Method for analyzing influence of humic acid in water body on lead adsorption process and mechanism

A technology of humic acid and microplastics, applied in the field of environmental analysis, can solve the problems of no adsorption mechanism and lack, and achieve the effect of simple operation steps and great application prospects

Pending Publication Date: 2021-12-21
SUN YAT SEN UNIV
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Problems solved by technology

However, the current research on the adsorption of heavy metal ions by microplastics only briefly analyzes its kinetic adsorption and isothermal adsorption processes, but there is no study on the effect of humic acid (HA) on the adsorption of heavy metal Pb(II) by microplastics, and through this to explo

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  • Method for analyzing influence of humic acid in water body on lead adsorption process and mechanism
  • Method for analyzing influence of humic acid in water body on lead adsorption process and mechanism
  • Method for analyzing influence of humic acid in water body on lead adsorption process and mechanism

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Embodiment 1

[0065] Example 1 A method for analyzing the process and mechanism of humic acid in water affecting the adsorption of lead by microplastics

[0066] 1. Adsorption kinetics test:

[0067] Effects of PSMPs (polystyrene microplastics) on Pb under different HA concentrations in water 2+ The adsorption kinetics test was carried out, and the pseudo-first-order kinetics and pseudo-second-order kinetics models were fitted to the kinetic adsorption data, and the initial adsorption rate was calculated according to the fitting parameters of the pseudo-second-order kinetics model.

[0068] When carrying out the adsorption kinetics test, measure a certain volume of PSMPs (polystyrene microplastics) suspension in a 250mL conical flask, add a certain volume of Pb 2+ solution, HA solution and background electrolyte solution, so that each component reaches the preset concentration value (the concentration of PSMPs is 50.0mg / L; Pb 2+ The initial concentration of HA is 5.00mg / L; the concentrati...

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Abstract

The invention belongs to the technical field of environmental analysis, and particularly relates to a method for analyzing the influence of humic acid in a water body on the lead adsorption process and the mechanism, the influence behaviors of humic acid on Pb < 2 + > adsorption of micro-plastic under different conditions are elaborated through adsorption kinetics and adsorption isothermal research, and the adsorption mechanism of the micro-plastic on Pb < 2 + > is disclosed by combining the energy distribution characteristics of the sites; the influence of humic acid on the combination process of the micro-plastic and Pb < 2 + > is analyzed and discussed through fluorescence quenching of humic acid, and the process and mechanism of humic acid for promoting the micro-plastic to adsorb Pb < 2 + > are disclosed; the method is simple in operation steps, can systematically analyze the Pb < 2 + > adsorption behavior of the micro-plastic from different angles, provides a scientific basis for effective control of the micro-plastic and lead (Pb (II)) in a water body environment, and has a relatively great application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental analysis, and in particular relates to a method for analyzing the process and mechanism of humic acid in water bodies affecting the adsorption of lead by microplastics. Background technique [0002] Microplastics (MPs) refer to plastic particles with a particle size of less than 5mm. Sources of microplastics include primary microplastic particles directly discharged into the environment, and secondary plastic fragments generated by the decomposition of large plastic wastes under physical, chemical and biological effects. Microplastics have the characteristics of small size, large specific surface area, refractory degradation, and easy migration, and are ubiquitous and widely distributed in nature. Adsorption is an important environmental behavior of microplastics. Microplastics have a large specific surface area and are easy to adsorb other environmental pollutants, such as heavy metal ions...

Claims

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Application Information

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IPC IPC(8): G01N30/00G01N21/64
CPCG01N30/00G01N21/6428G01N2021/6434G01N2021/6439
Inventor 曾锋卢晓钿
Owner SUN YAT SEN UNIV
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