Abstract
This study is on the adsorption of indigo carmine dye by composite activated carbons prepared from banana pseudo stems and plastic waste. The activated carbons named TB1P1, TB1P1h and TB2P1 were obtained by pyrolysis at 700°C under steam of raw materials at different ratios (1:1 and 2:1). They were characterized by different techniques such as SEM/EDX, Raman Spectroscopy, FTIR, XRD, TGA/DTA and BET/BJH. Analyses indicate amorphous structures with specific surface areas of 424.37; 385.45 and 338.84 m2/g for TB1P1, TB1P1h and TB2P1 respectively. The study of the adsorption of indigo carmine dye by these adsorbents was carried out by varying parameters such as contact time, mass of adsorbent and initial concentration of the dye. The maximum retention is 94.71%, 86.18% and 84.17% for TB1P1, TB1P1h and TB2P1 respectively after 60 min of stirring, for a pH = 4.6 using 0.6 g of adsorbents. The adsorption of indigo carmine follows well, the Langmuir model, with the most suitable kinetics as pseudo second order.
Highlights
The intensive use of dyes in cosmetic, textile, pharmaceutical, leather, plastic and paper industries [1], makes them among the most abundant pollutants encountered in the environment
This study is on the adsorption of indigo carmine dye by composite activated carbons prepared from banana pseudo stems and plastic waste
Fourier transform infrared (FTIR) analysis was performed using a mixture of 0.09 g KBr and 0.01 g sample which we analyzed on Vertex 70 brand wavelength device (4000 - 400 nm) with a resolution of 4 cm−1 (32 scans) to determine functional groups of surfaces
Summary
The intensive use of dyes in cosmetic, textile, pharmaceutical, leather, plastic and paper industries [1], makes them among the most abundant pollutants encountered in the environment. Because of their high content of organic matter which is difficult to biodegrade, of suspended matter and even of their coloring, dyes
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