Low-cost Y-type zeolite/carbon porous composite from coal gasification fine slag and its application in the phenol removal from wastewater: fabrication, characterization, equilibrium, and kinetic studies

Abstract

A method is presented for preparing a Y-type zeolite/carbon composite with coal gasification fine slag for removing phenol in wastewater.

Mechanical activation of coal gasification fine slag and mechanical and thermal properties of coal gasification fine slag–poly(vinyl chloride) composites

“…The Barrett-Joyner-Halenda (BJH) desorption pore size distribution and N 2 adsorption/desorption isotherms of the CGFS samples activated using various mechanical activation methods are shown in figure 3, and the pore properties of the activated CGFS samples are listed in table 3. As can be seen from figure 3, the N 2 adsorption/ desorption isotherms of all the CGFS samples correspond to type-III isotherms in the International Union of Pure and Applied Chemistry isotherm classification [38], indicating the existence of a considerable amount of mesoporous pores in the CGFS samples after the activation treatment [39]. Moreover, with increasing mechanical activation time an increase in the specific surface area, pore volume, and average pore size of the CGFS samples was observed.…”

Upcycling endogenous Fe from coal gasification slag waste into a cocatalyst for the photocatalytic H2 evolution reaction

“…14–17 Alternatively, many studies have also explored the recovery of unburned carbon 18–20 as well as a series of Si and Al-based porous materials 21–26 from CGS via remediation methods, like physical flotation and chemical precipitation/extraction, which require post-treatment of CGS, the use of reagent-grade chemicals, and extensive electricity input, which are usually accompanied by high energy costs and large CO 2 emission. In the meantime, the production of high-quality carbon and silica products from CGS requires an additional acid leaching step to remove the naturally endogenous metal impurities, 27,28 which not only further increases the cost of mass production but also enhances the possibility of metal wastes entering natural water systems, resulting in serious diseases in humans. Therefore, developing an economically and environmentally viable strategy for directly upcycling CGS into a valuable material in place of energy- and CO 2 -intensive disposal is still highly desirable.…”

Mesoporous Spherical Silica Filler Prepared from Coal Gasification Fine Slag for Styrene Butadiene Rubber Reinforcement and Promoting Vulcanization

“…Based on the characteristics of coal gasification slag, different functions have been assigned to it by many researchers. Mesoporous silica [ 9 ] material, residual carbon adsorbent [ 10 ], and Y-type zeolite/carbon porous composites [ 11 ] were prepared by acid leaching, floating, and the hydrothermal synthesis method from CFS to absorb the organic pollutants in water. The maximum adsorption capacity of these materials was excellent, benefiting from their large specific surface area, high porosity, and chemical stability [ 12 ].…”