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Arsenic removal method for preparing bio-adsorbent from traditional Chinese medicine waste residues

A technology of biological adsorbent and traditional Chinese medicine waste residue, applied in the field of materials, can solve the problems of difficult regeneration and recycling of adsorbents, high cost of adsorbents, strong adsorption effect, etc. Effect

Pending Publication Date: 2021-03-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of conventional adsorbents is high and the adsorption between adsorbents and arsenic compounds is strong, so it is difficult to regenerate and recycle the adsorbents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The traditional Chinese medicine dregs of Wushi tea were obtained from the pharmaceutical factory, soaked in deionized water and rinsed repeatedly until the solution had no color, and the residual liquid and dust on the surface of the dregs were washed away to prevent interference with subsequent experiments. Dry the filtered Chinese medicine dregs in an oven at 75° C. for 6 hours, grind the dried Chinese medicine dregs into powder, and pass through a 100-mesh sieve. Store in a sealed bag for later use.

[0026] Get 1g of traditional Chinese medicine dregs and place it in 1.5mol / L FeCl 3 In the modifier, stir at 50°C for 10 hours, then use a vacuum pump to perform suction filtration, and then dry the filter residue at 85°C for 4 hours to obtain modified medicinal residues, and place the modified traditional Chinese medicine in a drying dish for later use.

[0027] Take 1g of the modified traditional Chinese medicine residue and add it to 100ml of the solution with arse...

Embodiment 2

[0029] The traditional Chinese medicine dregs were obtained from the pharmaceutical factory, soaked in deionized water and rinsed repeatedly until the solution had no color, and the residual liquid and dust on the surface of the dregs were washed away to prevent interference with subsequent experiments. Dry the filtered Chinese medicine dregs in an oven at 80° C. for 5 hours, grind the dried Chinese medicine dregs into powder, and pass through a 100-mesh sieve. Store in a sealed bag for later use.

[0030] Get 2g of traditional Chinese medicine dregs and place it in 1.5mol / L FeCl 3 In the modifier, stir at 40°C for 12 hours, then use a vacuum pump to perform suction filtration, and then dry the filter residue at 80°C for 5 hours to obtain modified medicinal residues, and place the modified traditional Chinese medicine in a drying dish for later use.

[0031] Take 1g of the modified Chinese medicine dregs and add it to 100ml of solution with arsenic ion concentration of 1mol / L...

Embodiment 3

[0033] The traditional Chinese medicine dregs were obtained from the pharmaceutical factory, soaked in deionized water and rinsed repeatedly until the solution had no color, and the residual liquid and dust on the surface of the dregs were washed away to prevent interference with subsequent experiments. Dry the filtered Chinese medicine dregs in an oven at 85° C. for 4 hours, grind the dried Chinese medicine dregs into powder, and pass through a 100-mesh sieve. Store in a sealed bag for later use.

[0034] Get 3g of traditional Chinese medicine dregs and place them in 1.5mol / L FeCl 3 In the modifier, stir at 30°C for 14 hours, then use a vacuum pump to perform suction filtration, and then dry the filter residue at 75°C for 6 hours to obtain modified medicinal residues, and place the modified traditional Chinese medicine in a drying dish for later use.

[0035] Take 1g of the modified traditional Chinese medicine residue and add it to 100ml of the solution with arsenic ion con...

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Abstract

The invention discloses an arsenic removal method for preparing a biological adsorbent from traditional Chinese medicine waste residues, which comprises the following steps: washing the traditional Chinese medicine waste residues, performing drying in an oven, taking the traditional Chinese medicine waste residues out, performing pulverizing and screening to obtain waste residue powder; adding theobtained waste residue powder into a FeCl3 solution, performing stirring to react, and performing filtering, cleaning and drying to obtain a biological adsorbent; and adding the obtained biological adsorbent into arsenic-containing waste liquid to be treated, and stirring for reaction to remove arsenic. According to the method, traditional Chinese medicine waste residues obtained after a pharmaceutical process in the traditional Chinese medicine industry is finished are subjected to physicochemical treatment and then modified to obtain the biomass adsorption material, the biomass adsorption material reacts with low-concentration arsenic-containing wastewater, the final arsenic removal efficiency can reach 98%, and compared with other methods, the method is low in cost, raw materials are easy to obtain, the process is simple, and the removal efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for removing arsenic by using traditional Chinese medicine waste residue to prepare a biosorbent. Background technique [0002] Arsenic exists widely in nature, and has many ways to enter the biosphere and food chain, thereby affecting our health and ecological balance. Among them, human production activities are the main way. Human use of arsenic and its various compounds, as well as burning of fossil fuels, soil erosion, mining, etc., make arsenic enter the atmosphere, soil, ocean and land. Due to the wide application of arsenic in metallurgy, chemical industry, glass, pesticides and other fields, a large amount of arsenic diffuses into the environment through exhaust, drainage, dust and slag discharge. So far, arsenic-containing pesticides are widely used in the market. Abroad, arsenic-containing pesticides are mainly used as insecticides, herbicides, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/10
CPCB01J20/24B01J20/0229B01J20/0288C02F1/286B01J2220/4825C02F2101/103
Inventor 张莉李萌萌许瑞
Owner WUHAN INSTITUTE OF TECHNOLOGY
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