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1、第26卷第3期環(huán)境科學(xué)Vol.26,No.32005年5月May,2005ENVIRONMENTALSCIENCE長江中下游淺水湖泊沉積物對(duì)磷的吸附特征11*2113王圣瑞,金相燦,趙海超,龐燕,周小寧,楚建周(11中國環(huán)境科學(xué)研究院湖泊生態(tài)環(huán)境研究中心,北京100012;21內(nèi)蒙古農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,呼和浩特010018;31河北農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院,保定071001)摘要:研究了長江中下游淺水湖泊11個(gè)沉積物對(duì)磷的吸附等溫線及其吸附動(dòng)力學(xué),并分析了沉積物理化特征對(duì)磷吸附特征的影響,研究發(fā)現(xiàn):1沉積物對(duì)磷酸鹽的吸附主要在前10h內(nèi)完成,在015h內(nèi)吸附反應(yīng)十分
2、迅速,并逐漸達(dá)到吸附平衡;o沉積物本底吸附態(tài)磷與其有機(jī)質(zhì)、CEC、總磷、無機(jī)磷、有機(jī)磷、Fe/A-l磷和總氮顯著正相關(guān);對(duì)磷酸鹽的最大吸附量與其CEC和無機(jī)磷、有機(jī)質(zhì)和總磷呈顯著負(fù)相關(guān);而總最大吸附磷量與其有機(jī)質(zhì)、CEC、總磷、無機(jī)磷、有機(jī)磷、Fe/A-l磷和總氮含量呈顯著正相關(guān);?就目前長江中下游淺水湖泊的水質(zhì)而言,其沉積物存在解析;沉積物對(duì)磷酸鹽的吸附-解吸平衡濃度與其有機(jī)質(zhì),CEC,總氮,總磷以及各形態(tài)磷含量均有顯著的正相關(guān)關(guān)系.本研究條件下,即使是污染較為嚴(yán)重的湖泊,其沉積物也具有向上覆水體釋磷酸鹽的趨勢(shì).關(guān)鍵詞:沉積物;磷酸鹽;吸附速率;吸附量;沉積
3、物組成;長江中下游;淺水湖泊中圖分類號(hào):X143文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):0250-3301(2005)03-0038-06PhosphateAdsorptionCharacteristicsontotheSedimentsfromShallowLakesintheMiddleandLowerReachesoftheYangtzeRiver112113WANGSheng-rui,JINXiang-can,ZHAOHa-ichao,PANGYan,ZHOUXiao-ning,CHUJian-zhou(11ResearchCenterofLakeEnvironmen
4、t,ChineseResearchAcademyofEnvironmentScience,Beijing100012,China;2.CollegeofAgronomy,InnerMongoliaAgricultureUniversity,Huhhot010018,China;3.CollegeofResourceandEnvironment,HebeiAgricultureUniversity,Baoding071001,China)Abstract:Adsorptionisothermsandkineticsofphosphateontothe11sedi
5、mentstakenfromshallowlakesinthemiddleandlowerreachesoftheYangtzeRiverweredeterminedinlaboratory,andtheeffectofphysicalandchemicalpropertiesofthesedimentsonitsphosphateadsorptioncharacteristicswasalsoanalyzed.Theresultsindicatethat:1Theprocessofphosphateadsorptionontosedimentsmainlyo
6、ccurredwithin0~10h,themaximumadsorptionratesoccurredwithin0~015h,andthenattendstoadynamicequilibrium;oBetweentheNAPanditsorganicmatter,CEC,totalphosphorus,inorganicphosphorus,organicphosphorus,Fe/A-lphosphorusandtotalnitrogenhaveremarkablepositivecorrelation;betweenthemaximumadsorpt
7、ionofphosphateanditsCEC,inorganicphosphorus,organicmatterandtotalphosphorushaveremarkablenegativecorrelation;betweenthetotalmaximumadsorptionofphosphateanditsorganicmatter,CEC,totalphosphorus,inorganicphosphorus,organicphosphorus,Fe/A-lphosphorusandtotalnitrogenhaveremarkablepositiv
8、ecorrelation;?Asreg
