Porous sound-absorbing materials prepared from fly ash

Qi, Liqiang; Xu, Jun; Liu, Kunyang

doi:10.1007/s11356-019-05573-5

Cited by 17 publications

(10 citation statements)

References 18 publications

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“…Pb (II) stock solution (10 g/L) was prepared by dissolving PbCl 2 in deionized water (DiW) and further diluted for batch reactions [36]. Sorption tests were carried in 250 mL Erlenmeyer flasks, with constant stirring at 200 rpm at 25 • C. In these experiments, the initial metal ion concentration (100-300 mg/L), mass of Na-zeolites (0.25-1.5 g), pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), and time (10-90 min) of the heterogeneous mixture were evaluated by batch experiments. After the programmed time, each reaction vessel was removed from the shaker, and the supernatant collected by filtering the suspension was set apart in a refrigerator at ≈4 • C for ICP-OES analysis.…”

Section: Sorption Of Toxic Metal (Pb-ii) From Wastewatermentioning

confidence: 99%

“…Nowadays, researchers are utilizing fly ash waste for the synthesis of valueadded adsorbent materials. The novel approach for utilizing fly ash waste into unique Na-zeolites contributes equally to modern solid waste management and the economical treatment of wastewater [3]. In several underdeveloped countries, there are deleterious consequences of polluted water as a result of rapid growth in their population, scarcity of water resources, and insufficient water treatment systems.…”

Section: Introductionmentioning

confidence: 99%

“…Industrial wastewater contains a heavy load of metal ions and salts in addition to other organic pollutants. The carcinogenic and mutagenic nature of potentially toxic metals such as Pb, Hg, As, and Cd has already been classified as a priority pollutant [3,4]. These metals are distinguished toxicants even at negligible concentrations, which affect organelles involved in detoxification, the DNA repairing system, and metabolism [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Na-Zeolites from Textile Waste Ash and Its Application for Removal of Lead (Pb) from Wastewater

Hussain

Chatha

et al. 2021

IJERPH

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Massive production of carcinogenic fly ash waste poses severe threats to water bodies due to its disposal into drains and landfills. Fly ash can be a source of raw materials for the synthesis of adsorbents. Rag fly ash as a new class of raw materials could be a cheap source of Al and Si for the synthesis of Na-zeolites. In this work, NaOH activation, via a prefusion- and postfusion-based hydrothermal strategy, was practiced for the modification of rag fly ash into Na-zeolite. Morphology, surface porosity, chemical composition, functionality, mineral phases, and crystallinity, in conjunction with ion exchangeability of the tailored materials, were evaluated by SEM, ICP-OES, XRF, FTIR, XRD, and cation exchange capacity (CEC) techniques. Rag fly ash and the synthesized Na-zeolites were applied for the removal of Pb (II) from synthetic wastewater by varying the reaction conditions, such as initial metal ion concentration, mass of adsorbent, sorption time, and pH of the reaction medium. It was observed that Na-zeolite materials (1 g/100 mL) effectively removed up to 90–98% of Pb (II) ions from 100 mg/L synthetic solution within 30 min at pH ≈ 8. Freundlich adsorption isotherm favors the multilayer heterogeneous adsorption mechanism for the removal of Pb (II). It is reasonable to conclude that recycling of textile rag fly ash waste into value-added Na-zeolites for the treatment of industrial wastewater could be an emergent move toward achieving sustainable and green remediation.

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Section: Sorption Of Toxic Metal (Pb-ii) From Wastewatermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Na-Zeolites from Textile Waste Ash and Its Application for Removal of Lead (Pb) from Wastewater

Hussain

Chatha

et al. 2021

IJERPH

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“…Fly ash (FA) is an important inorganic filler which is widely used in industrial production. Thus, the comprehensive utilization of the waste fly ash is urgent and significant to the long-term sustainable development of industrial production and environmental protection [ 25 ]. That is, the effective utilization of fly ash not only solves the problem of environmental pollution, but also produces high value-added products.…”

Section: Introductionmentioning

confidence: 99%

Facile and Controllable Preparation of Poly(St-co-MMA)/FA Microspheres Used as Ultra-Lightweight Proppants

et al. 2021

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Hydraulic fracturing is an important technology for the exploitation of unconventional oil or gas reservoirs. In order to increase the production of oil or gas, ultra-lightweight proppants with a high compressive strength are highly desirable in hydraulic fracture systems. In this work, a new type of ultra-lightweight proppant, poly(styrene-co-methyl methacrylate)/fly ash (poly(St-co-MMA)/FA) composites with a high compressive strength were prepared via in situ suspension polymerization. The Fourier transform infrared (IR) and X-ray powder diffraction (XRD) analyses confirmed that the poly(St-co-MMA)/FA composites were successfully prepared. The morphology analysis indicated that the composite microspheres show good sphericity, and FA powder was evenly dispersed in the matrix. The apparent density of the microspheres was between 1 and 1.3 g/cm3, which is suitable for hydraulic fracturing. Furthermore, the compressive strength and thermostability were dramatically improved with the incorporation of FA, which could withstand high pressures and temperatures underground. The obtained poly(St-co-MMA)/FA composite microspheres are promising for application as an ultra-lightweight (ULW) proppant in oil or gas exploitation, which provides a new approach for the design of high performance proppants.

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“…Usually, resonators [1,2] and flat multi-layered sound absorbers consist of porous material, perforated panel, and air gap are well-known elements for low-frequency absorption [3,4]. Materials science development has allowed the fabrication of improved sound energy decaying porous materials [5][6][7][8][9][10]. Physical properties such as density, porosity, and tortuosity are important factors that can influence the acoustical properties of porous materials [7,8].…”

Section: Introductionmentioning

confidence: 99%

Morphological investigation of carbon nanotube reinforced polyurethane foam to analyse its acoustical and non‐acoustical properties

Basirjafari

2020

Micro & Nano Letters

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Porous sound-absorbing materials prepared from fly ash

Cited by 17 publications

References 18 publications

Synthesis and Characterization of Na-Zeolites from Textile Waste Ash and Its Application for Removal of Lead (Pb) from Wastewater

Synthesis and Characterization of Na-Zeolites from Textile Waste Ash and Its Application for Removal of Lead (Pb) from Wastewater

Facile and Controllable Preparation of Poly(St-co-MMA)/FA Microspheres Used as Ultra-Lightweight Proppants

Morphological investigation of carbon nanotube reinforced polyurethane foam to analyse its acoustical and non‐acoustical properties

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