Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies
Abstract The present study attempted to analyze the biosorption behavior of novel biosorbent, Araucaria heterophylla (green plant) biomass, to remove Cd+2 from solutions against various parameters, i.e., initial metal ion concentration, pH, temperature, sorbent dosage and biomass particle size. The...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-09-01
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| Series: | Applied Water Science |
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| Online Access: | http://link.springer.com/article/10.1007/s13201-017-0618-1 |
| _version_ | 1819016868466262016 |
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| author | B. Sarada M. Krishna Prasad K. Kishore Kumar Ch V. R. Murthy |
| author_facet | B. Sarada M. Krishna Prasad K. Kishore Kumar Ch V. R. Murthy |
| author_sort | B. Sarada |
| collection | DOAJ |
| description | Abstract The present study attempted to analyze the biosorption behavior of novel biosorbent, Araucaria heterophylla (green plant) biomass, to remove Cd+2 from solutions against various parameters, i.e., initial metal ion concentration, pH, temperature, sorbent dosage and biomass particle size. The maximum biosorption was found to be 90.02% at pH 5.5 and biosorption capacity (q e) of Cd+2 is 9.2506 mg g−1. The Langmuir and Freundlich equilibrium adsorption isotherms were studied and it was observed that Freundlich model is the best fit than the Langmuir model with correlation co-efficient of 0.999. Kinetic studies indicated that the biosorption process of Cd+2 well followed the pseudo-second-order model with R 2 0.999. Thermodynamic studies observed that the process is exothermic (ΔH ° negative). Free energy change (ΔG °) with negative sign reflected the feasibility and spontaneous nature of the process. The chemical functional –OH groups, CH2 stretching vibrations, C=O carbonyl group of alcohol, C=O carbonyl group of amide, P=O stretching vibrations and –CH groups were involved in the biosorption process. The XRD pattern of the A. heterophylla was found to be mostly amorphous in nature. The SEM studies showed Cd+2 biosorption on selective grains of the biosorbent. It was concluded that A. heterophylla leaf powder can be used as an effective, low-cost, and environmentally friendly biosorbent for the removal of Cd+2 from aqueous solution. Graphical Abstract |
| first_indexed | 2024-12-21T02:54:28Z |
| format | Article |
| id | doaj.art-6810de3d0cad4361a315340ad199dfd8 |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-12-21T02:54:28Z |
| publishDate | 2017-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-6810de3d0cad4361a315340ad199dfd82022-12-21T19:18:22ZengSpringerOpenApplied Water Science2190-54872190-54952017-09-01773483349610.1007/s13201-017-0618-1Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studiesB. Sarada0M. Krishna Prasad1K. Kishore Kumar2Ch V. R. Murthy3Department of Biotechnology, GITAM UniversityDepartment of Chemical Engineering, GMR Institute of TechnologyDepartment of Chemical Engineering, University College of Engineering (A), Andhra UniversityDepartment of Chemical Engineering, University College of Engineering (A), Andhra UniversityAbstract The present study attempted to analyze the biosorption behavior of novel biosorbent, Araucaria heterophylla (green plant) biomass, to remove Cd+2 from solutions against various parameters, i.e., initial metal ion concentration, pH, temperature, sorbent dosage and biomass particle size. The maximum biosorption was found to be 90.02% at pH 5.5 and biosorption capacity (q e) of Cd+2 is 9.2506 mg g−1. The Langmuir and Freundlich equilibrium adsorption isotherms were studied and it was observed that Freundlich model is the best fit than the Langmuir model with correlation co-efficient of 0.999. Kinetic studies indicated that the biosorption process of Cd+2 well followed the pseudo-second-order model with R 2 0.999. Thermodynamic studies observed that the process is exothermic (ΔH ° negative). Free energy change (ΔG °) with negative sign reflected the feasibility and spontaneous nature of the process. The chemical functional –OH groups, CH2 stretching vibrations, C=O carbonyl group of alcohol, C=O carbonyl group of amide, P=O stretching vibrations and –CH groups were involved in the biosorption process. The XRD pattern of the A. heterophylla was found to be mostly amorphous in nature. The SEM studies showed Cd+2 biosorption on selective grains of the biosorbent. It was concluded that A. heterophylla leaf powder can be used as an effective, low-cost, and environmentally friendly biosorbent for the removal of Cd+2 from aqueous solution. Graphical Abstracthttp://link.springer.com/article/10.1007/s13201-017-0618-1BiosorptionAraucaria heterophyllaKineticsCadmium(II)FTIRSEM |
| spellingShingle | B. Sarada M. Krishna Prasad K. Kishore Kumar Ch V. R. Murthy Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies Applied Water Science Biosorption Araucaria heterophylla Kinetics Cadmium(II) FTIR SEM |
| title | Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies |
| title_full | Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies |
| title_fullStr | Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies |
| title_full_unstemmed | Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies |
| title_short | Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies |
| title_sort | biosorption of cd 2 by green plant biomass araucaria heterophylla characterization kinetic isotherm and thermodynamic studies |
| topic | Biosorption Araucaria heterophylla Kinetics Cadmium(II) FTIR SEM |
| url | http://link.springer.com/article/10.1007/s13201-017-0618-1 |
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