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1、第26卷第3期环境科学Vol.26,No.32005年5月May,2005ENVIRONMENTALSCIENCE长江中下游浅水湖泊沉积物对磷的吸附特征11*2113王圣瑞,金相灿,赵海超,庞燕,周小宁,楚建周(11中国环境科学研究院湖泊生态环境研究中心,北京100012;21内蒙古农业大学农学院,呼和浩特010018;31河北农业大学资源与环境学院,保定071001)摘要:研究了长江中下游浅水湖泊11个沉积物对磷的吸附等温线及其吸附动力学,并分析了沉积物理化特征对磷吸附特征的影响,研究发现:¹沉积物对磷酸盐的吸附主要在前10h内完成,在015h内吸附反应十分
2、迅速,并逐渐达到吸附平衡;º沉积物本底吸附态磷与其有机质、CEC、总磷、无机磷、有机磷、Fe/A-l磷和总氮显著正相关;对磷酸盐的最大吸附量与其CEC和无机磷、有机质和总磷呈显著负相关;而总最大吸附磷量与其有机质、CEC、总磷、无机磷、有机磷、Fe/A-l磷和总氮含量呈显著正相关;»就目前长江中下游浅水湖泊的水质而言,其沉积物存在解析;沉积物对磷酸盐的吸附-解吸平衡浓度与其有机质,CEC,总氮,总磷以及各形态磷含量均有显著的正相关关系.本研究条件下,即使是污染较为严重的湖泊,其沉积物也具有向上覆水体释磷酸盐的趋势.关键词:沉积物;磷酸盐;吸附速率;吸附量;沉积
3、物组成;长江中下游;浅水湖泊中图分类号:X143文献标识码:A文章编号: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
