| Home | E-Submission | Sitemap | Contact Us |  
Environmental Engineering Research 2003;8(2): 91-97. DOI: https://doi.org/10.4491/eer.2003.8.2.091
SURFACE COMPLEXATION MODELS FOR COPPER(II) ADSORPTION ON KAOLINITE
Soo Bin Yim
School of Urban and Civil Engineering Hongik University, Seoul 121-791, Korea
Corresponding Author: Soo Bin Yim ,Tel: +82-2325-8815, Fax: +82-2325-8815, Email: ysb9643@hotmail.com
Received: November 15, 2002;  Accepted: March 11, 2003.
Share :  
ABSTRACT
Adsorption experiments of Cu(ll) to kaolinite were conducted to investigate the adsorption behavior of Cu(ll) at a variety of aqueous conditions. Three electrostatic surface complexation models (i.e., Constant Capacitance Model (CCM), Diffuse Layer Model (DLM), and Triple Layer Model (TLM)) were used to simulate and predict the adsorption behavior of Cu(II) to kaolinite using MINTEQA2 program. The experimental data for adsorption edges of Cu(II) to kaolinite were compared to the modeling results predicted by surface complex models. The TLM among three surface complexation models showed excellent fitting results for Cu(ll) adsorption data. These results suggest that TLM surface complexation model can successfully describe the adsorption behavior of Cu(II) to kaolinite. The speciation of copper ion at different pH conditions was calculated to investigate the dominant Cu ion species that lead to Cu(ll) adsorption to kaolinite. The dominant species that caused the Cu(II) adsorption to kaolinite were AKK'u . =AIOHCu" and (AlOi.-Cu for CCM and DLM, and AlOCuOH. AKK'u . and AlOIICif for TLM. The aluminol sites (sAIOH) of kaolinite may have much stronger affinity of Cu(Il) adsorption than silanol sites ( ^SiOH). The hydrolytic complexes of Cu(II) on the kaolinite surfaces can be of much importance in Cu(Il) adsorption to kaolinite.
Keywords: adsorption | constant capacitance model | copper(ll) | diffuse layer model | kaolinite | surface complexation model | triple layer model
TOOLS
PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
  E-Mail
Share:      
METRICS
2
Crossref
0
Scopus
1,129
View
5
Download
REMOVAL OF COPPER(II) ION BY KAOLIN IN AQUEOUS SOLUTIONS  2002 March;7(1)
Editorial Office
464 Cheongpa-ro, #726, Jung-gu, Seoul 04510, Republic of Korea
TEL : +82-2-383-9697   FAX : +82-2-383-9654   E-mail : eer@kosenv.or.kr

Copyright© Korean Society of Environmental Engineers. All rights reserved.        Developed in M2community
About |  Browse Articles |  Current Issue |  For Authors and Reviewers