Vermicompost for Indigo Blue and Congo Red Removal

Abstract

The data obtained through this work revealed that the vermicompost is a natural adsorbent able to removal two textile dyes from an aqueous medium. The values of maximum adsorption capacity for congo red (23.25 mg/g) and indigo blue (40.39 mg/g) obtained from the Mathematical Langmuir Model reveal it. The conditions of adsorbent mass, stirring time between adsorbent and dyes were optimized. Additionally, the values of Gibbs free energy demonstrate the predominance of physical interaction between both dyes and vermicompost. Through Langmuir constant values, it was possible to identify similar affinities between both dyes and vermicompost. The value of dimensionless constant indicates favorable adsorptions process. Finally, through physicochemical analysis from scanning electron microscopy and Fourier Transform Infra-Red Spectroscopy, the characteristics of vermicompost were verified revealing essential aspects to efficient adsorbent.

Physicochemical Interaction of Microstructured Drumsticks withSynthetic Dye: The Tailoring of Surface Phenomenon in Technology

“…Table 3 shows the qmax values for the adsorption of CR by various low-cost adsorbents. ln C e Acid-treated pine cone powder 40.19 [25] Neem leaf powder 41.20 [16] Water hyacinth 53.76 [17] Papaya seed powder 216.9 [26] Vernonia amygdalina leaf powder 57.47 [27] Polypyrrole modified Chinese yam peel 86.66 [28] Oxidized jute 12.86 [29] Rambutan peel 6.24 [30] Wheat residue cellulose 18.85 [31] Palm leaf-activated carbon 52.1 [32] Vermicompost 23.25 [33] Orange lemon peel activated carbon 38 [34] Lignin-based magnetic nanoparticles 234.27 [35] Black tea wastes 3.367 [36] Acid-treated durian peels 107.52 [37] 3.4. Adsorption Kinetics…”