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

Method for removing pollutants through efficient reduction of ball-milled lignosulphonated zero-valent iron

A technology of sodium lignosulfonate and lignosulfonate, which is applied in the field of environmental chemistry, can solve the problems of reducing the reduction activity of target pollutants and hindering the outward transfer of zero-valent iron electrons, etc., so as to facilitate large-scale promotion, easy construction and operation, Practical effect

Active Publication Date: 2022-04-29
ZHEJIANG UNIV OF TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are also many defects in the practical application of zero-valent iron. The dense iron oxide layer on the surface of zero-valent iron will greatly hinder the outward transfer of electrons inside zero-valent iron, resulting in a reduction in the reduction activity of target pollutants.

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
  • Method for removing pollutants through efficient reduction of ball-milled lignosulphonated zero-valent iron
  • Method for removing pollutants through efficient reduction of ball-milled lignosulphonated zero-valent iron
  • Method for removing pollutants through efficient reduction of ball-milled lignosulphonated zero-valent iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Comparison effect diagram of azo dye Golden Orange Ⅱ in degraded water with lignosulfonated zero-valent iron prepared by ball milling and modified composite materials with different mass ratios.

[0038] Weigh 2.5g of zero-valent iron powder and a certain amount of sodium lignosulfonate and place it in a ball mill tank, and fill the tank with argon; turn on the ball mill to obtain ball-milled lignosulfonated zero-valent iron [LS–mZVI(x%) ] (x% is the mass ratio of sodium lignosulfonate to zero-valent iron) or ball-milled zero-valent iron (mZVI). Add 200mL of Golden Orange II solution with a concentration of 20ppm in a 250mL beaker, the pH of the solution is 6.15, add 0.2g of different materials (LS–mZVI, mZVI, LS, 190mg mZVI+10mg LS) for comparison, and use mechanical stirring in an open aerobic environment Mixing, the rotating speed is set to 400r / min. Samples were taken at regular intervals to determine the residual amount of Golden Orange II in the system. Experime...

Embodiment 2

[0042] Effect diagram of preparing lignin sulfonated zero-valent iron by ball milling and degrading azo dye methyl orange in water.

[0043] Weigh 2.5g of zero-valent iron powder and 0.05g of sodium lignosulfonate into a ball milling tank, and fill the tank with argon; turn on the ball mill to obtain ball-milled lignosulfonated zero-valent iron LS-mZVI (2%). Add 200mL of methyl orange solution with a concentration of 20ppm in a 250mL beaker, the pH of the solution is 6.01, add ball-milled lignosulfonated zero-valent iron LS-mZVI (2%) or ball-milled zero-valent iron (mZVI) 0.2g, in the open The oxygen environment was mixed by mechanical stirring, and the speed was set at 400r / min. Samples were taken at regular intervals to determine the residual amount of methyl orange in the system. Experimental results such as Figure 5 As shown, the removal rate of zero-valent iron by ball-milling lignin sulfonation can reach 80% in 120 minutes, while the removal of unmodified zero-valent ...

Embodiment 3

[0045] Effect diagram of preparing lignosulfonated zero-valent iron by ball milling and removing nitrobenzene from water.

[0046] Weigh 2.5g of zero-valent iron powder and 0.125g of sodium lignosulfonate into a ball milling tank, and fill the tank with argon; turn on the ball mill to obtain ball-milled lignosulfonated zero-valent iron LS-mZVI (5%). Under aerobic conditions, 60 mL of 10 ppm nitrobenzene aqueous solution was added to a 64 mL serum bottle, and 0.12 g of ball-milled lignosulfonated zero-valent iron LS-mZVI (5%) or ball-milled zero-valent iron (mZVI) was added. Then place it on a constant temperature rotary mixer for reaction, the reaction conditions are 60r / min, 25°C. Samples were taken at regular intervals to determine the residual amount of nitrobenzene in the system. The result is as Image 6 It is shown that the removal rate of p-nitrobenzene in the ball-milled lignin sulfonated modified zero-valent iron composite material can reach 100% within 30 minutes. ...

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 pollutants through efficient reduction of ball-milled lignosulphonated zero-valent iron. Adding the ball-milled lignosulphonated zero-valent iron into a pollutant solution for reducing and removing pollutants; the ball-milled lignosulphonated zero-valent iron is prepared by a high-energy ball milling method, and lignosulfonate is doped on the surfaces of particles so as to improve the activity of the ball-milled zero-valent iron. The obtained ball-milled lignosulphonated zero-valent iron can be used for efficiently reducing and removing different heavy metals, azo dyes and nitro-containing organic pollutants in a water body, and has better universality compared with a pure ball-milled zero-valent iron material.

Description

technical field [0001] The invention relates to the technical field of environmental chemistry, in particular to a method for efficient reduction and removal of pollutants by ball-milling lignin sulfonated zero-valent iron. Background technique [0002] Water pollution will cause global environmental and social problems, among which the discharge of wastewater containing heavy metals and organic pollutants seriously restricts the use of water resources and the safety of the water environment, seriously endangering the ecological environment and human health. In the past thirty years, zero-valent iron (ZVI) has been widely used in the reduction and removal of various inorganic and organic pollutants due to its strong reducing performance, low price and environmental friendliness, especially its ability to The immobilization and reduction of heavy metals, the reduction and decolorization of azo dyes and the reduction and transformation of p-nitroaromatic compounds have attract...

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): C02F1/70C02F101/20C02F101/22C02F101/30C02F101/34C02F101/38
CPCC02F1/705C02F2101/20C02F2101/308C02F2101/38C02F2101/34C02F2101/22
Inventor 何锋刘玉王书晨何凯
Owner ZHEJIANG UNIV OF 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