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

Porous carbon adsorbent based on polyethylene microplastics and preparation method and application thereof

A technology of microplastics and polyethylene, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of large chromaticity, refractory degradation, biological toxicity, etc., and achieve simple operation and high added value. Effect of conversion, strong removal ability

Pending Publication Date: 2020-05-01
EAST CHINA NORMAL UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large chroma, refractory degradation and serious biological toxicity, the treatment of dye wastewater has become an urgent environmental problem

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
  • Porous carbon adsorbent based on polyethylene microplastics and preparation method and application thereof
  • Porous carbon adsorbent based on polyethylene microplastics and preparation method and application thereof
  • Porous carbon adsorbent based on polyethylene microplastics and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Select PE microplastic powder as the raw material, weigh 3 g and disperse it in a round-bottomed flask filled with 150 mL of concentrated sulfuric acid with a concentration of 98%, heat and reflux with a heating mantle for 8 h, and then naturally cool to room temperature to obtain a black liquid;

[0027] The above black liquid was slowly added dropwise into a solution with a ratio of 40 g NaOH / 200 mL water, and the dropping process was carried out in an ice-water bath to ensure that the temperature of the neutralization reaction system was lower than 40 °C.

[0028] The product obtained after neutralization with alkali was centrifuged in a centrifuge at 5000 r / min for 5 min, the obtained solid was washed with ultrapure water, and centrifuged until all the solids were completely dissolved in water, that is, the centrifugation could not separate the solid from the liquid.

[0029] The product obtained in the previous step was frozen and dried in a freeze dryer to obtain s...

Embodiment 2

[0033] Waste PE mulch was selected as raw material, cut into microplastic fragments of 5 mm × 5 mm, and porous carbon adsorbent was prepared according to the method in Example 1. The operation of the adsorption experiment was the same as in Example 1, and the saturated adsorption capacity of the porous carbon adsorbent to methylene blue could reach 581.1 mg / g.

[0034] The thermodynamic curves of the porous carbon adsorbent prepared in Example 1 and Example 2 of the present invention and commercial activated carbon adsorb methylene blue under the same conditions are as follows image 3 As shown, it can be seen from the figure that the porous carbon adsorbent based on polyethylene microplastics has a much higher removal capacity for methylene blue dye than commercial activated carbon (its maximum adsorption capacity is 408.7 mg / g).

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

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
sizeaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a porous carbon adsorbent based on polyethylene microplastics and a preparation method and application thereof, belonging to the technical fields of treatment and conversion ofwaste plastics and water body treatment. The preparation method comprises the following steps: 1) dispersing polyethylene (PE) microplastics in concentrated sulfuric acid, and carrying out heating reflux, addition of alkali for neutralization, centrifugation and drying treatment successively to obtain sulfonated microplastics; and 2) performing high-temperature pyrolysis and water washing on thesulfonated microplastics to remove inorganic salts so as to obtain the porous carbon adsorbent based on the polyethylene microplastics. The porous carbon adsorbent has a large number of pore structures and a large BET specific surface area, and the maximum specific surface area of the porous carbon adsorbent can reach 1948 cm<2> / g; and the porous carbon adsorbent is used for removing the dye methylene blue in a water body, and has a maximum adsorption capacity of 704.7 mg / g. The invention provides the convenient resourceful treatment method of the PE microplastics, operation process is simple,the solid phase adsorbent after a reaction is easy to separate, and the method has good application prospects in the field of water pollution treatment.

Description

technical field [0001] The invention belongs to the technical field of waste plastic treatment, recycling and environmental water treatment, and specifically relates to a porous carbon adsorbent based on polyethylene microplastics, a preparation method and application. Background technique [0002] Plastic products are widely used all over the world due to the advantages of multi-function, light weight and portability, corrosion resistance and low cost. According to statistics, in 2018 alone, the global plastic production volume reached 348 million tons, of which the production volume of PE reached nearly 100 million tons. Less than 10% of the waste plastics produced after use of these plastic products were recycled, and most of them were recycled. Plastic waste is discarded in the environment, causing very serious environmental problems. In recent years, the problem of microplastic pollution has attracted widespread attention around the world. Microplastics mainly refer t...

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): B01J20/20B01J20/30C02F1/28C02F101/38
CPCB01J20/20C02F1/283C02F2101/308C02F2101/38
Inventor 赵雅萍刘学敏施华宏马晟佳景佳娜李宗宸
Owner EAST CHINA NORMAL 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