Fly ash-based geopolymer: clean production, properties and applications

Zhuang, Xiao Yu; Chen, Liang; Komarneni, Sridhar; Zhou, Chun Hui; Tong, Dong Shen; Yang, Hui; Yu, Wei; Wang, Hao

doi:10.1016/j.jclepro.2016.03.019

Cited by 722 publications

(304 citation statements)

References 143 publications

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“…5), and obtain the perfect glass slag, which could be utilized as construction materials such as road-fill and concrete aggregate. The washing pretreatment method may cause higher running cost and potential ecological risk [10,19]. In summary, in the three treatment methods, the fly ash be wrapped with glass bottle is the best method.…”

Section: Toxicity Characteristic Leaching Procedures Resultsmentioning

confidence: 99%

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Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Fang

Chen

et al. 2017

Fuel

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Keywords:MSW incineration fly ash Heavy metals Volatilization and leaching behavior DC arc plasma CaO -Al 2 O 3 -SiO 2 (CAS) A B S T R A C T Three fly ash samples collected from different waste incinerators were vitrified using a direct current arc plasma furnace at 1250-1400°C. The influence of water-wash extraction and wrapping pretreatment on the volatilization and leaching behavior of heavy metals was investigated. Results showed: After thermal arc plasma treatment, the volume reduction and weight loss of fly ash were in the range of 68.7-82.2% and 23.8-56.7%, respectively. The residual fractions (wt.%) of heavy metals in slag are in the following sequence: Cr < Ni < Cd < Pb < Cu < Zn. Water-washing could reduce the volatilization rate of heavy metals due to some volatile salts removed by washing, while wrapping of fly ash could most effectively resist heavy metals against volatilizing, especially for Zn and Ni. The possible CaO -Al 2 O 3 -SiO 2 (CAS) ratio for successful melting of fly ash is suggested to be CaO in range of 20-48%, Al 2 O 3 in range of 10-15%, and SiO 2 in range of 40-65%. Moreover, toxicity characteristic leaching procedure results showed that the leaching of heavy metals in slags was much lower than the standard limit of toxicity characteristic leaching procedure (TCLP).

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Section: Toxicity Characteristic Leaching Procedures Resultsmentioning

confidence: 99%

“…To form good glass crystal, proper ratio between CaO, SiO 2 , Al 2 O 3 is necessary [18][19][20]. Thus, addition of SiO 2 as agent is considered, and two different experiments designed.…”

Section: Vitrificationmentioning

confidence: 99%

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Fang

Chen

et al. 2017

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“…The literature data indicate their application in construction materials [32], synthetic zeolites [40], sorbents [9], and geopolymers [41]. In order to assess the flow of heavy metal to the environment from industrial wood ash and the direction of its application, the research of physicochemical properties and chemical composition of ash, morphology, and mapping elements in micro-regions (grains), fractionation, and mobility of metals using SEM/EDS, FT-IR, TG-DTG, FAS, and sequential extraction methods were performed.…”

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confidence: 99%

The Physicochemical Properties and Composition of Biomass Ash and Evaluating Directions of its Applications

Kalembkiewicz¹,

Galas²,

Sitarz-Palczak³

2018

Pol. J. Environ. Stud.

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“…This is a significant contributor to China's recent air quality and haze problems [9,10]. However, with developing science and technology, FA from power plants is changing from industrial waste into an industrial raw material [11][12][13]. FA particles are porous and honeycombed, with large specific surface areas and high adsorption activities.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Multifunctional Hybrid Composites Using Fly Ash to Control Environmental Pollutants: A Review

Ge¹,

Yoon²,

Choi³

2018

Preprint

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Air pollutants such as volatile organic compounds (VOCs), nitrogen oxides (NOx), sulfur dioxide (SO2), as well as water pollutants including heavy metal, are harmful to human and environment. Effective control and reduction of their pollution is therefore an important topic for today's scientists. Fly ash (FA) is a type of industrial waste that can cause multiple environmental problems if discharged into the air. On the other hand, because of its high porosity, large specific surface area, and other unique characteristics, the FA can also be used as a low-cost and high efficient adsorbent with some simple modifications. This paper reviews the effects of FA on treatment of the above air and water pollution based on our research experience over many years, including to the current status of global FA utilization, physicochemical properties, principle of adsorption, and the application direction of FA in the future. It focuses on the use of nanocomposite technology to fabricate functional FA fibrous membranes to adsorb VOCs from air, and treat heavy metal wastewater. This present review first describes the fabrication technology of FA nanocomposites and their mechanism of adsorption VOCs from air. Utilization of nanofiber technology to fabricate multi-functional FA emerging composite materials to mitigate air and water pollution has great potential in the future, especially use of pollutant material to control other pollutants.

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Fly ash-based geopolymer: clean production, properties and applications

Cited by 722 publications

References 143 publications

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

The Physicochemical Properties and Composition of Biomass Ash and Evaluating Directions of its Applications

Fabrication of Multifunctional Hybrid Composites Using Fly Ash to Control Environmental Pollutants: A Review

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