Photocatalytic removal of AR14 from aqueous solutions under visible light irradiation by synthesising sugarcane bagasse magnetic graphene oxide

Abstract

ABSTRACT At this present investigation, sugarcane bagasse magnetic graphene oxide (SCBMGO) was synthesised in several stages and used to remove Acid Red 14 dye under LED visible light. XRD, FT-IR, SEM, EDX, VSM and pHPZC analyses demonstrated the structural characteristics. The effect of variables like the pH, catalyst dose, dye concentration, hydrogen peroxide, purging gases, organic compounds, ionic strength, and comparison of different processes, radical scavengers, and reusability on AR14 removal efficiency were investigated. The most removal efficiency occurred under ideal situation: [AR14]0 = 10 mgL−1, SCBMGO dosage = 0.5 gL−1, pH = 3, hydrogen peroxide = 5 mM, and contact time equal to 120 minutes. Except for the dose, the efficiency of photocatalytic removal of AR14 decreased with the addition of other variables. AR14 photocatalytic removal obeyed the pseudo-second-order reaction kinetic. The EEO value for LED/SCBMGO (59.62 kWh/m3) process, as a function of removal proficiency, illustrated that this process was elevated productivity and diminished the cost of electrical energy consumed by the system. The highest removal efficiency of AR14 occurred in the LED/SCBMGO process (89.85%). In addition, recycling test efficiency was the same at the beginning, and the 6th stage. The removal efficiency of AR14 in drinking water was (71.45%). SCBMGO, as an effective and environmentally friendly catalyst, can be used in removing AR14 dye and organic pollutants of aqueous environments under the LED visible light.