Synthesis of Fe(III)-g-C 3 N 4 and Applications of Synergistic Catalyzed PMS with Mn(VII) for Methylene Blue Degradation

Lin Li, Huangling Gu, Qiong Wang (), Meiyin Chen, Wenjing Ma and Hongwei Zhang
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Lin Li: School of Urban and Environment, Hunan University of Technology, Zhuzhou 412000, China
Huangling Gu: School of Urban and Environment, Hunan University of Technology, Zhuzhou 412000, China
Qiong Wang: School of Urban and Environment, Hunan University of Technology, Zhuzhou 412000, China
Meiyin Chen: School of Urban and Environment, Hunan University of Technology, Zhuzhou 412000, China
Wenjing Ma: School of Urban and Environment, Hunan University of Technology, Zhuzhou 412000, China
Hongwei Zhang: School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China

Sustainability, 2024, vol. 16, issue 6, 1-15

Abstract: Refractory organic pollutants pose a great threat to public health in water bodies due to their toxicity and low biodegradability. Developing a method of activating persulfate efficiently and in an environmentally friendly way has become a popular topic of research in current advanced oxidation water treatment technologies. Fe(III)-g-C 3 N 4 was prepared by the calcination method. Fe(III) was anchored on the framework of g-C 3 N 4 . The characterization analysis indicated that Fe(III) was successfully loaded on g-C 3 N 4 . The best effect for MB degradation was Fe(III)-g-C 3 N 4 (0.1 g/L) dosed with 30 µmol/L KMnO 4 for synergistic catalyzed PMS (0.1 g/L), where the degradation rate could reach 95.4%. The optimum temperature for MB degradation was determined to be 10 °C. The optimum pH range of Fe(III)-g-C 3 N 4 /Mn(VII) synergistic catalyzed PMS for MB degradation was pH 4.4–6.6 under acidic conditions, and the optimum pH range for MB degradation was pH 8–10 under alkaline conditions. The Fe(III)-g-C 3 N 4 /Mn(VII) synergistic catalyzed PMS system was also tested for the degradation of methyl orange and rhodamine b, and good degradation results were obtained with the degradation rates of 87.37% and 84%, respectively. It facilitates the reduction in pollutant emissions, improves water quality and will have a positive impact on the sustainability of the environment.

Keywords: Fe(III)-g-C 3 N 4 (FeCN); advanced oxidation; synergistic catalytic; dosing ratios; catalytic activity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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