Activated carbon: classifications, properties and - download pdf or read online

By James F. Kwiatkowski

ISBN-10: 1620816660

ISBN-13: 9781620816660

Provides topical study within the examine of activated carbon, along with themes similar to the outside chemistry of activated carbons and as catalyst helps; thermal processing of activated carbons from agro-industrial wastes; activated carbon as a steel oxide aid; and, extra.

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Additional info for Activated carbon: classifications, properties and applications

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Some of the PAC applications in the removal of contaminants Removal agent/process Treated phase PAC+Microfiltration Aqueous PAC PAC PAC PAC Aqueous Aqueous Aqueous Aqueous Cetyl trimethyl ammonium bromide (CTAB), Linear alkyl benzene sulfonate (LABS) Geosmin** Turquoise Blue-G Metsulfuron-methyl (a herbicide) Malachite green PAC, s-PAC* Aqueous Geosmin** PAC+Ozonation Aqueous A surfactant: sodium dodecylbenzenesulphonate PAC+Submerged anaerobic membrane bioreactor Aqueous Dissolved organic carbon (DOC) 89% Pollutant(s) Removal capability Ref.

112] have worked on the removal of chromium ions by adsorption on GAC in aqueous solution. Chromium is a dangerous metal especially in Cr (VI) form. Trivalent chromium has much less toxicity. Di Natale et al. [112] have studied the chromium adsorption isotherms in aqueous solutions. They have shown that chromium adsorption capacity on GAC depends on salinity and pH of solution. Its maximum amount is around 7 mg g-1 at low salinity and neutral pH. The results show that at pH values lower than 3 the mechanism of chromium removal is first its reduction to Cr (III) by carbon surface groups and then the adsorption of Cr (III).

G◦ is calculated by Eq. 25. 25) ΔG◦<0 indicates the spontaneous nature of the adsorption while ΔG◦>0 shows that the adsorption is not spontaneous (desorption is spontaneous) and the conditions must be changed to make feasible the adsorption. ΔG◦=0 shows the adsorption in equilibrium. The negative and positive values of ΔH◦ imply exothermic and endothermic adsorption, respectively. ΔS◦ values show the change in randomness in the adsorption interface which increases with positive values of ΔS◦ and vice versa.

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Activated carbon: classifications, properties and applications by James F. Kwiatkowski

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