Sulfur-based intercalated hydrotalcite modified charcoal-based adsorption material and preparation and application thereof

An adsorption material, biochar technology, applied in water pollutants, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of small adsorption of yin and yang HMs ions, increased hydrotalcite loading, and poor adsorption performance. Achieve broad industrial application prospects, improve load stability, and enhance the effect of stability
CN114082403APending Publication Date: 2022-02-25HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2022-02-25

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Abstract

The invention belongs to the technical field of wastewater treatment and soil remediation, and particularly relates to a sulfur-based intercalated hydrotalcite modified charcoal-based adsorption material and preparation and application thereof. The preparation method comprises the following steps: dipping a biomass raw material in an alkali liquor, carrying out pyrolysis carbonization to obtain an activated biochar material, carrying out hydrotalcite loading under a hydrothermal condition by taking the biochar material as a substrate, and finally replacing interlayer anions of hydrotalcite with sulfenyl anions. The adsorbent obtained by the preparation method not only has the adsorption capacity of independent biochar and hydrotalcite on heavy metals, but also can obtain a loose and porous biochar material by activating a biomass material, and then the biochar material can be further expanded through a hydrothermal reaction, and the loading capacity and the loading stability of the hydrotalcite are improved; finally, the adsorption capacity of the heavy metal anions is remarkably improved through interlayer replacement of the sulfenyl anions.
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Description

technical field

[0001] The invention belongs to the technical field of wastewater treatment and soil remediation, and more specifically relates to a sulfur-based intercalation hydrotalcite-modified biochar-based adsorption material, its preparation and application. Background technique

[0002] With the rapid development of the economy, the demand for basic industrial products in various industries has increased sharply, such as steelmaking, leather, semiconductors, etc., and a large amount of pollutants will inevitably be produced in the production process. Among them, heavy metals (HMs) pollution has attracted extensive attention from researchers due to its high toxicity, difficulty in remediation, and long residence time. In addition, if heavy metal pollution is not treated in time, it will spread to groundwater and soil, and further enrich in organisms and plants, threatening the safety of food and drinking water, and seriously affecting the living environment of human b...

Claims

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