Removal of Cr(VI) Ions from Aqueous Solutions Using Nickel Ferrite Nanoparticles: Kinetic and Equilibrium Study
Journal Title: Archives of Hygiene Sciences - Year 2017, Vol 6, Issue 1
Abstract
Background & Aims of the Study: Heavy metals are the most important and main pollutants because of their accumulation and high toxicity even at very low dose and cause serious hazards to ecological system as well as human health. Thus, their removal has been challenged from drinking water and industrial waters with different technologies. The purpose of this work is to investigate the removal of Cr(VI) from aqueous solutions. Materials & Methods: NiFe2O4 nanoparticles was prepared by the co-precipitation method and then applied for adsorption of Cr(VI) ions from water. Characterization of nanoparticles was carried out via TEM, EDX, XRD and BET analysis. Various physico-chemical parameters like the effect of contact time, pH and adsorbent dose were studied, using batch process to optimize conditions for maximum adsorption. Results: The results demonstrated that the size of the NiFe2O4 nanoparticles was about 12 nm and had selectivity for Cr(VI) adsorption. Also, adsorption process was found to be fast with equilibrium time of 55 min. Optimum pH was found to be 3. Maximum adsorption capacity (qm) as calculated from Langmuir isotherm was found to be 294.1 mg g-1. Analysis of adsorption kinetics indicated better applicability of pseudo-second-order kinetic model. Conclusions: The results of this study represented that the synthesized NiFe2O4 nanoparticles could be useful for the simultaneous removal of anionic ions from wastewaters.
Authors and Affiliations
Raziyeh Zandi Pak
Keywords
Related Articles
- EP ID EP469987
- DOI 10.29252/ArchHygSci.6.1.17
- Views 118
- Downloads 0
Survey Heavy Metal Content in Cydonia Fruits Collected from Market Sites in Hamadan, Iran
Background & Aims of the Study: High concentration of toxic metals in foodstuffs is among the public interest and therefore requires rapid methods to survey the concentration of these contaminants. In the present study,...
Evaluating of Heavy Metal Contaminations in the Most Applicable Food Spices and Flavors in Hamedan, Iran
Background & Aims of the Study: Iranian food diet contains nutrients and herbal spices. From the most important challenges in relation to these spices is their pollution with various heavy metals. Thus, this study aims t...
Prevalence and Predictors of Overweight and Obesity of Adolescents
Background: Adolescent overweight and obesity are a worldwide public health problem plays an important role in their health. This study was conducted on to determine the prevalence and predictors of adolescent overweight...
Synthesis and Application of Iron Oxide/Silica Gel Nanocomposite for Removal of Sulfur Dyes from Aqueous Solutions
Background & Aims of the Study: water pollution by synthetic organic dyes is mainly regarded as environmental and ecological critical issues worldwide. In this research, magnetite iron oxide/silica gel nanocomposite (ter...
General Health Status Among Students of Islamic Azad University: A Cross-Sectional Study from Iran
Background & Aims of the Study: Health is one of the basic needs of human. There is a close relationship between physical and mental health. Human psyche is directly affected by his physical condition, and mutually his b...