Fig. 5From: Kinetics and thermodynamics of Cr (VI) reduction by Tamarindus indica methanol leaves extract under optimized reaction conditionsEffect of reaction time on hexavalent chromium reduction by Tamarindus indica methanol leaves extract. (Extract concentration = 1 mg/ml, chromium concentration = 10 mg/L, temperature = 27 °C, pH = 2.0, 7.0 and 9.0)Back to article page