中国东部河流沉积物中重金属含量与沉积物主要性质的关系  

RELATION OF GEOCHEMICAL AND SURFACE PROPERTIES TO HEAVY METAL CONCENTRATIONS OF SEDIMENTS FROM EASTERN CHINESE RIVERS

作　　者：陈静生[1] 王飞越[1] 宋吉杰[1] 陈江麟[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《环境化学》1996年第1期8-14,共7页Environmental Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：采集了我国东部12条大、中河流的26个相对清洁的表层沉积物样品,测定了沉积物中Cu,Zn,Ph,Cd和Co的含量以及沉积物的主要地球化学性质(粒径分布、反应性铁氧化物、无定型铁氧化物、总铁、隐晶型锰氧化物、总锰、铝氧化物、钛氧化物、有机碳和粘土矿物含量等)和表面性质(比表面和表面位密度),以非参数相关分析和偏相关分析研究了沉积物中重金属含量与沉积物主要性质之间的关系,结果表明,在我国东部,这些相对清洁的河流沉积物中,铝氧化物的含量是影响其中重金属含量的主要因素,偏相关分析结果同时也揭示了沉积物中的铁、锰氧化物和有机质主要存在于粘土矿物的表面,因而它们与沉积物中重金属含量的相关性受粘土矿物含量的显著影响.A total of 26 geographically and hydrologically diverse and relatively unpolluted sediment samples was collected from 12 rivers in the eastern China. The geochemical properties(i. e. ,grain size distribution,contents of reactive FeOx, amorphous FeOx,cryp-tocrystalline MnOx,total Fe,total Mn, AlOx, TiCX and TOC)and surface properties (surface area and surface site density)of the samples,as well as the concentrations of Cu,Zn, Pb,Cd and Co in the samples,were determined. Basing on the data set,the relation of the sediment properties to heavy metal concentrations were evaluated with Kendall's rank and partial rank correlation analysis. The results showed that the heavy metal concentrations in these unpolluted sediments were strongly correlated with A1OX content.

关 键 词：沉积物 粘土矿物 河流 重有色金属 性质 相关性 

分 类 号：X522.02[环境科学与工程—环境工程]