Emerging sustainable solutions for depollution: Geopolymers

Asim, Nilofar; Alghoul, M. A.; Mohammad, Masita; Amin, Mohamad Hassan; Akhtaruzzaman, Md.; Amin, Nur Azma; Sopian, Kamaruzzaman

doi:10.1016/j.conbuildmat.2018.12.043

Cited by 95 publications

(28 citation statements)

References 111 publications

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“…AAMs have been studied as catalysts or catalyst supports for pollutant degradation in both gas and liquid phase reactions (Asim et al 2019). In water and wastewater treatment, they have been so far applied as photocatalysts (i.e., reactive radicals are produced when the catalyst is exposed to irradiation with energy equal to or larger than the bandgap) for degradation of various dyes.…”

Section: Catalystsmentioning

confidence: 99%

Application of alkali-activated materials for water and wastewater treatment: a review

Luukkonen

Heponiemi

Runtti

et al. 2019

Rev Environ Sci Biotechnol

137

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Alkali-activation (or geopolymer) technology has gained a great deal of interest for its potential applications in water and wastewater treatment during the last decade. Alkali-activated materials can be prepared via a relatively simple and low-energy process, most commonly by treating aluminosilicate precursors with concentrated alkali hydroxide and/or silicate solutions at (near) ambient conditions. The resulting materials are, in general, amorphous, have good physical and chemical stability, ion-exchange properties, and a porous structure. Several of the precursors are industrial by-products or other readily available low-cost materials, which further enhances the environmental and economic feasibility. The application areas of alkali-activated materials in water and wastewater treatment are adsorbents/ion-exchangers, photocatalysts, high-pressure membranes, filter media, anti-microbial materials, pH buffers, carrier media in bioreactors, and solidification/stabilization of water treatment residues. The purpose of this review is to present a comprehensive evaluation of the rapidly growing prospects of alkali-activation technology in water and wastewater treatment.

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Section: Catalystsmentioning

confidence: 99%

Application of alkali-activated materials for water and wastewater treatment: a review

Luukkonen

Heponiemi

Runtti

et al. 2019

Rev Environ Sci Biotechnol

137

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“…To ensure the availability of resources for next generations, developing some measures that focus on energy conservation and limited usage of non‐renewable energy resources is necessary 2 . Researchers have been working towards enhancing the sustainability and the energy efficiency of the construction industry 3–7 . One of which is the utilization of alternate materials in concrete, such as industrial by‐products and solid waste materials ( 8–11 ).…”

Section: Introductionmentioning

confidence: 99%

An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash

Prakash¹,

Thenmozhi²,

Raman

et al. 2020

Structural Concrete

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This study investigated the effect of adding fly ash on the mechanical and durability characteristics of coconut shell (CS) concrete. Two different mixes were developed, one with CS and the other with conventional aggregate and CS as coarse aggregate. Cement was replaced with Class F fly ash in terms of weight at 0, 10, 20, and 30% in both mixes. Test result showed that the CS concrete with 10% fly ash replacement level exhibited the highest compressive and tensile strength. The addition of fly ash decreased the porosity of CS concrete due to its fineness and increased hydration products in the matrix at later ages. Additionally, it also improved the weak aggregate interfacial transition zone of CS lightweight concrete. Thus, the fly ash addition in CS concrete showed lower values of water absorption, permeable voids, sorptivity, and chloride permeability. Furthermore, the increasing content of fly ash addition improved the durability characteristics of CS concrete considerably.

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“…Previous numerous studies investigated the opportunity to use a wide range of geopolymeric secondary raw materials to geopolymer synthesis such as fly ash, blast furnace slag, bottom ash, large assortments of waste glass, silica residue, red mud, rice husk ash, fayalite slag, etc. 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Influence of red mud and waste glass on the microstructure, strength, and leaching behavior of bottom ash-based geopolymer composites

Bobiricǎ¹,

Orbeci²,

Bobiricǎ³

et al. 2020

Sci Rep

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The influence of waste glass and red mud addition as alternative source of aluminosilicate precursors on the microstructural, mechanical, and leaching properties of bottom ash-based geopolymer was studied in this work through mineralogical, morphological, and spectroscopic analysis, as well as by conducting compressive strength and leaching tests. The bottom ash-based geopolymer composites were synthesized by adding a constant amount of waste glass (10% by weight) and increasing amounts of red mud (up to 30% by weight). The results derived from FTIR, 29Si and 27Al MAS NMR, and SEM–EDX revealed that adding up to 10% (by weight) red mud to the synthesis mixes leads to an increase in the degree of geopolymerization of the activated mixes. The compressive strength followed the same trend. An increase of more than 10% (by weight) red mud added to the synthesis mixes results in a significant decrease of compressive strength of the geopolymer composites. A low leachability of geopolymer composites in regard with their contaminants was revealed especially for those with good compressive strength.

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Emerging sustainable solutions for depollution: Geopolymers

Cited by 95 publications

References 111 publications

Application of alkali-activated materials for water and wastewater treatment: a review

Application of alkali-activated materials for water and wastewater treatment: a review

An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash

Influence of red mud and waste glass on the microstructure, strength, and leaching behavior of bottom ash-based geopolymer composites

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