Open AccessSynthesis of iron modified sugarcane bagasse activated carbon for oxidation degradation of malachite green
Author(s) -
Yean Ling Pang,
Wai Chong Cheam,
Kein Huat Chua,
Steven Lim
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/476/1/012137
Subject(s) - malachite green , fourier transform infrared spectroscopy , scanning electron microscope , nuclear chemistry , degradation (telecommunications) , chemistry , malachite , catalysis , inductively coupled plasma , composite number , analytical chemistry (journal) , materials science , chemical engineering , chromatography , adsorption , copper , composite material , organic chemistry , plasma , physics , quantum mechanics , computer science , telecommunications , engineering
Iron (II, III) oxide (Fe 3 O 4 ), activated carbon (AC) and Fe 3 O 4 /AC composites at various weight ratios (1:1, 3:1 and 1:3) were synthesised successfully using chemical impregnation method. The synthesised composite samples were then analysed by using scanning electron microscope coupled with energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). Heterogeneous photo Fenton and Fenton-like processes were applied in degrading malachite green. Fe 3 O 4 /AC composite samples showed higher catalytic activity as compared to pure Fe 3 O 4 and AC. The composite of Fe 3 O 4 /AC at weight ratio of 1:1 (FeAC11) was determined to be the optimal mixing weight ratio as it possessed the highest heterogeneous photo Fenton and Fenton-like degradation efficiency of malachite green. The highest degradation efficiency of malachite green was achieved at initial dye concentration of 30 ppm, FeAC11 dosage of 0.8 g/L, solution pH of 5, 4 mM of H 2 O 2 with the degradation efficiency of 89.22 % after 3 min. The composite sample FeAC11 depicted high stability as only little amount of leached iron (about 4 mg/L) was detected by inductively coupled plasma optical emission spectrometry (ICP-OES). Pseudo second-order kinetic was best fitted to the reaction kinetic of heterogeneous photo Fenton and Fenton-like on the degradation of malachite green at different solution pH.