METHOD FOR PREPARING SELENIUM-ENRICHED MODIFIED BIOCHAR FOR CADMIUM ADSORPTION

Disclosed is a method for preparing selenium-enriched modified biochar for cadmium adsorption. Selenium-enriched rice husks are impregnated in a hydrochloric acid solution of CaCl2 for 20 to 24 h, and the impregnated selenium-enriched rice husks are dried, and then carbonized at a carbonization temp...

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Bibliographic Details
Main Author SHAN Dexin
Format Patent
LanguageEnglish
Published 15.04.2024
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:Disclosed is a method for preparing selenium-enriched modified biochar for cadmium adsorption. Selenium-enriched rice husks are impregnated in a hydrochloric acid solution of CaCl2 for 20 to 24 h, and the impregnated selenium-enriched rice husks are dried, and then carbonized at a carbonization temperature of 300°C to 700°C for 0.5 to 1.5 h. The selenium- enriched biochar prepared in the disclosure has a specific surface area of 31.79 m2/g. After modification, the selenium element in the biochar plays a special role in promoting the adsorption of Cd2+, and cooperates with other multiple mechanisms to improve the adsorption performance of heavy metal Cd2+ in wastewater, and an adsorption capacity for Cd2+ with a concentration of 100 mg/L is 51.7 mg/g.
Bibliography:Application Number: LU20230506396