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A kind of flexible biomass selenium extraction material and preparation method thereof

A biomass material and biomass technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of serious pollution, selenium selectivity, complex process, high surface reactivity, etc., and achieve favorable adsorption Function, large surface roughness, avoiding the effect that is not easy to recycle

Active Publication Date: 2020-01-24
江阴智产汇知识产权运营有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the existing selenium extraction technology, such as low efficiency of adsorption, extraction and biological separation, high price of selenium separation membrane, high energy consumption, complex process, serious pollution and poor selectivity of selenium in electrolysis; currently , the chemical reduction technology is suitable for the separation of selenium due to its simple operation and environmental friendliness, and has a good application prospect
The strong reducibility of zero-valent nano-iron to selenate and selenite ions has attracted extensive attention of researchers, but the large surface area and high surface reactivity of zero-valent nano-iron make it easy to agglomerate in the liquid phase, and its flow Poor permeability and permeability, high dissolution rate and low separation efficiency

Method used

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  • A kind of flexible biomass selenium extraction material and preparation method thereof
  • A kind of flexible biomass selenium extraction material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Prepare a NaOH solution with a concentration of 5 wt%, and add 8 g of sisal per 100 mL of NaOH solution, cut the sisal into pieces and add it to the NaOH solution. In an environment of 60 °C, after stirring for 4 h, it was taken out and cooled to room temperature, washed with distilled water until neutral, and dried to obtain a biomass cellulose precursor.

[0029] (2) Prepare NaClO with a concentration of 5 wt% 2 solution, and adjust the pH to 4 with glacial acetic acid to obtain NaClO 2 Mixture. Per 100 mL NaClO 2 Add 5 g of biomass cellulose precursor to the mixed solution, and add the biomass cellulose precursor to NaClO 2 The mixture was stirred in the environment of 60 °C for 4 h, then taken out and cooled to room temperature, washed with distilled water until neutral, and dried to obtain biomass cellulose.

[0030] (3) Add 10 g of biomass cellulose to 100 mL of deionized water, stir mechanically to form a paste-like slurry, and after ultrasonic treatment,...

Embodiment 2

[0035] (1) Prepare a NaOH solution with a concentration of 1 wt%. Add 2 g of jute per 100 mL of NaOH solution, cut jute into pieces and add it to the NaOH solution. In an environment of 60 °C, after stirring for 1 h, take it out and cool it to room temperature, wash it with distilled water until it is neutral, and dry it to obtain a biomass cellulose precursor.

[0036] (2) Prepare NaClO with a concentration of 1 wt% 2 solution, and adjust the pH to 2 with glacial acetic acid to obtain NaClO 2 Mixture. Per 100 mL NaClO 2Add 2 g of biomass fiber precursor to the mixed solution, and add the biomass fiber precursor to NaClO 2 The mixture was stirred in the environment of 60 °C for 1 h, then taken out and cooled to room temperature, washed with distilled water until neutral, and dried to obtain biomass cellulose.

[0037] (3) Add 5 g of biomass cellulose to 100 mL of deionized water, stir mechanically to form a paste slurry, and after ultrasonic treatment, apply the paste slur...

Embodiment 3

[0042] (1) A KOH solution with a concentration of 10 wt% was prepared, and 8 g of green hemp was added to every 100 mL of KOH solution, and the green hemp was chopped and added to the KOH solution. In an environment of 100 °C, after stirring for 4 h, it was taken out and cooled to room temperature, washed with distilled water until neutral, and dried to obtain a biomass cellulose precursor.

[0043] (2) Prepare NaClO with a concentration of 10 wt% 2 solution, and adjust the pH to 6 with glacial acetic acid to obtain NaClO 2 Mixture. Per 100 mL NaClO 2 Add 20 g of biomass fiber precursor to the mixed solution, and add the biomass fiber precursor to NaClO 2 The mixed solution was stirred for 4 h in an environment of 100 °C, then taken out and cooled to room temperature, washed with distilled water until neutral, and dried to obtain biomass cellulose.

[0044] (3) Add 25 g of biomass cellulose to 100 mL of deionized water, stir mechanically to form a paste-like slurry, and af...

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Abstract

The invention relates to a flexible biomass selenium extracting material and a preparation method thereof, and belongs to the field of chemical separation materials; the specific steps are as follows:using modified biomass carbon fiber as a substrate, using a hydrothermal process to grow a layer of nano-FeOOH in situ on the surface of the substrate, and reducing the FeOOH on the surface of the modified biomass carbon fiber to zero-valent nano iron to obtain the flexible biomass selenium extracting material; the flexible biomass selenium extracting material prepared by the method has rich porestructure, large specific surface area, is favorable for adsorption, and has good adsorption amount and adsorption rate in chemical adsorption of selenate ions.

Description

technical field [0001] The invention relates to a selenium-extracting material and a preparation method thereof, in particular to a flexible biomass selenium-extracting material and a preparation method thereof, belonging to the field of chemical separation materials. Background technique [0002] Plant cellulose is a natural renewable resource. After billions of years of evolution by nature, plant cellulose has formed a unique structure and properties. In recent years, with the aggravation of various environmental pollution problems, how to make full use of environmentally friendly biomass materials such as plant cellulose has become the focus of research. At present, plant cellulose has been widely used in various aspects such as food, medicine, papermaking, electronics, wastewater treatment, etc. In order to make full use of the structure of plant cellulose, the cellulose fiber can be carbonized, the overall structure of the fiber remains unchanged, and the specific surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28038B01J2220/485
Inventor 张涛刘煜杨冬亚邱凤仙潘建明戴玉婷
Owner 江阴智产汇知识产权运营有限公司