Study On Emergency Treatment Of The Sudden Aniline Pollution Of Drinking Water Sources

In recent years, various sudden pollution events frequently occur (especially suddenwater source pollution events). Not only do they have a huge impact to the society andpeople’s lives and economic losses, but also has an increasing trend in pollution levels. Inaddition, so far, our emergency water treatment technology is still not perfect and furthertheoretical research needs to be done that for practical applications. Therefore, how to governthe contaminated water has become to be a solved problem.Raw water used in the experiment is taken from the Lanzhou section of Yellow River. Inthe experiment, aniline is used as research object. Aniline is a higher toxicity organics and isalso more common, which can be detected in many chemical wastewater. The experiment ismainly divided into two parts: the tap water sample and the Yellow River water sample. Thetwo parts both have study of the potassium permanganate oxidation, activated carbonadsorption and removal technique which is associated with the two methods.The first part of the experiment is tap water sample, which is constituted by potassiumpermanganate oxidation, activated carbon adsorption, and technique handled in the two ways.Potassium permanganate oxidation and activated carbon adsorption are done from pH ofwater samples and pharmaceutical dosage, reaction time and concentration of water samples.As to activated carbon adsorption, GAC and PAC are used as comparative study, alsoconsidering removal effect from adding methods. In combined treatment technology,pharmaceutical adding order has been considered. The results show that: the optimal dosageof potassium permanganate oxidation of aniline is16mg/L (removal rate is85.693%), thebest conditions of pH is8-9(close to pH of the running water samples), time of oscillation is30min; Adding method of activated carbon adsorption of aniline is wet adding, the optimaldosage is400mg/L, pH and oscillation time of a better removal is the same as potassiumpermanganate oxidation; to the combined process, pharmaceutical adding order is addingPAC before potassium permanganate, optimal adding ratio is0.6g/L:5mg/L(PAC:potassium permanganate).The second part of the experiment is the Yellow River sample, this part of the experimentis constituted by potassium permanganate, PAC technology and combined use of the twotreatment technology. In respective treatment technology, the removal effect on aniline ofpotassium permanganate and PAC is comparatively studied. In the combined treatmenttechnology, impact of various factors on the removal is discussed. At the same time, theremoval of aniline in the Yellow River water samples and tap water samples removal alsoformed comparative study. The experimental results show that: the processing cost ofindividual treatment technologies is relatively higher than the combined treatment technology.In the raw water samples, the effect of potassium permanganate and PAC is better than tap water. The pharmacy adding sequence is still adding PAC before potassium permanganate.Other influential factors are basically the same as tap water. In addition, the results also showthat, adding powdered activated carbon at the intake point of powdered is better.