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Beni-Suef University Journal of Basic and Applied Sciences

Table 2 Kinetic parameter for hexavalent chromium bioreduction by Tamarindus indica methanol leaves extract at pH 7

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

0.985

15.04

6.4 × 10−2

2.677

Pseudo-first order

0.988

1.070

6.5 × 10−1

860.8

Second order

0.939

3269.34

2.12 × 10−4

120.5

Pseudo-second order

0.742

450.1

1.54 × 10−3

19.72

  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
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