Study On The Treatment Plan Of Water Supply Plant To Deal With Burst Aniline Pollution

The burst pollution of the water source has drawn widespread concern in society which caused by the hysteresis of emergency measures. Because of the water supply plant as the last point controlling the water source pollution,the treatment plan of water supply plant to deal with the burst pollution has became a hot spot.Aimed at burst aniline pollution in the water source,in order to further improve the emergency capability of water supply plant applying activated carbon adsorption technology,the paper systematically studied the emergency capability of different active carbons and explored the handling ability of the combined process of powder activated carbon(PAC) and granular activated carbon(GAC) on aniline pollution taking Harbin water source in Songhua River as the research object to provide technical support for emergency treatment of aniline in water supply plant.According to the research results of adsorption capacity and adsorption speed experiment,we can make the conclusion that the wooden activated carbons(1#,Tianjin) have the best adsorption effect on aniline.When the dose is 80mg/L,the PAC can deal with the distributed water which aniline concentration exceeded six times.However, the other PACs only can deal with the polluted water which aniline concentration exceeded three to five times.The adsorption capacity of 1# PAC was affected when there were competitive organics in the water,the PAC can deal with the water source which aniline concentration exceeded three times under the same conditions.By the low temperature nitrogen adsorption,phenol adsorption,iodine adsorption and Boehm titration knowable,the wooden activated carbons(1#,Tianjin),the wooden activated carbons(4#,Henan) and the wooden activated carbons(5#,Guangdong) have the better specific surface area, pore volume and alkaline functional groups.The better adsorption effect of the three PAC illustrates that the physical and chemical properties have an influence on the adsorption. The trend of the change of the adsorption effect is positive to the specific surface area, pore volume and alkaline functional groups.The PAC was modified by acid and alkali according to the characters.According to the results,the three modification methods can improve the adsorption effect of PAC on aniline.The PAC modified by KOH has the bigger specific surface area, pore volume and alkaline functional groups.The changes make it has the highest adsorption capacity and the adsorption capacity change from 1.94mg/g to 6.31m/g.When the dose is 80mg/L,the modified PAC can deal with the water source which aniline concentration exceeded seven times. The adsorption capacity of PAC modified by NaOH and HCl has no obvious change.In additional,the adsorption effect of PAC on aniline would been enhanced with the increasing dose of PAC,when the dose is 200mg/L,the PAC modified by KOH can deal with the water source which aniline concentration exceeded eleven times.Furthermore,we also studied handling ability the combined process of PAC and GAC on aniline pollution,the results showed that applying the unmodified combined process,the combined process can deal with the Songhua River water source which aniline concentration exceeded six point two times.The combined process modified by KOH can deal with the Songhua River water source which aniline concentration exceeded eleven times without cycling treatment.The combined process modified by KOH can deal with the Songhua River water source which aniline concentration exceeded seventeen point five times under multiple cycling treatment.