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

The method of removing heavy metal absorbent lac/paa combined with traditional water treatment process to remove low concentration pb(ii)

An absorbent, heavy metal technology, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of limited application and development, high treatment cost, low cost, high efficiency, The effect of saving resources

Active Publication Date: 2021-05-04
TIANJIN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for other methods, due to the high processing cost, there are many problems to be solved in practical application, which limits their application and development [22,23]

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
  • The method of removing heavy metal absorbent lac/paa combined with traditional water treatment process to remove low concentration pb(ii)
  • The method of removing heavy metal absorbent lac/paa combined with traditional water treatment process to remove low concentration pb(ii)
  • The method of removing heavy metal absorbent lac/paa combined with traditional water treatment process to remove low concentration pb(ii)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Using XJ river water as raw water to configure contaminated water containing Pb(II), pH=7.6, Pb(II) concentration of 51 μg / L, after adding 25 mg / L LAC / PAA for adsorption for 20 minutes, the effluent Pb (II) The concentration is 8.6μg / L, which meets the requirements of the WHO water quality standard.

Embodiment 2

[0059] Example 2: A water sample contaminated with Pb(II), pH=8.5, Pb(II) concentration was 46 μg / L, after adding 22 mg / L LAC / PAA for adsorption for 20 minutes, the effluent Pb(II) concentration was 7.6μg / L, which meets the requirements of WHO water quality standards.

Embodiment 3

[0060] Example 3: A water sample contaminated with Pb(II), pH=4.6, Pb(II) concentration was 35 μg / L, the pH was adjusted to 8.0, and 20 mg / L of LAC / PAA was added for adsorption for 20 minutes. The concentration of Pb(II) was 7.6μg / L, which met the requirements of the WHO water quality standard.

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 removing low-concentration Pb(II) in combination with a heavy metal removing absorbent LAC / PAA and a traditional water treatment process. A low-cost heavy metal-removing absorbent (LAC / PAA) was prepared. Compared with activated carbon used in ordinary water purification plants (pH=6-10), the acidic groups on the surface of LAC / PAA increased (pH=4.8), thus obtaining adsorption The function of removing heavy metals. For the raw water polluted by Pb(II), the raw water quality should be analyzed first. If Pb(II)≤50μg / L, it can be directly absorbed by LAC / PAA, which can meet the requirements of WHO water quality guidelines. If 50μg / L

Description

technical field [0001] The invention relates to the technical field of removing heavy metals in water, in particular to a method for removing low-concentration Pb(II) by combining a low-cost heavy metal removing absorbent LAC / PAA with a traditional water treatment process. Background technique [0002] However, the emergency treatment of heavy metal lead (Pb(II)) contamination in drinking water is rarely reported [18] . Although chemical precipitation technology is defined as the method of emergency removal of heavy metals from water [16] However, according to the World Health Organization's drinking water quality guidelines, the allowable limit of Pb(II) in drinking water is 10 μg / L (WHO, 2011), which cannot be achieved by a single chemical precipitation technology. Therefore, there is an urgent need to develop a cost-effective emergency water treatment technology for the removal of trace Pb(II) contamination, which is not only efficient, easy to operate, but also easy to...

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): C02F1/28C02F9/04C02F101/20
CPCC02F1/283C02F1/285C02F1/5245C02F1/66C02F9/00C02F2101/20
Inventor 董丽华潘淑杰刘婧顾平张光辉
Owner TIANJIN 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