Effectiveness of Canna indica leaves and stalk biochar in the treatment of textile effluent

Abstract

Textile effluents often include water polluted with heavy metals, organic and inorganic contaminants, and different colors. It is not practical to remove these pollutants from the water. A variety of methods, including ozone, adsorption, membrane separation, biosorption, biodegradation, electrochemical degradation, and UV radiation, might be used in the water treatment procedure. Biochar made from Canna indica leaves and stems was used to remediate textile industry wastewater, which included color and chemical oxygen demand (COD). By using an absorption technique, the biochar was created by roasting the material at 500 °C, which removed the color and COD from the wastewater. The batches were subjected to many variations in temperature, concentration, and dose of biochar throughout the testing phase. Canna leaves have been shown to be effective in reducing COD at doses between one and 1.5 gm. COD levels were reduced by 83%, and color was reduced by around 94%. On the other hand, while keeping a constant dose, it was shown that canna stalks showed noteworthy effectiveness in lowering COD levels, with a range of 33%–48%. When it comes to eliminating color and COD, the leaves of the canna plant show more specificity than those of other plant species. The Jovanovich isotherm showed a good association with the biochar made from Canna indica leaves, according to the examination of the isotherm computation.