The study looked at pollution in the water and sediment of Guyun River and Jinshan Lake in Zhenjiang City. They found that nitrogen levels in the water and sediment were higher than recommended levels, indicating pollution. The type of nitrogen pollution varied between the lake and river sediment samples. The researchers also found that organic nitrogen pollution was present in some of the samples. Overall, the study shows that pollution is a concern in these water bodies, which could impact the local environment and wildlife.