Spatial dynamics of lithium battery recycling enterprises in China: implications for smart waste management and public health

The recycling of lithium batteries not only requires government guidance and support but also necessitates the deep involvement of enterprises to ensure sustainable production and promote circular economic development. Improper disposal and informal recycling of waste lithium batteries can release heavy metals and toxic electrolytes, posing potential threats to environmental safety and public health. Based on data related to lithium battery recycling enterprises in China, this paper utilizes spatial statistical methods and geographic detectors to analyze the spatial distribution patterns and influencing factors of these enterprises. The results indicated the following: (1) the overall spatial pattern of lithium battery recycling enterprises in China is characterized as having a "tiered" structure, with the eastern region consistently having the highest number of recycling enterprises, and a standard deviation ellipse shows the general temporal and spatial distribution trend in a south-north direction; (2) the spatial distribution of lithium battery recycling enterprises in China exhibits a significant positive spatial correlation, with a basically stable spatial pattern of cold and hot spots; Meanwhile, kernel density analysis indicates a gradual expansion of the spatial distribution, albeit with significant geographic polarization characteristics; (3) since 2013, lithium battery recycling enterprises have rapidly expanded, showing marked spatial differentiation within city clusters; and (4) the spatial distribution of these enterprises is significantly influenced by factors such as consumer spending levels and regional economic development, with all interaction factors showing a strong bi-factor enhancement effect. The findings provide guidance for developing smart waste-management systems to strengthen environmental governance and mitigate potential public health risks associated with lithium battery recycling.