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

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...

AI Technical Summary

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 explore the microplastics The study of the adsorption mechanism of Pb(II) also lacks a systematic analysis method to explain its adsorption behavior

In addition, there is no relevant report on the use of site energy distribution theory to analyze the adsorption mechanism of microplastics adsorbing pollutants.

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