Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent

Widi Astuti; Achmad Chafidz; Ahmed S. Al-Fatesh; Anis H. Fakeeha

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Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent

Resources and Environmental Technology | Updated：2026-01-06

- Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent
- Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent
- 中国化学工程学报（英文版） 2021年34卷第6期页码：289-298
- Affiliations：
  
  1. Chemical Engineering Department, Universitas Negeri Semarang, Semarang,Indonesia,50229
  2. Chemical Engineering Department, Universitas Islam Indonesia, Yogyakarta,Indonesia,55584
  3. Center for Material Science and Technology Studies, Chemical Engineering Department, Universitas Islam Indonesia, Yogyakarta,Indonesia,55584
  4. Chemical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia
- Author bio：
- Funds：
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  中图分类号：
- 纸质出版：2021
- Accepted：
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Widi Astuti, Achmad Chafidz, Ahmed S. Al-Fatesh, 等. Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent[J]. 中国化学工程学报（英文版）, 2021,34(6):289-298.

Widi Astuti, Achmad Chafidz, Ahmed S. Al-Fatesh, Anis H. Fakeeha. Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent[J]. Chinese Journal of Chemical Engineering, 2021, 34(6): 289-298.
Widi Astuti, Achmad Chafidz, Ahmed S. Al-Fatesh, 等. Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent[J]. 中国化学工程学报（英文版）, 2021,34(6):289-298. DOI：

Widi Astuti, Achmad Chafidz, Ahmed S. Al-Fatesh, Anis H. Fakeeha. Removal of lead (Pb(II)) and zinc (Zn(II)) from aqueous solution using coal fly ash (CFA) as a dual-sites adsorbent[J]. Chinese Journal of Chemical Engineering, 2021, 34(6): 289-298. DOI：

摘要

Abstract

Coal fly ash (CFA) is composed of minerals containing some oxides in crystalline phase (

i.e

quartz and mullite)

as well as unburned carbon as mesoporous material

thus enabling CFA to act as a dual-sites adsorbent with unique properties. This work focused on the adsorption of Pb(II) and Zn(II) from binary system

a mixture containing two metal ion solutions present simultaneously

onto NaOH-modified CFA (MCFA). Several adsorption tests were conducted to evaluate the effect of several parameters

including pH and contact times. The experiment results indicated that chemical treatment of CFA with NaOH increased pore volume from 0.021 to 0.223 cm

·g

-1

. In addition

it could also enhance the availability of functional groups on both minerals and unburned carbon

resulting in almost 100% Pb(II) and 97% Zn(II) adsorbed. The optimum pH for adsorption system was pH = 3 and quasi-equilibrium occurred in 240 minutes. Equilibrium data from the experimental results were analyzed using Modified Extended Langmuir (MEL) and Competitive Adsorption Langmuir-Langmuir (CALL) isotherm models. The analysis results showed that the CALL isotherm model could

better describe the Pb(II) and Zn(II) adsorption process onto MCFA in binary system compared with MEL isotherm model.

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