The thermodynamics of metal ions from stainless steel pickling wastewater on strong-acid cation exchange resin

Author

Li, Fei ; Zhao, Jun-xue ; Ma, Hong-zhou ; Zeng, Yuan ; Li, Xiao-ming

Author_Institution

Sch. of Metall. Eng., Xi´´an Univ. of Archit. & Technol., Xi´´an, China

fYear

2011

fDate

24-26 June 2011

Firstpage

7987

Lastpage

7991

Abstract

The adsorption behavior of Cr³⁺ and Fe³⁺ on 001×7 strong-acid cation exchange resin was studied with the static method, respectively getting Adsorption Isotherms of Resin 001×7 for Cr³⁺ and Fe³⁺. The experimental results show that, in the studied concentration range, the equilibrium adsorption data of Cr³⁺ fit to Langmiur isotherms, while Fe³⁺ fitting to Frendlich isotherms. Kinetic analysis show that the adsorption rate of Cr³⁺ is mainly governed by liquid film diffusion and the rate of Fe³⁺ is governed by Particle diffusion. In addition, the thermodynamic parameters were obtained from analyzed dynamics data and thermodynamic function. The conclusion indicates that the adsorption gets more orderly and is an exothermic process running spontaneously, so that higher temperature is bad for the reaction.

Keywords

chromium; iron; metallurgy; resins; stainless steel; thermodynamics; wastewater; wastewater treatment; Cr³⁺; Fe³⁺; Frendlich isotherm; adsorption behavior; exothermic process; kinetic analysis; liquid film diffusion; metal ion thermodynamics; particle diffusion; stainless steel pickling wastewater; strong-acid cation exchange resin; Iron; Kinetic theory; Mathematical model; Resins; Steel; Thermodynamics; Wastewater; Chromium; Ferrum; Strong-acid cation exchange resin; stainless steel plicking wastewater; thermodynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-9172-8

Type

conf

DOI

10.1109/RSETE.2011.5966303

Filename

5966303