Removal of vanadium and palladium ions by adsorption onto magnetic chitosan nanoparticles
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Chitosan (CS), synthesized from chitin chemically extracted from shrimp shells, was used for the synthesis of magnetic chitosan nanoparticles (Fe3O4-CSN), which makes the adsorbent easier to separate. Fe3O4-CSN was used for the removal of toxic metals such as vanadium (V(V)) and palladium (Pd(II)) ions from aqueous solutions. Influencing factors on the adsorption process such as pH, contact time, adsorbent dosage, and agitation speed were investigated. A competitive adsorption of V(V) and Pd(II) ions for the active sites was also studied. The monolayer maximum adsorption capacities (Qm) of 186.6 and 192.3 mg/g were obtained for V(V) and Pd(II) ions, respectively. The pseudo-second-order equation gave the best fit for the kinetic data, implying that chemisorption was the determining step. Freundlich model yielded a much better fit than the other adsorption models assessed (Langmuir, Temkin and Dubinin-Radushkevich). Thus, the adsorption of V(V) and Pd(II) ions onto Fe3O4-CSN is a combination of physical and chemical adsorption, as based on the kinetics and equilibrium study. Generally, physical adsorption is the mechanism that governs the system, while chemical adsorption is the slowest adsorption step that takes place. Thermodynamic studies displayed that the adsorption process was exothermic and spontaneous. Removal efficiencies of 99.9% for V(V) and 92.3% for Pd(II) ions were achieved, implying that Fe3O4-CSN adsorbent had an excellent ability for the removal of the metal ions from real industrial wastewaters without remarkable matrix effect.
KeywordsVanadium Palladium Chitin Chitosan coated magnetic iron oxide nanoparticles Shrimp shell
We are sincerely thankful to the Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences (Project number: ETRC-9434) for the financial and academic supports of the present research.
Compliance with ethical standards
The authors declare that they have no conflict of interest.
- Banerjee M, Basu RK, Das SK (2018) Cu(II) removal using green adsorbents: kinetic modeling and plant scale-up design. Environ Sci Pollut Res:1–15Google Scholar
- Benavente M (2008) Adsorption of metallic ions onto chitosan: equilibrium and kinetic studies. Licentiate thesis, Royal Institute of Technology, Department of Chemical Engineering and Technology, Stockholm, SwedenGoogle Scholar
- Chorom M, Parnian A, Jaafarzadeh N (2012) Nickel removal by the aquatic plant (Ceratophyllum Demersum L.). Int J Environ Sci Dev 3:4–7Google Scholar
- Energy USD (2010) Analysis and geochemical modeling of vanadium contamination in groundwater new rifle processing site. In: ColoradoGoogle Scholar
- Khanafari A, Marandi R, Sanatei S (2008) Recovery of chitin and chitosan from shrimp waste by chemical and microbial methods. Iran J Environ Heal Sci Eng 5:19–24Google Scholar
- Melber C, Keller D, Mangelsdorf I (2002) Palladium: environmental health criteria. World Health Organization, Geneva, p 222Google Scholar
- Narayani H, Jose M, Sriram K, Shukla S (2018) Hydrothermal synthesized magnetically separable mesostructured H2Ti3O7/γ-Fe2O3 nanocomposite for organic dye removal via adsorption and its regeneration/reuse through synergistic non-radiation driven H2O2 activation. Environ Sci Pollut Res 25:20304–20319CrossRefGoogle Scholar
- Rahbar N, Behrouz E, Ramezani Z (2017) One-step synthesis of zirconia and magnetite nanocomposite immobilized chitosan for micro-solid-phase extraction of organophosphorous pesticides from juice and water samples prior to gas chromatography/mass spectroscopy. Food Anal Methods 10:2229–2240CrossRefGoogle Scholar
- Wang M, Wu L, Hu Q, Yang Y (2018) Application of magnetic nanoparticles coated with sodium dodecyl sulfate and modified with 2-(5-bromo-2-pyridylazo)-5-diethyl aminophenol as a novel adsorbent for dispersive-magnetic solid-phase extraction and determination of palladium in soil samples. Environ Sci Pollut Res 25:8340–8349CrossRefGoogle Scholar
- Yamaura M, Costa CH, Gualbertoyamamura AP (2007) Adsorption studies for Cr(VI) onto magnetic particles covered with chitosan. International nuclear Atlantic conference - INAC 2007, Santos, SP, Brazil, September 30 to October 5 2007Google Scholar