Development of Absorbent Using Amylose-Graphite Composite Electrode for Removal of Heavy Metals

Amylose of captures heavy metals in a box consisting of sugar chains. However, its absorption rate is low in the period of the month scale. Therefore, the electrochemical driving force was used to promote the absorption rate in this research. Amylose was doped with TiO porous graphite electrode. The...

Full description

Saved in:
Bibliographic Details
Published in:Membranes (Basel) 2021-11, Vol.11 (12), p.930
Main Authors: Li, Shuang, Mokhtar, Guizani, Ito, Ryusei, Kawaguchi, Toshikazu
Format: Article
Language:English
Subjects:
absorbent
Absorbents
Absorption
absorption isotherm
Adsorbents
Adsorption
Amylose
Aquatic plants
Cadmium
Carbon
Chemical precipitation
Chloride
Copper
Efficiency
Electrochemistry
Electrodes
Graphite
heavy metal
Heavy metals
Lead
Lead content
Metal ions
Pollutants
Pore size
Potassium
Raman spectroscopy
Silver chloride
Size effects
Spectrum analysis
Surface water
Titanium dioxide
Water treatment
X-ray diffraction
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Amylose of captures heavy metals in a box consisting of sugar chains. However, its absorption rate is low in the period of the month scale. Therefore, the electrochemical driving force was used to promote the absorption rate in this research. Amylose was doped with TiO porous graphite electrode. The composted absorbent was characterized using XRD(X-ray diffraction), SEM (Scanning Electrode Microscopy), Raman spectroscopy, and electrochemical methods. The affinity and maximum absorption amount were calculated using the isotherm method. In this study, Pb , Cu , Cd , and Cr were chosen to demonstrate because these heavy metals are significant pollutants in Japan's surface water. It was found that the maximum absorption was Cu (56.82-mg/L) > Pb (55.89-mg/L) > Cr (53.97-mg/L) > Cd (52.83.68-mg/L) at -0.5 V vs. Ag/AgCl. This is approximately the same order as the hydration radius of heavy metals. In other words, the absorption amounts were determined by the size of heavy metal ions. Subsequently, the mixed heavy metal standard solution was tested; the maximum absorption amount was 21.46 ± 10.03 mg/L. It was inferred that the electrochemical driving force could be shown as the ion size effect in the mixed solution. Despite there being no support for this hypothesis at this time, this study succeeded in showing that the electrochemical driving force can improve the ability of the absorbent.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes11120930