Utilizing banana peduncle as an affordable bio-adsorbent for efficient removal of lead ions from water and industrial effluents

Abstract

The use of efficient biobased materials for the treatment of heavy metal-contaminated wastewater has been demonstrated to be a highly effective method. The natural adsorbent banana peduncle has a lot of potential for treating wastewater because it is renewable, inexpensive, readily available, and environmentally benign. To learn more about the possible uses of these adsorbents, we synthesized them from banana peduncles and studied their shape, crystalline structure, and functional groups. The following parameters were found to be ideal for lead biosorption in batch trials concentrating on Pb (II) removal: a pH of 5, a contact period of 120 min, particle sizes between 240 and 300 mesh, concentrations at 40 mg/L, dosages of 3 g/L, and agitation rates of 200 revolutions per min (RPM). The banana peduncle showed an amazing biosorption efficiency of 94.0 % in the results. A comparison was made between the Freundlich, Langmuir, and Temkin models to investigate the adsorption isotherms of lead (II) ions. The R2 values obtained for these models were 0.9946, 0.9769, and 0.9537, respectively. Models that were pseudo-second-order and first-order were evaluated; the latter showed a better fit. The effectiveness and affordability of banana peduncle as the best adsorbent were highlighted by desorption testing. This study shows how materials made from banana peduncles can be an effective and sustainable way to reduce heavy-metal pollution in wastewater. This paper is the first to explore the potential absorption of Pb (II) by the peduncle of bananas, based on our current understanding.

Keywords

• Banana peduncle
• Adsorption
• Biobased materials
• Isotherm
• Kinetics model
• Lead