Efficient Removal of Methylene Blue Dye from Aqueous Solution Using a New Biosorbent Derived from Enset (Ensete Ventricosum)

Abstract

In this study, kocho powder, a possible low-cost biosorbent for the efficient removal of MB dye from wastewater is prepared from pseudostem and corm of Enset (Ensete ventricosum). Characteristics of kocho powder were examined by using SEM, TGA, XRD and FTIR to study the surface morphology, functional group and other physico-chemical properties of this newly developed biosorbent. Biosorption experiments were carried out in batch mode to investigate the effects of dosage (0.025–0.2g), pH (2–10), initial concentration of MB (10 to 100 mg/L) and contact time (10 to 120 min).The highest removal efficiency of methylene blue dye (94.2%) was recorded at optimum experimental conditions of biosorbent dosage 0.1g, MB concentration 50 mgL− 1, pH 8, contact time 50min and agitation rate of 200rpm at room. Following the removal study, it was determined that the pseudo-second order kinetics (R2 = 0.997) and Langmuir isothermal (R2 = 0.996) models may well describe the MB dye biosorption process. Furthermore, this newly developed biosorbent was fairly recyclable up to five cycles without significant loss of re-adsorption efficiency (around 9.6% loss) between 1st and 5th cycle. Thus, the findings of this study revealed that a new kocho biomass derived from Ensete Ventricosum can be used as a promising low-cost, environmentally friendly, and efficient biosorbent for the rapid removal of MB from aqueous solutions.

Novel Biomaterial-Derived Activated Carbon from Lippia Adoensis (Var. Koseret) Leaf for Efficient Organic Pollutant Dye Removal from Water Solution

“…To find the time for equilibrium adsorption, the contact time of MB in LA was varied from 15 min to 105 min at a fixed MB concentration of 10 ppm, a dosage of 0.25 g per 50 ml solution, at 25 0 C. The presence of a large number of vacancies on the adsorbent surface that reached saturation at equilibrium is believed to be responsible for the sharp increase in the adsorption capacity at the initial contact time. Due to the lack of active sites for dye biosorption once equilibrium was established, it remains nearly constant [50]. Adsorption reaches maximum, 92.4% for LA activated at 75 min Figure 11a and Table S7.…”