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《天津于桥水库沉积物理化特征及磷赋存形态研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(1):168—173JournalofAgro—EnvironmentScience天津于桥水库沉积物理化特征及磷赋存形态研究朱兴旺,刘光逊,梁丽君,马丽丽,王玉秋(南开大学环境科学与工程学院环境污染控制过程与基准教育部重点实验室,天津300071)摘要:以天津于桥水库作为我国北方湖泊的代表,应用淡水沉积物磷形态的标准测试程序(SMT)对于桥水库6个表层沉积物样品的理化特征及磷赋存形态进行分析,并在此基础上探讨了各形态磷之间及各形态磷与沉积物理化特征,如阳离子交换量、有机质总量、颗粒组成、
2、主要金属含量之间的相关性。结果表明,研究区域内总磷含量为354--581mg·kg:~,其中以无机磷(IP)为主;占总磷含量的57.3%一-74.7%;3种主要磷形态含量的大小依次为Ca—P>OP>A1/Fe—P,其中Ca—P是沉积物中磷的主要赋存形态;随着沉积物中有机磷含量的增加,有机质总量与阳离子交换量也逐渐提高,细粉粒(0.01~0.005mm)的含量也有所增加。此外,还对水库调水前后沉积物磷赋存形态的变化进行了研究,发现沉积物在调水期间主要扮演“汇”的角色,其中Fe/A1一P为调水期内变化最为活跃的磷形态。关键词
3、:沉积物;磷赋存形态;理化特征;水库调水中图分类号:X524文献标志码:A文章编号:1672—2043(2010)01—0168—06Physical-ChemicalCharacteristicsandPhosphorusSpeciationintheSedimentsoftheTianjinYuqiaoReserviorZHUXing-wang,LIUGuang-xun,LIANGLi-jun,MALi-li,WANGYu-qiu(KeyLaboratoryofEnvironmentalPollutionContro
4、lProcessandBenchmark(NankaiUniversity),MinistryofEducation,CollegeofEnviron-mentalScienceandEngineering,NankaiUniversity,Tianjin300071,China)Abstract:Thestandardmeasurementandtest(SMT)procedureforfreshwatersedimentswasappliedtotheinvestigationofphosphorousformsin
5、thesurfacesediments(0一-10cm)whichobtainedfromsixvariousregionsinYuqiaoReservoir.Therelationshipbetweendifferentphosphorousforms,aswellasphysical-chemicalpropertiesincludingcationexchangecapacity,organicmattercontent,particlecompositionandcontentofthemainmental,we
6、reanalyzedanddiscussed.Theresultssuggestedthatthetotalphosphorouscontent,inwhichinorganic-Ptakes57.3%一-74.7%.rangedfrom354to581mg。kg~.ThesizeorderofthethreemainformsofphosphorusspeciationwasCa-P>OP>A1/Fe-P,andtheCa-PwasthemajorityofTP.Astheconcentrationsoforganop
7、hosphorusincrease,organicmatter,cationexchangecapacityandclay(0.01一-0.005mm)werealsoontheincrease.ThecomparativestudyonphosphorusformsinsedimentbeforeandafterwatertransferoftheYuqiaoReservoirshowedthatthesedimentsinksphosphorus.andtheFe/A1一Pwasthemostactivephosph
8、orusformsinthetransferperiod.Keywords:sediment;phosphorousforms;physical-chemicalcharacteristics;watertransfer于桥水库是引滦入津工程重要的调蓄水库,也是对比,得出于桥水库水质已处于富营养化向重度营养天津市人民
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