Fig. 3From: Kinetics and thermodynamics of Cr (VI) reduction by Tamarindus indica methanol leaves extract under optimized reaction conditionsEffect of initial chromium concentration on hexavalent chromium reduction by Tamarindus indica methanol leaves extract. (Extract concentration = 1 mg/ml, time = 30 min, temperature = 27 °C, pH = 2.0, 7.0 and 9.0)Back to article page