海洋沉积物重金属研究中的晶粒度与粒度效应  

Effect of grain-size and crystalline grain-size in study on heavy metal from marine sediment

作　　者：杜俊民[1] 朱赖民[1] 张远辉[1] 

机构地区：[1]国家海洋局第三海洋研究所,福建厦门361005

出　　处：《台湾海峡》2002年第3期317-321,共5页Journal of Oceanography In Taiwan Strait

基　　金：中央公益服务型科研院所所长基金资助项目 ;国家海洋局青年海洋科学基金重点资助项目 (9940 1) ;国家海洋局青年海洋科学基金资助项目 (985 0 4)

摘　　要：本文通过理论估算及实验数据验证 ,发现 6/a(a为晶粒粒径 )可以很好地表示晶粒的比表面积 .结合吸附理论模式讨论发现参考元素Al、Li等的粒度效应和重金属的粒度效应有着本质上的区别 ;海洋自生矿物必须考虑到晶粒度效应 ,在陆源碎屑对重金属吸附的粒度效应校正中粒度可代替晶粒度 ;重金属含量随粒度变化的曲线为双曲线关系 ,在实际工作中应该重点分析粒度 <3 μm的颗粒 .By theoretical calculating and experimental data testing, it is discovered that 6/a(a is crystalline grain-size)can indicate the specific surface area of crystalline. Combining with the adsorption theory model, it is found that the effect of grain-size shows an essential distinction between reference elements Al, Li and heavy metals. The crystalline grain-size must be considered in marine authigenic mineral, and the crystalline grain-size can be replaced by grain-size in discussing the adsorption of terrigenous detritus to heavy metals. The change of heavy metal content with crystalline grain-size shows a double-curve relation, and the crystalline grain-size a<3μm must be emphatically considered.

关 键 词：海洋沉积物 重金属 晶粒度 粒度效应 铝 锂 比表面积 

分 类 号：P736.21[天文地球—海洋地质]