Microplastic discharge amount calculation and pollution degree evaluation method for urban drainage system

Abstract

The invention discloses a method for calculating the micro-plastic discharge amount and evaluating the pollution degree of an urban drainage system, and the method comprises the steps: carrying out the collection and detection of micro-plastic samples in all links of the urban drainage system, and accounting the micro-plastic discharge amount of a drainage system in a to-be-researched region in a dry season and a rainy season; and evaluating the pollution degree of the micro-plastic discharge condition by adopting a pollution load index method. The method is combined with the actual conditions of most urban drainage systems at present, can be suitable for different drainage systems, has the advantages of being high in applicability, easy to operate and the like, is suitable for popularization and use and has guiding significance on microplastic emission source analysis and total amount control of an urban land area system, and calculation and evaluation results are completely based on actual monitoring data.

Description

technical field [0001] The invention belongs to the technical field of urban water environment pollution control, and in particular relates to a method for calculating the discharge amount of microplastics in an urban drainage system and evaluating the degree of pollution. Background technique [0002] Microplastics usually refer to plastics with a particle size of less than 5mm. Extensive use of plastic products, inappropriate plastic waste management, and misbehavior by people are the main causes of microplastics in the environment. For example, the widespread use of personal care products containing plastic microbeads, the massive shedding of synthetic fibers during laundry washing, the production and accidental spills of industrial products, landfill leachate, etc. These production and use processes lead to a large accumulation of plastics in the environment, and continue to be broken down into smaller plastic fragments under physicochemical or biological action. Micro...

AI Technical Summary

Problems solved by technology

Some studies focus on the quantitative accounting and evaluation of microplastic discharge levels in drainage systems, but they are all limited to the research on the pollution status of microplastics in sewage treatment plant tail water and untreated sewage, without considering different land use types and different drainage systems, etc. In addition, the rainy day overflow pollution discharge is not included in the accounting of the total pollution, so it is difficult to reflect the real discharge level, and it is impossible to carry out effective evaluation and comparison of pollution status

Images