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Adsorption Studies of Cr(VI)on Activated Carbon from Sunflower Stalk

Shun Xin

Abstract

As the sunflower stalk as raw material made of sunflower stalk activated carbon modified by concentrated phosphoric acid,The adsorption effect of Cr(VI)solution by Sunflower stalk active carbon Was studied under different pH,Discussed the kinetic characteristics of the adsorption process.The results show that:Cr(Ⅵ)solution adjusting the solution pH to2.0,have the optimal removal efficiency;increasing temperature favors the adsorption.Straw of activated carbon on the adsorption process of Cr(Ⅵ)more in line with the Dubinin-Radushkevick adsorption equation.

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Key concepts: Stalk, Adsorption, Sunflower, Activated carbon, Phosphoric acid, Chemistry, Carbon fibers, Straw