The use of Neem biomass for the biosorption of zinc from aqueous solutions
(2008) In Journal of Hazardous Materials 157(2-3). p.534-540- Abstract
- An adsorbent was developed from mature leaves and stem bark of the Neem (Azadirachta indica) tree for removing zinc from water. Adsorption was carried out in a batch process with several different concentrations of zinc by varying pH. The uptake of metal was very fast initially, but gradually slowed down indicating penetration into the interior of the adsorbent particles. The data showed that optimum pH for efficient biosorption of zinc by Neem leaves and stem bark was 4 and 5, respectively. The maximum adsorption capacity showed that the Neem biomass had a mass capacity for zinc (147.08 mg Zn/g for Neem leaves and 137.67 mg Zn/g Neem bark). The experimental results were analyzed in terms of Langmuir and Freundlich isotherms. The... (More)
- An adsorbent was developed from mature leaves and stem bark of the Neem (Azadirachta indica) tree for removing zinc from water. Adsorption was carried out in a batch process with several different concentrations of zinc by varying pH. The uptake of metal was very fast initially, but gradually slowed down indicating penetration into the interior of the adsorbent particles. The data showed that optimum pH for efficient biosorption of zinc by Neem leaves and stem bark was 4 and 5, respectively. The maximum adsorption capacity showed that the Neem biomass had a mass capacity for zinc (147.08 mg Zn/g for Neem leaves and 137.67 mg Zn/g Neem bark). The experimental results were analyzed in terms of Langmuir and Freundlich isotherms. The adsorption followed pseudo-second-order kinetic model. The thermodynamic assessment of the metal ion-Neem tree biomass system indicated the feasibility and spontaneous nature of the process and Delta G degrees values were evaluated as ranging from -26.84 to -32.75 (Neem leaves) kJ/mol and -26.04 to -29.50 (Neem bark) kJ/mol for zinc biosorption. Due to its outstanding zinc uptake capacity, the Neem tree was proved to be an excellent biomaterial for accumulating zinc from aqueous solutions. (C) 2008 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1252795
- author
- Arshad, Mamoona ; Zafar, MNadeem LU ; Younis, Sadaf and Nadeem, Raziya
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- waste water, zinc, biosorption, Neem, kinetics, Gibbs free energy
- in
- Journal of Hazardous Materials
- volume
- 157
- issue
- 2-3
- pages
- 534 - 540
- publisher
- Elsevier
- external identifiers
-
- wos:000258425900041
- scopus:46449084616
- ISSN
- 1873-3336
- DOI
- 10.1016/j.jhazmat.2008.01.017
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- 063db245-162d-48c0-86a8-dfebe4d48af6 (old id 1252795)
- date added to LUP
- 2016-04-01 11:40:22
- date last changed
- 2022-04-28 18:17:08
@article{063db245-162d-48c0-86a8-dfebe4d48af6, abstract = {{An adsorbent was developed from mature leaves and stem bark of the Neem (Azadirachta indica) tree for removing zinc from water. Adsorption was carried out in a batch process with several different concentrations of zinc by varying pH. The uptake of metal was very fast initially, but gradually slowed down indicating penetration into the interior of the adsorbent particles. The data showed that optimum pH for efficient biosorption of zinc by Neem leaves and stem bark was 4 and 5, respectively. The maximum adsorption capacity showed that the Neem biomass had a mass capacity for zinc (147.08 mg Zn/g for Neem leaves and 137.67 mg Zn/g Neem bark). The experimental results were analyzed in terms of Langmuir and Freundlich isotherms. The adsorption followed pseudo-second-order kinetic model. The thermodynamic assessment of the metal ion-Neem tree biomass system indicated the feasibility and spontaneous nature of the process and Delta G degrees values were evaluated as ranging from -26.84 to -32.75 (Neem leaves) kJ/mol and -26.04 to -29.50 (Neem bark) kJ/mol for zinc biosorption. Due to its outstanding zinc uptake capacity, the Neem tree was proved to be an excellent biomaterial for accumulating zinc from aqueous solutions. (C) 2008 Elsevier B.V. All rights reserved.}}, author = {{Arshad, Mamoona and Zafar, MNadeem and Younis, Sadaf and Nadeem, Raziya}}, issn = {{1873-3336}}, keywords = {{waste water; zinc; biosorption; Neem; kinetics; Gibbs free energy}}, language = {{eng}}, number = {{2-3}}, pages = {{534--540}}, publisher = {{Elsevier}}, series = {{Journal of Hazardous Materials}}, title = {{The use of Neem biomass for the biosorption of zinc from aqueous solutions}}, url = {{http://dx.doi.org/10.1016/j.jhazmat.2008.01.017}}, doi = {{10.1016/j.jhazmat.2008.01.017}}, volume = {{157}}, year = {{2008}}, }