The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2023
Filed:
Sep. 18, 2020
Method for preparing biochar from phosphoric acid-modified, and use of biochar in removal of cadmium
Tianjin University, Tianjin, CN;
Bcig Environmental Remediation Co., Ltd., Tianjin, CN;
Guanyi Chen, Tianjin, CN;
Chuanbin Wang, Tianjin, CN;
Chengliang Yang, Tianjin, CN;
Xiangping Li, Tianjin, CN;
Beibei Yan, Tianjin, CN;
Bin Liu, Tianjin, CN;
Juping Liu, Tianjin, CN;
Zhenping Su, Tianjin, CN;
Ding Li, Tianjin, CN;
Xinpei Liu, Tianjin, CN;
Bo Li, Tianjin, CN;
Tianjin University, Tianjin, CN;
BCIG ENVIRONMENTAL REMEDIATION CO., LTD., Tianjin, CN;
Abstract
The disclosure discloses a method for preparing biochar fromand use of the biochar. The method includes: subjectingto lyophilization, then impregnating lyophilizedwith phosphoric acid, and drying to a constant weight; grinding a dried mixture in a mortar, and then subjecting a ground sample to activation treatment in a tube furnace at 400° C. to 1,000° C. under a nitrogen atmosphere; and boiling an obtained solid product with concentrated hydrochloric acid, then washing with ultrapure water, and drying to a constant weight to obtainbiochar. The biochar is used in adsorption of cadmium. The method for removing cadmium usingbiochar provided by the disclosure exhibits an extremely high adsorption and removal capacity for cadmium, with an adsorption capacity of biochar up to 250 mg/g or more.