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<p>This study examined the degradation of Orange G dye (OG) in an aqueous solution utilizing vanadium-activated persulfate. The experiment was carried out by changing the vanadium concentration between 8.2 and 12.3&#xa0;mM, the persulfate concentration from 3.7 to 22.2&#xa0;mM, stirring speed between 200 and 400&#xa0;rpm, temperature from 25 to 35&#xa0;°C, and the initial dye concentration from 2 to 10&#xa0;mg/L. Optimization was fulfilled employing statistical methods such as Plackett–Burman. Design (PBD) and Response Surface (RSM). The Plackett–Burman design (PBD) and Response Surface Methodology(RSM). The Plackett–Burman design involved twelve experimental trials. The significant parameters identified were the initial dye concentration ([OG]), persulfate concentration ([PS]), vanadium concentration ([V]), and temperature (T). Response Surface Methodology (RSM) was utilized to determine the optimal degradation parameters. The conditions that yielded the highest degradation efficiency (100%) were a temperature of 25&#xa0;°C, a persulfate concentration of 21.41&#xa0;mM, and a vanadium concentration of 10.88&#xa0;mM. A confirmatory study was then conducted employing these optimized parameters, which revealed a positive outcome consistent with the expected model. The study concluded that the PS/V oxidation system is an effective and promising method for degrading Orange G, even in complex natural environments.</p>

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Vanadium (V) activates persulfate for degradation of Orange G dye in aqueous system: application of Plackett–Burman design and response surface methodology

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Naima Habache,
  • Ouahiba Bechiri

摘要

This study examined the degradation of Orange G dye (OG) in an aqueous solution utilizing vanadium-activated persulfate. The experiment was carried out by changing the vanadium concentration between 8.2 and 12.3 mM, the persulfate concentration from 3.7 to 22.2 mM, stirring speed between 200 and 400 rpm, temperature from 25 to 35 °C, and the initial dye concentration from 2 to 10 mg/L. Optimization was fulfilled employing statistical methods such as Plackett–Burman. Design (PBD) and Response Surface (RSM). The Plackett–Burman design (PBD) and Response Surface Methodology(RSM). The Plackett–Burman design involved twelve experimental trials. The significant parameters identified were the initial dye concentration ([OG]), persulfate concentration ([PS]), vanadium concentration ([V]), and temperature (T). Response Surface Methodology (RSM) was utilized to determine the optimal degradation parameters. The conditions that yielded the highest degradation efficiency (100%) were a temperature of 25 °C, a persulfate concentration of 21.41 mM, and a vanadium concentration of 10.88 mM. A confirmatory study was then conducted employing these optimized parameters, which revealed a positive outcome consistent with the expected model. The study concluded that the PS/V oxidation system is an effective and promising method for degrading Orange G, even in complex natural environments.