November 22, 2024

Malihe Omrani

Academic Rank: Assistant professor
Address:
Degree: Ph.D in Nuclear Engineering
Phone: 077
Faculty: Persian Gulf Research Institue

Research

Title
Removal of heavy metals from water using oxygen plasma generator system
Type Thesis
Keywords
يون هاي فلزي، نمكزدايي، پلاسما، پلاسماي سرد، تصفيه آب
Researchers abbas hayati (Student) , Seyed Hamed Meraji (Primary advisor) , Malihe Omrani (Primary advisor) , Ali Mohammad Sanati (Advisor) , Bahman Ramavandi (Advisor)

Abstract

Background: evaluating the efficacy of plasma generator systems in the extraction of metal ions from aqueous solutions, as well as their application in the desalination of water, under varying time intervals and concentrations. Aim: decrease the concentration of dissolved metal ions in water, thereby enhancing water quality and improving key parameters related to water hygiene. Methodology: This study involved the design and construction of two distinct plasma generation systems: one based on aeration and the other employing direct radiation methods. The plasma generated by these two systems was assessed as being consistent and appropriate for use. To investigate the removal of lead ions, a standard solution with a concentration of 1000 ppm was prepared, from which various lower concentrations were derived. A NaCl solution was utilized to evaluate the removal of sodium ions from seawater and brine, while a MnCl2 solution was employed to assess the removal of manganese ions. Following the experiments, the samples were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic absorption spectroscopy, a spectrophotometer, an electrical conductivity (EC) meter, and a pH meter. Findings: The experimental results indicate that the plasma generator system utilizing the aeration method effectively eliminates 30% of lead ions present in water within a 15-minute. In contrast, the plasma generator system employing the direct radiation method achieves a 50% reduction in the electrical conductivity (EC) of water while simultaneously facilitating the evaporation of soluble salts. This process also leads to an increase in nitrate and nitrite levels, accompanied by a decrease in pH. Conclusion: the results indicate that plasma-generating systems demonstrate effective performance in the removal of water-soluble ions. Notably, these systems facilitate the precipitation or evaporation of metal ions through advanced oxidation processes. Furthermore, the enhance