Isotherm Equation Study of F Adsorbed from Water Solution by Fe2(SO4)3-modified Granular Activated Alumina

党丹; 丁文明; 程安国; 刘书明; 张旭

doi:10.1016/S1004-9541(11)60025-6

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Isotherm Equation Study of F Adsorbed from Water Solution by Fe₂(SO₄)₃-modified Granular Activated Alumina

Updated：2026-01-06

- Isotherm Equation Study of F Adsorbed from Water Solution by Fe₂(SO₄)₃-modified Granular Activated Alumina
- Chinese Journal of Chemical Engineering Vol. 19, Issue 4, Pages: 581-585(2011)
- Affiliations：
  
  1. College of Chemical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
  2. School of Environment, Tsinghua University,Beijing,China,100084
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(11)60025-6
  CLC：
- Published：2011
- Accepted：
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(SO DOI： 10.1016/S1004-9541(11)60025-6.

摘要

Abstract

The adsorption equilibrium of a fluoride solution on 1-2 mm granular activated alumina modified by Fe

(SO

)

-solution was investigated.The experiments were conducted using a wide range of initial fluoride concentrations(0.5 to 180 mg·L

-1

at pH～7.0) and an adsorbent dose of 1.0 g·L

-1

.The application of Langmuir and Freundlich adsorption isotherm models(linear and nonlinear forms) generally showed that a single Langmuir or Freundlich equation cannot fit the entire concentration gap.Experimental data on low equilibrium concentrations(0.1 to 5.0 mg·L

-1

) was in line with both Langmuir and Freundlich isotherm models

whereas that of high equilibrium concentrations(5.0 to 150 mg·L

-1

) was more in line with the Freundlich isotherm model.A new LangmuirFreundlich function was used for the entire concentration gap

as well as for low and high concentrations.

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