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

Microsphere adsorbent for highly selective adsorption of Cr(VI) and preparation method and application thereof

A highly selective, microsphere adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of non-selective and poor adsorbents, and improve imprinting efficiency and adsorption. speed, high adsorption capacity, and the effect of avoiding difficult elution of template ions

Pending Publication Date: 2019-08-13
ZHEJIANG SCI-TECH UNIV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a variety of adsorbents have been reported for the removal of Cr(VI), although studies have shown that these adsorbents can remove Cr(VI), but these adsorbents have no selectivity or poor selectivity

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
  • Microsphere adsorbent for highly selective adsorption of Cr(VI) and preparation method and application thereof
  • Microsphere adsorbent for highly selective adsorption of Cr(VI) and preparation method and application thereof
  • Microsphere adsorbent for highly selective adsorption of Cr(VI) and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Dissolve 2g of sodium alginate powder in 100mL of deionized water to prepare a 2wt% sodium alginate solution, and then add it dropwise to 100mL of 1wt% CaCl 2 In the solution, stir while adding, drop completely within 2 hours, and the magnetic stirring speed is 300rpm; cross-link at room temperature for 7 hours, filter, and wash repeatedly with deionized water to obtain gelatinous sodium alginate microspheres;

[0057] (2) Then drop the above-mentioned gelatinous sodium alginate microspheres into 50mL of thiosemicarbazide aqueous solution containing glutaraldehyde, wherein the mol ratio of sodium alginate repeating structural unit, glutaraldehyde, and thiosemicarbazide is 1: 1:1, add hydrochloric acid to adjust the pH of the solution to 4-5, keep the temperature at 65°C, and react with magnetic stirring for 6 hours at a magnetic stirring speed of 600rpm; filter and wash repeatedly with deionized water to obtain thiosemicarbazide-modified sodium alginate microspheres;...

Embodiment 2

[0066] (1) Dissolve 2g of sodium alginate powder in 100mL of deionized water to prepare a 2wt% sodium alginate solution, and then add it dropwise to 100mL of 1wt% CaCl 2 In the solution, stir while adding, drop completely within 1 hour, the magnetic stirring speed is 500rpm; cross-link at room temperature for 6 hours, filter, and wash repeatedly with deionized water to obtain gelatinous sodium alginate microspheres;

[0067] (2) Then the above-mentioned gelatinous sodium alginate microspheres are dropped into 60mL of thiosemicarbazide aqueous solution containing glutaraldehyde, wherein the mol ratio of sodium alginate repeating structural unit, glutaraldehyde, and thiosemicarbazide is 2: 1:1, add hydrochloric acid to adjust the pH of the solution to 4-5, keep the temperature at 60°C, and react with magnetic stirring for 5 hours at a magnetic stirring speed of 500rpm; filter and wash repeatedly with deionized water to obtain thiosemicarbazide-modified sodium alginate microsphere...

Embodiment 3

[0076] (1) Dissolve 2g of sodium alginate powder in 100mL of deionized water to prepare a 2wt% sodium alginate solution, and then add it dropwise to 100mL of 1wt% CaCl 2 In the solution, stir while adding, drop completely within 2 hours, the magnetic stirring speed is 400rpm; cross-link at room temperature for 6 hours, filter, and wash repeatedly with deionized water to obtain gelatinous sodium alginate microspheres;

[0077] (2) Then drop the above-mentioned gelatinous sodium alginate microspheres into 70mL of thiosemicarbazide aqueous solution containing glutaraldehyde, wherein the mol ratio of sodium alginate repeating structural unit, glutaraldehyde, and thiosemicarbazide is 1: 1:1, add hydrochloric acid to adjust the pH of the solution to 4-5, keep the temperature at 65°C, and react with magnetic stirring for 6 hours at a magnetic stirring speed of 600rpm; filter and wash repeatedly with deionized water to obtain thiosemicarbazide-modified sodium alginate microspheres;

...

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

No PUM Login to View More

Abstract

The invention discloses a microsphere adsorbent for highly selective adsorption of Cr(VI). The microsphere adsorbent comprises sodium alginate microspheres and a Cr(VI) ion-imprinted adsorption layercoating the surfaces of the sodium alginate microspheres by grafting; the Cr(VI) ion-imprinted adsorption layer is formed through an ion surface imprinting method with thiosemicarbazide as a functional monomer. The invention further discloses a preparation method and application of the microsphere adsorbent for highly selective adsorption of Cr(VI). With thiosemicarbazide as the functional monomer, the microsphere adsorbent has the advantages of large specific surface area, high adsorption capacity and highly selective adsorption of Cr(VI) ions.

Description

technical field [0001] The invention relates to the technical field of heavy metal ion adsorption materials and water treatment, in particular to a microsphere adsorbent for highly selective adsorption of Cr(VI) and its preparation method and application. Background technique [0002] Chromium and its derivatives are widely used in electroplating, textile, printing and dyeing, leather and other industries, and the wastewater discharged from these industries is rich in hexavalent chromium. Due to its toxicity and carcinogenicity, hexavalent chromium can cause serious harm to human health. Therefore, the removal of hexavalent chromium from wastewater is crucial to human health and has become an active research area at present. [0003] Conventional methods for treating chromium in water include chemical precipitation, membrane separation, ion exchange, and electrochemical methods. These methods are costly and ineffective at removing low concentrations of chromium. In additi...

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
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/24B01J20/28016C02F1/286C02F1/288C02F2101/22
Inventor 王莉莉吴明华李恒王炜王懿佳倪华刚余德游
Owner ZHEJIANG SCI-TECH 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