Fig. 2From: Kinetics and thermodynamics of Cr (VI) reduction by Tamarindus indica methanol leaves extract under optimized reaction conditionsEffect of initial extract concentration on hexavalent chromium reduction by Tamarindus indica methanol leaves extract. (Chromium concentration = 10 mg/L, temperature = 27 °C, time = 30 min, pH = 2.0, 7.0 and 9.0)Back to article page