摘要
东太平洋的天然锰结核经0.1mol/LKMnO4溶液氧化,与1.0mol/LMgCl2溶液进行离子交换,在密闭高压釜中于180℃水热处理120h后,似水锰矿(buserite)转变成钙锰矿(todorokite).实验结果表明,水热反应能提高锰结核中钙锰矿的结晶度和含量,是实现天然锰结核相转变的关键;利用水热反应可将天然锰结核开发为钙锰矿型分子筛功能性材料.
Manganese nodules recovered from the Eastern Pacific Ocean floor was oxidized by 0.1 mol/L KMnO4, cation exchanged by 1.0 mol/L MgCl2, then autoclaved at 180°C for 120 h. Buserite in the raw material was successfully converted into todorokite. It shows that the hydrothermal treatment on manganese nodules, together with the oxidation and cation exchange, is an effective route for transforming nature buserite into todorokite, and increases the crystallinity and content of todorokite. Manganese nodules is a potential source for octahedral molecular sieve.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第9期1231-1234,共4页
Journal of Zhejiang University：Engineering Science
基金
国家十五大洋专项基金资助项目(DY105 1 04 3
DY105 04 01 10).
关键词
天然锰结核
水热合成
钙锰矿
结晶度
相转变
Hydrothermal synthesis
Ion exchange
Oxidation
Phase transitions
Transmission electron microscopy
X ray diffraction analysis
