Open AccessWollastonite (CaSiO3)-based Composite Particles for Synthetic Food Dyes (Brilliant Blue) Removal in Aquatic Media: Synthesis, Characterization and Kinetic study
Author(s) -
Lusi Ernawati,
Ruri Agung Wahyuono,
Andromeda Dwi Laksono,
Andriati Ningrum,
Kurnia Handayani,
Audi Sabrina
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1053/1/012001
Subject(s) - wollastonite , adsorption , materials science , calcination , aqueous solution , langmuir adsorption model , mesoporous material , chemical engineering , fourier transform infrared spectroscopy , methylene blue , composite number , scanning electron microscope , bet theory , specific surface area , nuclear chemistry , composite material , chemistry , organic chemistry , photocatalysis , raw material , engineering , catalysis
We report a facile and environmentally friendly solid-state method to prepare mesoporous wollastonite (calcium silicate, CaSiO 3 ) based composite adsorbent from chicken eggshells and SiO 2 powder as starting materials for food dyes removal, i.e. brilliant blue. The CaSiO 3 particles were prepared using CaCO 3 /SiO 2 molar ratio of 1:5 and 2:5 and calcined at 1100°C. The physicochemical properties of adsorbent were characterized by SEM-EDX, XRD, BET-BJH, and FTIR analysis whilst the adsorbent performance was assessed for 100 ppm aqueous brilliant blue removal. The obtained CaSiO 3 shows single-phase hexagonal structure and the morphology was in irregular shape as revealed by scanning electron micrograph. In addition, the CaSiO 3 adsorbent shows specific surface area of 3.053 m 2 g −1 and a small pore diameter of 1.52 nm. The dye removal test indicates that maximum adsorption capacity of the dye molecules onto CaSiO 3 particles is approximately 173 mg g-1. The adsorption kinetics fit well with the pseudo-second order model while the adsorption equilibrium fits best the Langmuir model. In general, the prepared CaSiO 3 composite here is promising for dye removal in contaminated aqueous solution.