The identification research of emergency treatment technology for sudden heavy metal pollution accidents in drainage basin based on D-S evidence theory

Abstract

As a sudden heavy metal pollution accident occurs in a drainage basin, decision makers need to quickly select the optimal emergency treatment technology and formulate emergency schemes according to the actual accident characteristics. Therefore, a two-step identification method of emergency treatment technology for sudden heavy metal pollution accidents based on Dempster-Shafer (D-S) evidence theory is proposed, in order to screen the optimal emergency treatment technology effectively and solve the conflict among fusion data in the process of index quantification. Firstly, the available technologies were screened preliminarily by the primary identification indexes (technical characteristic indexes). Secondly, the weight synthesis method based on the D-S evidence theory and attribute assignment was utilized to score the secondary identification indexes (technical evaluation indexes) of each available technology comprehensively. Finally, the optimal emergency treatment technology for this sudden pollution accident was obtained. Taking the sudden arsenic pollution accident of the Picang flood diversion channel in Linyi, Shandong Province as an example, the activated alumina adsorption dam technology was extracted successfully, which is in accordance with the actual treatment situation. The result shows that the method has strong feasibility and practicability, which can provide strong decision support for dealing with sudden pollution accidents in drainage basins efficiently.

Research on emergency treatment technology for water pollution accidents where the pollutants are not included in the emergency database

“…Meanwhile, to reduce the difficulty of waste disposal and since the difficulty of processing bagged adsorbed waste is more minor than sediment dredging, the packaged adsorbent in woven bags is a better choice. Compared with the previous studies of the research group (Luo et al 2019;Luo et al 2020b;Du et al 2021), the system proposed in this study solves the situation of powerlessness in the previous study when an accident occurs but the chemical is not in the database. It provides new ideas for the emergency treatment of chemicals that have never occurred in sudden pollution accidents.…”

“…Based on the team's previous study of establishing the emergency treatment database (Luo et al 2019(Luo et al , 2020bDu et al 2021), this study expanded the database into 96 chemicals, according to "Environmental Emergency Response and Practical Handbook" written by the SEPA, List of China Priority Control Pollutants in Water Environment and Priority List of Potentially Toxic Chemicals in China proposed by the CRAES. This study also added indexes to the database from the physicochemical properties of chemicals, including molecular weight, melting point, boiling point, density, flash point, and vapor pressure data (CAS 1978(CAS -2020.…”

“…With the emergence of new technology, the emergency technologies used in historical cases may not be optimal. Given the limitations of the case database above, Luo et al (2019); Luo et al (2020b); Du et al (2021) set up an emergency treatment technology database of heavy metals and organic chemicals by combining historical cases with examples of water pollution control engineering and new technology. Five indexes (Water Discharge, pH Range, Temperature, Range of Treatable Concentrations, and Reliance on Engineering) that can be objectively measured and quantified by monitoring and investigating the accident scene are established as primary identification indexes to preliminarily select alternative technologies.…”

“…Then, comprehensive evaluation and screening of alternative technologies are conducted according to the technical evaluation index. The above studies are only applicable to accidents when pollutant chemicals are included in the database; however, they can do nothing when it is not included (Luo et al 2019(Luo et al , 2020bDu et al 2021).…”

Comprehensive evaluation of water resources security of the Huaihe Eco-economic Belt

“…Moreover, the creation of spindle shaped PbWO4 nanostructures and the introduction of visible light can also be used as an effective material to eliminate water pollution (Zinatloo et al 2021a(Zinatloo et al , 2021b. Luo et al (2019) successfully extracted activated alumina adsorption dam technology to solve the problem of sudden heavy metal pollution in the river basin and it can provide support for the efficient treatment of sudden pollution accidents in the river basin.…”