Mise Shashikant R, Rajamanya V S
Department of Civil Engineering, P.D.A. College of Engineering, Gulbarga.
Indian J Environ Health. 2003 Jan;45(1):49-58.
The present work deals with the adsorption studies of chromium (VI) on activated carbon derived from Sorghum vulgare (dried stem of Jowar). The activated carbons were prepared by physical and chemical activation using H2SO4, H3PO4 activating agents of different imprignation Ratio (I.R.). The effect of adsorption of Cr (VI) on pH, particle size concentration, contact time and dosage have been studied. Removal of chromium (VI) attained in equilibrium maxium of 50 minutes and slightly decreases with increasing I.R. Adsorption obeys first order rate equation and Webber and Morris equation for pore diffusion. Adsorption increases with decrease in pH, is maximum at pH 2. Increase in imprignation ratio also increases surface area of Sorghum vulgare carbons.
本研究涉及高粱（乔瓦干茎）衍生的活性炭对六价铬的吸附研究。通过使用不同浸渍比（I.R.）的硫酸、磷酸活化剂进行物理和化学活化制备活性炭。研究了六价铬吸附对pH值、粒径浓度、接触时间和用量的影响。六价铬的去除在50分钟时达到平衡最大值，并随着浸渍比的增加略有下降。吸附遵循一级速率方程以及用于孔扩散的韦伯和莫里斯方程。吸附随着pH值的降低而增加，在pH 2时达到最大值。浸渍比的增加也增加了高粱活性炭的表面积。
