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Sulfide reduction modified biochar as well as preparation method and application thereof

A biochar and sulfide technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of rare modification of biochar, and achieve the advantages of less environmental pollution, simple operation steps and improved adsorption capacity. Effect

Active Publication Date: 2020-01-03
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the modified biochars produced by these methods are suitable for the removal of heavy metal ions in wastewater, while the modified biochars for the adsorption of organic pollutants in wastewater are relatively rare.

Method used

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  • Sulfide reduction modified biochar as well as preparation method and application thereof
  • Sulfide reduction modified biochar as well as preparation method and application thereof
  • Sulfide reduction modified biochar as well as preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of sulfide reduction modified biochar, comprising the following steps:

[0036] 1) Preparation of biochar suspension: under oxygen-limited conditions, the bio-organic material was heated at 300°C for 4 hours, ground for 1 hour, and passed through a 100-mesh sieve to obtain biochar raw material (BC), which was added to In ultrapure water, ultrasound was applied for 30 minutes, followed by nitrogen gas for 30 minutes to obtain a stable biochar suspension, wherein the bioorganic material was cypress wood chips, and the mass fraction of the biochar raw material was the same as that of the supernatant that was added to the biochar raw material. The ratio of volume parts of pure water is 1:450;

[0037] Preparation of sulfur reduction modification solution: put the sulfide salt into the deoxidized ultrapure water, stir until completely dissolved to obtain a sulfur reduction modification solution, wherein the concentration of the sulfide salt in the sulfur...

Embodiment 2

[0050] A preparation method of sulfide reduction modified biochar, comprising the following steps:

[0051] 1) Preparation of biochar suspension: under oxygen-limited conditions, heat the bio-organic material at 500°C for 2 hours, grind for half an hour, pass through a 50-mesh sieve to obtain a stable biochar raw material, and add the biochar raw material to the super Ultrasound in pure water for 30 minutes, and then nitrogen for 60 minutes to obtain a biochar suspension, wherein the bio-organic material is wheat straw, the mass fraction of the biochar raw material and the volume of ultrapure water added to the biochar raw material The ratio of copies is 1:450;

[0052] Preparation of sulfur reduction modification solution: Put the sulfide salt into the deoxidized ultrapure water, stir until completely dissolved to obtain the sulfur reduction modification solution, wherein the concentration of the sulfide salt in the sulfur reduction modification solution is 0.1mol / L , the su...

Embodiment 3

[0057] A preparation method of sulfide reduction modified biochar, comprising the following steps:

[0058] 1) Preparation of biochar suspension: Under oxygen-limited conditions, keep the bio-organic material at 400°C for 3 hours, grind for half an hour, pass through a 200-mesh sieve to obtain a stable biochar raw material, and add the biochar raw material to the super Ultrasound in pure water for 30 minutes, and then nitrogen for 60 minutes to obtain a biochar suspension, wherein the bio-organic material is peanut shells, the mass fraction of the biochar raw material and the volume of ultrapure water added to the biochar raw material The ratio of copies is 1:450;

[0059] Preparation of sulfur reduction modification solution: put the sulfide salt into the deoxidized ultrapure water, stir until completely dissolved to obtain a sulfur reduction modification solution, wherein the concentration of the sulfide salt in the sulfur reduction modification solution is 0.05mol / L , the ...

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Abstract

The invention discloses sulfide reduction modified biochar as well as a preparation method and application thereof. The preparation method comprises the following steps: 1, performing heat preservation on a biological organic material at 300-700 DEG C for 2-4 h under oxygen limit condition, performing grinding for at least half an hour, performing sieving to obtain a charcoal raw material, addingthe charcoal raw material into ultrapure water, performing ultrasonic treatment for at least 30 min, introducing nitrogen for at least 30 min to obtain a charcoal turbid liquid; 2, adding a sulfur reduction modified solution obtained in the step (1) into the charcoal turbid liquid, performing stirring for at least 5 h under the condition of introducing nitrogen, and performing suction filtration to obtain the sulfide reduction modified charcoal. The preparation method has simple operation steps and mild reaction conditions; and the whole operation process is performed under the conditions of normal temperature and normal pressure, so that the safety is high, and the environmental pollution is small.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to a sulfide reduction modified biochar and its preparation method and application. Background technique [0002] As a new type of environmental functional material, biochar has a large number of micro-pore structures and high specific surface area, and it can be used as an adsorbent in the water environment to show a good adsorption and removal effect on environmental estrogen and other organic pollutants. The study found that the biochar treated with different reducing agents or oxidizing agents will have a certain degree of change in both the type and quantity of surface functional groups and the size of surface pores, so as to achieve a more ideal adsorption effect. Therefore, many scholars regard modified biochar as an ideal adsorbent and study its adsorption effect on various pollutants in the environment. [0003] In the existing resear...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/32C02F101/34
CPCB01J20/20B01J20/0285C02F1/281C02F2101/345C02F2101/327
Inventor 王方高茗烨王中良
Owner TIANJIN NORMAL UNIVERSITY