Next Article in Journal
Analysis of Inventory Turnover as a Performance Measure in Manufacturing Industry
Next Article in Special Issue
Simultaneous Removal of Calconcarboxylic Acid, NH4+ and PO43− from Pharmaceutical Effluent Using Iron Oxide-Biochar Nanocomposite Loaded with Pseudomonas putida
Previous Article in Journal
An Optimal Feedback Control Strategy for Nonlinear, Distributed-Parameter Processes
Previous Article in Special Issue
Adsorption Process and Properties Analyses of a Pure Magadiite and a Modified Magadiite on Rhodamine-B from an Aqueous Solution
 
 
Article

Arsenic Removal from Mining Effluents Using Plant-Mediated, Green-Synthesized Iron Nanoparticles

1
Mining Engineering Department, Faculty of Engineering, University of Birjand, Birjand 9717434765, Iran
2
Environmental Sciences Department, University of Birjand, Birjand 9717434765, Iran
3
Mineral Processing Group, Mining Engineering Department, Tarbiat Modares University, Tehran 1411713116, Iran
*
Author to whom correspondence should be addressed.
Processes 2019, 7(10), 759; https://doi.org/10.3390/pr7100759
Received: 17 September 2019 / Revised: 9 October 2019 / Accepted: 14 October 2019 / Published: 17 October 2019
(This article belongs to the Special Issue Advances of Nanocomposites in Bioremediation Processes)
Arsenic contamination in industrial and mining effluents has always been a serious concern. Recently, nano-sized iron particles have been proven effective in sorptive removal of arsenic, because of their unique surface characteristics. In this study, green synthesis of iron nanoparticles was performed using a mixed extract of two plant species, namely Prangos ferulacea and Teucrium polium, for the specific purpose of arsenic (III) removal from the aqueous environment. Results of UV-visible spectrometry, X-ray powder diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) analyses confirmed the formation of iron nanoparticles from Prangos ferulacea (Pf) and Teucrium polium (Tp) extracts. The synthesized Fe nanoparticles morphology was studied via microscopy imaging. The particle size was 42 nm, as assessed by dynamic light scattering (DLS) analysis. Adsorption experiments were also designed and performed, which indicated 93.8% arsenic removal from the aqueous solution at 200 rpm agitation rate, 20 min agitation time, pH 6, initial concentration of 0.1 g/L, and adsorbent dosage of 2 g/L. Adsorption isotherm models were investigated, and the maximum uptake capacity was determined to be about 61.7 mg/g. The kinetic data were best represented by the pseudo-second kinetic model (R2 = 0.99). The negative value of Gibbs free energy, the enthalpy (−7.20 kJ/mol), and the entropy (−57 J/mol·K) revealed the spontaneous and exothermic nature of the adsorption process. Moreover, the small quantity of the activation energy confirmed the physical mechanism of arsenic adsorption onto iron nanoparticles and that the process is not temperature sensitive. View Full-Text
Keywords: arsenic adsorption; isotherm model; process optimization; thermodynamics; kinetics study arsenic adsorption; isotherm model; process optimization; thermodynamics; kinetics study
Show Figures

Graphical abstract

MDPI and ACS Style

Karimi, P.; Javanshir, S.; Sayadi, M.H.; Arabyarmohammadi, H. Arsenic Removal from Mining Effluents Using Plant-Mediated, Green-Synthesized Iron Nanoparticles. Processes 2019, 7, 759. https://doi.org/10.3390/pr7100759

AMA Style

Karimi P, Javanshir S, Sayadi MH, Arabyarmohammadi H. Arsenic Removal from Mining Effluents Using Plant-Mediated, Green-Synthesized Iron Nanoparticles. Processes. 2019; 7(10):759. https://doi.org/10.3390/pr7100759

Chicago/Turabian Style

Karimi, Pari, Sepideh Javanshir, Mohammad Hossein Sayadi, and Hoda Arabyarmohammadi. 2019. "Arsenic Removal from Mining Effluents Using Plant-Mediated, Green-Synthesized Iron Nanoparticles" Processes 7, no. 10: 759. https://doi.org/10.3390/pr7100759

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop