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1、第32卷第2期環(huán)境科學學報V0I.32.No.22012年2月ActaScientiaeCircumstantiaeFeb.,2012榮偉英,周啟星.2012.大沽排污河底泥釋放總氮的影響[J].環(huán)境科學學報,32(2):326.331RongWY,ZhouQx.2012.InfluencingfactorsoftotalnitrogenreleasefromsedimentsintheDagudrainagefiver[J].AetaScientiaeCircumstantiae,32(2):326.331大沽排污河底泥釋放總氮的影響榮偉英,周啟星
2、南開大學環(huán)境科學與工程學院,環(huán)境污染過程與基準教育部重點實驗室,天津市城市生態(tài)環(huán)境修復與污染防治重點實驗室,天津300071收稿日期:2011—04—04修回日期:2011.07.05錄用日期:2011—07.15摘要:在實驗室模擬條件下,考察了上覆水的溶解氧DO、pH值、溫度、含鹽量及擾動速率等環(huán)境因子對大沽排污河底泥釋放總氮的影響.結果表明:厭氧條件下底泥釋放總氮的強度高于好氧條件和自然條件下的釋放強度;上覆水的pH呈中性時底泥釋放總氮的強度最大,酸性條件下底泥釋放總氮的強度高于堿性條件;升高溫度可促進底泥釋放總氮;擾動可提高底泥釋放總氮的強度,
3、但當擾動速率增加到一定程度時,反_面會抑制總氮的釋放,因此,至最后實驗結束時,擾動速率為6Or·minI1的體系中底泥釋放總氮的能力最強;當實驗達到平衡時,含鹽量為0mg·L的體系中底泥釋放總氮的能力最強.關鍵詞:底泥;總氮;環(huán)境因子;上覆水文章編號:0253-2468(20l2)02—326—06中圖分類號:X171文獻標識碼:AInfluencingfactorsoftotalnitrogenreleasefromsedimentsintheDagudrainageriverRONGWeiying,ZHOUQixingMOEKeyLaborato
4、ryofPollutionProcessesandEnvironmentalCriteria,TianjinKeyLaboratoryofEnvironmentalRemediationandPollutionControlCollegeofEnvironmentalScienceandEngineering,NankaiUniversity,Tianjin300071Received4April2011;receivedinrevisedform5July2011;accepted15July2011Abstract:Theeffectofenvi
5、ronmentalfactorsincludingdissolvedoxygen(DO)inoverlyingwateranditspH,temperatureandsalinity,andvelocityofdisturbanceonthereleaseoftotalnitrogenfromsedimentsoftheDagudrainageriverwereinvestigatedundersimulatedtestconditions.Theresultsshowedthatwhenoverlyingwaterwasinanaerobiccon
6、ditions,theintensityoftotalnitrogenreleasewashigherthanthatunderaerobicandnaturalconditions.TheintensityoftotalnitrogenreleasefromsedimentsreachedthehighestlevelwhenpHoftheoverlyingwaterwasneutral,andtheintensityoftotalnitrogenreleasefromsedimentswashigherwhentheoverlyingwaterw
7、asacidicthanalkaline.Anincreaseintemperaturecouldpromotethereleaseoftotalnitrogenfromsediments.Thedisturbanceofoverlyingwatercouldincreasetheintensityoftotalnitrogenreleasefromsediments.However,theintensityoftotalnitrogenreleasedecreasedwhenthevelocityofdisturbancewastoohigh.Th
8、eintensityoftotalnitrogenreleasewashighestwiththeveloc