![]() The study has focused on a novel route of synthesis of chemically treated adsorbent under inert condition (nitrogen atmosphere) and higher temperature. The adsorbent utilised in this study for both batch and optimization study is synthesized from waste biomass namely tea- waste that is converted into activated carbon in the form of biochar. Adsorption process is found to be an economical and easy method for wastewater treatment. Various low-cost biomasses like potato peel, coffee waste, peanut shell, sunflower pith, and rice husk have been found to be a suitable precursor for bio-adsorbents which yield high carbon and less ash content. Agricultural waste has shown a significant potential in manufacture of activated charcoal which can be used as adsorbent because of their abundance, easy availability and reusability. Activated carbon is processed to have low-volume pores and increased surface-area available for adsorption. Low cost adsorbents can be used, but the performance would vary according to the type of the dye. In such a situation the technique of adsorption can be implemented in the removal of dyes. The various methods like chemical and electrochemical oxidations, coagulation, and reverse osmosis are costly when required to use in large scale. Various methods that are based on aerobic or anaerobic biodegradation and photodegradation are not 100% efficient for removal of most of the dyes from wastewater. ![]() Wastewater containing IC dye must undergo treatment before discharging into the environment as it may cause skin and eye irritation, cancer to human. According to WHO, the permissible limit of indigo carmine dye is 5 μg L − 1 in water. Indigo carmine (IC) dye is widely present in wastewater produced from textile, food, cosmetic, pharmaceutical and paper industries. Dyes are chemically designed and manufactured to be resistant to degradation by oxidizing agents, light, high temperatures and hence, cannot be easily removed by the conventional wastewater treatments methods. Carcinogenic dyes might cause mutations in organisms. If this wastewater is released into a natural aquatic system, the photochemical activities of that aquatic system are adversely affected by the coloration of dye which reduces light penetration. The thermodynamic study showed the dye removal to be spontaneous and endothermic.ĭyes are a specific group of chemical pollutants, posing serious environmental problems, due to annual production in large amounts from different industrial sector like textile industry. The results indicated that the adsorption followed Langmuir isotherm model with maximum uptake of 20 mg g − 1 and pseudo second order kinetic model with the best correlation coefficient. The adsorption mechanism has been analysed by fitting the experimental data in different adsorption isotherm and kinetic models. Results of the experiments performed using the GO-like adsorbent synthesized from tea waste confirmed potential efficiency of adsorption of indigo carmine dye from synthetic waste water solution. Various experimental parameters are evaluated for the removal efficiency of the synthesized adsorbent under the present study. ![]() Carbonaceous material was chemically activated by using modified Hummer’s method and it was observed through Scanning Electron Microscopic image, Fourier Transform Infrared Spectrometer, X-ray diffractometer and Brunauer, Emmett and Teller analysis that revealed that the modified biochar is comparably similar to graphene oxide (GO). Carbonaceous material (tea waste) has been employed and it showed removal percentage of indigo carmine at 90% through adsorption process. The present work determines efficiency of domestic food waste like tea waste in removing indigo carmine from synthetic textile wastewater. ![]()
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