Biosorption of heavy metals from aqueous solutions onto chitin
| Title: | Biosorption of heavy metals from aqueous solutions onto chitin |
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| Authors: | Nematollah Jaafarzadeh, Nezamaddin Mengelizadeh, Afshin Takdastan, Mohammad Heidari Farsani, Noureddin Niknam, Mohammadreza Aalipour, Mostafa Hadei, Parvaneh Bahrami |
| Source: | International Journal of Environmental Health Engineering, Vol 4, Iss 1, Pp 7-7 (2015) |
| Publisher Information: | Wolters Kluwer Medknow Publications, 2015. |
| Publication Year: | 2015 |
| Collection: | LCC:Environmental technology. Sanitary engineering LCC:Environmental engineering LCC:Environmental sciences |
| Subject Terms: | Biosorption, chitin, heavy metal, isotherm, kinetic, Environmental technology. Sanitary engineering, TD1-1066, Environmental engineering, TA170-171, Environmental sciences, GE1-350 |
| More Details: | Aims: This study investigates the potential of chitin shrimp shells for the removal of arsenic (V) and zinc (II) ions from aqueous solutions. Materials and Methods: In this study, the chitin was extracted from shrimp shells for arsenate and zinc ions removal from aqueous solutions. The effects of pH, adsorbent dosage, contact time and initial metal ion concentration on As (V) and Zn (II) removal were investigated in a batch system. Results: The equilibrium data were described using the Langmuir and Freundlich isotherm models. The Langmuir equation was used to find the maximum adsorption capacity for arsenate (11.574 mg/g) and Zn (270.27 mg/g). Biosorption was found to depend significantly on the pH of the solution and is optimal at pH values of 4 and 7. To determine the rate-controlling mechanism for metallic ion adsorption, pseudo-first-order and pseudo-second-order equation kinetic models were tested with experimental adsorption kinetic data. Modeling results revealed that As (V) and Zn (II) kinetics data were successfully described using pseudo-first and second-order models, respectively. FTIR analyses showed that hydroxyl and carboxyl groups could be very effective for capturing these metals. Conclusion: Results showed that the chitin is a good adsorbent for the removal of arsenate and zinc ions from aqueous solutions. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2277-9183 |
| Relation: | http://www.ijehe.org/article.asp?issn=2277-9183;year=2015;volume=4;issue=1;spage=7;epage=7;aulast=Jaafarzadeh; https://doaj.org/toc/2277-9183 |
| DOI: | 10.4103/2277-9183.153992 |
| Access URL: | https://doaj.org/article/80791830e7504d84bfe33525a49ffca2 |
| Accession Number: | edsdoj.80791830e7504d84bfe33525a49ffca2 |
| Database: | Directory of Open Access Journals |
| ISSN: | 22779183 |
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| DOI: | 10.4103/2277-9183.153992 |
| Published in: | International Journal of Environmental Health Engineering |
| Language: | English |