DETERMINATION OF TOTAL DISSOLVED PHOSPHORUS IN WATER WITH UV/POTASSIUM PERSULFATE METHOD

The experiment conditions to determination of total dissolved phosphorus by UV/ potassium persulfate are studied.It suggests that the oxidation efficiency of organic phosphorus is the highest under UV/heat among the four experiment conditions,i.e.UV,heat,UV/heat,and heat/UV conditions.Furthermore,the acidity and concentration of oxidant which influenced on the oxidation efficiency of organic phosphorus compounds are investigated.The oxidation efficiency of organic phosphorus decreases significantly when Cl-and seawater exists.And the oxidation efficiency can be improved by increasing the power of UV lamp,reaction time,reaction temperature,and oxidant,and so on.