Mechanistic insight into heterogeneous Fenton-like catalysis with M-Al2O3/SiO2 (M = Fe, Co and Ni) for acrylonitrile mineralization from real ABS resin wastewater: Optimization and toxicity assessment

摘要: Abstract In this study, a novel heterogeneous catalyst M-Al2O3/SiO2 (M = Fe, Co and Ni) metal incorporate fly ash was synthesized via wet impregnation method then evaluated the performance during treatment of acrylonitrile butadiene styrene (ABS) resin wastewater. Synthesized characterized by several analytical techniques i.e., FTIR, XRD, BET, TEM, FE-SEM, XPS, EPR IC-PMS techniques. Response surface methodology (RSM) based central composite design (CCD) used to optimized operating parameters within their ranges e.g., oxidant dose (H2O2) 5–25 mM, 300–1500 mg/L, pH 2.5–10.5 reaction temperature 30–70 °C influences on COD removal were observed. particular, enhanced (95.62%) (88.95%) obtained under optimal conditions from RSM order toxicity wastewater, phytotoxicity study carried out various species as Vigna radiatus L., Cicer arietinum Hordeum vulgare L. etc. Acrylonitrile degradation kinetics performed two-step well fitted first kinetic model at different temperatures. The pathways elucidated temporal evolution intermediates final products detected GC-MS analysis along with reactive oxygen (ROS) scavenger study. Over four cycle experiments only 14.93% 18.78% efficiency inhibited very low leaching. overall cost process estimated 50.72$/m3 ABS