| Abstract |
| The experimental procedure for the measurement of the point of zero charge of particulate matters in aquatic environment by acid titration was investigated using titanium oxide as the target material. The measurement of the pzc`s of inorganic oxide, hydroxide, and silicate particles was shown to be possible by potentiometric titration observing the pH variation with the addition of acid solution. The pzc of TiO2 was determined to be around pH 4.1 and Fe3+ ion was verified to be its cationic potential determining ion. When ferric ion was co-existed in solution, the pzc of TiO2 was observed to be decreased by around 0.3 unit in pH from its original value. Considering the feasibility of the potentiometric titration method for the measurement of the pzc value of particles, it was expected that its applicability will be very wide and versatile for the systematic control and treatment of the particulate matters in water. |
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| Key Words |
| Point of zero charge, Particles, Potentiometric titration, Titanium oxide, Potential determining ion |
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