 2020

Proceedings of the 8th International Conference on Advanced Materials and Systems

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The aim of the paper is to modify the surface of dolomite with titania (TiO2) and silica (SiO2) precursors, in order to use it as a potential reinforcement material in a polymeric matrix or for environmental applications (photocatalyst for the degradation of organic pollutants based on TiO2). The dolomite surface modification was performed by 2 methods. The first method consisted in modifying the direct dolomite surface with SiO2 and TiO2. The second method consisted in the initial treatment of dolomite with TEOS, in order to form silanol bonds, followed by the addition of SiO2 and TiO2 precursors. The obtained powders were characterized by FTIR, SEM-EDS and DSC-TG. The FTIR spectra prove the formation of the silica network while the samples modified with PDMS exhibit the characteristic peaks of methyl groups from PDMS. In EDS, the presence of the characteristic elements of dolomite (calcium, magnesium, oxygen and carbon) can be observed. When analyzing the modified dolomite powders the presence of titanium and silicon can be observed. The characteristic morphology of the dolomite is preserved in all the samples but, the surface of the larger particles is decorated with smaller particles proving the functionalization of the dolomite, according to the two routes. The thermal analysis is characteristic for dolomite-based materials, the main difference between the samples appearing as a consequence of the burning of the organic part of PDMS, which occur between 400 and 600°C.

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Section: Sem-eds Analysis Of Raw and Modified Dolomite Powdersmentioning

confidence: 99%

Dolomite surface modification with titanium and silicon precursors and its morphostructural and thermal characterisation

Sönmez¹,

Juganaru²,

Ficai³

et al. 2020

Proceedings of the 8th International Conference on Advanced Materials and Systems

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“…Activated carbon and ion-exchange resins are commonly used to remove pollutants but they are expensive materials, therefore the elimination of pollutants from water has been focusing recently in the research of low-cost alternatives, such as forestry wastes, agricultural residues, marine materials, accessible minerals, or waste minerals. Waste minerals from construction work such as dolomite (cadmium sorption of 89.9 mg/g) are inexpensive adsorbents and they do not have any other practical application [6]. In the same way, synthetic mineral adsorbents made from waste material such as zeolite synthetized from fly ash product of power generation by coal (copper sorption of 4.99 mg/g) is another example of a raw material without additional applications [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

2019

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The use of heavy metals in technological applications has led to detrimental effects on human health and the environment. Activated carbon and ion-exchange resins are commonly used to remove pollutants but they are expensive. Therefore, the research of low-cost alternatives derived from natural resources and organic wastes is being considered. The aim of this study considers the use of Calcium Alginate/Spent Coffee Grounds (CA-SCGs) composite beads to adsorb heavy metals from aqueous solutions, particularly, the removal of Ni 2+ or Cd 2+ at concentrations from 10 ppm to 100 ppm. CA-SCGs beads were made of equal proportions of alginate and spent coffee grounds and compared with calcium alginate beads (CA beads) and spent coffee grounds (SCGs) in terms of capacity and rate of adsorption. Three cycles of adsorption/desorption were done. The beads were characterized by Scanning Electron Microscopy coupled with an energy-dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, and point of zero charge. Langmuir, Freundlich, and Sips models, and a pseudo-second-order kinetic equation were used. Sips model showed the best correlation with the adsorption of CA-SCGs beads with capacities of adsorption of 91.18 mg/g for cadmium and 20.96 mg/g for nickel. CA-SCGs beads had a greater adsorption than the CA beads, achieving adsorption percentages close to 100% than alginate alone, showing their effectiveness in heavy metal removal.

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“…The pH value was surprisingly found as not governing the adsorption of metals on APCR and FGDR samples (Fig. 4), while other studies show dependence of adsorption on pH (e.g., Yan et al 2015;Mikoda et al 2017;Gruszecka-Kosowska et al 2017).…”

Section: Effect Of Phmentioning

confidence: 77%

Air pollution control and flue gas desulfurization residues from Polish copper smelting facility as adsorbents of Pb(II) and Cu(II) from aqueous solutions

Mikoda

Gruszecka‐Kosowska

Klimek

et al. 2018

Environ Sci Pollut Res

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This study aimed at evaluation of air pollution control residues (APCR) and flue gas desulfurization residues (FGDR) from copper foundry in Southwestern Poland as adsorbents of Cu(II) and Pb(II) from simulated wastewater. Studies of the impact of pH and adsorbent dose, as well as sorption isotherms, and kinetic and thermodynamic studies were conducted in a series of batch experiments. The maximum adsorption capacities were equal to 42.9 mg g Cu(II) and 124.4 mg g Pb(II) for APCR and 98.8 mg g Cu(II) and 124.7 mg g Pb(II) for FGDR, which was comparable to mineral adsorbents examined in other studies. Adsorption isotherms followed the Langmuir model, except for Pb(II) for FGDR, which followed Freundlich model. Sorption kinetics for both materials was properly expressed by pseudo-second-order equation. Mean adsorption energy parameter suggested that the adsorption might have occurred via physical bonding. Thermodynamic study revealed that adsorption was spontaneous and endothermic for Cu(II) and not spontaneous and exothermic for Pb(II), with lower temperature favoring the process. The results suggested that both materials had high affinity towards Cu(II) and Pb(II) ions and could be conducted industrial scale research for consideration as potential adsorbents from aqueous solutions.

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Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

Cited by 47 publications

References 30 publications

Dolomite surface modification with titanium and silicon precursors and its morphostructural and thermal characterisation

Dolomite surface modification with titanium and silicon precursors and its morphostructural and thermal characterisation

Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

Air pollution control and flue gas desulfurization residues from Polish copper smelting facility as adsorbents of Pb(II) and Cu(II) from aqueous solutions

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