Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and preparation method thereof

A selective, trivalent arsenic technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems affecting the accuracy of detection and the breadth of application scope, etc., to broaden the pH value range Effect

Pending Publication Date: 2020-07-03
NANJING UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing adsorption membrane can only adsorb a single metal ion, and is easily affected by the different valence forms of the metal ion, or is easily limited by the pH value of the water quality, which affects the accuracy and quality of the detection. For the problem of wide application range, the present invention provides an adsorption membrane for selectively fixing trivalent arsenic, trivalent antimony, and tetravalent selenium, using mercaptoamino double-modified mesoporous silicon material as the adsorption material, and combining with polyacrylamide The solution is mixed to make a gel film and used in DGT technology, which can selectively fix trivalent arsenic, trivalent antimony or tetravalent selenium, or selectively and simultaneously fix two or more of trivalent arsenic, trivalent antimony and tetravalent selenium , and the pH range of the applicable solution is wide

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and preparation method thereof
  • Adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and preparation method thereof
  • Adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In this example, the preparation method of the mercapto-modified SBA-15 mesoporous silicon material is as follows:

[0058] Step 1, polyethylene oxide-polypropylene oxide-polyoxyethylene triblock copolymer (P123) and concentration are 2mol L by mass volume ratio 1:30 -1 Add hydrochloric acid into a glass Erlenmeyer flask, stir at 40°C for 2h until P123 is completely dissolved. Add tetraethyl orthosilicate (TEOS) dropwise to the mixed solution, stir at a rate of 350r / min for 60min to prehydrolyze TEOS, then add mercaptopropyltrimethoxysilane (MPTMS) dropwise and increase the stirring rate to 500r / min. The silicon contained in the added TEOS accounts for 5% of the moles of P123, and the mercapto groups contained in the MPTMS account for 30% of the total moles of silicon in the mixed solution. The above mixed solution was continuously stirred at 40° C. for 20 h, then transferred to a high-pressure reactor, and crystallized at 100° C. for 24 h. After the product is coole...

Embodiment 2

[0094] In this example, the preparation method of the mercapto-modified SBA-15 mesoporous silicon material is as follows:

[0095] Step 1, polyethylene oxide-polypropylene oxide-polyoxyethylene triblock copolymer (P123) and concentration are 2mol L by mass volume ratio 1:30 -1 Add hydrochloric acid into a glass Erlenmeyer flask and stir at 40°C for 4h until P123 is completely dissolved. Add tetraethyl orthosilicate (TEOS) dropwise to the mixed solution, stir at a rate of 300r / min for 60min to prehydrolyze TEOS, then add mercaptopropyltrimethoxysilane (MPTMS) dropwise and increase the stirring rate to 400r / min. The silicon contained in the added TEOS accounts for 5% of the moles of P123, and the mercapto groups contained in the MPTMS account for 30% of the total moles of silicon in the mixed solution. The above mixed solution was continuously stirred at 40° C. for 20 h, then transferred to a high-pressure reactor, and crystallized at 100° C. for 24 h. After the product is co...

Embodiment 3

[0103] In this example, the preparation method of the mercapto-modified SBA-15 mesoporous silicon material is as follows:

[0104] Step 1, polyethylene oxide-polypropylene oxide-polyoxyethylene triblock copolymer (P123) and concentration are 2mol L by mass volume ratio 1:30 -1Add hydrochloric acid into a glass Erlenmeyer flask and stir at 40°C for 4h until P123 is completely dissolved. Add tetraethyl orthosilicate (TEOS) dropwise to the mixed solution, stir at a speed of 400r / min for 60min to prehydrolyze TEOS, then add mercaptopropyltrimethoxysilane (MPTMS) dropwise and increase the stirring rate to 600r / min. The silicon contained in the added TEOS accounts for 5% of the moles of P123, and the mercapto groups contained in the MPTMS account for 30% of the total moles of silicon in the mixed solution. The above mixed solution was continuously stirred at 40° C. for 20 h, then transferred to a high-pressure reactor, and crystallized at 100° C. for 24 h. After the product is co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and a preparation method of the adsorption film, and belongs to the technical field of gradient diffusion films. The adsorption film is a polyacrylamide hydrogel film, a sulfydryl-amino double-modified SBA-15 type mesoporous silicon material is distributed in the polyacrylamide hydrogel film, and the mole number ratio of sulfydryl to amino is (4-6): 1. The adsorption film disclosed by the invention is simple in preparation process and good in distribution uniformity, and has good selectivity and synchronous fixing capability on trivalent arsenic (As III), trivalent antimony (Sb III) and tetravalent selenium (Se IV).

Description

technical field [0001] The invention belongs to the technical field of gradient diffusion films, and more specifically relates to an adsorption film for selectively fixing tetravalent selenium, trivalent arsenic and / or trivalent antimony and a preparation method thereof. Background technique [0002] The form of pollutants is an important factor that determines their mobility, bioavailability, and toxicity. For multivalent pollutants, there are large differences in environmental chemical behavior and toxicity between pollutants in the oxidized or reduced state. For example, selenium Se in the environment is mainly composed of inorganic Se IV and Se VI Exist in form, arsenic As is mainly in the form of inorganic As III and As Ⅴ Exist in form, antimony Sb is mainly in the form of inorganic Sb III and Sb Ⅴ Species exist, and there are significant differences in mobility and toxicity between different valence states, for example: Se IV The toxicity is Se VI 10 times; with...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30C02F1/28C02F101/20C02F101/10
CPCB01J20/28047B01J20/267B01J20/28033B01J20/28083B01J20/18C02F1/281C02F2101/103C02F2101/20C02F2103/007C02F2209/06
Inventor 罗军方文杨伊史欣窈
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com