Synthesizing and Characterizing Sawdust Biochar/Fe3O4 Nanocomposites and its Potential Application in Textile Wastewater Treatment
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College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan
Submission date: 2018-01-05
Final revision date: 2018-05-08
Acceptance date: 2018-05-15
Online publication date: 2019-01-18
Publication date: 2019-03-01
Corresponding author
Nadia Jamil   

College of Earth and Environmental Sciences, University of the Punjab
Pol. J. Environ. Stud. 2019;28(4):2311–2319
The present research deals with the synthesis and viability of Sawdust biochar/Fe3O4 nanocomposite toward textile waste water treatment. The structure, functionality, and morphology of the nanocomposite were determined by FT-IR, powder XRD, and SEM. Removal of the textile dye Reactive Blue 21 (RB21) was almost 75% under optimum conditions. The value of Langmuir dimensionless separation factor RL indicated a favorable adsorption (0 < R L < 1). Langmuir constant (KL, i.e., 0.15) symbolizes that there is high affinity of the adsorbent for the adsorbate. The value of Freundlich constant was found to be 2.78 (n>1), hence denoting favorable sorption. The negative values for free energy indicated a spontaneous reaction. Positive value for enthalpy suggested the endothermic nature of adsorption. The kinetic data showed a pseudo first-order kinetic model. The calculated value of qt agreed with the experimental value of qt at equilibrium. The results depicted that sawdust biochar/Fe3O4 nanocomposites are efficient adsorbents for removing RB21 and has potential application in treatment of textile wastewater.