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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