Utilization of banana peel for the removal of benzoic and salicylic acid from aqueous solutions and its potential reuse

Abstract

A B S T R A C TWe report on the adsorptive removal of benzoic acid (BA) and salicylic acid (SA) using banana peel (BP), an abundantly available agricultural waste material, for the first time. BP was characterized by proximate analysis, FT-IR, scanning electron microscopy, BET surface area, and XRF. The number of basic sites on BP (4.9 mmol g −1 ) is relatively more than acidic sites (0.75 mmol g −1 ). The Langmuir uptake capacity values obtained are 6.62 mg g −1 for BA and 9.80 mg g −1 for SA. A mechanism for binding acid molecule to the BP surface is proposed.

Preparation and characterization of raw and carbon from banana peel by microwave activation: Application in citric acid adsorption

“…The detailed mechanism of carboxylic acid adsorption onto RBP is discussed in a previous study [26]. The FTIR result shows the interactions between the hydroxyl and amine groups during the adsorption process.…”

“…The peaks at 1717, 1550, and 1264 cm À1 , which are assigned to the carbonyl, nitro, and CH 3 groups initially, have now shifted toward 1723, 1490, and 1241 cm À1 , respectively. The new peak at 1038 cm À1 in CA-loaded MBPC assigned to CÀ ÀN stretching frequencies represents the nitro group, which also favors the adsorption of CA [26,38].…”

“…The RBP was prepared as reported earlier [26]. RBP was collected from a local fruit market in Nagpur, India, and prepared In brief, the RBP was cut into small pieces, sun dried, crushed, and passed through 0.15-0.71-mm sieves.…”

“…However, very limited studies have focused on using RBP for the adsorption of anionic pollutants such as acid black 1 [23], acid blue 25 [24], and some phenolic compounds (at high pH) [25]. In addition, RBP is used for the removal of some carboxylic acids such as benzoic acid [26] and acetic acid [27] from aqueous solution.…”

Use of Biomass Ashes in Agriculture with Reference to Farming Practices in Vidarbha, Maharashtra, India

“…The most commonly applied kinetic models are pseudo-first-order (PFO), pseudo-secondorder (PSO), Elovich (EL), and intraparticle diffusion (IPD) 20 . The adsorption capacity, an important parameter for selection of an adsorbent, is generally calculated from isothermal models.…”