海洋粘土沉积物的组成及其增白试验  

The Composition of the Sea Clay and Its Bleaching Test

作　　者：田春燕[1] 张培萍[1] 马丽艳[1] 石学法[2] 吕华华[2] 于德利[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130026 [2]海洋沉积与环境地质国家海洋局重点实验室

出　　处：《吉林大学学报（地球科学版）》2006年第1期142-147,共6页Journal of Jilin University：Earth Science Edition

基　　金：中国大洋协会"十五"规划项目(DY105-1-3);吉林大学研究生创新基金项目(601044)

摘　　要：为了海洋粘土的开发应用,利用FTIR和XRD衍射对其进行了矿物成分分析。结果表明,海洋粘土样品中粘土矿物含量较高,其主要矿物组成为伊/蒙混层和伊利石并含有少量其它矿物,同时证实样品中有磁铁矿和赤铁矿存在。粘土沉积物的化学成分分析显示,粘土中Fe2O3质量分数较高,约为7%。采用酸溶氢气还原法对东太平洋的粘土样品进行了化学增白试验,并探讨了酸种类及其浓度、药剂用量、反应时间、煅烧温度等因素对除铁增白效果的影响,优选出最佳除铁增白方案,使海洋粘土的白度由原来的23.8%提高到73.1%。另外,对增白前后样品的粒度、比表面积和分散性的测试表明,在增白的同时样品的活性也得到了提高。In order to explore and utilize the sea clays, the minerals of the sea clay samples were determined by using infrared spectrum instrument and X-ray diffraction instrument. It shows that the content of the clay mineral in the sea clays is very high, in which I/S inter-layer and illite are the dominant mineral composition. Minor of other minerals, including magnetite and hematite, are also present. Chemical composition analysis reveals that the content of Fe2 O3 in the sample reaches about 7%. The East Pacific clay samples were bleached by introducing the reducing method of acid dissolving hydrogen. The effect factors on the iron removal and bleaching were discussed, such as acid kind and its concentration, medicament dosage, reaction time, calcinations temperature, and etc. The best bleaching scheme was established, through which the whiteness of the sea clay increases from 23.8% to 73.1%. Besides, the granularity, special surface area and dispersing ability of the samples before and after bleaching were tested, and it reveals that their activity has also been improved along with the increasing in whiteness.

关 键 词：海洋粘土 矿物组成 增白 酸溶氢气法 

分 类 号：P736.21[天文地球—海洋地质]