Arsenic adsorption material and preparation and recycling method thereof

A technology of adsorption materials and biomass materials, which is applied in the field of arsenic adsorption materials and its preparation and recycling, can solve the problem of low conversion rate, achieve good recyclable characteristics, easy recycling, and easy recycling and reuse effects

Pending Publication Date: 2022-06-07
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of converting LDH to LDO and then adsorbing it into LDH is generally considered to be the chemical memory effect of LDH / LDO, but its conversion rate is not high, and it needs to be improved as a recyclable adsorption material.

Method used

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  • Arsenic adsorption material and preparation and recycling method thereof
  • Arsenic adsorption material and preparation and recycling method thereof
  • Arsenic adsorption material and preparation and recycling method thereof

Examples

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preparation example Construction

[0040] see figure 1 , a preparation method of arsenic adsorption material, comprising:

[0041] After drying and pulverizing the biomass material, it is dispersed in the carbonate-containing alkaline solution according to the set concentration to obtain suspension A;

[0042] The metal cation mixed solution B of the set concentration is added dropwise to the suspension A at a set rate, and the biomass-loaded layered double metal hydroxide is obtained through mineralization and centrifugal separation;

[0043] The biomass-loaded layered bimetallic hydroxide is pyrolyzed anaerobic to obtain an arsenic adsorption material, which is the biochar-supported layered bimetallic oxide.

[0044] It should be noted that the biomass material can be one of orange peel, bagasse, and rice straw; usually, orange peel can be used. Of course, it can also be waste, tailings, etc. of other agricultural biomass, which is convenient for resource reuse.

[0045] In order to facilitate the reaction...

Embodiment 1

[0061] Prepare 750mL of mixed solution A of 0.9mol / L sodium hydroxide and 0.1mol / L sodium carbonate; weigh 40g of dry orange peel powder, stir and disperse in mixed solution A to obtain suspension A; prepare 750mL of 0.2mol / L Mixed solution B of ferric nitrate and 0.6 mol / L magnesium nitrate; mixed solution B was added dropwise to suspension A at a rate of 5 ml / min through a peristaltic pump; Through centrifugation, drying and grinding, solid component A, that is, biomass-loaded layered double metal hydroxide, was obtained; the solid component A was placed in a tube furnace for high-temperature anaerobic cracking, the cracking temperature was 550 °C, and the temperature was programmed for 10 ℃ / min, the cracking time is 2h, the anaerobic atmosphere is N 2 , to obtain an arsenic adsorption material, that is, biochar-supported layered bimetallic oxides.

Embodiment 2

[0063] Compared with Example 1, the main difference is that the biomass selects bagasse, as follows:

[0064] Prepare 750mL of mixed solution A of 0.9mol / L sodium hydroxide and 0.1mol / L sodium carbonate; weigh 40g of dry bagasse powder, stir and disperse in mixed solution A to obtain suspension A; prepare 750mL of 0.2mol / L Mixed solution B of ferric nitrate and 0.6 mol / L magnesium nitrate; mixed solution B was added dropwise to suspension A at a rate of 5 ml / min through a peristaltic pump; The solid component A was obtained by centrifugation, drying and grinding; the solid component A was placed in a tube furnace for high-temperature anaerobic cracking, the cracking temperature was 550 °C, the temperature was programmed at 10 °C / min, the cracking time was 2 h, and the anaerobic atmosphere was N 2 , to obtain arsenic adsorption materials.

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Abstract

The invention belongs to the technical field of adsorbing materials, solid waste resource utilization and wastewater treatment, and discloses an arsenic adsorbing material and a preparation and recycling method thereof. The preparation method of the arsenic adsorption material comprises the following steps: drying and crushing a biomass material, and dispersing the biomass material in a carbonate-containing alkaline solution according to a set concentration to obtain a suspension A; dropwise adding a metal cation mixed solution B with a set concentration into the suspension A at a set rate, and performing mineralization and centrifugal separation to obtain biomass-loaded layered double hydroxides; and carrying out high-temperature anaerobic cracking on the biomass-loaded layered double-metal hydroxide to obtain the arsenic adsorption material, namely the charcoal-loaded layered double-metal oxide. The maximum adsorbing capacity of the adsorbing material to arsenic ions reaches 49.9 mg / g, and after adsorbing arsenic, the adsorbing material can be desorbed and reconstructed in a set carbonate solution and is recycled through high-temperature anaerobic cracking again.

Description

technical field [0001] The invention belongs to the technical field of arsenic adsorption material and solid waste resource utilization and wastewater treatment, and particularly relates to an arsenic adsorption material and a method for preparing and recycling the same. Background technique [0002] With the improvement of the national economy and the increase of agricultural output, a large amount of agricultural waste needs to be disposed of and reused. Taking the citrus industry as an example, the annual output of citrus waste in the world has reached 120 million tons. How to rationally utilize agricultural waste and effectively utilize its resource properties is a frontier issue in the current world. Anaerobic pyrolysis of waste biomass can further obtain the heat, oil and gas produced by it, and solve the energy crisis. Biochar, the product of anaerobic pyrolysis of biomass, has been confirmed by many studies and can be used in energy storage materials and photovoltaic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/06C02F1/283C02F1/281B01J2220/485C02F2101/103Y02P10/20
Inventor 李江山廖帅薛强冯晨向罗京黄啸
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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