Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures
The development of hydroxyapatite nanorods (nHAp) and hydroxyapatite/chitosan nanocomposite (nHApCs) was sought as potential sorbents for the removal of lead ions from aqueous lead-containing solutions in a batch adsorption experiment. The high resolution transmission electron microscopy, energy dis...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-07-01
|
| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535214003669 |
| _version_ | 1819195195475886080 |
|---|---|
| author | Ahmad M. Mohammad Taher A. Salah Eldin Mohamed A. Hassan Bahgat E. El-Anadouli |
| author_facet | Ahmad M. Mohammad Taher A. Salah Eldin Mohamed A. Hassan Bahgat E. El-Anadouli |
| author_sort | Ahmad M. Mohammad |
| collection | DOAJ |
| description | The development of hydroxyapatite nanorods (nHAp) and hydroxyapatite/chitosan nanocomposite (nHApCs) was sought as potential sorbents for the removal of lead ions from aqueous lead-containing solutions in a batch adsorption experiment. The high resolution transmission electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Fourier transform infrared spectrophotometry and Zeta potential measurements were all combined to reveal the morphology, composition, crystal structure, functionality and stability of the prepared sorbents. The equilibrium concentration of Pb2+ ions was identified by the atomic absorption spectrophotometry. The kinetics of the sorption process was investigated together with the influence of initial lead ions concentration, sorbent dosage and solution pH on the sorption capacity. The sorption process followed pseudo-second-order kinetics, where 20 min was quite enough to attain equilibrium. Two models of adsorption isotherms (Freundlich and Langmuir) were employed to correlate the data in order to understand the adsorption mechanism. Interestingly, in one of the experiments, for a 200 mL solution (pH = 5.6) containing 100 ppm lead ions, a sorbent dosage of 0.4 g nHAp could achieve a complete removal for lead ions. However, typically, the sorption capacities of nHAp and nHApCs to lead ions were 180 and 190 mg/g respectively, which appear excellent for lead removal. |
| first_indexed | 2024-12-23T02:08:54Z |
| format | Article |
| id | doaj.art-77c84094ba7f4a5c95c34dc9f59cf68d |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-23T02:08:54Z |
| publishDate | 2017-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-77c84094ba7f4a5c95c34dc9f59cf68d2022-12-21T18:03:49ZengElsevierArabian Journal of Chemistry1878-53522017-07-0110568369010.1016/j.arabjc.2014.12.016Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructuresAhmad M. Mohammad0Taher A. Salah Eldin1Mohamed A. Hassan2Bahgat E. El-Anadouli3Chemistry Department, Faculty of Science, Cairo University, PO 12613 Giza, EgyptNanotechnology and Advanced Materials Central Lab, Agriculture Research Center, Giza, EgyptNanotechnology and Advanced Materials Central Lab, Agriculture Research Center, Giza, EgyptChemistry Department, Faculty of Science, Cairo University, PO 12613 Giza, EgyptThe development of hydroxyapatite nanorods (nHAp) and hydroxyapatite/chitosan nanocomposite (nHApCs) was sought as potential sorbents for the removal of lead ions from aqueous lead-containing solutions in a batch adsorption experiment. The high resolution transmission electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Fourier transform infrared spectrophotometry and Zeta potential measurements were all combined to reveal the morphology, composition, crystal structure, functionality and stability of the prepared sorbents. The equilibrium concentration of Pb2+ ions was identified by the atomic absorption spectrophotometry. The kinetics of the sorption process was investigated together with the influence of initial lead ions concentration, sorbent dosage and solution pH on the sorption capacity. The sorption process followed pseudo-second-order kinetics, where 20 min was quite enough to attain equilibrium. Two models of adsorption isotherms (Freundlich and Langmuir) were employed to correlate the data in order to understand the adsorption mechanism. Interestingly, in one of the experiments, for a 200 mL solution (pH = 5.6) containing 100 ppm lead ions, a sorbent dosage of 0.4 g nHAp could achieve a complete removal for lead ions. However, typically, the sorption capacities of nHAp and nHApCs to lead ions were 180 and 190 mg/g respectively, which appear excellent for lead removal.http://www.sciencedirect.com/science/article/pii/S1878535214003669Adsorption isothermWastewater treatmentLead removalHydroxyapatiteChitosan |
| spellingShingle | Ahmad M. Mohammad Taher A. Salah Eldin Mohamed A. Hassan Bahgat E. El-Anadouli Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures Arabian Journal of Chemistry Adsorption isotherm Wastewater treatment Lead removal Hydroxyapatite Chitosan |
| title | Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures |
| title_full | Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures |
| title_fullStr | Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures |
| title_full_unstemmed | Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures |
| title_short | Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures |
| title_sort | efficient treatment of lead containing wastewater by hydroxyapatite chitosan nanostructures |
| topic | Adsorption isotherm Wastewater treatment Lead removal Hydroxyapatite Chitosan |
| url | http://www.sciencedirect.com/science/article/pii/S1878535214003669 |
| work_keys_str_mv | AT ahmadmmohammad efficienttreatmentofleadcontainingwastewaterbyhydroxyapatitechitosannanostructures AT taherasalaheldin efficienttreatmentofleadcontainingwastewaterbyhydroxyapatitechitosannanostructures AT mohamedahassan efficienttreatmentofleadcontainingwastewaterbyhydroxyapatitechitosannanostructures AT bahgateelanadouli efficienttreatmentofleadcontainingwastewaterbyhydroxyapatitechitosannanostructures |