AI Article Synopsis
- The study investigated the effectiveness of three materials—acid-activated organobentonite (OAB), calcium alginate (A), and a composite bead (A-OAB)—in removing methylene blue dye from water.
- The researchers evaluated various factors like pH, temperature, and initial dye concentration, finding that the maximum adsorption capacities at 25°C were 263.80 mg/g for OAB, 483.6 mg/g for A, and 799.43 mg/g for A-OAB.
- Results showed that the adsorption could be described by the pseudo-second-order kinetic model and suggested that A-OAB is a cost-effective option for removing dyes from wastewater, with a slight decrease in efficiency after multiple uses.
Article Abstract
In this study, acid-activated organobentonite (OAB), calcium alginate (A) and calcium alginate/acid-activated organobentonite composite beads (A-OAB) were prepared and applied for the removal of methylene blue from solutions in batch system. The zero point charge of pH (pH), Scanning electron microscopy (SEM) and Fourier transformed infrared spectroscopy (FTIR) analysis were carried out. The effects of pH solution (2-11), temperature (15, 25, 35 and 45°C), initial concentration (20-500mg/L), and contact time were investigated. The adsorption processes fitted well with the pseudo-second-order kinetic model and both models Langmuir and Chapman isotherms. Results showed that the maximum adsorption capacities of (OAB), (A) and (A-OAB) for the adsorption of MB were 263.80, 483.6 and 799.43mg/g at 25°C, respectively. Thermodynamic studies showed spontaneous and endothermic nature of the overall adsorption process. Desorption tests showed that the removal efficiency of MB decreased from 95 to 89.7% after six regeneration cycles for (A-OAB). From this, (A-OAB) can be utilized as an economical adsorbent for the removal of basic dyes from the contaminated waste water.
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| http://dx.doi.org/10.1016/j.ijbiomac.2016.08.013 | DOI Listing |
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