Heavy metal removal by biopolymers-based formulations with native potato starch/nopal mucilage

The contamination of water bodies by heavy metals is a critical problem for human health and ecosystems, and it can bioaccumulate in organisms to toxic levels and even lead to the living being’s death. This research aimed to synthesize and characterize a biopolymer with the capacity to remove heavy...

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Published in:Revista Facultad de Ingeniería 2022-04 (103), p.44-50
Main Authors: Choque-Quispe, David, Ramos-Pacheco, Betsy Suri, Ligarda-Samanez, Carlos Alberto, Barboza-Palomino, Gloria Inés, Kari-Ferro, Aydeé, Taipe-Pardo, Fredy, Choque-Quispe, Yudith
Format: Article
Language:English
Subjects:
Adsorption
Altitude
Bioaccumulation
Biopolymers
Caustic soda
ENGINEERING, MULTIDISCIPLINARY
Ethanol
Functional groups
heavy metal removal
Heavy metals
Hydrochloric acid
Lead
Mercury (metal)
Metals
native potato starch
nopal mucilage
Phosphate esters
Pollutants
Potatoes
Solubility
Spectrum analysis
Synthesis
Variance analysis
Wastewater treatment
Water treatment
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Summary:The contamination of water bodies by heavy metals is a critical problem for human health and ecosystems, and it can bioaccumulate in organisms to toxic levels and even lead to the living being’s death. This research aimed to synthesize and characterize a biopolymer with the capacity to remove heavy metals in wastewater, elaborated from potato starch, glycerin, and nopal mucilage. Native potato starch of the Allcca sipas variety was extracted by conventional methods; the mucilage was extracted with ethanol. Four formulations of biopolymers were synthesized at 60 and 70 °C. The solubility, structural characteristics, and adsorption capacity of heavy metals were evaluated. Starch, mucilage, and biopolymers presented predominant functional groups as -OH, -C-O-, -NH-, -C-H-, -C-OH determined by FTIR, allowing to remove up to 50.18% of Al, 56.81% of As, 35.95% of Cr, 37.43% of Hg and 73.22% of Pb determined through an ICPE-OES, for a contact time of 100 minutes at pH 5.0, heavy metal removal and solubility were significantly influenced (p-value < 0.05) by the addition of starch and mucilage. The synthesized biopolymers present a high capacity for heavy metal removal in wastewater.
ISSN:0120-6230
2422-2844
2422-2844
DOI:10.17533/udea.redin.20201112