Analysis Of Pollutant Source And Strategies Of Pollutant Prevention And Control Of Dagu Sewage River

The land source pollutants are the main cause of Bohai Sea pollution, and the sewage rivers are the major land-sourced pollutant contributors. Therefore, the study of Sewage River pollution plays an important role in the control of ocean pollution.Most research was focused on Dagu Sewage River in this paper. Sample points were setted according to the pollution sources position and point-setting principle. Samples were taken monthly. The main toxic and harmful substance was monitored qualitatively and quantitatively by GC-SM and GC-FID. The pollution level was analyzed by single factor evaluation method and priority pollutants list was confirmed. Furthermore, sample points were taken in the upstream and downstream of pollution sources points and samples were monitored. Factor analysis was applied to pollutant source analysis. The main pollutants of every pollution sources point and their effects were confirmed. Based on above all, control and prevention strategies of land-sourced pollutant emission were put forward.The results showed that in Dagu River, the organic pollution were major in the forms of CODCr and NH₃-N while the heavy metal pollution were basically Zn, Cr and Cd .Zn pollution the was caused by the dye wastewater discharge of Nanbin Chemical Plant. Electrolytic and chemical wastewater from Dagu Chemical Plant led to heavy metal pollution of Cr and Cd. The PAEs background content of Dagu River was high. PAEs pollution was mainly in the form of DBP and higher than the first-class standard of National Discharge Standards. Detection rate and detection level of benzene and toluene was higher in sewage outlet.