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Visible‐light‐driven photocatalytic degradation of fenpyroximate in rotating packed bed reactor using Fe 3 O 4 @PbS@Ni 2 P magnetic nanocomposite photocatalyst: Response surface modelling and optimization
Author(s) -
Mosleh Soleiman,
Rahimi Mahmood Reza,
Ghaedi Mehrorang,
Asfaram Arash,
Javadian Hamedreza,
Sadeghfar Fardin,
Jannesar Ramin
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4513
Subject(s) - photocatalysis , chemistry , reaction rate constant , irradiation , adsorption , degradation (telecommunications) , nuclear chemistry , volumetric flow rate , analytical chemistry (journal) , packed bed , response surface methodology , composite number , central composite design , chemical engineering , kinetics , composite material , chromatography , materials science , catalysis , organic chemistry , thermodynamics , physics , quantum mechanics , nuclear physics , telecommunications , computer science , engineering
A highly efficient rotating packed bed photocatalytic reactor based on Fe 3 O 4 @PbS@Ni 2 P composite for the degradation of fenpyroximate (FP) as an acaricide in agriculture is described. The visible‐light‐driven photocatalyst was characterized using various techniques. The interaction of operational parameters consisting of rotational speed (400–1200 rpm), photocatalyst dosage (0.20–0.40 g l −1 ), solution flow rate (0.10–0.50 l min −1 ), aeration rate (15–35 l min −1 ), FP initial concentration (5–45 mg l −1 ), pH (2–10) and irradiation time (20–100 min) for FP degradation was examined via central composite design under response surface methodology. Accordingly, under the suggested optimum conditions, namely rotational speed of 950 rpm, Fe 3 O 4 @PbS@Ni 2 P dosage of 0.30 g l −1 , solution flow rate of 0.30 l min −1 , aeration rate of 25 l min −1 , pH of 6.0 and irradiation time of 85 min, more than 99% of 45 mg l −1 FP was degraded. The Langmuir–Hinshelwood kinetic model was the best equation for the description of the experimental data. According to the rate constant, the contribution of photocatalytic degradation, adsorption and photolysis to the reduction of FP concentration and, subsequently, the efficiency of water treatment were studied.