Abstract
In these studies, removal of Fe(III) ions by biosorption processes from aqueous solutions was carried out using paprika (Capsicum annuum L.) pomace generated during processing in the food industry. The biosorbent material was characterized using several analytical methods, including particle size distribution, XRD, SEM–EDS, electrokinetic zeta potential, surface area analysis (BET, BJH), thermogravimetry, morphology (SEM), spectrophotometry FT-IR. Several factors, such as biosorbent dosage, initial concentration, contact time and initial pH were analyzed to show an effect on the bioremoval process, efficiency and adsorption capacity. As a result, the maximum adsorption efficiency and capacity were determined to be 99.1% and 7.92 mg/g, respectively. Based on the kinetics analysis, the bioremoval process is better described by the Langmuir isotherm model and the pseudo-second order equation model. In conclusion, the achieved research results suggest that paprika biomass can be an effective material for efficiently removing iron(III) from wastewater and improving water quality. These studies on the recovery of iron metal from the environment fit in the latest trends in the concept of the global circular economy.
Highlights
Heavy metals are considered to be one of the most dangerous pollutants occurring in the marine environment, inland waters, as well as in the terrestrial environment
The purpose of the research was to investigate the possibility of bioremoval of Fe(III) ions from water by paprika (Capsicum annuum L.) pomace obtained from the processing in the food industry in Poland under different conditions of initial concentration, biosorbent dosage, contact time and initial pH
Paprika waste (Capsicum annuum L.) obtained during processing in the food industry in Poland was used for examining the possibility of removing Fe(III) ions from aqueous solutions
Summary
Heavy metals are considered to be one of the most dangerous pollutants occurring in the marine environment, inland waters, as well as in the terrestrial environment. Their increasing amounts are emitted into the natural environment due to globalization, rapid development of industry and technology. Journal of Material Cycles and Waste Management (2021) 23:248–258 and others These types of biomass are rich in chemical components that are capable of binding metal ions effectively, including polysaccharides (e.g., alginic acid, pectic acid, chitosan), polyphenols (e.g., tannin, catechin) and proteins. Lignin itself poorly adsorbs metal ions, while its interaction with phenol or polyphenol compounds causes much better adsorption capacity [6]
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