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Table 3 The average velocity of aggregate sedimentation in the Cr2O3 suspension formed in the absence and presence of ionic polyamino acids (at 15 h)

From: Application of the zeta potential measurements to explanation of colloidal Cr2O3 stability mechanism in the presence of the ionic polyamino acids

System V (μm/min)
pH 4.0 7.6 10
Cr2O3–NaCl 0.439 0.325 41.52
Cr2O3–ASP 6,800 1.844 1.047 0.892
Cr2O3–ASP 27,000 0.653 0.906 0.696
Cr2O3–LYS 4,900 1.264 1.394 42.91
Cr2O3–LYS 33,000 1.407 1.971 2.268