—Municipal solid waste (MSW) can have a negative impact on the environment and / or human health, if not properly managed. Though landfill is the most common method used to manage MSW, treating MSW using waste-toenergy (WtE) technologies is an option that is receiving increasing interest. Pyrolysis is a WtE technology that is capable of converting waste into products such as bio-gas, biooil and bio-char. Bio-char, which varies in composition based on the raw material pyrolysed, has the potential to be used as a fuel and as an applied material for catalysis or adsorption. In this work the removal of azo dye was investigated using biochar from pyrolysis of a cellulosic municipal solid waste. The bio-char was characterised using Scanning Electron Microscopy and Surface Area Analysis. The influence of pH on the dye removal was investigated over the range 4-7. The experimental data was analysed using four non-linear kinetic models (Pseudo first-order, pseudo second-order, Weber intraparticle diffusion and Elovich equation) and four non-linear isotherm models (Langmuir, Freundlich, Temkin and Sips), and ranked based on the statistical analysis tools in origin software. The dye removal kinetics most closely followed pseudo-first order kinetics whilst the adsorption isotherms were most closely fitted by the Temkin model over the pH range studied.
—Azo dye, bio-char, municipal solid waste, water treatment.
Manu Agarwal is with Bioengineering and Environmental Centre (BEEC) and RMIT-IICT Research Centre, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India; he is also with Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, Melbourne VIC 3001, Australia.
James Tardio is with Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, Melbourne VIC 3001, Australia.
S. Venkata Mohan is with Bioengineering and Environmental Centre (BEEC), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India (e-mail: email@example.com).
Cite:Manu Agarwal, James Tardio, and S. Venkata Mohan, "Pyrolysis Biochar from Cellulosic Municipal Solid Waste as Adsorbent for Azo Dye Removal: Equilibrium Isotherms and Kinetics Analysis," International Journal of Environmental Science and Development vol. 6, no. 1, pp. 67-72, 2015.