Vermicompost as a Potential Adsorbent for the Adsorption of Methylene Blue Dye From Aqueous Solutions

Abstract

Vermicompost (VC) as a low cost and waste-derived material was used as an adsorbent to remove textile dye effluents from the wastewater. Methylene blue (MB) was selected as a representative of dye effluents and its adsorption to VC was investigated. The effect of parameters such as pH, adsorption time, and the initial concentration of MB were determined via lab-scale batch experiments. The highest adsorption capacity of VC was reached when the pH of the solution was 4. The equilibrium was maintained after 90 minutes of operation since the removal percentage of MB was stabilized at 99%. The pseudo-second-order kinetic model described the most appropriate adsorption kinetic behavior. Both Langmuir (R 2 =0.9891) and Freundlich isotherms (R 2 =0.9895) fitted very well to the experimental data. Based on these results, vermicompost can be evaluated as an alternative adsorbent for the removal of dye effluents.

Ultrasonic-Assisted Removal of Eriochrome Black T onto Vermicompost: Characterization, Isotherm and Kinetic Modelling

“…Vermicompost had 31.05% ash content. The details of ash content determination method were given in our previous work (5).…”

“…The functionality, structural morphology and crystallinity tests of raw vermicompost were performed via Spectrum Two Fourier Transform Infrared (FTIR) Spectrometer , Scanning electron microscope with Energy Dispersive X-Ray spectroscopy (SEM-EDX) and X-Ray Diffraction (XRD) for characterization. Moreover, point of zero charged of VC was determined in our previously published paper (5).…”

“…In addition, dyes containing -N=N-azo group (azo dyes) are considered toxic and carcinogenic and may create serious effects on organisms in the water bodies and human health (3). There is a great variety in treatment of dye effluents in wastewater such as extraction via solvent, separation via membrane, advanced oxidation process, photodegradation, and adsorption (4)(5)(6). All these treatment processes have several advantages and disadvantages, while adsorption is a widely used technique due to its easy applicability, feasibility, and low cost.…”

Progresses and expansions of chitosan-graphene oxide hybrid networks utilizing as adsorbents and their organic dye removal performances: A short review

“…employed in these industries are toxic and disadvantage to the water source (1-6) (Table 1). Specifically, anionic dyes contain negative charges instead of cationic dyes with positive charges in an aqueous solution that is due to the presence of carboxyl and/or sulfonate groups (2,5,6). Among them, the anionic dyes are intensely colored, water-soluble, and manifest acidic features inducing to the most challenging (7,8).…”