水处理技术中CaCO_3沉淀的磁处理作用研究

The Effect of Magnetic Fields on Calcium Carbonate Precipitation

Ca Cl2 、Na2 CO3和 Ca SO4溶液放在静态磁场中磁处理后 ,将 Ca Cl2 和 Ca SO4溶液分别与Na2 CO3溶液混合 ,之后与没有经过磁处理的溶液进行比较 ,结果表明磁场通过排除 Ca CO3晶体的集结与接触 ,从而影响 Ca CO3沉淀的形成 .磁处理的作用至少可持续 60 h,并且磁场对 Na2 CO3溶液的影响比对 Ca Cl2 溶液的影响大 .

Static test solutions of calcium chloride,calcium sulphate and sodium carbonate were placed in a magnetic field.After magnetic treatment the solutions CaCl 2/Na 2CO 3 and CaSO 4/Na 2CO 3 were mixed and changes in precipitation recorded and compared with non magnetized solutions.The results of this study support earlier work which indicates that magnetic fields may influence the formation of CaCO 3 by the suppression of nucleation and acceleration in crystal growth.The “magnetic effect” is maintained for at least 60hs after exposure,and magnetic exposure exerts a greater effect on Na 2CO 3 than on CaCl 2.