Zinc adsorption from aqueous solution using lemon, orange, watermelon, melon, pineapple, and banana rinds

Abstract

In this study, six fruit rind, chemical activated using ZnCl2 and carbonized by microwave, were used as biosorbent to remove zinc from aqueous solution. Fruit kind, microwave treatment time and adsorption contact time effects on zinc biosorption yield were examined. The characterization of raw materials and synthesized biosorbents were realized by Fourier-transform infrared spectroscopy (FT-IR). The dried fruits rinds were activated for 2 or 4 h using ZnCl2 and carbonized for 1, 2, 3 or 4 min at 800 W microwave power. Zinc biosorption yield was determined using ultraviolet-visible spectroscopy (UV-Vis). Maximum zinc biosorption capability was determined 39.18 mg/g for lemon, 35.78 mg/g for orange, 14.76 mg/g for watermelon, 13.06 mg/g for melon, 12.2 mg/g for pineapple and 9 mg/g for banana rinds. The results indicate that the six fruits rinds can be used for zinc adsorption from aqueous solution as cost-effective and environmentally friendly biosorbent with high adsorption efficiency.

Biosorbent Efficacy of Groundnut Husk for the Elimination of Chromium from the Effluent of Mojo Tannery Industry, Ethiopia

“…FTIR spectrum analysis of biosorbent with chromium-loaded RGNH and ATGNH exhibited the broadening of the OH peak and -NH groups at 3475 cm −1 , and OH groups bonded to methyl radical at 2910 cm −1 and peak 625 cm −1 and the peaks at 2348 cm −1 and 3748 cm −1 became broad ( Figure 2 ), whereas in EEGNH, the peaks at 2348 cm −1 and 3748 cm −1 disappeared after biosorption ( Figure 3 ). The broadening and loss of some peaks indicated the alteration of the structure of functional groups in the adsorbents is owing to the interaction of the surface functional groups [ 6 , 23 ]. The observation of a new broader peak in ATGNH ( Figure 3 ) at 3845 cm −1 after biosorption demonstrated its role in the biosorption of total Cr.…”

“…This upsurge in the total Cr biosorption capacity of ATGNH might be owing to the removal of some minerals and organic matter and the exposure of available binding sites for metal biosorption. The study by [ 6 ] vindicated the role of acid pretreatment for the increased number of available binding sites on the surface of the biomass. The pattern of biosorption of metals onto biosorbent is attributable to the active groups and bonds present in them [ 24 ].…”

“…Tese heavy metal pollutants have adverse efects on the environment and human health [3]. Te usage of agro/food wastes and microbes as biosorbents for the removal of toxic heavy metals is being a promising technology [4][5][6].…”

Removal of arsenic from semiarid area groundwater using a biosorbent from watermelon peel waste

“…Biosorption is a technique derived from adsorption. Biosorption has been considered a promising As removal method from groundwater and for other elements [ 17 , 27 , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] ]. In contrast to other conventional procedures, like oxidation, filtration, reverse osmosis, electrokinetics, ion exchange, coagulation, flocculation, or phytoremediation [ 16 , 18 , 19 , 22 , 25 , 36 , [44] , [45] , [46] , [47] , [48] ].…”

Preparation and Characterization of Porous Materials from Pineapple Peel at Elevated Pyrolysis Temperatures

“…On the other hand, the dried biomass waste also contains a lot of lignocellulosic constituents, which are related to contain oxygen-containing functional groups for providing complexation and ion exchange [10]. Therefore, pineapple peel has the potential to be reused as a biosorbent in the removal of cationic pollutants, including zinc [11][12][13], cadmium [14], nickel [15], and dye [16], from aqueous solutions. However, its maximal uptake capacities have been highly associated with its physical properties such as surface porosity and particle size.…”