太湖典型入湖河流氮的污染特征研究.doc

太湖典型入湖河流氮的污染特征研究

太湖典型入湖河流氮的污染特征研究(8700字)摘要：通过对太湖典型入湖河流洪巷港、沙塘河、烧香港、殷村港漕桥河、太滆运河直湖港、武进港、乌溪港、大港河和望虞河进行布点采样，分析水体和表层沉积物中的氮及其形态。研究表明：入湖河流水质TN浓度在1.75-...

<p>太湖典型入湖河流氮的污染特征研究(8700字)<br/>
摘&nbsp;要：通过对太湖典型入湖河流洪巷港、沙塘河、烧香港、殷村港漕桥河、太滆运河直湖港、武进港、乌溪港、大港河和望虞河进行布点采样，分析水体和表层沉积物中的氮及其形态。研究表明：入湖河流水质TN浓度在1.75-4.07mg/L之间，平均浓度为2.95mg/L，NH4+-N浓度在0.14-2.1mg/L之间，平均浓度为0.76mg/L，NO3--N浓度在0.59-2.00mg/L之间，平均浓度为1.24mg/L，NO3--N占TN的比例为42.03%，为氮的主要形态，按《地表水环境质量标准》评价各河流TN浓度，除烧香港、望虞河属于Ⅴ类水体外其余9条河流均为劣Ⅴ类水体；河流表层沉积物中NH4+-N平均浓度为223.95mg/kg，NO3--N平均浓度仅为1.15mg/kg，NH4+-N平均浓度为NO3--N平均浓度的195倍，为主要的氮形态。<br/>
关键词：太湖；入湖河流；氮污染<br/>
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STUDYONCHARACTERISTICSOFNITROGENPOLLUTIONINTHETYPICALRIVERENTERINGLAKETAIHU<br/>
Abstract:ThroughstationingsamplingatTaiHulakefloodlaneHongxiangport,Shatangriver,Shaoxiangport,Yincunport,Caoqiaoriver,Taigecanal,ZhiHuport,wujinport,Wuxiport,dagangriverandWangyurive,whicharethetypicalriverfloodintothelakeofTaihu,analysisnitrogenandthemorphologicalinthesurfacesedimentsandwater.theresultsshowthat:theTNconcentrationoftheinflowingriverswaterqualityarrangesfrom1.75to4.07mg/L,andaverageconcentrationis2.95mg/L,theconcentrationofNH4+-Nisfrom0.59to2.00mg/L,andaverageconcentrationis0.76mg/L;theconcentrationofNO3--Nisfrom0.14to2.1mg/L,andaverageconcentrationis1.24mg/L;theNO3&mdash;Naccountingfor42.03%inTNconcentration,isthemainformofnitrogen.Accordingtothesurfacewaterenvironmentqualitystandard,evaluationsabouteachriver'sTNconcentrationindicatethatnineriversarebadⅤkindofwater,besidesthatothertwoShaoxiangportandWangyurivebelongtoⅤkindofwater.TheaverageconcentrationofNH4+-Ninriversurfacesedimentis223.95mg/kg,andtheaverageconcentrationofNO3--Nisjust1.15mg/kg,NH4+-Nis195timesaverageconcentrationofNO3--N,asthemainformofnitrogen.<br/>
Keywords:Taihu；Inflowingrivers；Nitrogenpollution<spanclass='Stz264'></span></p>

<p><br/>
目&nbsp;&nbsp;&nbsp;录<br/>
摘&nbsp;要1<br/>
关键词1<br/>
1&nbsp;前言2<pclass='Stz264'></p><br/>
2&nbsp;材料与方法3<br/>
2.1&nbsp;研究区概况3<br/>
2.2&nbsp;样品的采集及预处理4<br/>
2.3&nbsp;样品的测定7<br/>
2.3.1&nb