Performance of biochar prepared from municipal solid waste for removal of methylene blue dye
M. Jadhav1*, S. Kadam2
Ample quantity of color wastewater produced due to application of dyes.
Biochar is an activated carbon prepared from municipal solid waste.
Biochar is a cost effective adsorbent used for removal of dyes from wastewater.
Adsorption isotherm modeling was done using various models.
Adsorption is proved to be the most effective method of dye removal.
Dye is a substance used to impart color to textiles, papers, leathers, foods, plastics and cosmetics. Plenty of color wastewater is produced due to application of dyes. This wastewater discharged from these industries poses certain hazards and environmental problems. The objective of this study is to remove methylene blue (MB) dye by biochar (activated carbon) prepared from municipal solid waste. Adsorption of MB dye was performed by using both batch as well as fixed bed column study. The effect of various parameters viz. adsorbent dose, pH, stirring rate, dye concentration and contact time on adsorption of MB dye was studied in batch mode and that of dye concentration; pH and flow rate was studied in fixed bed column mode. Batch study concluded that increase in adsorbent dose increases the removal efficiency of MB dye due to increase in available surface area for adsorption, also increase in initial concentration of dye decreases the removal efficiency. The MB dye adsorption was also affected by pH and other process parameters. Maximum removal efficiency was observed at dose of 400 mg (95.2%), with initial dye concentration 50 mg/l (90%) at pH value 4 (22.94%) with 2 hours (98.79%) of contact time at 120 rpm (99.82%). Adsorption isotherm modeling was done using Langmuir, Freundlich, Temkin and Redlich Peterson models, where the experimental data was better fitted to the Redlich Peterson model than other three models. Redlich Peterson model showed the best fit with coefficient of determination (R2 = 1) equal to unity. The data of batch study was used for continuous fixed bed column study. This study concluded that at low flow rate and low dye concentration maximum removal of dye was observed. pH played a vital role in removal efficiency of MB dye and maximum removal was observed at pH = 7.
To cite this article: Jadhav M, Kadam S. Performance of biochar prepared from municipal solid waste for removal of methylene blue dye. Journal of Advanced Civil Engineering Practice and Research 2020;11:2-9.