Adsorptive removal of anionic dye from aqueous solution using chemically activated coconut shell coke
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Date
2022-08
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G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
Abstract
Discharge of industrial waste such as dye effluents in water bodies has become a global environmental issue due to the application of dye in daily life. Survival has become challenging with these contaminants for all living beings which directly or indirectly depends on natural water sources as they continuously getting contaminated by related industries. To overcome the issue adsorption has been employed in the present work among several known techniques for dye removal. Commercially available activated carbons are found superior for adsorption but they are expensive. So current work focuses on utilizing agricultural waste for the preparation of activated carbon and coconut shell was taken as raw material. Batch adsorption was performed with different concentration of methyl orange dye (MO) with increasing ACC dose. Later, UV-VIS studies reveal that ACC is highly effective towards the removal of MO and the maximum efficiency of 99% was attained for 10 mgL-1 of MO with 0.5 gm of ACC. Experiment was also conducted with coconut shell soft coke to compare the effect of activation and it gives maximum efficiency of 45 % in 5 mgL-1 MO with 0.5 gm dosage and confirms the outstanding effect of chemical activation performed on coconut shell soft coke by significantly enhancing its efficiency. Study shows the striking results of ACC, so one more batch study was
conducted with 0.5 gm of bamboo wood derived coke in both its non-activated (BC) and activated (ABC) form and results were superior than ACC for 5mgL-1 of MO which confirms the bright future of agricultural by-products for making low-cost activated carbons. Moreover, FTIR studies were also carried out to understand the effect on various functional groups present in ACC, MO, solid residue and filtrate. So, the present work demonstrated the potency of agricultural waste to become a successful raw material for the production of highly effective low-cost activated charcoal for the adsorptive removal of dye from water along with the benefits of disposal of waste product.