Modification of porous starch for the adsorption of heavy metal ions from aqueous solution

Food Chemistry
Xiaofei MaPeter R Chang

Abstract

Porous starch xanthate (PSX) and porous starch citrate (PSC) were prepared in anticipation of the attached xanthate and carboxylate groups respectively forming chelation and electrostatic interactions with heavy metal ions in the subsequent adsorption process. The lead(II) ion was selected as the model metal and its adsorption by PSX and PSC was characterized. The adsorption capacity was highly dependent on the carbon disulfide/starch and citric acid/starch mole ratios used during preparation. The adsorption behaviors of lead(II) ion on PSXs and PSCs fit both the pseudo-second-order kinetic model and the Langmuir isotherm model. The maximum adsorption capacity from the Langmuir isotherm equation reached 109.1 and 57.6 mg/g for PSX and PSC when preparation conditions were optimized, and the adsorption times were just 20 and 60 min, respectively. PSX and PSC may be used as effective adsorbents for removal of heavy metals from contaminated liquid.

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Citations

Apr 17, 2016·Ecotoxicology and Environmental Safety·F J AlguacilI Garcia-Diaz
May 7, 2016·International Journal of Biological Macromolecules·Liping BaoYong Kong
Jul 11, 2020·Critical Reviews in Food Science and Nutrition·Dayang Norlaila Hj LatipAbd Karim Alias
Dec 10, 2017·Journal of the Science of Food and Agriculture·Hanna StaroszczykPiotr Tomasik
Sep 24, 2020·Foods·Antoni GolachowskiBartosz Raszewski
Dec 10, 2020·International Journal of Biological Macromolecules·Bryan M CórdovaA C Valderrama
Mar 3, 2021·International Journal of Biological Macromolecules·Bryan M CórdovaA C Valderrama
Mar 14, 2021·International Journal of Biological Macromolecules·Eman RagabFatma Mohamed
Jun 7, 2019·International Journal of Biological Macromolecules·Tao LouXuejun Wang
Jul 3, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Youxing LiuTianyu Yang

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