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

Method for desorbing heavy metal ions on surface of plastic

A technology of heavy metal ions and metal ions, applied in the field of environmental pollution control, can solve problems such as affecting environmental organisms, hindering the regeneration and utilization of microplastics, and affecting human health, and achieves the effects of low acid corrosion, simple operation and good effect.

Pending Publication Date: 2019-06-14
NANYANG NORMAL UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the aging effects of ultraviolet light and weathering will increase the number of voids and oxidized functional groups on the surface of microplastics, microplastics in the natural environment will not only release pollutants, but also produce heavy metal ions such as zinc, copper, and cadmium in the environment. The role of enrichment and migration greatly affects environmental organisms, which in turn affects human health ("Research progress on the adsorption behavior of microplastics and their impact on organisms", Qushasha et al., Journal of Environmental Hygiene, February 2017, No. 7 Vol. 1, pp. 75-78)
Traditional methods for treating heavy metal ions adsorbed on the surface of microplastics include acid immersion method and high-temperature digestion method. The acid immersion method has problems, especially for incomplete metal desorption on the surface of aging microplastics and easy acid corrosion of equipment. The high-temperature digestion method It will directly destroy the microplastic body and hinder the recycling of microplastics

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 desorbing heavy metal ions on surface of plastic
  • Method for desorbing heavy metal ions on surface of plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 desorption experiment:

[0023] (1) The aging plastic comes from the plastic playground of the school that is often exposed to wind and sun. For a more accurate test of the desorption effect of the present invention, the collected plastics were desorbed with 5wt% HNO 3 After ultrasonic cleaning for 30 minutes, vacuum filter and wash with ultrapure water several times to remove various metal elements that may be adsorbed. Vacuum dried and cleaned plastics are visually classified into: granular plastics and fibrous plastics.

[0024] (2) Accurately weigh zinc sulfate, copper sulfate and chromium sulfate, respectively configure the standard solutions of zinc ions, copper ions and cadmium ions (C 0 , mg / L). Accurately weigh the mass as M 0 The granular plastics and cellulose plastics treated in step (1) are added to the above-mentioned zinc ions, copper ions and cadmium ions respectively, and shake overnight at 160r / min and 30°C in the dark to make the zinc...

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
diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for desorbing heavy metal ions on the surface of a plastic. The method comprises the steps that the plastic with the heavy metal ions adsorbed on the surface is soakedin an ethylenediamine tetraacetic acid disodium aqueous solution, and the metal ions are desorbed and transferred from the surface of the plastic to the ethylenediamine tetraacetic acid disodium aqueous solution; and the ethylenediamine tetraacetate acid disodium aqueous solution is separated from the plastic. Compared with an existing acid soaking method and a high temperature digestion method,the method is better in desorption effect and simple in operation, and an economical and feasible method and path are provided for environmental ecological safety evaluation and recycling of microplastics.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and in particular relates to a desorption method for heavy metal ions on the surface of plastics. Background technique [0002] Microplastics, generally referring to plastic particles or fragments with a size smaller than 5 mm, are a new type of pollutant. Since the aging effects of ultraviolet light and weathering will increase the number of voids and oxidized functional groups on the surface of microplastics, microplastics in the natural environment will not only release pollutants, but also produce heavy metal ions such as zinc, copper, and cadmium in the environment. The role of enrichment and migration greatly affects environmental organisms, which in turn affects human health ("Research progress on the adsorption behavior of microplastics and their impact on organisms", Qushasha et al., Journal of Environmental Hygiene, February 2017, No. 7 Vol. 1, pp. 75-78). The traditiona...

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): B29B17/02C22B7/00C22B15/00C22B17/06C22B19/30
CPCY02P10/20Y02W30/62
Inventor 章伟成黄耿宁冰玉姚伦广许鑫
Owner NANYANG 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