摘要
多钨酸钠是一种无毒、易配制、可循环使用、密度高的新型无机重液。本文利用多钨酸钠重液，用离心机重力分离的方法将青海湖沉积物分成低（≮1.9g/cm^3）、中（1.9～2.8g/cm^3）、高（≥2.8g/cm^3）三个密度组分，平均回收率为96.5％。重力分离后的沉积物测试分析发现，有机质主要分布在富粘土矿物的中密度组，揭示了粘土矿物的表面吸附是青海湖底沉积物有机喷的主要赋存形式。
Sodium polytungstate is a waler-miscible, nontoxic, high-density and inorganic heavy liquid. Sediment san〉 pies from Qinghai Lake were separated into low（≥l. 9 g/cm^3） ,medium（1.9～2.8 g/cm^3） and high-density（≤2.8 g/cm^3） fractions using sodium polytungstate solution flotalion. The overall mass recovery efficiency for the density scparationswas 96. 5%. The test on sediments after gravity separation indicates that organic matter content is closely relevant to clay mineral content, suggesting that clay mineral adsorption is the major mechanism in the preservation of organic matter in sediments from the Qinghai Lake
出处
《矿物岩石地球化学通报》
CAS
CSCD
2008年第1期69-71,共3页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(40472064,40228004)
关键词
重液
多钨酸钠
重力分离
沉积物
青海湖
heavy liquid
Sodium polytungstate
gravity separation
sediments
Qinghai Lake
