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논문 기본 정보

자료유형
학술저널
저자정보
Gonsalvesh, Lenia (Institute of Organic Chemistry, Bulgarian Academy of Sciences) Gryglewicz, Grazyna (Department of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wroclaw University of Technology) Carleer, Robert (Research group of Applied and Analytical Chemistry, Hasselt University) Yperman, Jan (Research group of Applied and Analytical Chemistry, Hasselt University)
저널정보
테크노프레스 Advances in environmental research Advances in environmental research 제6권 제2호
발행연도
2017.1
수록면
95 - 111 (17page)

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The valorization of swine manure samples, i.e., de-watered cake (SMc) and solid digestate (SMd), in products with beneficial value, i.e., low cost activated carbons (ACs), is studied. For this purpose slow pyrolysis and steam activation at three different duration times are applied. Additionally, the obtained ACs are characterized and tested towards removal of Cr(VI) from aqueous solutions. It is revealed that BET surface area varies in the range of $236-267m^2/g$ for ACs prepared from SMc sample and in the range of $411-432m^2/g$ for ACs prepared from SMd sample. Despite the low determined surface area of prepared ACs, a high total Cr removal capacity is observed occurring through a "coupled adsorption-reduction" mechanism. Higher Cr(VI) removal capacity is demonstrated for ACs having higher surface area ($q_m$ is 140.9 mg/g according Langmuir modelling). Cr(VI) removal is found to be pH dependent with a maximum at pH 1. However at that pH significant amounts of Cr remain in the solution as Cr(III). At pH 2 lower amount of Cr(VI) is removed compensated by a higher removal of Cr(III) resulting in a higher amount of adsorbed $Cr_{tot}$. Therefore adsorption at pH 2 is found to be appropriate. The removal capacity of the studied ACs towards Cr(VI) is almost independent of activation time.

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