Microbicides Of Farmland Sewage Analysis Determination And Remove Research Method

Agriculture in China has thousands of years of history, with the devolpment ofagriculture, the chemical fertilizers and pesticides has a great influce to agriculture.Fungicide have already accepted by more and more people and attract attention inagricultural. This paper is based on the analysis of the shenyang agricultural water,which analyse the three pesticide bactericides of Carbendazim,Thiram,Metalaxyl, andstudy the method of how to remove the pollutant.In the process of study, a method of solid-phase microextraction was used aspretreatment, using high performance liquid chromatography (HPLC) determinationof method trace pollutants carbendazim in sewage. Get standard linear regressionequation is Y=3185+465X, correlation coefficient R=0.9992, carbendazim detectionlimit for0.0008μg/mL, and the average recovery was98.44%. The high sensitivitythan the high performance liquid chromatography (HPLC) method with a single morethan5times. At the same time, we also study the method to eliminate thecarbendazim, which using ultraviolet germicidal lamp and ultrasonic to remove. Andcombine two methods of removing, removal rate reached97.4%，the effect is evenbetter.A method of solid-phase microextraction was used as pretreatment, using highperformance liquid chromatography (HPLC) determination of method trace pollutantsthiram in sewage. Get standard linear regression equation is Y=1247.5+512.5X,correlation coefficient R=0.9995, thiram detection limit for0.0009μg/mL, and theaverage recovery was98.81%. The high sensitivity than the high performance liquidchromatography (HPLC) method with a single more than5times.At the same time,wealso study the method of removing carbendazim. Using granular activated carbon andactivated carbon powder to remove, remove more than97%.A method of solid-phase microextraction was used as pretreatment, using highperformance liquid chromatography (HPLC) determination of method trace pollutantsmetalaxyl in sewage. Get standard linear regression equation is Y=740.5+481.5X,correlation coefficient R=0.9996, metalaxyl detection limit for0.0017μg/mL, and theaverage recovery was99.48%. The high sensitivity than the high performance liquid chromatography (HPLC) method with a single more than3times. We also study the method of removing metalaxyl, respectively, by usingozone and ultraviolet lamp removal, removal rate of63.9%,94.1%respectively.theremoval rate is not as good as we thought, but with the combination of the twomethods, the removal rate reached98.1%. The removal method does not causesecondary pollution, and short time and high efficiency.