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Updated: Apr 4, 2026

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Published on: July 1, 2017

Interfacial interactions between plastic particles in plastics flotation.

Chong-qing Wang¹, Hui Wang¹, Guo-hua Gu²

¹School of Chemistry and Chemical Engineering, Key Laboratory of Resource Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha, Hunan 410083, China.

Waste Management (New York, N.Y.)

|September 5, 2015

Summary

This summary is machine-generated.

This study reveals hydrophobic attraction dominates plastic particle interactions during flotation. Wetting agents disperse plastics, reducing floatability, but pneumatic flotation may enhance recovery.

Keywords:

Hydrophobic attraction Interfacial interactions Plastics flotation Surface energy

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Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

Published on: July 28, 2018

Area of Science:

Materials Science
Chemical Engineering
Environmental Science

Background:

Plastic waste recycling is crucial, with flotation emerging as a key industrial technology.
Understanding interfacial interactions is vital for optimizing plastic flotation efficiency.

Purpose of the Study:

To investigate the interfacial interactions governing plastic particle behavior in flotation systems.
To elucidate the role of van der Waals forces and Lewis acid-base interactions.
To analyze the impact of wetting agents on plastic particle dispersion and floatability.

Main Methods:

Calculated Lifshitz-van der Waals (LW) and Lewis acid-base (AB) Gibbs functions.
Utilized extended Derjaguin-Landau-Verwey-Overbeek (DLVO) potential energy profiles.
Examined the relationship between hydrophobic attraction and surface properties.

Main Results:

Van der Waals forces contribute to attraction between plastic particles.
Hydrophobic attraction, driven by AB Gibbs function, is the dominant interparticle force.
Wetting agent adsorption enhances particle dispersion and reduces floatability.
A three-order polynomial relationship was found between AB Gibbs function and Lewis base component.

Conclusions:

Hydrophobic attraction is the primary mechanism in plastic flotation.
Wetting agents negatively impact floatability by promoting dispersion.
Pneumatic flotation offers potential for improved plastic recovery and purity via selective wetting agent adsorption.