本文選題：城市面源污染 + 復合滲濾系統(tǒng)��； 參考：《清華大學》2015年碩士論文

【摘要】：城市徑流沖刷地表并攜帶污染物進入城市水體,將引發(fā)一系列的環(huán)境問題。為了定量了解城市徑流污染物的特征并解決城市徑流污染的問題,本研究選擇典型快速城市化區(qū)域無錫市濱湖區(qū)作為研究區(qū)域,監(jiān)測并評價目標地區(qū)降雨徑流面源污染狀況,并針對城市徑流污染問題進行綜合控制技術(shù)的開發(fā),取得的主要研究成果如下:(1)無錫地區(qū)降水豐沛,降雨量年際變化小,其快速化城區(qū)道路徑流中營養(yǎng)物污染嚴重,需要處理后排放,該地區(qū)重金屬污染水平較低;(2)雨前干期、峰值雨強、峰值流量、累積降雨量、峰值降雨量、季節(jié)和下墊面都會對徑流污染水平產(chǎn)生一定影響,在單場降雨中,降雨初始污染物濃度較高,后期徑流污染物濃度較低,無錫地區(qū)道路徑流初始沖刷較為明顯;(3)不同組合填料滲濾系統(tǒng)對雨水徑流中TSS、COD和TP均具有較好的去除效果,在復合滲濾系統(tǒng)內(nèi)種植植物對系統(tǒng)出水濃度的影響較小,使用人工填料的系統(tǒng)要優(yōu)于原生土壤系統(tǒng);(4)在復合滲濾系統(tǒng)中外加木屑作為碳源能顯著提高系統(tǒng)對徑流中TN和NO3--N的去除效率,但會對徑流中COD、TP和NH3-N的去除效率產(chǎn)生不利影響。將木屑與填料混合放置的方式能達到更高的TN去除效率,并減少木屑中污染物質(zhì)的溶出;(5)高效吸附凈化帶具有較好的徑流污染削減效果,其在長期運行過程中對徑流中TSS、COD、TP、DTP、TN、NH3-N、NO3--N和NO2--N的平均去除率分別達89.9%、58.5%、80.9%、51.0%、54.8%、77.6%、46.5%和74.0%,有效減少通過道路徑流進入水體的污染物總量;(6)地下潛流阻隔墻具有較好的徑流污染削減效果,改變填料柱中木屑的配比對系統(tǒng)去除率影響較小,具有不同木屑配比的兩個系統(tǒng)對徑流中TSS、COD、TP、TN、NH3-N、NO3--N和NO2--N的去除率分別達92%、70%、90.9%、70.3%、57.7%、93.1%、91.6%和90%、70%、91.2%、71.8%、58.8%、92.9%、90.7%;(7)原位凈化蓄水停車位在長期運行過程中對徑流中TSS、COD、TP、DTP、TN、NH3-N、NO3--N和NO2--N的平均去除率分別達89.3%、66.4%、83.3%、55.3%、43.6%、86.8%、28.5%和75.8%,有效減少了通過停車位表面徑流進入水體的污染物總量。
[Abstract]:Urban runoff scouring the surface and carrying pollutants into urban water will lead to a series of environmental problems. In order to quantitatively understand the characteristics of urban runoff pollutants and solve the problem of urban runoff pollution, this study selected the typical rapid urbanization area, Wuxi Binhu District as the research area, monitoring and evaluating the non-point source pollution of rainfall runoff in the target area. The main research results are as follows: (1) Wuxi has abundant precipitation, little annual variation of rainfall, and serious nutrient pollution in urban road runoff. After treatment, the heavy metal pollution level in this area is lower than that in the dry period before rain. Peak rain intensity, peak flow, accumulated rainfall, peak rainfall, season and underlying surface all have certain effects on the level of runoff pollution. The initial pollutant concentration of rainfall was higher than that of late runoff, and the initial scour of road runoff in Wuxi area was obvious. (3) different combinations of fillers and leachate systems had better removal effects on both Rain Water and TP in runoff. Planting plants in the compound leachate system has little effect on the effluent concentration of the system. The system using artificial fillers is better than the original soil system (4) the addition of wood chips as carbon source in the composite leachate system can significantly improve the removal efficiency of TN and NO3-N in runoff, but it will have a negative effect on the removal efficiency of COD ~ (2 +) and NH _ (3-N) in runoff. The mixed placement of wood chips and fillers can achieve higher TN removal efficiency, and reduce the dissolution of pollutants from wood chips. (5) the high efficiency adsorption and purification belt has better runoff pollution reduction effect. In the long run, the average removal rates of TSSCODTPN and NO2-N in runoff are 88.9%, 58.50.90% and 77.66.5%, respectively. The subsurface flow barrier wall can effectively reduce the total amount of pollutants entering the water body by road runoff. Changing the proportion of sawdust in the packing column has little effect on the removal rate of the system. 鍏鋒湁涓嶅悓鏈ㄥ睉閰嶆瘮鐨勪袱涓郴緇熷寰勬祦涓璗SS,COD,TP,TN,NH3-N,NO3--N鍜孨O2--N鐨勫幓闄ょ巼鍒嗗埆杈，

本文編號：2002518