Premium
Adsorption of Brilliant Green Dye on Biochar Prepared From Lignocellulosic Bioethanol Plant Waste
Author(s) -
Saif Ur Rehman Muhammad,
Kim Ilgook,
Rashid Naim,
Adeel Umer Malik,
Sajid Muhammad,
Han JongIn
Publication year - 2016
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300954
Subject(s) - biochar , adsorption , langmuir adsorption model , chemistry , aqueous solution , biofuel , brilliant green , hydrolysis , nuclear chemistry , straw , chemical engineering , pulp and paper industry , chromatography , organic chemistry , pyrolysis , waste management , inorganic chemistry , engineering
This study was aimed at the adsorption of Brilliant Green (BG) on hydrolyzed rice straw biochar, which was obtained from a lignocellulosic bioethanol process. Rice straw biochar (RBC) possessed surface properties such as a Brunauer–Emmett–Teller (BET) surface area of 232.31 m 2 /g, a total pore volume of 0.30 cm 3 /g, and an average pore width of 5.22 nm. Adsorption studies were carried out to investigate the effect of experimental factors such as pH (2–10), biochar dose (0.05–1.25 g/L), contact time (30–480 min), and temperature (30 to −50°C) on the adsorption of BG. The Langmuir isotherm ( R 2 = 0.998) fitted well to the adsorption data for initial dye concentrations of 20–500 mg/L, implying that BG adsorption occurred in the form of a monolayer on RBC. Adsorption kinetics was well fitted by the pseudo‐second order kinetic model ( R 2 ≥ 0.988) for all tested dye concentrations. The thermodynamic study revealed that BG adsorption on RBC was spontaneous, favorable, and a physical process. The maximum adsorption capacity of RBC was found to be 111.11 mg/g. These results showed that RBC, prepared from the waste of the bioethanol process, can be effectively used as a promising cheap adsorbent to remove dyes from aqueous solution. This approach of product diversification (bioethanol along with biochar) may lead to a cost effective and cleaner production of bioethanol.