Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon
The adsorption of chromium(VI) from dilute aqueous solutions on to activated carbons at natural pH values was investigated. The activated carbons were modified to obtain materials with a well-defined surface containing inorganic impurities at ppb or ppm level. Measurements of the adsorption kinetics...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2000-03-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617001493314 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846097942847422464 |
|---|---|
| author | Ryszard Dobrowolski Elżbieta Stefaniak |
| author_facet | Ryszard Dobrowolski Elżbieta Stefaniak |
| author_sort | Ryszard Dobrowolski |
| collection | DOAJ |
| description | The adsorption of chromium(VI) from dilute aqueous solutions on to activated carbons at natural pH values was investigated. The activated carbons were modified to obtain materials with a well-defined surface containing inorganic impurities at ppb or ppm level. Measurements of the adsorption kinetics relative to the degree of granulation were undertaken. It was found that the reaction rate of the ions on the surface of the activated carbon rather than diffusion was the major process influencing the equilibrium. Surface reduction of Cr VI to Cr III appeared to be the principal mechanism for the adsorption of chromium on the activated carbons studied. It was demonstrated experimentally that the presence of oxidizing agents dramatically changed the adsorption capacity of Cr VI on the studied carbons. The influence of the ionic strength (controlled by the addition of NaCl) on the adsorption capacity was also studied. Variable and complex influences of the ionic strength on the adsorption capacity were observed. |
| format | Article |
| id | doaj-art-e972a8d40f764bd4bb913980c84923d7 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2000-03-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-e972a8d40f764bd4bb913980c84923d72025-01-02T02:58:11ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382000-03-011810.1260/0263617001493314Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated CarbonRyszard Dobrowolski0Elżbieta Stefaniak1 Analytical Laboratory, Faculty of Chemistry, Maria Curie-Sklodowska University, pl. Marii Curie-Sklodowskiej 3, 20-031 Lublin, Poland Department of Chemistry, Catholic University of Lublin, al. Kraśnicka 102, 20-718 Lublin, PolandThe adsorption of chromium(VI) from dilute aqueous solutions on to activated carbons at natural pH values was investigated. The activated carbons were modified to obtain materials with a well-defined surface containing inorganic impurities at ppb or ppm level. Measurements of the adsorption kinetics relative to the degree of granulation were undertaken. It was found that the reaction rate of the ions on the surface of the activated carbon rather than diffusion was the major process influencing the equilibrium. Surface reduction of Cr VI to Cr III appeared to be the principal mechanism for the adsorption of chromium on the activated carbons studied. It was demonstrated experimentally that the presence of oxidizing agents dramatically changed the adsorption capacity of Cr VI on the studied carbons. The influence of the ionic strength (controlled by the addition of NaCl) on the adsorption capacity was also studied. Variable and complex influences of the ionic strength on the adsorption capacity were observed.https://doi.org/10.1260/0263617001493314 |
| spellingShingle | Ryszard Dobrowolski Elżbieta Stefaniak Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon Adsorption Science & Technology |
| title | Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon |
| title_full | Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon |
| title_fullStr | Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon |
| title_full_unstemmed | Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon |
| title_short | Study of Chromium(VI) Adsorption from Aqueous Solution on to Activated Carbon |
| title_sort | study of chromium vi adsorption from aqueous solution on to activated carbon |
| url | https://doi.org/10.1260/0263617001493314 |
| work_keys_str_mv | AT ryszarddobrowolski studyofchromiumviadsorptionfromaqueoussolutionontoactivatedcarbon AT elzbietastefaniak studyofchromiumviadsorptionfromaqueoussolutionontoactivatedcarbon |