A strictly regulated MCL for a particular Nilotinib AMN-107 pesticide to 0.1 lg L 1 and the sum of all pesticides at least 0.5 lg L 1 Including, Lich byproducts of degradation. Once alachlor immersed in spring water with a concentration above the MCL regulated, have appropriate procedures for water treatment in order to comply with drinking water. However, the basic operations of the Herk Mmlichen water treatment such as oxidation by permanganate prior to show, coagulation, filtration and chlorination poor cleaning performance for alachlor. The use of ozone for disinfection and oxidation of drinking water is widespread throughout the world. However, the ozonation was in conventional water-plants do not completely Requests reference requests getting away from alachlor, usually a removal efficiency reached about 63%. Complete Ndiger degradation of alachlor has at h Occurred higher doses of O3. The second order rate constant of alachlor molecular ozone is relatively low, w While those with OH is the rate of diffusion controlled EEA. Therefore, advanced oxidation process was created, the abundant OH is highly effective in removing alachlor. The combination of the O3 H2O2 is the most hours Ufigsten used COM PDO in water plants. The reaction is described as follows: HO 2 O 3 t! OH O O 2 t 2 t, k 2:08 106M1s1 E1T for drinking water treatment is completely one Requests reference requests getting alachlor mineralization often not m Possible. Therefore, w re Conversion of alachlor may need during the direct ozonation and AOP O3/H2O2 byproducts of degradation to be a lot. Were concerns about the sub-degradation products of some pesticides were equal or even st Increased more strongly formed toxic than their parent compound. To date, however, identification of degradation by-products may need during the ozonation and AOP alachlor direct O3/H2O2 is limited, and the associated degradation pathways are unclear. With this background, the main objectives of this study were: Identify the byproducts of the degradation of high molecular weight, by n the formation of by-products of low molecular weight, namely the smaller S quantify acid organic and inorganic anions, and suggest pathways of alachlor by O3 and OH. In addition, the kinetics alachlor and Ver Change the toxicity of t L Solution of alachlor and O3/H2O2 O3 may need during the treatment. Second Materials and methods 2.1. Standards and reagents alachlor, propachlor and horseradish peroxidase were purchased from Sigma Aldrich. N, N-diethyl p-phenylenediamine was obtained from Alfa Aesar Ltlich. Sodium acetate, propionic Acid and potassium chloride were supplied by Sinopharm Chemical Reagent Beijing Indigo Co, Ltd., and sodium formate were purchased from Tianjin Institute of Fine Chemicals Jingke. Sodium oxalate and mono chloroacetic Acid were purchased from Tianjin Reagent No. 1 plant. Other chemicals were at least analytical grade and used without further purification. 2.2. Analytical methods alachlor was coupled at 230 nm by high performance liquid chromatography with a diode array detector determined. The separation was performed with a Waters Atlantis S Column with a gradient elution of 0.2 ml min1. The mobile phase consisted of HPLC grade water and acetonitrile and the gradient elution was carried out as follows: contribution of 70% A and held for 30% B for 5 min, linear ramp to 50% A and 50% B over 5 m.