PREPARATION METHOD FOR AND USE OF MAGNETIC STRAW BIOCHAR MATERIAL BASED ON RED MUD ENHANCEMENT - NANJING INSTITUTE OF ENVIRONMENTAL SCIENCES MINI OF ECOLOGY AND ENVIRONMENT OF THE PEOPLES REPUBLIC

Title:

PREPARATION METHOD FOR AND USE OF MAGNETIC STRAW BIOCHAR MATERIAL BASED ON RED MUD ENHANCEMENT

Document Type and Number:

WIPO Patent Application WO/2024/083260

Kind Code:

A1

Abstract:

Disclosed in the present invention are a preparation method for and the use of a magnetic straw biochar material based on red mud enhancement. The preparation method comprises naturally air-drying or drying straw, and then crushing same; drying Bayer process red mud, and crushing same into powder; then mixing the crushed straw and powdery red mud by means of ball milling, so as to prepare a straw-red mud mixed powder; mixing biomass ash rich in alkali metal with water, and extracting the mixture to obtain a biomass ash extracting solution and dealkalized biomass ash solid residues; uniformly mixing and stirring the straw-red mud mixed powder and the biomass ash extracting solution to obtain a pasty mixture, subjecting the pasty mixture to co-pyrolysis in a protective atmosphere, and washing magnetic straw biochar generated by means of co-pyrolysis with water until the magnetic straw biochar is neutral, so as to obtain a red mud enhanced magnetic straw biochar material. The present invention greatly improves the adsorption rate and adsorption capacity of the straw biochar with regard to a typical antibiotic, i.e., fluoroquinolones, and also endows the straw biochar with magnetism, which is beneficial for subsequent separation and recovery.

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Inventors:

LIN XIAOCHEN (CN)
ZHANG HOUHU (CN)
ZHANG SHENGHU (CN)
XU YIFAN (CN)
SUN ZIFEI (CN)
GUO HONGJI (CN)
LI XUEJIAN (CN)
XU YUANSHUN (CN)
ZHANG DAPENG (CN)
WANG LILI (CN)

Application Number:

PCT/CN2023/126748

Publication Date:

April 25, 2024

Filing Date:

October 26, 2023

Export Citation:

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Assignee:

NANJING INSTITUTE OF ENVIRONMENTAL SCIENCES MINI OF ECOLOGY AND ENVIRONMENT OF THE PEOPLES REPUBLIC (CN)

International Classes:

B01J20/20; B01J20/28; B01J20/30; C02F1/28; C02F101/34; C02F101/36; C02F101/38

Foreign References:

CN116474720A	2023-07-25
CN110316783A	2019-10-11
CN101172888A	2008-05-07
CN101306812A	2008-11-19
CN109621897A	2019-04-16
US8361186B1	2013-01-29

Attorney, Agent or Firm:

JIANGSU SUNDY LAW FIRM (CN)

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