磁场对原位沉淀碳酸钙的一些影响。

Some magnetic field effects on in situ precipitated calcium carbonate.

作者信息

Chibowski E, Holysz L, Szcześ A, Chibowski M

机构信息

Department of Physical Chemistry-Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland.

出版信息

Water Sci Technol. 2004;49(2):169-76.

PMID:14982178

Abstract

Magnetic field (MF) (B = 0.4 T) effects were studied on CaCO3 precipitated from Na2CO3 and CaCl2 solutions, which at 30 degrees C were exposed for 30 min to the field. One of the impurity ions Mg2+, Zn2+, Fe2+, SO4(2-), HPO4(2-) at 10(-5) mol l(-1) concentration was also added to CaCl2 or Na2CO3, respectively. The changes of zeta potential, pH and light absorbance (at lambda = 543.2 nm) of the slurry after CaCO3 precipitation were measured on the time. In some experiments changes in the deposited amounts of CaCO3 due to MF treatment were determined on glass plates. MF affected all the parameters measured and the effects depended on the kind of impurity ion present.

摘要

研究了磁场（MF）（B = 0.4 T）对从碳酸钠和氯化钙溶液中沉淀出的碳酸钙的影响，这些溶液在30℃下暴露于磁场30分钟。还分别向氯化钙或碳酸钠中添加了浓度为10⁻⁵ mol l⁻¹ 的杂质离子Mg²⁺、Zn²⁺、Fe²⁺、SO₄²⁻、HPO₄²⁻ 中的一种。在碳酸钙沉淀后，随时间测量了浆料的zeta电位、pH值和吸光度（在λ = 543.2 nm处）。在一些实验中，通过MF处理确定了玻璃板上碳酸钙沉积量的变化。MF影响了所有测量参数，且影响取决于存在的杂质离子种类。