Adsorption of some heavy metal ions on sulfate- and phosphate-modified Kaolin
| dc.contributor.author | Unuabonah, Emmanuel | |
| dc.date.accessioned | 2022-05-06T11:55:55Z | |
| dc.date.available | 2022-05-06T11:55:55Z | |
| dc.date.issued | 2004 | |
| dc.description.abstract | Kaolin (bright white lumps) from Ubulu-Ukwu in Delta State of Nigeria was modified with 200 µg mL-1 of phosphate and sulphate anions to give phosphate- and sulfate-modified adsorbents, respectively. The adsorption of four metal ions (Pb2+, Cd2+, Zn2+, and Cu2+) was studied as a function of metal ions concentration. The metal ions showed stronger affinity for the phosphate-modified adsorbent with Pb2+, Cu2+, Zn2+, and Cd2+ giving an average of 93.28%, 80.94%, 68.99%, and 61.44% uptake capacity. The order of preference for the various adsorbents shown by the metal ions was as follows: Pb2+>Cu2+>Zn2+>Cd2+. Desorption studies showed that the phosphate-modified adsorbent had the highest affinity for the metal ions, followed by the sulfate-modified clay while the unmodified clay had the least affinity. The experimental data were fitted by both the Langmuir and Freundlich models | en_US |
| dc.identifier.uri | http://dspace.run.edu.ng:8080/jspui/handle/123456789/2755 | |
| dc.language.iso | en | en_US |
| dc.publisher | Elsevier | en_US |
| dc.subject | Kaolin; | en_US |
| dc.subject | Heavy metal ions; | en_US |
| dc.subject | Adsorption | en_US |
| dc.title | Adsorption of some heavy metal ions on sulfate- and phosphate-modified Kaolin | en_US |
| dc.type | Article | en_US |