Baoxin Liu, XiaoQian Che, WanTao Ning, Jing Li, ZhanQing Lu
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Research on Efficient Chlorine Removal via the Synergistic Action of Sulfite and Copper Ions
Chlorine is a common harmful element in industrial wastewater, characterized by its high water solubility and non-biodegradability. Removing chloride ions from wastewater is a challenging task. This study explores the mechanism of removing chloride ions using sulfite and copper ions together. The reaction kinetics and free radicals involved were also studied in detail. Under optimal conditions, chloride ion concentration dropped from 3545 to 197.09 mg/L, achieving a 94.44% removal rate. The removal process follows first-order and second-order kinetic equations, with activation energies of 22.29 kJ/mol and 69.11 kJ/mol, respectively. The dechlorination slag was analyzed using XRD, SEM-EDS, and XPS to determine its composition, morphology, and valence states. Free radicals in the sodium sulfite solution were identified by ESR spectroscopy. The movement of the reaction system was observed using a high-speed camera. Based on thermodynamic data and changes in ion concentration, the mechanism of chloride ion removal using sodium sulfite and copper sulfate was elucidated.
期刊介绍：
JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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