APLICAÇÃO DA CASCA DA LARANJA PARA A REMOÇÃO DE METAIS PESADOS: UMA REVISÃO
Palavras-chave:
Heavy metals; Orange peel; Biosorption; Desorption; RecoveryResumo
The pollution of water resources, especially for heavy metals, generates environmental impacts and is constituted as a global concern, both as refers the upward lack this feature and, consequently, the high energy and financial costs linked to their treatment as to the risks posed to the health of living beings. Alternatively, several treatment techniques have been proposed for removal of natural waters metals, highlighting the adsorption technologies. The use of the biosorbents derived from mesocarp of the shell and of different fruits (orange, banana, coconut fiber, among others), have shown very promising results. This paper presents a review of the orange peel viability in the biosorption process, due to the high potential of this fruit inedible biomass to the treatment process of effluents containing heavy metals. In general, studies show that orange peel can be used to replace the activated charcoal trade, which has a high cost, but it is still the most used technique for the removal of metals from contaminated waters. The chemical modification of the orange peel has also shown excellent results for the adsorption of metal ions, however toxicological studies still need to be made about the contamination risks by secondary compounds. Desorption and regeneration of the biosorbent make the process economically viable biosorption since they can recover metals and to reduce the exploitation of reserves.