OPTIMIZATION STUDY ON ADSORPTION OF METHYLENE BLUE FROM COATING INDUSTRY WASTEWATER BY SUGARCANE BAGASSE BIOCHAR

Noorul Jannah Binti Zainuddin1*, Muhammad Izwan Bin Norman1, Chamarnaa a/p S. Kumaravelu1, Dharshini a/p Jayaraman1, Nurfarahin Syuhaida Binti Olim Mohammad1

1Politeknik Tun Syed Nasir Syed Ismail




ABSTRACT

Purpose: This study introduces an optimization investigation utilizing Response Surface Methodology (RSM) to enhance the adsorption capacity of methylene blue (MB) from wastewater generated by the coating industry. The adsorbent of interest in this research is sugarcane bagasse biochar, recognized for its potential in wastewater treatment due to its abundant availability and favorable adsorption characteristics. Method: A Box-Behnken was used to design the experimental matrix, considering factors such as initial dilution factor (3.2 - 20 %), temperature (25 – 40 ℃), and contact time (1 – 20 hours). Through the execution of the designed experiments, a predictive model was developed to correlate the significant factors and their interactions with MB removal. Furthermore, the physicochemical properties of the produced biochar were investigated through several characterization techniques. Result: The optimization process yielded the following optimum conditions for the adsorption process: a dilution factor of 16.27%, a temperature of 40℃, and a contact time of 1 hour. An in-depth exploration of the physicochemical properties of the produced biochar was conducted, with insights into the functional groups responsible for MB adsorption provided through Fourier Transform Infrared Spectroscopy (FTIR) analysis. Additionally, Scanning Electron Microscopy (SEM) was employed to examine the surface morphology and potential binding sites on the biochar, while particle size analysis assessed the difference in particle size before and after pyrolysis of sugarcane bagasse.


Keywords:

Response Surface Methodology Methylene Blue, Activated carbon, Waste management