Removal of Cu²⁺ from Aqueous Solutions by Magnetic Nanoparticles-Pomelo Peel Composite

Abstract:

Many researchers have currently interested in using Fe₃O₄ magnetic nanoparticles (MNPs) impregnated onto agricultural wastes for removal of heavy metal ions in wastewater treatment process. In this work, the MNPs-pomelo peel powder (MNPs-PP) composites were developed and their adsorption capacities of heavy metal ions were studied as well. The MNPs-PP samples were synthesized by co-precipitation method in different ratios; 2:1, 2:2, 2:4, 2:5, and 2:6 (by weight). The results showed that the as-synthesized MNPs were mainly spherical shape with an average particle size of approximately 12.7 ± 0.6 nm. Then, the MNPs, PP and MNPs-PP in different ratios were used as adsorbents for adsorption of 25 ppm Cu²⁺ in aqueous solution. The pH and temperature of solution were kept constant at 5 and 30 °C, respectively. From the experiment, it was found that the adsorption capacities decreased in the following order: PP > MNPs-PP (2:6) > MNPs-PP (2:5) > MNPs-PP (2:4) > MNPs-PP (2:2) > MNPs-PP (2:1) > MNPs. It indicated that the adsorption capacity of as-synthesized MNPs-PP is significantly higher than that of sole MNPs. Furthermore, the adsorption capacities of MNPs-PP increased with increasing the weight ratio of PP. The MNPs-PP developed herein has demonstrated not only high adsorption efficiency but also have shown additional benefits such as ease to synthesis, cost-effectiveness, environmental-friendliness, and ease to separate from treated water by an external magnet.

• Periodical: Key Engineering Materials (Volumes 675-676)
• Pages: 154-157
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.675-676.154
• Online since: January 2016
• Authors: Itsaraporn Pengsaket, Kheamrutai Thamaphat*, Pichet Limsuwan
• Keywords: Heavy Metal Ion, Magnetic Nanoparticles, Magnetite, Pomelo Peel

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