Study On The Relase Law And Pollution Features Of Heavy Metals In The Sedimetns Of The Grand Canal Northern Section Of Jiangsu Provicne

The Grand Canal (Northern Section of Jiangsu Province)is east route of Water Transfer Project from South to North in China. Whose water quality will significantly affect the efficiency of Water Transfer Project from South to North .Apart from the transferred water quality being influenced by the imported water quality, the state of original heavy metals in sediments will have a significant effect on water quality Water Transfer Project's from South to North. As far as the factors above are concerned, a systematic research on the heavy metal pollution intensity in sediments of the Great Canal (Northern Section of Jiangsu Province) has been conducted with financial support of the Doctoral Fund of Chinese Ministry of Education.In the dissertation,Twenty three sediment of the Grand Canal (Northern Section of Jiangsu Province) were determined by XRD analysis and the results showed that the clay mineral is composed of kaolinite, llite, ontmorillonite and Illite/Montmorillonite interstratified minerals and the X-ray Diffraction pattern showed quartz is the main mineral.The concentration and fractions of Copper, Cadmium, lead, Zinc, Chromium, mercury, arsenic and total organic carbon in the fifty-six sediments in the Grand Canal(Northern Section of Jiangsu Province)were determined by Inductively Coupled Plasma Mass Spectrometry, double-channel atomic fluorescence spectrometer and liquid total organic carbon analyzer respectively .At the same time the statistical SPSS software was used to determine the correlation analysis and principal component analysis ,the results showed that the correlation coefficient between copper and zinc is 0.76 and the correlation coefficient between Toc and oxidized state is high.The heavy metal's pollution of the sediment were assessed by the Geoaccumulation Index, the Potential Ecological Risk Index and the health risk assessment and the results showed that the heavy metals in the sediment of the Grand Canal (Northern Section of Jiangsu Province)was not polluted by chromium, was lightly polluted by zinc, mercury and arsenic.Finally the sinks which were made of UPVC and used to simulate the channel under different conditions(temperature, velocity, pH value, concentration of complexing agents) in order to find the main impact factor. So the single experiment and the orthogonal experiment were carried out , and the results showed that velocity was the main impact factor and the mode was built.