Bulletin of the National Research Centre

Table 3 Rate constants and R² at different agitation rates

From: Effects of alkali solution on the dissolution kinetics and optimization processes of iron from Akwuke ore

Agitation rates (rpm)	Surface chemical		Diffusion controlled
Agitation rates (rpm)	Ks (min¯¹)	R²	Kd (min¯¹)	R²
90	0.0025	0.918	0.0021	0.995
190	0.0023	0.981	0.0022	0.998
290	0.0022	0.974	0.0020	0.987
390	0.0018	0.973	0.0017	0.978
490	0.0019	0.970	0.0016	0.976

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