[Occurrence Characteristic and Risk Assessment of Microplastics in Sishui River (Xingyang Section)]

Area of Science:

• Environmental Science
• Analytical Chemistry
• Ecotoxicology

Context:

• Urban rivers act as conduits for microplastic pollution.
• Understanding microplastic contamination in urban rivers is crucial for effective pollution control strategies.
• The Sishui River, a Yellow River tributary, was investigated for microplastic pollution.

Purpose:

• To characterize microplastics in sewage outlets of the Sishui River.
• To assess the environmental risk posed by microplastics in the studied urban river.
• To identify the types, sizes, shapes, and polymers of microplastics present.

Summary:

• Microplastics, predominantly transparent fibers and fragments under 500 μm, were identified in Sishui River sewage outlets.
• Polyethylene terephthalate (PET) and polyethylene (PE) were the main polymer types, showing a significant correlation suggesting a common origin.
• Environmental risk assessment highlighted PVC as a high-risk microplastic type, though the overall pollution load index indicated low risk.

Impact:

• This study provides critical data for managing microplastic pollution in urban river systems.
• Findings inform targeted strategies for mitigating microplastic entry into aquatic ecosystems.
• The research contributes to understanding the environmental fate and ecological impact of microplastics in rivers.