Preparation of a novel magnetic geopolymer/zero–valent iron composite with remarkable adsorption performance towards aqueous Acid Red 97

Netto, Matias Schadeck; Rossatto, Diovani L.; Jahn, Sérgío Luiz; Mallmann, Evandro Stoffels; Dotto, Guilherme L.; Foletto, Edson Luiz

doi:10.1080/00986445.2019.1635467

Cited by 21 publications

(4 citation statements)

References 52 publications

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“…In the case of dye removal, clay-based geopolymers showed a good performance; however, it was in the same adsorption capacities range of the other existing adsorbent. Nevertheless, the metakaolin-based geopolymer showed exceptional adsorption capacity for Acid Red 97 (1814.0 mg/g) and Acid green (400.00 mg/g) compared to the other sorbents for the literature (Netto et al, 2020 ; Rossatto et al, 2020 ). For pharmaceutical compounds, clay-based geopolymers demonstrated a high uptake capacity towards tetracycline and 5-fluorouracil compounds compared to the other synthesized or activated sorbent materials as presented in Table 4 .…”

Section: Application Of Clays and Geopolymers In Water Treatmentsmentioning

confidence: 91%

“…Moreover, the organically modified metakaolin-based mesoporous geopolymer (GP-CTAB) revealed a high sorption capacity (164.10 mg/g) for Pb(II) ions (Lan et al, 2020 ). In the case of dye removal, the metakaolin-based geopolymer (magnetic/zero-valent iron) showed a superior sorption capacity of 1814.0 mg/g towards Acid Red 97 dye (Netto et al, 2020 ). Also, the metakaolin-based geopolymer (mixed with rice husk ash) has a good sorption capacity of 276.9 mg/g for Methyl violet 10B dye (Barbosa et al, 2018 ).…”

Section: Application Of Clays and Geopolymers In Water Treatmentsmentioning

confidence: 99%

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A comprehensive review on sustainable clay-based geopolymers for wastewater treatment: circular economy and future outlook

Maged

El-Fattah

Kamel

et al. 2023

Environ Monit Assess

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In the present era of significant industrial development, the presence and dispersal of countless water contaminants in water bodies worldwide have rendered them unsuitable for various forms of life. Recently, the awareness of environmental sustainability for wastewater treatment has increased rapidly in quest of meeting the global water demand. Despite numerous conventional adsorbents on deck, exploring low-cost and efficient adsorbents is interesting. Clays and clays-based geopolymers are intensively used as natural, alternative, and promising adsorbents to meet the goals for combating climate change and providing low carbon, heat, and power. In this narrative work, the present review highlights the persistence of some inorganic/organic water pollutants in aquatic bodies. Moreover, it comprehensively summarizes the advancement in the strategies associated with synthesizing clays and their based geopolymers, characterization techniques, and applications in water treatment. Furthermore, the critical challenges, opportunities, and future prospective regarding the circular economy are additionally outlined. This review expounded on the ongoing research studies for leveraging these eco-friendly materials to address water decontamination. The adsorption mechanisms of clays-based geopolymers are successfully presented. Therefore, the present review is believed to deepen insights into wastewater treatment using clays and clays-based geopolymers as a groundbreaking aspect in accord with the waste-to-wealth concept toward broader sustainable development goals.

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Section: Application Of Clays and Geopolymers In Water Treatmentsmentioning

confidence: 91%

Section: Application Of Clays and Geopolymers In Water Treatmentsmentioning

confidence: 99%

A comprehensive review on sustainable clay-based geopolymers for wastewater treatment: circular economy and future outlook

Maged

El-Fattah

Kamel

et al. 2023

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Hybrid or composite materials were proposed to improve the removal efficiency of organic pollutants. Thus, graphene [120,132,133,165], TiO2 [88,98,105], CdS [142], various metal oxides [101,106,135] were introduced in GP matrix in order to enhance degradation abilities of resulting materials.…”

Section: Properties and Performance Of Gps/aams Towards Various Contamentioning

confidence: 99%

Geopolymers and Alkali-Activated Materials for Wastewater Treatment Applications and Valorization of Industrial Side Streams

Samarina¹,

Takaluoma²,

Laatikainen³

2021

Advances in Geopolymer-Zeolite Composites - Synthesis and Characterization

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The EU has the ambitious goal to transition from linear to circular economy. In circular economy, the old saying of “one’s waste is the other’s treasure” is being implemented. In this chapter, valorisation of industrial side streams, traditionally branded as waste, is discussed with respect to their applications as raw materials for new adsorptive products – geopolymers (GP) and alkali-activated materials (AAM) – as adsorbents in wastewater treatment. The chemical nature and structure of materials generally have great influence on GP/AAM adsorption capability. The approaches used for the raw materials preparation (chemical or physical) prior geopolymerization to increase the adsorption capacity of the final products will be discussed. Adsorption properties and performance of GPs/AAMs towards various contaminants are described, and the latest research on testing those materials as water remediation are reviewed. Special attention is paid to regeneration of exhausted materials and available resource recovery options that the regeneration approach opens. New forms of geopolymer adsorbent such as foams or core-shell structures are described and in the last part of the chapter, a short economic evaluation of resource recovery models is provided.

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“…In other words, adsorption has become the better way to treat MB and Cr(VI) simultaneously because of its simple operation and its being green and environmentally friendly. However, the cost of most adsorbents always limits their applications; it is urgent to develop low-cost and efficient adsorbents [16], such as low-cost activated carbon [17][18][19], natural clay, zeolite, biomass and geopolymers [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Behaviors and Mechanisms of Adsorption of MB and Cr(VI) by Geopolymer Microspheres under Single and Binary Systems

Fang,

Yang,

Rao

et al. 2024

Molecules

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Geopolymers show great potential in complex wastewater treatment to improve water quality. In this work, general geopolymers, porous geopolymers and geopolymer microspheres were prepared by the suspension curing method using three solid waste products, coal gangue, fly ash and blast furnace slag. The microstructure, morphology and surface functional groups of the geopolymers were studied by SEM, XRD, XRF, MIP, FTIR and XPS. It was found that the geopolymers possess good adsorption capacities for both organic and inorganic pollutants. With methylene blue and potassium dichromate as the representative pollutants, in order to obtain the best removal rate, the effects of the adsorbent type, dosage of adsorbent, concentration of methylene blue and potassium dichromate and pH on the adsorption process were studied in detail. The results showed that the adsorption efficiency of the geopolymers for methylene blue and potassium dichromate was in the order of general geopolymers < porous geopolymers < geopolymer microspheres, and the removal rates were up to 94.56% and 79.46%, respectively. Additionally, the competitive adsorption of methylene blue and potassium dichromate in a binary system was also studied. The mechanism study showed that the adsorption of methylene blue was mainly through pore diffusion, hydrogen bond formation and electrostatic adsorption, and the adsorption of potassium dichromate was mainly through pore diffusion and redox reaction. These findings demonstrate the potential of geopolymer microspheres in adsorbing organic and inorganic pollutants, and, through five cycles of experiments, it is demonstrated that MGP exhibits excellent recyclability.

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Preparation of a novel magnetic geopolymer/zero–valent iron composite with remarkable adsorption performance towards aqueous Acid Red 97

Cited by 21 publications

References 52 publications

A comprehensive review on sustainable clay-based geopolymers for wastewater treatment: circular economy and future outlook

A comprehensive review on sustainable clay-based geopolymers for wastewater treatment: circular economy and future outlook

Geopolymers and Alkali-Activated Materials for Wastewater Treatment Applications and Valorization of Industrial Side Streams

Behaviors and Mechanisms of Adsorption of MB and Cr(VI) by Geopolymer Microspheres under Single and Binary Systems

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