地表水中高锰酸盐指数测定的分光光度法与密封消解法的研究市政工程专业论文.docxVIP

重庆大学 重庆大学硕士学位论文 英文摘要 PAGE PAGE VI ABSTRACT China is a shortage of water resources country. Per capita water resources, which amount to 2500 m3, is only 1/4. of the world per capita consumption While a long time, the water using models of “exploitation - using - waste water discharge” leads to subject of water resources and water quality deterioration of the ecosystem destruction in most cities in China. More than 80 percent sewage without the effective treatment directly draw into the water, resulting in 1/3 polluted river, more than 90 percent of the urban waters is heavily polluted, of which the largest contributor to organic pollutants in China. Many of the large number of organic pollutants directly threaten the living environment and human health. As Chinas main surface water pollution index, Permanganate Index (CODMn), which generally reflects the contamination degree of reducibility substance (mainly organic pollutant) in waters, is an vital regular .monitoring index in the Drinking Water Sanitary Standards (GB5749-2006) which is already put into effect in 2007. At present, the national standard methods (GB11892-89) or the standard methods in water and wastewater monitoring and analysis methods (these two ways is equivalent) are adopted to determine permanganate index. The GB method or standard method of monitoring the water quality CODMn is in existence at the cost of energy consumption, time consuming, the operation tedious, low sensitivity, lower accuracy and precision and likely to cause secondary pollution of the environment and to meet the demand for batch processing and other shortcomings. Aiming at the disadvantages of GB method, the two new methods spectrophoto -metry and seal digestion are explored and studied to determine CODMn of surface water. In the thesis, the testing conditions are optimized through experiment. The opti -mized conditions of detecting CODMn by spectrophotometry and seal digestion me- thod are identified in surface water. An