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

Preparation method and application of anionic-based metal capture agent

An anion, base metal technology, applied in chemical instruments and methods, water pollutants, flocculation/sedimentation water/sewage treatment, etc., can solve the problem that flocculants cannot achieve good removal effect.

Inactive Publication Date: 2019-04-16
SHENZHEN YUEPENG ENVIRONMENTAL PROTECTION TECH
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coordination ions in heavy metal wastewater make heavy metal ions usually exist in the water body in a stable dissolved state, and conventional flocculants cannot achieve a good removal effect.

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
  • Preparation method and application of anionic-based metal capture agent
  • Preparation method and application of anionic-based metal capture agent
  • Preparation method and application of anionic-based metal capture agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of preparation method of anion-based metal scavenger, comprises the steps:

[0028] S1: Prepare an anionic solution with a concentration of 1g / L, put anionic polyacrylamide into deionized water and stir well until the anionic polyacrylamide is completely dissolved;

[0029] S2: Take the anionic polyacrylamide solution from step S1, and add 3mol / L sodium hydroxide solution and carbon disulfide solution to obtain a mixed solution at the same time, the volume ratio of the anionic polyacrylamide solution: sodium hydroxide solution: carbon disulfide solution is 1:0.7-1.2:0.1-0.3; specifically, the volume ratio of anionic polyacrylamide solution: sodium hydroxide solution: carbon disulfide solution can be 1:0.7:0.1, 1:0.9:0.15, 1:1:0.2 or 1:1.2:0.3; Among them, the carbon disulfide solution is commercially available, and its concentration is a conventional concentration;

[0030] S3: Add deionized water to the mixed solution in step S2 to make up the vol...

Embodiment 2

[0037] Embodiment 2: the application of a kind of anion-based metal scavenger, the anion-based metal scavenger prepared in embodiment 1 is used to reduce the heavy metal in heavy metal ion wastewater, wherein the addition amount of anion-based metal scavenger and metal ion wastewater The volume ratio is 0.4-1.4:200, the initial heavy metal concentration is 5 mg / l; the pH value of the heavy metal ion wastewater is 6-9.

[0038] When the anion-based metal scavenger directly acts on the heavy metal ion wastewater, it cannot directly produce flocculation, but reduces the metal ions, which essentially removes the heavy metal ions in the wastewater.

[0039] The effect of the dosage of anion-based metal scavenger on the performance of removing metal chromium, see figure 2 :

[0040] pass figure 2 It can be seen that under the same pH value of heavy metal ion wastewater, when the dosage of anion-based metal scavenger increases, the removal rate of metal chromium in heavy metal io...

Embodiment 3

[0043] Embodiment 3: the application of a kind of anion-based metal scavenger, the anion-based metal scavenger prepared in embodiment 1 is first added in the heavy metal ion wastewater, carries out reduction reaction, when the pH value of heavy metal ion wastewater is at 6-7 In between, usually add inorganic coagulant after 45min-60min; the inorganic coagulant can be polyaluminum chloride, aluminum sulfate, alum, ferrous sulfate, ferric chloride or polyferric sulfate one or more.

[0044] The initial concentration of the heavy metal is 5mg / l, and the volume of the heavy metal ion wastewater is 200ml. The ratio of the volume of anion-based metal scavenger, the dosage of inorganic coagulant and the concentration of heavy metal ions is 0.4 ml: 28 mg / l: 1 mg / l.

[0045] The influence of different pH values ​​on the removal rate is shown in Table 4:

[0046] pH

[0047] It can be seen from Table 4 that white flocs are produced only when the pH value is between 6-7, and ...

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 relates to a preparation method and application of an anionic-based metal capture agent. The method includes the steps that S1, an anionic solution with the concentration of 1 g / L is prepared; S2, an anionic polyacrylamide solution is obtained from S1, a 3 mol / L sodium hydroxide solution and a carbon disulfide solution are added into the anionic polyacrylamide solution at the same time to obtain a mixed solution, wherein the volume ratio of the anionic polyacrylamide solution to the sodium hydroxide solution to the carbon disulfide solution is 1:(0.7-1.2):(0.1-0.3); S3, deionizedwater is added into the mixed solution obtained in S2 for volume determination, wherein the volume ratio of the mixed solution to the deionized water is 1:(0.6-1.23); then the mixture is stirred for12-48 h at room temperature, and the anionic-based metal capture agent is obtained. The anionic-based metal capture agent can be independently applied to removal of heavy metal ions in heavy metal ionwastewater, can also be combined with an inorganic flocculant to remove the heavy metal ions in the heavy metal ion wastewater, and is obvious in removal effect.

Description

technical field [0001] The invention relates to the field of flocculant preparation, in particular to a preparation method and application of an anion-based metal scavenger. Background technique [0002] The new heavy metal capture method developed vigorously in recent years uses the principle that the molecular structure of the agent can chelate with heavy metal ions to form a chelated precipitate. The agent used is called a heavy metal chelating agent or a heavy metal trapping agent. This method has several characteristics: the treatment method is simple, only need to add chemicals to remove heavy metal ions, and does not increase the cost of equipment. The flocculants used in flocculation and sedimentation in conventional water treatment processes do not have the ability to remove water-soluble substances, but can remove certain sols or suspended particles formed by insoluble substances. However, the coordination ions in heavy metal wastewater make heavy metal ions usual...

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): C02F1/56C02F101/22
CPCC02F1/56C02F2101/22
Inventor 朱国成王闯卞永宁解付兵朱川曲任伯职欧阳书径
Owner SHENZHEN YUEPENG ENVIRONMENTAL PROTECTION 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