adsorption of chromium on activated carbon

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Adsorption of chromium by activated carbon from aqueous

The adsorption isotherms have been determined after modifying the activated carbon surfaces by oxidation with nitric acid ammonium persulphate hydrogen peroxide and oxygen gas at 350 C and after degassing at different temperatures. The adsorption of Cr III ions increases on oxidation and decreases on degassing.

Adsorption of chromium by activated carbon from aqueous

Adsorption isotherms of Cr III ions from aqueous solutions of chromium chloride in the concentration range 20 to 1000 mg/l on two samples of granulated activated carbons GACE and GACS and two samples of activated carbon fibers ACF307 and ACF310 are shown in Fig. 1. All the isotherms have been determined without addition of any buffer

Adsorption of Chromium VI on Activated Carbon Prepared by

Adsorption of Chromium VI on Activated Carbon Prepared by Acid Activation of Date Stones . Hedi Ben Amor1 Mohamed Ismail2. 1Research Unit quotEnergy and Environmentquot National School of Engineers University Gabs Omar Ibn Elkhatab Avenue 6029 Gabs Tunisia 2Higher Institute of Applied Sciences and Technology University Gabs Omar. Ibn

Full article: Adsorption of hexavalent chromium from aqueous

Adsorption of hexavalent chromium from aqueous solution by Leucaena leucocephala seed pod activated carbon: equilibrium kinetic and thermodynamic studies Adeyinka S. Yusuff Department of Chemical and Petroleum Engineering College of Engineering Afe Babalola University AdoEkiti Nigeria Correspondence yusuffas abuad.edu.ng

Enhanced adsorption of chromium onto activated carbon by

FeCl3 AlCl3 and MnCl2 had successfully improved Cr VI adsorption and activated carbon with FeCl3 as assisted activation agent exhibited the best uptake capacity. To study the transformation of Cr VI in adsorption process total chromium in the aqueous solution was also recorded.

Adsorption of hexavalent chromium by activated carbon

We can observe from Figure 8 that decreasing the pH from 6 to 2 leads to an increase in adsorption from 27.2 to 62.08 mg/g so we can conclude that pH 2 is the best optimum pH value for the highest removal efficiency or adsorption of chromium ions on activated carbon although previous works by other scientists such as those of Garg et al

Adsorption of chromium on activated carbon

At a pH of 4 or less all remaining chromium was in the Cr III form and its concentration increased with decreasing pH. 512 Adsorption of Cr III by activated carbon. Fig. 53 shows the results of experiments where a 10 M solution of Cr III was reacted in the presence and absence of activated carbon.

Adsorption of hexavalent chromium onto activated carbon

The adsorptive removal of Cr VI was studied using activated carbon derived from Leucaena leucocephala ACLL . The physicochemical properties of ACLL were determined using proximate analysis and N2 BET surface area analysis. The N2 BET surface area of ACLL was determined to be 1131 m2 g1. The point of zero charge pHpzc of 5.42 indi ed that ACLL surface was positively charged for pH

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