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Table 1 Kinetic parameter for hexavalent chromium bioreduction by Tamarindus indica methanol leaves extract at pH 2

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

0.927

11.36

6.1 × 10−2

4.985

Pseudo-first order

0.649

45.59

1.5 × 10−2

6.781

Second order

0.645

42,262.2

1.64 × 10−5

714.3

Pseudo-second order

0.997

10.20

6.2 × 10−2

11.16

  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