摘要
利用扫描电子显微镜(SEM)和X-射线衍射(XRD)技术对加入Mg2+后生成的CaCO3形貌和晶型进行了表征,探讨了Mg2+对CaCO3结晶过程和晶型的影响。结果表明,加入Mg2+后生成的CaCO3晶型主要为文石和方解石,且文石的含量高于方解石。随着加入Mg2+浓度的增加,文石含量逐渐增加,文石的针状晶须趋于细化。当Mg2+浓度高于0.50 mmol.L-1时对方解石有很强的抑制作用,溶液中Mg2+的存在有利于CaCO3晶型由方解石向文石转化。
Appearance and crystal form of calcium carbonate, which formed with the presence of magnesium ion, were characterized by SEM and XRD. The effect of magnesium ion on crystallization and crystal form of calcium carbonate were studied. The results showed that the crystal form of calcium carbonate was mainly calcite and aragonite, and the content of aragonite was higher, after adding magnesium ion to the blank solution. With the increase of magnesium ion concentration, the content of aragonite increased and the crystal particals were thining. There was a strong inhibitory effect on calcite when the concentration of magnesium ion was more than 0.50 retool· L^-1. The calcite can be transformed into aragonite in the presence of magnesium ion in solution.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第10期60-62,共3页
Technology of Water Treatment
基金
河北省自然科学基金(B2011302001
B2010001558)
关键词
碳酸钙
晶型
镁离子
形貌
calcium carbonate
crystal form
magnesium ion
appearance
