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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
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