Vol 15, No 1 (2011) > Articles >

Formation of CaCO3 Particle and Conductivity of Na2CO3 and CaCl2 Solution Under Magnetic Field on Dynamic Fluid System

Nelson Saksono 1 , Setijo Bismo 1 , Roekmijati Widaningroem 1 , Azwar Manaf 2


  1. Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia
  2. Department of Physics, Faculty of Mathematics and Science, University of Indonesia, Depok 16424, Indonesia


Abstract: Hard  water  causes  the  CaCO3  scale  formation  on  the  pipe  walls and  heat  exchanger  equipments  in  industrial  or domestic  water  processes.  A  great  number  of  experimental  researches  on  the  prevention  of the  CaCO3  precipitation process  by  magnetic  field  have  been  carried  out.  In  this  research,  Na2CO3  and  CaCl2  solutions  was  magnetized  in  the circulated  flow  condition  (dynamic  fluid  system).  The  velocity  of  fluid  and  the  circulation  time  was  modified  to examine  its influences  to  the  magnetization  process.  CaCO3  content  was measured  by  titration  method  of  EDTA complexometry.  Conductivity  test  was  conducted  to  find  out  hydrate  ion  bonding.  The  results  showed  that magnetization increased the CaCO3 formation and the optimum process reaches for 10 minutes circulation on 0.554 m/s of flow rate. Magnetic field decreases the conductivities of Na2CO3 and CaCl2  solution, hence reduced the ion hydrate bonding. These results showed that magnetization on Na2CO3 and CaCl2 ionic solution was effective in controlling the CaCO3 formation by increasing CaCO3 precipitation.
Keywords: CaCO3 conductivity, magnetic carbonate solution, precipitation
Published at: Vol 15, No 1 (2011) pages: 89-95

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