porous geopolymer spheres as novel ph buffering materials

porous geopolymer spheres as novel ph buffering materials

porous geopolymer spheres as novel ph buffering materials

Porous geopolymer spheres as novel pH buffering materials ...Feb 01, 2017 · Porous biomass fly ash-based geopolymer spheres for pH regulation were developed. • The raw materials chemical composition dictates the pH buffering capacity. • Fly ash-based spheres exhibiting gradual and prolonged leaching were produced. • The narrow pH decay suggests their use as pH regulators in anaerobic digestion. •

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Waste-based alkali-activated materials for wastewater porous geopolymer spheres as novel ph buffering materials

In this study, and for the first time, red mud (RM)-based geopolymer spheres were synthesised, with varying porosity and RM content, and then their use as pH regulators was evaluated.Universidade do Minho: Red mud-based geopolymers with porous geopolymer spheres as novel ph buffering materialsResumo (s) : This study develop novel porous red mud (RM) based geopolymers and evaluates their potential to ensure prolonged pH control. Several properties of the novel geopolymers were examined including buffering ability, alkalis leaching behaviour, mineralogical composition, microstructure and physical properties.The effect of porous alkali activated material composition porous geopolymer spheres as novel ph buffering materialsAAMs could be used as pH buffering materials due to free leachable alkalis in their pore solution. High SiO 2 and Na 2 O content of metakaolin geopolymer promotes leaching, whereas high Al 2 O 3 porous geopolymer spheres as novel ph buffering materials

Synthetic Geopolymers for Controlled Delivery of Oxycodone porous geopolymer spheres as novel ph buffering materials

Geopolymers. Fig. 1 illustrates the synthesis of geopolymer pellets. Briefly; a sodium silicate solution was prepared by adding 0.2 g NaOH per ml to a commercial sodium silicate solution containing 10.6% NaOH and 26.5% SiO 2 (Sigma-Aldrich). Three different types of geopolymers were produced solely for material characterization by mixing the prepared sodium silicate solution with each of the porous geopolymer spheres as novel ph buffering materialsSynthesis of porous alkali-activated materials for high porous geopolymer spheres as novel ph buffering materialsFeb 01, 2020 · Commercial biochar production costs can range from $300 to $7000 per ton [ 11 ]. Recently, porous geopolymers have been reported for use as pH buffering materials [ 12, 13 ]. These materials show a promising ability for pH control. However, the monitoring of these materials in acidic wastewater has not been reported.Surface Modification of Cured Inorganic Foams with porous geopolymer spheres as novel ph buffering materialsNovel porous biomass fly ash-contg. geopolymer monoliths were produced using a simple and flexible procedure. Geopolymers exhibiting distinct total porosities (41.0-78.4%) and low apparent d. (1.21-0.44 g/cm3) were fabricated. Afterwards, the possibility of using these innovative materials as lead adsorbents under distinct conditions was evaluated.

Structural and electrical properties of geopolymer porous geopolymer spheres as novel ph buffering materials

Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite) porous geopolymer spheres as novel ph buffering materials M. P. Seabra, J. A. Labrincha, Porous geopolymer spheres as novel pH buffering materials. J. Clean. Prod. 143, 11141122 (2017). porous geopolymer spheres as novel ph buffering materials A. V. Virkar, Conductivity of porous Sm2O3-doped CeO2 as a function of temperature porous geopolymer spheres as novel ph buffering materialsRui Miguel Novais - CICECO - Aveiro Institute of MaterialsNovel porous fly ash-containing geopolymer monoliths for lead adsorption from wastewaters. Journal of Hazardous Materials 318, 631-640. DOI: 10.1016/j.jhazmat.2016.07.059. Novais R.M., Seabra M.P., Labrincha J.A., 2017. Porous geopolymer spheres as novel pH buffering materials. Journal of Cleaner Production 143, 1114-1122.Removal of ammonium from wastewater with geopolymer porous geopolymer spheres as novel ph buffering materialsOct 01, 2020 · The advantage of describing the permeability of porous materials using the k 1 and k 2 parameters is that they are intrinsic properties of the pores (depending on their size, volume, morphology, porous geopolymer spheres as novel ph buffering materials R.M. Novais, M.P. Seabra, J.A. LabrinchaPorous geopolymer spheres as novel pH buffering materials. J. Clean.

Porous geopolymer spheres as novel pH buffering materials porous geopolymer spheres as novel ph buffering materials

The application of geopolymers is mainly focused on building materials, owing to their high strength gain. Due to the availability of free alkali in the geopolymer framework, other applications porous geopolymer spheres as novel ph buffering materialsPorous geopolymer spheres as novel pH buffering materials porous geopolymer spheres as novel ph buffering materialsFeb 01, 2017 · Porous biomass fly ash-based geopolymer spheres for pH regulation were developed. The raw materials chemical composition dictates the pH buffering capacity. Fly ash-based spheres exhibiting gradual and prolonged leaching were produced. The narrow pH decay suggests their use as pH regulators in anaerobic digestion. Porous geopolymer spheres as novel pH buffering The y ash-based spheres showed superior pH buffer capacity than their metakaolin-based counterparts, with a narrow pH uctuation (1.6e1.9) over the 30 days measurements. The maximum leaching of hydroxyl ions from the geopolymer spheres (0.0317 mol/dm3 g) demonstrates the high pH buffer capacity of this innovative material, suggesting

OneStep Fabrication of Ultrathin Porous Nickel Hydroxide porous geopolymer spheres as novel ph buffering materials

Jul 12, 2013 · A facile onestep hydrothermal codeposition method for growth of ultrathin Ni(OH) 2 MnO 2 hybrid nanosheet arrays on three dimensional (3D) macroporous nickel foam is presented. Due to the highly hydrophilic and ultrathin nature of hybrid nanosheets, as well as the synergetic effects of Ni(OH) 2 and MnO 2, the asfabricated Ni(OH) 2 MnO 2 hybrid electrode exhibits an ultrahigh porous geopolymer spheres as novel ph buffering materialsOn Valorization of Volcanic Ash, Waste Pen Shells, and Red porous geopolymer spheres as novel ph buffering materials*Corresponding author: du.ph, Phone: +632-524-4611, Fax: +632-524-0563 Abstract This study utilizes volcanic ash and red clay, as well as calcined waste pen shell (Baluko) in the production of geopolymer-based materials. The geopolymers were formed by activating the mixture of these raw materials (as theNovel porous fly ash-containing geopolymers for pH porous geopolymer spheres as novel ph buffering materialsThese RM-based geopolymer spheres are expected to show much higher surface area than the previously reported RM-containing geopolymer monoliths [12] and, therefore, much higher pH buffering porous geopolymer spheres as novel ph buffering materials

Novel porous fly ash-containing geopolymers for pH porous geopolymer spheres as novel ph buffering materials

Jun 15, 2016 · In this work novel, porous biomass fly ash-containing geopolymers with high pH buffer capacity and tailored alkalis leaching were produced by using hydrogen peroxide as blowing agent. Results demonstrate that the geopolymers leaching rate can be controlled by the hydrogen peroxide content and by the solids-to-liquid ratio during geopolymers preparation.NaA zeolite synthesis from geopolymer precursor | MRS porous geopolymer spheres as novel ph buffering materialsOct 10, 2011 · Journal of Porous Materials, Vol. 22, Issue. 1, p. 291. CrossRef; porous geopolymer spheres as novel ph buffering materials Preparation of NaA zeolite spheres from geopolymer gels using a one-step method in silicone oil. International Journal of Applied Ceramic Technology, Vol. 14, Issue. 5, p. 982. porous geopolymer spheres as novel ph buffering materials Characterization of novel geopolymer Zeolite composites as solid adsorbents for CO2 capture porous geopolymer spheres as novel ph buffering materialsMaterials | Free Full-Text | Hybrid Geopolymeric Foams for porous geopolymer spheres as novel ph buffering materialsThe foams were realized by the in situ foaming of a hybrid geopolymer obtained by a reaction of metakaolin and polysiloxane oligomers under strong alkaline conditions and then cured at room temperature. In this way, porous materials with densities ranging from 0.4 to 0.7 g/cm3 and showing good mechanical properties were produced.

Maria SEABRA | Researcher | PhD | University of Aveiro porous geopolymer spheres as novel ph buffering materials

Red mud-based inorganic polymer spheres were used as alternative pH regulators and process enhancers in sequencing batch anaerobic reactors treating cheese whey.Low-Calcium, Porous, Alkali-Activated Materials as Novel porous geopolymer spheres as novel ph buffering materialsIn this study, the low-calcium, porous, alkali-activated material (pAAM) was characterized to understand the impact of the aluminum silicate source and heat treatment on basic properties for material that might be used in water treatment systems as a softener by stabilizing the pH. The studied porous alkali-activated materials may ensure stable and long-lasting (30 days) pH (pH 10.311.6) KOH-Activated Geopolymer Microspheres Recycle Co(II) with porous geopolymer spheres as novel ph buffering materialsA new type of absorbent with high efficiency was synthesized by KOH-activated slag-based geopolymer microspheres (K-SGM), which exhibited higher adsorption capacities for recycling Co(II) (Qe,K-SGM = 192.31 mg/g, Qe,Na-SGM = 91.21 mg/g) than NaOH-activated ones (Na-SGM). During the Co(II) adsorption process, these two kinds of geopolymeric adsorbents could be combined with heavy metal

Journal of Cleaner Production -

Geopolymer Red mud Alkali leaching pH buffering abstract This study develop novel porous red mud (RM) based geopolymers and evaluates their potential to ensure prolonged pH control. Several properties of the novel geopolymers were examined including buffering ability, alkalis leaching behaviour, mineralogical composition, microstructure and porous geopolymer spheres as novel ph buffering materialsFreezeCasting of Porous Ceramics: A Review of Current porous geopolymer spheres as novel ph buffering materialsMar 20, 2008 · Gyu-Bin Choe, Gyu-Nam Kim, Hyun Lee, Young-Hag Koh, Hyoun-Ee Kim, Novel camphene/photopolymer solution as pore-forming agent for photocuring-assisted additive manufacturing of porous ceramics, Journal of the European Ceramic Society, Developments in Porous, Biological and Geopolymer Developments in Porous, Biological and Geopolymer Ceramics: Ceramic Engineering and Science Proceedings, Volume 28, Issue 9. porous geopolymer spheres as novel ph buffering materials He received his Ph.D. degree in Chemical Engineering and Materials Science from theUniversity ofMinnesota in 1996. porous geopolymer spheres as novel ph buffering materials GeopolymerJute Composite: A Novel Environmentally Friendly Composite with Fire Resistant porous geopolymer spheres as novel ph buffering materials

Cork-containing alkali activated composites: a porous geopolymer spheres as novel ph buffering materials

Cork-containing alkali activated composites: a multifunctional ultra-light building material Rui M. Novais1, J. Carvalheiras 1, L. Senff 2, M.P. Seabra 1, R.C. Pullar 1, J.A. Labrincha 1,* *t 1 Materials and Ceramic Engineering Department / CICECO Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, PortugalCICECO » João António Labrincha BatistaCreated in 2002 at the University of Aveiro, Portugal,with the mission of developing the scientific and technological knowledge necessary for the innovative production and transformation of ceramics and organic-inorganic hybrids and materials for a sustainable developmentBioactive Glass-Ceramic Scaffolds from Novel Inorganic porous geopolymer spheres as novel ph buffering materialsGlasses with engineered chemical composition (alumino-silicate glasses) can be used as precursors for geopolymer-like materials [25,26,27] to be used as new binders for the building industry, according to the formation of sodium alumino-silicate hydrate (NASH) and calcium alumino-silicate hydrate (CASH) gels. With proper porous geopolymer spheres as novel ph buffering materials

Application of alkali-activated materials for water and porous geopolymer spheres as novel ph buffering materials

Mar 02, 2019 · 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)

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