Optimization of Methylene Blue Dye Adsorption in Fixed Bed Column Packed with Tea Waste via Response Surface Methodology

Novi Sylvia (Department of Chemical Engineering, Malikussaleh University, Lhokseumawe 24351, Aceh|Malikussaleh University|Indonesia)
Rozanna Dewi (Department of Chemical Engineering, Malikussaleh University, Lhokseumawe 24351, Aceh|Malikussaleh University|Indonesia)
Zulnazri Zulnazri (Department of Chemical Engineering, Malikussaleh University, Lhokseumawe 24351, Aceh|Malikussaleh University|Indonesia)
Hendi Setiawan (Department of Chemical Engineering, Malikussaleh University, Lhokseumawe 24351, Aceh|Malikussaleh University|Indonesia)
Dinda Humaira (Department of Chemical Engineering, Malikussaleh University, Lhokseumawe 24351, Aceh|Malikussaleh University|Indonesia)
Mutia Reza (Department of Chemical Engineering, Institut Teknologi Kalimantan, Balikpapan 76127, East Kalimantan|Institut Teknologi Kalimantan|Indonesia)

JURNAL KIMIA SAINS DAN APLIKASI
Vol 26, No 8 (2023): Volume 26 Issue 8 Year 2023

Tea waste is a low-cost alternative material for making adsorbent to remove methylene blue from synthetic dye wastewater perpetually. Optimization of the adsorbent process utilized Response Surface Methodology (RSM) and a continuously operating system in a fixed bed column. The independent variables in the research are X1 (bed height), X2 (contact time), and X3 (flow rate). The dependent variable is Y1 (removal efficiency) with a matrix design by Box-Behnken. The optimum condition of methylene blue (MB) B removal was found at X1=16 cm, X2=90 min, and X3=4 L/min with an adsorption efficiency of 90.45%. After the activation and adsorption of MB dye, the complete FTIR spectrum shows a distinct peak at 2933.7 cm-1. The results of the EDX analysis performed on tea waste reveal the presence of nitrogen (element N) following the adsorption process. This observation strongly suggests that the tea waste has effectively absorbed MB, as nitrogen is a constituent element found in the molecular structure of MB.