Antimicrobial activity of geopolymers ion-exchanged with copper ions

Hashimoto, Shinobu; Machino, Tatsuya; Takeda, Hiromasa; Daiko, Yusuke; Honda, Sawao; Iwamoto, Yuji

doi:10.1016/j.ceramint.2015.08.061

Cited by 30 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…AAMs have many potential applications in water and wastewater treatment, including adsorbents/ion-exchangers, membranes and filtration media, photocatalysts, and solidification/stabilization of water and wastewater treatment residues. In addition, they can be used as antibacterial materials after the incorporation of copper (Hashimoto et al 2015) or silver (O'Connor et al 2010) through ion exchange or addition of nanoparticles (such as silver silica nanocomposites) into the aluminosilicate matrix of AAMs (Adak et al 2015). Although the aforementioned examples were intended as antimicrobial binders, there are numerous examples with similarly modified zeolites to indicate potential applicability for disinfection of wastewaters or groundwater (Akhigbe et al 2014;De la Rosa-Gómez et al 2008a, b;Dolic et al 2015;Mpenyana-Monyatsi et al 2012;Johari et al 2016).…”

Section: Applications In Water and Wastewater Treatmentmentioning

confidence: 99%

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

Luukkonen

Heponiemi

Runtti

et al. 2019

Rev Environ Sci Biotechnol

136

View full text Add to dashboard Cite

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.

show abstract

Section: Applications In Water and Wastewater Treatmentmentioning

confidence: 99%

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

Luukkonen

Heponiemi

Runtti

et al. 2019

Rev Environ Sci Biotechnol

136

View full text Add to dashboard Cite

show abstract

“…These chemically resistant aluminosilicate structures may even withstand the aggressive conditions frequently met in wastewater systems [33]. They exhibit good antimicrobial effects on Cu 2+ -treated geopolymer surfaces and a sufficient in vitro stability in the long term [69,70]. Hashimoto et al [70] have demonstrated that the antimicrobial activity of metakaolin-based geopolymers against fungi hyphae can be increased by the incorporation of Cu 2+ into the geopolymer structure.…”

Section: Implications For Water Treatment and Environmental Remediationmentioning

confidence: 99%

Substantial Copper (Cu2+) Uptake by Metakaolin-Based Geopolymer and Its Resistance to Acid Leaching and Ion Exchange

et al. 2023

View full text Add to dashboard Cite

Geopolymers are inorganic, chemically resistant aluminosilicate-based binding agents, which remove hazardous metal ions from exposed aqueous media. However, the removal efficiency of a given metal ion and the potential ion remobilization have to be assessed for individual geopolymers. Therefore, copper ions (Cu2+) were removed by a granulated, metakaolin-based geopolymer (GP) in water matrices. Subsequent ion exchange and leaching tests were used to determine the mineralogical and chemical properties as well as the resistance of the Cu2+-bearing GPs to corrosive aquatic environments. Experimental results indicate the pH of the reacted solutions to have a significant impact on the Cu2+ uptake systematics: the removal efficiency ranged from 34–91% at pH 4.1–5.7 up to ~100% at pH 11.1–12.4. This is equivalent to Cu2+ uptake capacities of up to 193 mg/g and 560 mg/g in acidic versus alkaline media. The uptake mechanism was governed by Cu2+-substitution for alkalis in exchangeable GP sites and by co-precipitation of gerhardtite (Cu2(NO3)(OH)3) or tenorite (CuO) and spertiniite (Cu(OH)2). All Cu-GPs showed excellent resistance to ion exchange (Cu2+ release: 0–2.4%) and acid leaching (Cu2+ release: 0.2–0.7%), suggesting that tailored GPs have a high potential to immobilize Cu2+ ions from aquatic media.

show abstract

“…Nowadays, geopolymers are regarded as versatile materials, which have drawn attention in scores of environmental applications, and hence, are being employed nearly in all fields of technology, for instance, in water and wastewater treatment as adsorbents or ion-exchangers, high-pressure membranes and filtration media, photo-catalysts, anti-microbial materials, pH buffers, carrier media in bioreactors and for the solidification or stabilization of water and wastewater treatment residues. The applications are not merely those; they can be employed as anti-bacterial materials following their incorporation with copper (Cu) or silver (Ag) in the course of ion exchange or supplementation of nanoparticles, namely, silver-silica nano-composites into the geopolymeric alumina-silicate matrix [ 86 , 87 , 88 ]. Thus, they are useful as anti-microbial binders with analogously modified plentiful zeolites to designate their potential usage for the disinfection of wastewaters or sub-surface water [ 89 , 90 , 91 ].…”

Section: Applications Of Geopolymers For Water and Wastewater Treatmentmentioning

confidence: 99%

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

Luhar

Abdullah

et al. 2021

Materials

View full text Add to dashboard Cite

There is nothing more fundamental than clean potable water for living beings next to air. On the other hand, wastewater management is cropping up as a challenging task day-by-day due to lots of new additions of novel pollutants as well as the development of infrastructures and regulations that could not maintain its pace with the burgeoning escalation of populace and urbanizations. Therefore, momentous approaches must be sought-after to reclaim fresh water from wastewaters in order to address this great societal challenge. One of the routes is to clean wastewater through treatment processes using diverse adsorbents. However, most of them are unsustainable and quite costly e.g. activated carbon adsorbents, etc. Quite recently, innovative, sustainable, durable, affordable, user and eco-benevolent Geopolymer composites have been brought into play to serve the purpose as a pretty novel subject matter since they can be manufactured by a simple process of Geopolymerization at low temperature, lower energy with mitigated carbon footprints and marvellously, exhibit outstanding properties of physical and chemical stability, ion-exchange, dielectric characteristics, etc., with a porous structure and of course lucrative too because of the incorporation of wastes with them, which is in harmony with the goal to transit from linear to circular economy, i.e., “one’s waste is the treasure for another”. For these reasons, nowadays, this ground-breaking inorganic class of amorphous alumina-silicate materials are drawing the attention of the world researchers for designing them as adsorbents for water and wastewater treatment where the chemical nature and structure of the materials have a great impact on their adsorption competence. The aim of the current most recent state-of-the-art and scientometric review is to comprehend and assess thoroughly the advancements in geo-synthesis, properties and applications of geopolymer composites designed for the elimination of hazardous contaminants viz., heavy metal ions, dyes, etc. The adsorption mechanisms and effects of various environmental conditions on adsorption efficiency are also taken into account for review of the importance of Geopolymers as most recent adsorbents to get rid of the death-defying and toxic pollutants from wastewater with a view to obtaining reclaimed potable and sparkling water for reuse offering to trim down the massive crisis of scarcity of water promoting sustainable water and wastewater treatment for greener environments. The appraisal is made on the performance estimation of Geopolymers for water and wastewater treatment along with the three-dimensional printed components are characterized for mechanical, physical and chemical attributes, permeability and Ammonium (NH4+) ion removal competence of Geopolymer composites as alternative adsorbents for sequestration of an assortment of contaminants during wastewater treatment.

show abstract

Antimicrobial activity of geopolymers ion-exchanged with copper ions

Cited by 30 publications

References 22 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

Substantial Copper (Cu2+) Uptake by Metakaolin-Based Geopolymer and Its Resistance to Acid Leaching and Ion Exchange

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

Contact Info

Product

Resources

About