Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash

Zhuannian Liu; Yuan Liu

doi:10.1016/j.cjche.2014.09.037

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Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash

能源、资源与环境技术 | Updated：2026-01-06

- Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash
- Chinese Journal of Chemical Engineering Vol. 23, Issue 1, Pages: 290-295(2015)
- Affiliations：
  
  2 School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology,Xi'an,China,710054
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.09.037
  CLC：
- Published：2015
- Accepted：
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Zhuannian Liu, Yuan Liu. Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash[J]. Chin.J.Chem.Eng., 2015, 23(1): 290-295.
DOI：

Zhuannian Liu, Yuan Liu. Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash[J]. Chin.J.Chem.Eng., 2015, 23(1): 290-295. DOI： 10.1016/j.cjche.2014.09.037.

摘要

Abstract

In this paper

different particle sizes of coal fly ash FA-R (D

= 15.75 μm)

FA-A (D

= 3.61 μm) and FA-B (D

= 1.73 μm) were treated with NaOH solution to prepare the forming adsorbents FFA-R

FFA-A and FFA-B. The structure and adsorption properties of the forming adsorbents for methylene blue (MB) from aqueous solution were examined. The results showed that the specific surface areas and adsorption capacities of the forming adsorbent for MB increased with decreasing particle size of raw coal fly ashes. The adsorption kinetic data of MB on FFA-R

FFA-A and FFA-B fitted the second-order kinetic model very well with the rate constants (k

) of 3.15 × 10

-2

3.84×10

-2

and 6.27 × 10

-2

g·mg

-1

·min

-1

respectively. The adsorption processwas not only controlled by intra-particle diffusion. The isotherms of MB on FFA-R

FFA-A and FFA-B can be described by the Langmuir isotherm and the Freundlich isotherm

and the adsorption processes were spontaneous and exothermic.

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