ADSORPTIVE REMOVAL OF HAZARDOUS INORGANIC ELEMENTS FROM WATER BY USING ORANGE WASTE

Katsutoshi Inoue

doi:10.22146/ijc.21581

ADSORPTIVE REMOVAL OF HAZARDOUS INORGANIC ELEMENTS FROM WATER BY USING ORANGE WASTE

https://doi.org/10.22146/ijc.21581

Katsutoshi Inoue^(1*)

(1) Department of Applied Chemistry, Saga University, Honjo-machi 1, Saga 840-8502
(*) Corresponding Author

Abstract

Pectic acid contained in some fruits like orange and apple is natural chelating polymeric material, exhibiting excellent adsorption behavior for some cationic metal ions including toxic heavy metals such as lead and copper. In addition, it also exhibits excellent adsorption behavior for some hazardous inorganic anionic species like phosphorus, arsenic and fluoride by loading some high valence cationic metal ions like zirconium(IV) in advance.For the practical application to the removal of these hazardous inorganic elements from various waste water at cheap cost, orange juice residue was employed instead of pure pectic acid. Orange juice residue just after juicing was activated by saponification with small amount of calcium hydroxide to prepare the sorbent.Some hazardous cationic species like lead(II), copper(II) and cadmium(II) were effectively adsorbed on this sorbent, while toxic anionic species like phosphate, arsenate, arsenite and fluoride were also effectively adsorbed on zirconium(IV)-loaded sorbent.

Keywords

Orange waste; Pectic acid; Natural chelating material; Heavy metals; Arsenic; Phosphorus; Adsorption; Removal; Water

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References

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DOI: https://doi.org/10.22146/ijc.21581