Spatial and temporal distribution characteristics of antibiotics and heavy metals in the Yitong River basin and ecological risk assessment.

Thus, the results indicate that the heavy metal pollution in the Yitong River Basin in Changchun city showed a decreasing trend in heavy metal pollution levels with seasonal climate changes, such as increased rainfall and larger surface runoff and had a 28.5% decrease in the Nemerow Composite Pollution Index from June to October.

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In terms of seasonal changes, NOR and OFL showed a trend that had lower human health risks during summer than in winter.

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