Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment
In the present work, Azadirachta indica (neem) leaves were converted to a powder for use in the separation of Cu(II) ions from water. The powdered biomass was investigated as a sorbent for Cu(II) ions employing pH, time, initial Cu(II) ion concentration and the amount of sorbent as the experimental...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2010-12-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.28.10.869 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841564458654105600 |
|---|---|
| author | Krishna Gopal Bhattacharyya Arunima Sarma Jyotirekha Sarma |
| author_facet | Krishna Gopal Bhattacharyya Arunima Sarma Jyotirekha Sarma |
| author_sort | Krishna Gopal Bhattacharyya |
| collection | DOAJ |
| description | In the present work, Azadirachta indica (neem) leaves were converted to a powder for use in the separation of Cu(II) ions from water. The powdered biomass was investigated as a sorbent for Cu(II) ions employing pH, time, initial Cu(II) ion concentration and the amount of sorbent as the experimental variables. At very low pH, Cu(II) ions were incapable of competing effectively with H + ions for the sorption sites, but at the natural pH (5.6) of the aqueous Cu(II) ion solution up to 90% of the Cu(II) ions could be separated by sorption onto 4 g of Azadirachta indica leaf powder (AILP) from an aqueous solution of 50 mg/ℓ concentration. The experimental data were well fitted by the Langmuir and Freundlich isotherm equations and followed pseudo-second-order kinetics. The Langmuir monolayer capacity of AILP for Cu(II) ions was 6.7–33.3 mg/g, which could be considered as reasonable. Azadirachta indica leaf powder could be a very effective sorbent for Cu(II) ions from an aqueous medium. The cellulosic units present in AILP provide a matrix of OH − , COO − , CN − and other anions that bind Cu(II) ions to the surface. The process was exothermic with ΔH 0 values of −96.1 kJ/mol to −105.4 kJ/mol, reflecting the strong Cu(II)–AILP linkages formed. This was supported by an appropriate increase in the standard entropy change and a decrease in the Gibbs' free energy. |
| format | Article |
| id | doaj-art-59da7e3f725b4e6399b2e289ce3ca466 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2010-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-59da7e3f725b4e6399b2e289ce3ca4662025-01-02T22:39:31ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382010-12-012810.1260/0263-6174.28.10.869Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water TreatmentKrishna Gopal Bhattacharyya0Arunima Sarma1Jyotirekha Sarma2 Department of Chemistry, Gauhati University, Guwahati 781014, Assam, India Department of Chemistry, Morigaon College, Morigaon 782105, Assam, India Department of Chemistry, Gauhati University, Guwahati 781014, Assam, IndiaIn the present work, Azadirachta indica (neem) leaves were converted to a powder for use in the separation of Cu(II) ions from water. The powdered biomass was investigated as a sorbent for Cu(II) ions employing pH, time, initial Cu(II) ion concentration and the amount of sorbent as the experimental variables. At very low pH, Cu(II) ions were incapable of competing effectively with H + ions for the sorption sites, but at the natural pH (5.6) of the aqueous Cu(II) ion solution up to 90% of the Cu(II) ions could be separated by sorption onto 4 g of Azadirachta indica leaf powder (AILP) from an aqueous solution of 50 mg/ℓ concentration. The experimental data were well fitted by the Langmuir and Freundlich isotherm equations and followed pseudo-second-order kinetics. The Langmuir monolayer capacity of AILP for Cu(II) ions was 6.7–33.3 mg/g, which could be considered as reasonable. Azadirachta indica leaf powder could be a very effective sorbent for Cu(II) ions from an aqueous medium. The cellulosic units present in AILP provide a matrix of OH − , COO − , CN − and other anions that bind Cu(II) ions to the surface. The process was exothermic with ΔH 0 values of −96.1 kJ/mol to −105.4 kJ/mol, reflecting the strong Cu(II)–AILP linkages formed. This was supported by an appropriate increase in the standard entropy change and a decrease in the Gibbs' free energy.https://doi.org/10.1260/0263-6174.28.10.869 |
| spellingShingle | Krishna Gopal Bhattacharyya Arunima Sarma Jyotirekha Sarma Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment Adsorption Science & Technology |
| title | Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment |
| title_full | Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment |
| title_fullStr | Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment |
| title_full_unstemmed | Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment |
| title_short | Adsorption of Cu(II) Ions onto a Cellulosic Biosorbent, Leaf Powder: Application in Water Treatment |
| title_sort | adsorption of cu ii ions onto a cellulosic biosorbent leaf powder application in water treatment |
| url | https://doi.org/10.1260/0263-6174.28.10.869 |
| work_keys_str_mv | AT krishnagopalbhattacharyya adsorptionofcuiiionsontoacellulosicbiosorbentleafpowderapplicationinwatertreatment AT arunimasarma adsorptionofcuiiionsontoacellulosicbiosorbentleafpowderapplicationinwatertreatment AT jyotirekhasarma adsorptionofcuiiionsontoacellulosicbiosorbentleafpowderapplicationinwatertreatment |