Method for removing micro-plastics in water body by electrolytic air floatation

A technology of electrolytic air flotation and microplastics, applied in chemical instruments and methods, flotation water/sewage treatment, water pollutants, etc., can solve the problems of large biological toxicity effects, pollutant enrichment, etc.

Active Publication Date: 2019-07-16
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, microplastics are easily absorbed into the body by organisms, which further leads to the accumulation of pollutants in the organs of organisms, resulting in greater biotoxic effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] Preparation of the complex: Add dodecylamine and copper nitrate into the reaction vessel at a molar ratio of 9.5:1, stir and react fully at 110°C, discharge the material,

[0013] The above-mentioned materials were fully dispersed in ethanol at a mass ratio of 1:20 to obtain an ethanol dispersion of the complex.

Embodiment 1

[0015] A plurality of circular microplastic flakes with a diameter of 2 mm were weighed and fully dispersed in pure water to obtain a simulated dispersion liquid with microplastic pollution in stable suspension. The concentration of microplastic flakes in the simulated dispersion liquid was 1 g / L (176 / L), add the ethanol dispersion of the complex obtained above into the simulated dispersion and stir fully to a suspended state, the mass volume ratio of the ethanol dispersion of the complex to the simulated dispersion is 100g: 1L,

[0016] Quickly insert the corresponding anode and cathode vertically into the above-mentioned suspended mixed water body to a position close to the bottom of the water for electrolysis treatment. Both the anode and cathode use graphite electrode plates with a thickness of 4mm, and the distance between the plates is 30mm. Apply a DC voltage of 380V with a current density of 100A / m 2 , The electrolysis time is 20min. After electrolysis, quickly remov...

Embodiment 2

[0026] Take the 100-fold concentrated surface water body (sampling the 100-fold concentrated surface water body in a suspended state and weighing it after drying, the mass concentration of microplastics in the concentrated surface water body can be obtained as 0.56g / L), and report to Add the above-mentioned ethanol dispersion of the complex to the concentrated surface water and stir until fully suspended. The mass-to-volume ratio of the ethanol dispersion of the complex to the concentrated surface water is 56g: 1L,

[0027] Quickly insert the corresponding anode and cathode vertically into the above-mentioned suspended mixed water body to a position close to the bottom of the water for electrolysis treatment. Both the anode and cathode use graphite electrode plates with a thickness of 4mm, and the distance between the plates is 30mm. Apply a DC voltage of 380V with a current density of 100A / m 2 , The electrolysis time is 20min. After electrolysis, quickly remove the liquid la...

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Abstract

The invention belongs to the technical field of solid waste treatment, and particularly relates to a method for removing micro-plastics in a water body by electrolytic air floatation. The method comprises the following steps: firstly, adding a complex of long-chain alkylamine and copper ions into a water body in which micro-plastics are dispersed, and conducting full mixing, wherein the complex oflong-chain alkylamine and copper ions is obtained by mixing a copper salt and long-chain alkylamine and conducting heating reaction; secondly, performing electrolysis treatment on the obtained mixedwater body, so as to lead to the phenomenon that air bubbles are generated in the mixed water body during electrolysis, and drive the micro-plastics in the water body to float upwards while rising; and finally, collecting and removing the micro-plastics concentrated on the upper layer of the water body together, so as to achieve separation of the micro-plastics from the water body.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a method for removing microplastics in water by electrolytic air flotation. Background technique [0002] Microplastics exist widely in the environment, such as distributed in water bodies and soils, and are easy to adsorb other pollutants in water bodies or soils, including organic pollutants and heavy metal pollutants, so that pollutants are enriched on the surface of microplastics. Plastics migrate. In addition, microplastics are easily absorbed into the body by organisms, which further leads to the accumulation of pollutants in the organs of organisms, resulting in greater biotoxic effects. Due to the small particle size of microplastics, it is difficult to separate them from the environment. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for electrolytic air flotation to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/465C02F101/30C02F101/34
CPCC02F1/465C02F2101/34C02F2101/40
Inventor 王琼杰张勇汪金晓雪王育来孟冠华陈宜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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