Temporal and Spatial Variation Rule of Mercury in Sediments in Middle and Lower Reaches of the Second Songhua River;

Nitrogen Content Dynamic Variation Analysis in the Second Songhua River.;

Temporal and Spatial Variation Rule of Methylmercury in Water in the Second Songhua River;

Study on self-purification of the Second Songhua River polluted by mercury in past 20 years;

Management of surveying and mapping data in Second Songhua River Geographic Information System based on ArcSDE;

Contents and Potential Ecological Risk of Heavy Metals in Middle and Lower Reaches of Second Songhua River

Human Hair Mercury Levels in the Residents Living along the Second Songhuajiang River and the Influencing Factors;