Adsorption of Pb(ll) on Activated Carbon Treated by Nitric Acid

Xiao Yan Tan; Fang Zhao; Rui Zhi Wen; Yu Dai

doi:10.4028/www.scientific.net/AMR.550-553.2190

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553Adsorption of Pb(ll) on Activated Carbon Treated...

Adsorption of Pb(ll) on Activated Carbon Treated by Nitric Acid

Abstract:

Commercially available coal-based activated carbon was treated with different concentration of nitric acid. The resultant samples were used to adsorb lead from aqueous solution. N2 adsorption, Boehm titration, point of zero charge (pHPZC) and X-ray photoelectron spectroscopy (XPS) were used to characterize the samples. Acidic pH is favorable for Pb(Ⅱ) adsorption. The acidic groups increase significantly with the increment of the concentration of nitric acid during the treatment. The carboxylic groups of surface carbon play an important role in the adsorption process.