Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution
Watermelon rind (WR) an agro waste was evaluated as an adsorbent for the removal of Cr3+ ions from aqueous solution. Batch mode adsorption studies were performed by varying parameters such as pH, contact time, adsorbent dose and initial metal ion concentration. Maximum loading capacity of WR was fou...
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| Format: | Article |
| Language: | English |
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Elsevier
2014-12-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S111001681400074X |
| _version_ | 1818647735622959104 |
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| author | Nimmala Anvesh Reddy R. Lakshmipathy N.C. Sarada |
| author_facet | Nimmala Anvesh Reddy R. Lakshmipathy N.C. Sarada |
| author_sort | Nimmala Anvesh Reddy |
| collection | DOAJ |
| description | Watermelon rind (WR) an agro waste was evaluated as an adsorbent for the removal of Cr3+ ions from aqueous solution. Batch mode adsorption studies were performed by varying parameters such as pH, contact time, adsorbent dose and initial metal ion concentration. Maximum loading capacity of WR was found to be 172.6 mg g−1 for Cr3+ ions at pH 3. Kinetic studies show that removal of Cr3+ ions is rapid and follows a pseudosecond order model. Equilibrium data fit better with the Langmuir isotherm than the Freundlich isotherm. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were derived for the current system. The negative values of ΔG° show that the nature of sorption process is spontaneous. FTIR studies reveal that hydroxyl and carboxyl groups were responsible for uptake of metal ions. Successive desorption of Cr3+ ions reveals that WR can be an economical sorbent for the removal of heavy metals from aqueous solution. The results conclude that watermelon rind an agro waste can effectively be used for the removal of chromium ions from aqueous solution. |
| first_indexed | 2024-12-17T01:07:16Z |
| format | Article |
| id | doaj.art-b1e207dd54c6463fa7a8bdf77f0f5a3e |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-12-17T01:07:16Z |
| publishDate | 2014-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-b1e207dd54c6463fa7a8bdf77f0f5a3e2022-12-21T22:09:15ZengElsevierAlexandria Engineering Journal1110-01682014-12-0153496997510.1016/j.aej.2014.07.006Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solutionNimmala Anvesh ReddyR. LakshmipathyN.C. SaradaWatermelon rind (WR) an agro waste was evaluated as an adsorbent for the removal of Cr3+ ions from aqueous solution. Batch mode adsorption studies were performed by varying parameters such as pH, contact time, adsorbent dose and initial metal ion concentration. Maximum loading capacity of WR was found to be 172.6 mg g−1 for Cr3+ ions at pH 3. Kinetic studies show that removal of Cr3+ ions is rapid and follows a pseudosecond order model. Equilibrium data fit better with the Langmuir isotherm than the Freundlich isotherm. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were derived for the current system. The negative values of ΔG° show that the nature of sorption process is spontaneous. FTIR studies reveal that hydroxyl and carboxyl groups were responsible for uptake of metal ions. Successive desorption of Cr3+ ions reveals that WR can be an economical sorbent for the removal of heavy metals from aqueous solution. The results conclude that watermelon rind an agro waste can effectively be used for the removal of chromium ions from aqueous solution.http://www.sciencedirect.com/science/article/pii/S111001681400074XWatermelon rindChromiumAdsorptionKineticsIsotherms |
| spellingShingle | Nimmala Anvesh Reddy R. Lakshmipathy N.C. Sarada Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution Alexandria Engineering Journal Watermelon rind Chromium Adsorption Kinetics Isotherms |
| title | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| title_full | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| title_fullStr | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| title_full_unstemmed | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| title_short | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| title_sort | application of citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution |
| topic | Watermelon rind Chromium Adsorption Kinetics Isotherms |
| url | http://www.sciencedirect.com/science/article/pii/S111001681400074X |
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