Safe disposal and recyclability of MSWI fly ash via mold-pressing and alkali-activation technology: promotion of metakaolin and mechanism

2022 ◽  
pp. 107166
Author(s):  
Xuankun Wei ◽  
Ningning Shao ◽  
Feng Yan ◽  
Pengju Wang ◽  
Feng Xie ◽  
...  
Keyword(s):  
Fly Ash ◽  
Alkali Activation ◽  
Mswi Fly Ash ◽  
Safe Disposal

A mini-review of heavy metal recycling technologies for municipal solid waste incineration fly ash

2021 ◽  
pp. 0734242X2110039
Author(s):  
Huan Wang ◽  
Fenfen Zhu ◽  
Xiaoyan Liu ◽  
Meiling Han ◽  
Rongyan Zhang
Keyword(s):  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Incineration ◽  
Electrochemical Process ◽  
Chemical Extraction ◽  
Air Pollution Control ◽  
Municipal Solid Waste Incineration ◽  
Mswi Fly Ash ◽  
Metal Recycling

This mini-review article summarizes the available technologies for the recycling of heavy metals (HMs) in municipal solid waste incineration (MSWI) fly ash (FA). Recovery technologies included thermal separation (TS), chemical extraction (CE), bioleaching, and electrochemical processes. The reaction conditions of various methods, the efficiency of recovering HMs from MSWI FA and the difficulties and solutions in the process of technical development were studied. Evaluation of each process has also been done to determine the best HM recycling method and future challenges. Results showed that while bioleaching had minimal environmental impact, the process was time-consuming. TS and CE were the most mature technologies, but the former process was not cost-effective. Overall, it has the greatest economic potential to recover metals by CE with scrubber liquid produced by a wet air pollution control system. An electrochemical process or solvent extraction could then be applied to recover HMs from the enriched leachate. Ongoing development of TS and bioleaching technologies could reduce the treatment cost or time.

scholarly journals An Experimental Study on the Melting Solidification of Municipal Solid Waste Incineration Fly Ash

2021 ◽  
Vol 13 (2) ◽  
pp. 535
Author(s):  
Jing Gao ◽  
Tao Wang ◽  
Jie Zhao ◽  
Xiaoying Hu ◽  
Changqing Dong
Keyword(s):  
Heavy Metals ◽  
High Temperature ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Liquid Slag ◽  
Melting Process ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Mswi Fly Ash

Melting solidification experiments of municipal solid waste incineration (MSWI) fly ash were carried out in a high-temperature tube furnace device. An ash fusion temperature (AFT) test, atomic absorption spectroscopy (AAS), scanning electron microscope (SEM), and X-ray diffraction (XRD) were applied in order to gain insight into the ash fusibility, the transformation during the melting process, and the leaching behavior of heavy metals in slag. The results showed that oxide minerals transformed into gehlenite as temperature increased. When the temperature increased to 1300 °C, 89 °C higher than the flow temperature (FT), all of the crystals transformed into molten slag. When the heating temperatures were higher than the FT, the volatilization of the Pb, Cd, Zn, and Cu decreased, which may have been influenced by the formation of liquid slag. In addition, the formation of liquid slag at a high temperature also improved the stability of heavy metals in heated slag.

Alkali activation of biomass fly ash–metakaolin blends

Fuel ◽  
2012 ◽  
Vol 98 ◽  
pp. 265-271 ◽  
Author(s):  
Rejini Rajamma ◽  
João A. Labrincha ◽  
Victor M. Ferreira
Keyword(s):  
Fly Ash ◽  
Alkali Activation ◽  
Biomass Fly Ash

Characterization of MSWI fly ash through mineralogy and water extraction

2011 ◽  
Vol 55 (5) ◽  
pp. 524-534 ◽  
Author(s):  
Athanasius P. Bayuseno ◽  
Wolfgang W. Schmahl
Keyword(s):  
Fly Ash ◽  
Water Extraction ◽  
Mswi Fly Ash

Alkali activation of fly ash: Effect of the SiO2/Na2O ratio

2007 ◽  
Vol 106 (1-3) ◽  
pp. 180-191 ◽  
Author(s):  
M. Criado ◽  
A. Fernández-Jiménez ◽  
A. Palomo
Keyword(s):  
Fly Ash ◽  
Alkali Activation

Phase evolution of fly ash calcium constituent at early alkali activation reaction age

2016 ◽  
Vol 174 ◽  
pp. 175-179 ◽  
Author(s):  
Ningning Shao ◽  
Ze Liu ◽  
Jianjun Fan ◽  
Yu Zhou ◽  
Dongmin Wang
Keyword(s):  
Fly Ash ◽  
Phase Evolution ◽  
Alkali Activation ◽  
Activation Reaction

The hydration characteristics of MSWI fly ash slag present in C3S

2003 ◽  
Vol 33 (7) ◽  
pp. 957-964 ◽  
Author(s):  
K.L. Lin ◽  
K.S. Wang ◽  
T.Y. Lee ◽  
B.Y. Tzeng
Keyword(s):  
Fly Ash ◽  
Mswi Fly Ash ◽  
Hydration Characteristics

Characteristics of MSWI fly ash with acid leaching treatment

2021 ◽  
Vol 49 (8) ◽  
pp. 1208-1218
Author(s):  
Yi-nan CAO ◽  
Jin-jing LUO ◽  
Shi-qiang SUN
Keyword(s):  
Fly Ash ◽  
Acid Leaching ◽  
Mswi Fly Ash

Characteristics and leaching behavior of MSWI fly ash in novel solidification/stabilization binders

2021 ◽  
Vol 131 ◽  
pp. 277-285
Author(s):  
Chengcheng Fan ◽  
Baomin Wang ◽  
Yi Qi ◽  
Ze Liu
Keyword(s):  
Fly Ash ◽  
Leaching Behavior ◽  
Mswi Fly Ash
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