Removal and recovery of gallium ion from solution by insoluble amphoteric starches

Journal Article · Fri Dec 10 00:00:00 EST 1993 · Journal of Applied Polymer Science; (United States)

DOI:https://doi.org/10.1002/app.1993.070501008· OSTI ID:5641992

Chan, Wuchung ^[1]

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1. Chung-Hua Polytechnic Inst., Hsinchu (Taiwan, Province of China). Civil Engineering Dept.

The removal and recovery of gallium ion (Ga[sup +3]) from a solution with the high cross-linked amphoteric starches containing the phosphate anionic group and the quaternary ammonium or tertiary amine cationic group was investigated. The adsorption capacity of tertiary amine phosphate starch (TAP) and quaternary ammonium phosphate starch (QAP) is 0.54 and 0.48 meq/g, respectively. The adsorption process has been found to be concentration dependent and endothermic, and follows the Langmuir isothermal adsorption. The heat of adsorption ([Delta]H) is equal to 7.65 kcal/mol for the QAP and equal to 7.84 kcal/mol for the TAP. The percentage of adsorbed Ga[sup +3] ion decreases when HCl, H[sub 2]SO[sub 4], NaCl, or Na[sub 2]SO[sub 4] is added to the solution. The Ga[sup +3] ion adsorbed on the adsorbents can be recovered by treating with an NaOH or HCl solution; the maximum percentage of recovery is about 70% when 1M NaOH solution is used.

• OSTI ID: 5641992
• Journal Information: Journal of Applied Polymer Science; (United States), Vol. 50:10; ISSN 0021-8995
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
GALLIUM
MATERIALS RECOVERY
STARCH
SORPTIVE PROPERTIES
WASTE WATER
DECONTAMINATION
ADSORPTION ISOTHERMS
AQUEOUS SOLUTIONS
WATER POLLUTION
CARBOHYDRATES
CLEANING
DISPERSIONS
ELEMENTS
HYDROGEN COMPOUNDS
ISOTHERMS
LIQUID WASTES
MANAGEMENT
METALS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
POLYSACCHARIDES
PROCESSING
REAGENTS
SACCHARIDES
SOLUTIONS
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)