Research Of The Pollution Characteristics, The Pollution Control Targets And Disposal Methods Of Suzhou Creek Sediment

Suzhou Creek has a long history, Shanghai has witnessed the changes and development. Suzhou Creek was clear bottom, a wide variety of aquatic organisms. With the rise of modern industry and urban expansion from 1920 onwards Suzhou Creek Urban seasonal water quality deterioration, and eventually become a world-renowned urban pollution in the river. Shanghai municipal government attached great importance to the Suzhou River, in 2000 the official start of Suzhou Creek Rehabilitation Project. Sewage With the implementation of the project, the main stream of Suzhou River paragraphs have been greatly improve the water quality. However, due to non-point source pollution in sediments of water bodies continue to follow up the release of all types of organic pollutants, consumption of dissolved oxygen in water bodies, leading to deterioration of water quality, and even deterioration. As a result, sediment dredging for the radical Suzhou River water quality is essential.Suzhou River sediments along the way in the general distribution of the thickness of about 1- 2m, and the two sides showed thick, thin central, coastal thick convex, concave bank of the characteristics of the thin. Suzhou River sediments contaminated with oxygen and organic-based, supplemented by heavy metal pollution along the way have a greater distribution of difference in vertical distribution, COD_Cr, NH₄⁺-N, as well as heavy metal pollutants such as a clear peak distribution, At the bottom of the lower central high content also tends to lower the surface. NH₄⁺-N in water exceeding serious, DO serious shortage of heavy metal pollution in general is not prominent, but the content of the soil in Shanghai for more than several times the background value. Suzhou Creek sediment deposits 1,453,400 m³. Sediment pollution 985,400 m³.According to the papers of the characteristics of sediment pollution, soil quality standards, the Suzhou River toxic biological indicators of soil background values, the reference to the experience at home and abroad, a pollution control targets to determine the expectations of dredging soil line, Fang Xunqiang considered safe, depth of the landscape , Dredging works and other factors to determine the dredged soil line with the scale of dredging.Suzhou River is mainly oxygen and organic pollution, heavy metal pollution as a supplement, although generally solid, non-hazardous waste, according to the end of the water analysis report of the test, the end of water pollutants COD_Cr, NH₄⁺-N line can not be exceeded, we must To be able to deal with emissions standards. Papers in the bottom of this potential disposal site investigation on the basis of an in-depth study of the sediment dredged sediment flow and disposal. At present, domestic and international rivers of mud pollution control targets and methods of disposal of contaminated sediment study is not yet mature. In this paper, scientific innovation, the proposed pollution control targets to determine the depth of dredging, made an environmentally sound way to dispose of the contaminated sediment, not only solved the Suzhou River Sediment dredging of the key technical problems, returned home and abroad to provide management of urban rivers and lakes polluted Useful lessons.