Title : Bioremediation of Methylene blue from the aqueous environment using bamboo leaves and its acid-treated forms as biosorbent
Bamboo leaves (BL) and their two acids-treated forms H2SO4 (SBL) and H3PO4 (PBL), have been applied as bio-sorbents for the removal of methylene blue (MB) from its aqueous solution. The effects of different operating parameters like pH, bio-sorbent quantity, the contact time, initial concentration of MB and temperature are investigated. Several kinetic models have been applied to fit the kinetic data, which can be clarified well by the pseudo-2nd-order model. The isotherm data fit well with the Langmuir model with maximum bio-sorption capacity, for PBL is 181.172 mg/g at 298 K. The sorption energy was calculated from the Dubinin-Radushkevich (DR) isotherm and confirmed the physisorption. The 13C NMR and FTIR outcomes displayed that several functional groups of cellulose, hemicellulose and lignin are associated with eradicating MB. The adsorption mechanism is also established. Also, the percentage elimination of MB has been fruitfully predicted by multiple polynomial regression (MLR) and genetic algorithms (GA). The method of the safe disposal of the used adsorbents was also reported.
- In rural areas of the 3rd World countries, many small and medium-sized industries generate wastewater containing heavy metals and dyes. These industries are not in a position to treat their wastewater before discharge due to financial constraint. This wastewater enters the local water bodies or the agricultural fields and ultimately enters the food chain.
- This adsorptive technique benefits these industries as the adsorbents are locally available practically free of cost.