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

A kind of method and application of preparing heavy metal chromium adsorbent

An adsorbent, heavy metal technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, special compound water treatment, etc., to achieve the effects of increasing adsorption capacity, high yield of finished products, and simple operating conditions

Active Publication Date: 2017-02-15
KUNMING UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of heavy metal chromium adsorbent by modifying phosphogypsum with hexadecyltrimethylammonium bromide (HDTMA) at home and abroad.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Wash the phosphogypsum with deionized water for 3 times until neutral, filter it under reduced pressure, dry it at 60°C for 24 hours, grind the phosphogypsum sample to 160 mesh to obtain the pretreated phosphogypsum;

[0020] (2) Dissolve 5g of hexadecyltrimethylammonium bromide (HDTMA) in 20g of deionized water and stir at 25°C for 0.3h to obtain an organic modification solution;

[0021] (3) Add 5 g of pretreated phosphogypsum to the organic modification solution per 1 ml of the organic modification solution obtained in step (2), add the pretreated phosphogypsum to the organic modification solution, and stir at 25°C for 2 hours, Suction filtration under reduced pressure, washing with distilled water twice until neutral to obtain a filter cake, drying at 60°C for 12 hours, grinding and passing through a 160-mesh sieve to obtain HDTMA modified adsorbent.

[0022] (4) Mix and stir the adsorbent at a dosage of 5g / L, wastewater concentration of 30mg / L, room temperature...

Embodiment 2

[0024] (1) Wash the phosphogypsum with deionized water for 3 times until it becomes neutral, filter it under reduced pressure, dry it at 80°C for 18 hours, and grind the phosphogypsum sample to 180 mesh to obtain the pretreated phosphogypsum;

[0025] (2) Dissolve 5g of hexadecyltrimethylammonium bromide (HDTMA) in 25g of deionized water and stir at 28°C for 1 hour to obtain an organic modification solution;

[0026] (3) Add 8 g of pretreated phosphogypsum to the organic modification solution per 1 ml of the organic modification solution obtained in step (2), add the pretreated phosphogypsum to the organic modification solution, and stir at 28 ° C for 0.5 h , suction filtration under reduced pressure, washed twice with distilled water until neutral to obtain a filter cake, dried at 75°C for 18 hours, ground and passed through a 180-mesh sieve to obtain HDTMA modified adsorbent.

[0027] (4) Mix and stir the adsorbent at a dosage of 8g / L, wastewater concentration of 40mg / L, roo...

Embodiment 3

[0029] (1) Wash the phosphogypsum with deionized water for 3 times until it becomes neutral, filter it under reduced pressure, dry it at 90°C for 12 hours, and grind the phosphogypsum sample to 200 mesh to obtain the pretreated phosphogypsum;

[0030] (2) Dissolve 5g of hexadecyltrimethylammonium bromide (HDTMA) in 30g of deionized water and stir at 30°C for 0.3h to obtain an organic modification solution;

[0031] (3) Add 10 g of pretreated phosphogypsum to the organic modification solution per 1 ml of the organic modification solution obtained in step (2), add the pretreated phosphogypsum to the organic modification solution, and stir at 30°C for 1 hour, Suction filtration under reduced pressure, washing with distilled water twice until neutral to obtain a filter cake, drying at 90°C for 24 hours, grinding and passing through a 200-mesh sieve to obtain HDTMA modified adsorbent.

[0032] (4) Mix and stir the adsorbent at a dosage of 10g / L, wastewater concentration of 50mg / L, ...

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 method for preparing a heavy metal chromium adsorbent and an application thereof, and belongs to the technical field of heavy metal preparation adsorbent. A heavy metal chromium adsorbent is prepared from hexadecyl trimethyl ammonium bromide (HDTMA) modified ardealite. The method specifically comprises the following steps: carrying out pre-treatment on ardealite, and removing impurities in the ardealite; washing with deionized water, drying and grinding to obtain a sample; adding hexadecyl trimethyl ammonium bromide (HDTMA) to deionized water, so as to obtain modified liquid; adding the modified liquid to the ardealite powder; and stirring and drying to obtain an adsorbent product. According to the method disclosed by the invention, the surface electrical properties of the ardealite can be changed; the adsorption capacity to heavy metal chromium is increased; high-specificity adsorption of chromium ions in a heavy metal ion compound solution is achieved; the operation condition is simple; and the yield of the adsorbent product is extremely high.

Description

technical field [0001] The invention relates to a method and application for preparing a heavy metal chromium adsorbent, and belongs to the technical field of preparing heavy metal adsorbents. Background technique [0002] Phosphogypsum is a by-product in the process of phosphate fertilizer production. The stock of phosphogypsum in my country has exceeded 250 million tons, and is growing at a rate of 60 million tons per year. The main direction of its resource utilization is the manufacture of building materials, but the utilization rate is less than 20%, the stockpiled phosphogypsum not only takes up a lot of land, but also causes environmental pollution. In addition, it also brings a relatively heavy economic burden to the emission enterprises. [0003] Phosphogypsum can be used to treat heavy metal wastewater in utilization. It is a method of treating waste with waste. However, the treatment of heavy metal wastewater by unmodified phosphogypsum mainly relies on adsorption...

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 Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
CPCB01J20/26B01J20/3085C02F1/288C02F1/62C02F2101/22C02F2305/00
Inventor 宁平杨月红石磊程杨张怀予于珊珊
Owner KUNMING UNIV OF SCI & TECH
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