Method for removing trivalent antimony in aqueous solution by using chitosan modified biochar

A technology of chitosan modification and biochar, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of insufficient removal rate and weak adsorption capacity of trivalent antimony, and achieve the cost of preparation Low, method safety, and the effect of improving adsorption performance

Pending Publication Date: 2021-10-08
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of method utilizing chitosan modified biochar to remove trivalent antimony in aqueous solution, which greatly improves the adsorption performance to Sb(III), and the preparation cost of chitosan modified biochar is low and the method is safe , The process is simple, the modified biochar has a high removal rate of Sb(III) in wastewater, and can effectively realize industrial production, and solves the problem that the existing biochar has a weak adsorption capacity for trivalent antimony in aqueous solution and the removal rate is not high enough question

Method used

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  • Method for removing trivalent antimony in aqueous solution by using chitosan modified biochar
  • Method for removing trivalent antimony in aqueous solution by using chitosan modified biochar
  • Method for removing trivalent antimony in aqueous solution by using chitosan modified biochar

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Embodiment 1

[0034] A method utilizing chitosan modified biochar to remove trivalent antimony in aqueous solution, comprising the following steps:

[0035] Step 1: After pulverizing, sieving and drying the ficus ficus branches, the dried material is subjected to nano-grinding treatment to obtain nano-powder. When performing nano-grinding treatment, a large amount of mechanical energy is applied to the material to change the crystal lattice and Surface properties, so that it is in an activated state, the nano-powder is heated to 500°C at a heating rate of 15°C / min in a pyrolysis device, and then kept for 2 hours, and then taken out after cooling to obtain unmodified biochar;

[0036] Step 2: dissolving chitosan in 2.5% acetic acid solution, the degree of deacetylation of chitosan is above 75%, and ultrasonic stirring until completely dissolved;

[0037] Step 3: Stir a part of the biochar with the above solution for 30 minutes, and ultrasonically mix to obtain a mixed solution;

[0038] Ste...

Embodiment 2

[0042] A method utilizing chitosan modified biochar to remove trivalent antimony in aqueous solution, comprising the following steps:

[0043] Step 1: After pulverizing, sieving and drying the ficus ficus branches, the dried material is subjected to nano-grinding treatment to obtain nano-powder. When performing nano-grinding treatment, a large amount of mechanical energy is applied to the material to change the crystal lattice and Surface properties, so that it is in an activated state, the nano-powder is heated to 500°C at a heating rate of 15°C / min in a pyrolysis device, and then kept for 2 hours, and then taken out after cooling to obtain unmodified biochar;

[0044] Step 2: dissolving chitosan in 2.5% acetic acid solution, the degree of deacetylation of chitosan is above 75%, and ultrasonic stirring until completely dissolved;

[0045]Step 3: Stir a part of the biochar with the above solution for 40 minutes, and ultrasonically mix to obtain a mixed solution;

[0046] Step...

Embodiment 3

[0050] A method utilizing chitosan modified biochar to remove trivalent antimony in aqueous solution, comprising the following steps:

[0051] Step 1: After pulverizing, sieving and drying the ficus ficus branches, the dried material is subjected to nano-grinding treatment to obtain nano-powder. When performing nano-grinding treatment, a large amount of mechanical energy is applied to the material to change the crystal lattice and Surface properties, so that it is in an activated state, the nano-powder is heated to 500°C at a heating rate of 15°C / min in a pyrolysis device, and then kept for 2 hours, and then taken out after cooling to obtain unmodified biochar;

[0052] Step 2: dissolving chitosan in 2.5% acetic acid solution, the degree of deacetylation of chitosan is above 75%, and ultrasonic stirring until completely dissolved;

[0053] Step 3: Stir a part of the biochar with the above solution for 45 minutes, and ultrasonically mix to obtain a mixed solution;

[0054] Ste...

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Abstract

The invention discloses a method for removing trivalent antimony in an aqueous solution by using chitosan modified biochar, and relates to the technical field of wastewater treatment. The method comprises the following steps: 1, ficus microcarpa branches are smashed, sieved and dried, then the dried material is subjected to nano grinding treatment to obtain nano powder, and the nano powder is pyrolyzed to obtain biochar, wherein ficus microcarpa can be replaced with garden plants such as platanus orientalis, photinia serrulata and cinnamomum camphora; and 2, chitosan is dissolved in an acetic acid solution, and ultrasonic stirring is performed until the chitosan is completely dissolved. The chitosan modified biochar greatly improves the adsorption performance on trivalent antimony and has high adsorption stability, so that secondary pollution is reduced, good environmental benefits and economic benefits are achieved in the aspects of reducing antimony pollution in water, realizing waste recycling and the like, and the problem that the adsorption capacity of existing biochar on trivalent antimony in an aqueous solution is weak, and the removal rate is not high enough is solved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a method for removing trivalent antimony in aqueous solution by using chitosan modified biochar. Background technique [0002] Antimony (Sb), as a metalloid with similar chemical properties to arsenic, is widely used in various industrial fields, including dyes, batteries, semiconductors, flame retardant materials, etc. According to reports, my country's antimony output in 2019 reached about 96,000 tons per year, accounting for more than 60% of global antimony production. The production and application of a large number of antimony-containing products has also led to a serious excess of antimony content in wastewater in many places in my country. Antimony pollution in water bodies has been considered an emerging environmental pollution problem in recent years. The toxicity of antimony is closely related to its chemical valence state. The main forms of antimony in wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/20C02F1/283C02F1/288C02F1/286C02F2101/20
Inventor 陈翰博王海龙高玉蓉
Owner FOSHAN UNIVERSITY
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