Check patentability & draft patents in minutes with Patsnap Eureka AI!

Preparation method of biochar/hydrotalcite-like compound

A biochar and hydrotalcite technology, applied in the field of soil remediation, can solve problems such as easy agglomeration, less research on contaminated soil remediation, and affect cadmium removal effect, etc., and achieve the advantages of cheap raw materials, simple preparation process, and good curing effect Effect

Inactive Publication Date: 2019-02-22
SOUTHEAST UNIV
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers at home and abroad have studied hydrotalcite as an adsorbent, mainly focusing on the study of hydrotalcite composed of different components and its modified materials to treat pollutants in water and the atmosphere, such as adsorption and removal of Cd in water. 2+ 、Cu 2+ , Pb 2+ heavy metal ions and CO 2 The removal of contaminated soil is less studied
The active group -OH on the surface of hydrotalcite-like is prone to agglomeration through hydrogen bond interaction, which affects its removal effect on cadmium

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of biochar/hydrotalcite-like compound
  • Preparation method of biochar/hydrotalcite-like compound
  • Preparation method of biochar/hydrotalcite-like compound

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the composite material provided by this method comprises the following steps:

[0021] (1) Biomass pretreatment: wash the biomass with deionized water, filter, place in an oven to dry, and seal for subsequent use;

[0022] (2) Preparation of biochar: mix the biomass in step (1) with potassium hydroxide (mass ratio: 1:1-1:3) solution, stir in a water bath at 40-80°C for 6-12 hours, dry, Put it into a tube furnace for carbonization at 600-800°C for 1-2 hours, wash with water until neutral, and dry to obtain biochar;

[0023] (3) Preparation of the complex: Weigh 0.25-0.75 g of the biochar prepared in step (2), add it to 50-100 mL of a mixed solution of two metal salts with a certain molar ratio, and add the alkaline solution dropwise until the pH is 9-11. Finally, the obtained slurry is hydrothermally treated at 60-140° C. for 24-48 hours, centrifuged, washed with water, dried, ground, and sieved to obtain a biochar / hydrotalcite-like composite. ...

Embodiment example 1

[0031] Rice husks were used as biomass raw materials, washed, dried, crushed, mixed with potassium hydroxide solution at a mass ratio of 1:3, stirred in a water bath at 40°C for 8 hours, dried, reacted in a tube furnace at 800°C for 1 hour, washed with water until Neutral, biochar is obtained after drying.

[0032] Weigh 0.25-0.75 g of the prepared biochar, configure it with magnesium nitrate and iron nitrate (3:1 molar ratio) to form a mixed solution, add dropwise a mixed solution of sodium hydroxide and sodium carbonate until the pH is 9-11, Finally, the obtained slurry was hydrothermally reacted at 80° C. for 24 hours, centrifuged, washed with water, dried, ground, and sieved to obtain a biochar-hydrotalcite-like composite.

[0033] In wave number (cm -1 ) is the abscissa, the light transmittance T (%) is the ordinate, and the FTIR spectrum of the composite is drawn. Such as figure 2 Shown at 3500-3600cm -1 The absorption band at , represents the absorption peak of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a biochar / hydrotalcite-like compound that reduces available cadmium in soil and particularly relates a biochar / hydrotalcite-like compound prepared by using low-price easy-to-access biomass as a raw material to prepare biochar by activating and charring, adding a metal salt and an alkaline solution on such basis, and carrying out hydrothermal reaction. The biochar / hydrotalcite-like compound prepared herein allows solid wastes to be recycled; when the biochar / hydrotalcite-like compound is applied to remove cadmium in soil, the presence of little biochar helps effectively avoid hydrotalcite-like agglomeration, increase contact area for a solidifying agent and the heavy metal cadmium, and therefore, improve the solidification effect for the available cadmium in soil; the materials are low in price and easy to access, the preparation process is simple and suitable for batch production, and technical support is provided for industrial production of soil heavy metal solidifying agents.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a preparation method of a biochar-hydrotalcite-like compound capable of reducing effective cadmium in soil. Background technique [0002] Soil cadmium pollution has the characteristics of concealment, long-term and irreversibility, which not only leads to the decline of soil fertility, crop yield and quality, but also easily leads to groundwater pollution. Commonly used heavy metal contaminated soil remediation methods can be divided into: physical remediation, chemical remediation and biological remediation. Among them, the in-situ adsorption and immobilization repair method is a research hotspot in the remediation of heavy metal-contaminated soil in China. Compared with other methods, this remediation method has the advantages of high efficiency, fast repair, low investment, and simple operation. It has a good prospect in the application of contaminated so...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B09C1/00B01J20/30
CPCB01J20/041B01J20/20B09C1/00
Inventor 宋敏曹青青赵炎孟凡跃
Owner SOUTHEAST UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com