Removal of colorants from waste water using biochar derived from leaf waste

Abstract

One of the major contaminants of water resources is the newlineindustrial effluents (textile industry, printing industry, leather industry, paint newlineindustry, etc.) with the presence of synthetic dyes. Synthetic dye production newlinein the world exceeds 106 million tons per year. 15 % of that quantity being newlinedischarged as effluents into aquatic ecosystems because of dyeing processes. newlineThe presence of very hazardous and carcinogenic dyes in the effluents newlinethreatens the aquatic ecosystem severely. Amidst various dye removal newlinetechniques such as coagulation or flocculation, ion exchange, irradiation, newlinemembrane filtration, nano filtration, ultra-filtration or reverse osmosis, newlinethe adsorption technique seems to be more promising, efficient and newlineenvironment friendly.In this study, the efficiency for the removal of Basic Fuchsin newlineRed (BFR), Methylene Blue (MB), and Crystal Violet (CV) Dye using the newlineAreca Leaf Waste Biochar (AB) and Turmeric Leaf Waste Biochar (TB) was newlinestudied by varying various parameters. Initially, the Areca Leaf Plate Waste newlineBiomass (AL) and the Turmeric Leaf Waste Biomass (TL) were collected newlinefrom Sirumugai Village of Coimbatore District in Tamil Nadu, India, newlineprocessed and then were converted into corresponding biochar through newlinepyrolysis at a temperature range of 250 - 400 °C, at a heating rate of newline10 °C/min and a reaction time of 120 min. With respect to ASTM standards newlinethe AL, TL, AB and TB samples were characterized via Proximate Analysis, newlineZeta Potential, Thermo Gravimetric Analysis (TGA), Scanning Electron newlineMicroscope (SEM), Brunauer Emmett Teller (BET), Energy-Dispersive newlineX-ray Spectrophotometer (EDX), X-ray Diffraction Analysis (XRD) and newlineFourier Transform Infrared Spectroscopy (FTIR). newline newline