Study On Ecological Control Technology Of Non-point Source Pollution Of Pesticide In Hongfeng Lake

Red maple lake as analysis object and extract has rivers converge,water quality and other related information,organochlorine pesticide survey,selected research of organic pesticides.The stationing water sampling,the concentration of organochlorine pesticides analysis experiments,quantitative determine the concentration of pesticide pollution in red maple lake,analysis of water source pesticide concentration distribution characteristics of the non-point source pollution.On the basis of the detection data,yaaph0.5.2 software evaluation index can be divided into several attributes,depending on the properties is divided into a number of different levels that the criterion layer and layer and index layer,from top to bottom at the mercy of the relationship between composition class times,building a model,comparing the pesticides on the weight of each sample point,choosing one of the biggest weight sampling points waters as research object,through the contrastive analysis of the non-point source control technology at home and abroad,combining with the characteristic such as red maple lake,river water quality,to set up suitable for red maple lake ecological resistance of non-point source pollution control technology –“3RE”model.In this paper,main conclusions are as follows:(1)Market researching access to information etc,to determine the study of organochlorine pesticides for the 10.According to the relevant data of Hongfeng Lake survey,obtain the hydrological environment of Hongfeng Lake and other information,to determine the Hongfeng Lake four tributaries(TaoHuaYuanRiver,HouWu river,MaXian river,Yang Changhe)10 sampling points layout.(2)Using gas chromatography/mass spectrometry instrument(Agilent7890B,450-450-GC/Mc)detect 10 kinds of organochlorine pesticides in water samples.(3)Different concentrations of organochlorine pesticides peak area linear regression analysis it,that is concluded that the linear correlation coefficient R2 between 0.9687 to 0.9965,good linear.(4)S1-S10 sampling points,the 666 the average density is more than 30 ug/L,the highest concentration of spring,the four isomers of ?-666,high detection rate of concentration range of ND-38.5ug/L,the highest detection section in S4 section,the S8 section;Chlorothalonil,triadimefon,pythium,three kinds of pesticides,pythium,the detection rate is relatively high,S7 section and check out the highest rate in the spring,the concentration of ND-36.6ug/l;Spring with ester,armor cyanogen chloride fluorine chrysanthemum ester were detected,and armor cyanogen chrysanthemum ester content detection rate.(5)The degree of pesticide pollution of red maple lake,HouWu river >YangChang river >MaXian river >TaoHuaYuan.In time,in January the most pesticides were measured.(6)Yaaph0.5.2 software modeling research of three kinds of pesticide for 10 sampling point pollution severity,it concluded that chlorine pesticide pollution machine sample point sort of S5 > S8 > S7 > S9 > S6 > S4 > S10 > S2 > S1 > S3.after noon river enters the section(ping village village)for S5 the key area of pesticide pollution control,select the triadimefon,pythium noon after pesticide as S5 river enters section(ping village village)key control pesticide of the area of the sample point.(7)In this paper,we propose the "3RE" to implement the source reduction of source control technology-pre blocking-ecological restoration so as to achieve the control of process and region.Based on the "3RE" model,the effect of the combined system of ecological ditch and artificial wetland on the removal of organochlorine pesticides in the sampling point of the S5 River inlet section of the second river was studied.(8)The analysis of changes in HRT system experimental ecological ditch + artificial wetland(1d,1.5d,2d,3d),under the condition of different species(reed and calamus)for different pesticides(three Triadimefon,procymidone)adsorption effect.The combination of ecological ditch and artificial wetland removal effect of Triadimefon three better,for plant roots(three Triadimefon,procymidone)better absorbing effect is iris,A combined artificial wetland for reed,on the removal of Triadimefon three rate reaches 72%,to procymidone in addition to the rate of up to 79%;combination of ecological ditch part of reed,calamus wetland species.The removal rate of three Triadimefon was up to 50%,and the removal rate of Pythium was up to 60%.When the water retention time was 2d,the removal efficiency of the three pesticides was the best.