The Study On Removal Of Micro-polluted Sourse Water By Zeolite/TiO₂/UV

With the increasing water pollution of surface water and the continuous improvement of water quality standards,the drinking water treatment technology put forward new requirements.The traditional treatment process can not effectively remove ammonia nitrogen and organic pollutants,to meet people's drinking water quality requirements,so that urban water supply security is facing great hidden dangers.Huangjia Lake is located in southwest of Wuhan,the water area of 85.1 hectares,are micro-polluted water.In recent years,with the surrounding schools,residential areas,the rise of commercial areas,exacerbated the deterioration of water quality.In this paper,Huangjiake Lake was used as the research object,and the modified zeolite/TiO₂/UV was used to treat the micro-polluted water of Huangjiahu.The high oxidation of TiO2 and the strong adsorption properties of zeolite are widely used in water treatment at home and abroad.And the two joint treatment of micro-polluted water at home and abroad are rare research.In this paper,the modified zeolite and TiO₂/UV alone were used to study the micro-polluted source water of Huangjiahu Lake.The results show that the modified zeolite with the concentration of 1 mol·L^-11 NaCl solution as the activator has the advantages of large effective pore size,low spatial structure resistance,fast internal diffusion rate,large exchange capacity,The effect of treatment was remarkable,and the removal effect of organic matter was not obvious.While the longer the hydraulic retention time,the better the treatment effect,but more than 60min,the removal rate of the material is not obvious.On the other hand,because of its high oxidation,the removal efficiency of organic matter is only 80%when the micro-polluted source water of Huangjiahu is treated under UV condition alone.However,the removal of ammonia nitrogen and turbidity is affected by water The effect is not obvious.In order to improve the treatment effect,the modified zeolite/TiO2/UV was used to treat the micro-polluted water of Huangjiahu.The results show that the modified zeolite plays a dominant role in the removal of ammonia nitrogen during the combined treatment of modified zeolite and TiO2.TiO2 plays a key role in the removal of organic matter.The effect of the treatment at the time of the joint treatment is superior to that of the treatment alone.In the factor analysis experiment which affects the joint treatment,the test results show that the smaller the particle size is within a certain range?200 mesh to 50 mesh?,the better the treatment effect of ammonia nitrogen,the smaller the particle size is too small will reduce the pollutants and zeolite The internal structure of the collision,the treatment effect but become low.Temperature,pH,UV intensity and UV wavelength will affect the oxidation of TiO₂,which affects the level of organic matter,but has little effect on ammonia nitrogen.It is worth mentioning that the turbidity of the changes in the resistance of each factor is strong,the removal rate is basically not affected by changes in various factors.It is concluded that the modified zeolite/TiO₂/UV combined treatment of micro-polluted source water does not need to change the temperature and pH of the water body.The range of the particle size and UV intensity of the modified zeolite is wide,In the pretreatment of micro-polluted water sources have a greater advantage.