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Table 3 Kinetic parameter for hexavalent chromium bioreduction by Tamarindus indica methanol leaves extract at pH 9

From: Kinetics and thermodynamics of Cr (VI) reduction by Tamarindus indica methanol leaves extract under optimized reaction conditions

Kinetic model Correlation (R2) T1/2 (min) K qe (mg/L)
First order 0.572 27.61 2.5 × 10−2 1.506
Pseudo-first order 0.758 3.300 2.1 × 10−1 2,179,716.4
Second order 0.426 184.3 3.76 × 10−3 8.937
Pseudo-second order 0.167 152.3 4.55 × 10−3 3.680
  1. The correlation coefficient value in bold indicated the highest correlation value and the most predominant order of the reaction
  2. R2 = Correlation coefficient, T1/2 = reaction half-life, K = rate constant in different units (first and pseudo-first order in min−1 and second and pseudo-second order in mg/L−1 min−1), qe = equilibrium concentration