Lignin – from natural adsorbent to activated carbon: A review

The adsorption of caffeine was evaluated using natural adsorbent chitosan and three derivates of the material. Raw, H2O2 pre-treated, and a chemically altered chitosan were compared to activated carbon. Activated carbon was found to have a high affinity for caffeine (98% removal) while raw chitosan performed poorly with an average adsorption of 15.9%. Batch tests in acidic and basic conditions as well as increasing dosage did not have an effect on the performance. Chemical modifications to chitosan included calcinated mesoporous materials and non-calcinated materials, both of which increased chitosan adsorption of caffeine to 29 and 40%, respectively. Hydrogen peroxide pre-treated chitosan performed best of chitosan-based adsorbents, and reached a 46% removal of caffeine in batch adsorption tests. The majority of the adsorbents had low correlation to the Langmuir, Freundlich, and Redlich–Peterson isotherm models. However, data were sufficient to compare adsorption capacity for caffeine among activated carbon, chitosan, and chitosan derivatives.

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Thermal stability and decomposition of perfluoroalkyl substances on spent granular activated carbon

10.1021/scimeetings.0c06806 ◽

2020 ◽

Author(s):

Feng Xiao ◽

Bin Yao ◽

Pavankumar Challa Sasi ◽

Svetlana Golovko ◽

Dana Soli ◽

...

Keyword(s):

Thermal Stability ◽

Activated Carbon ◽

Granular Activated Carbon ◽

Perfluoroalkyl Substances

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Modification of activated carbon fiber pore structure by coke deposition

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2001335 ◽

2001 ◽

Vol 11 (PR3) ◽

pp. Pr3-279-Pr3-286

Author(s):

X. Dabou ◽

P. Samaras ◽

G. P. Sakellaropoulos

Keyword(s):

Activated Carbon ◽

Carbon Fiber ◽

Pore Structure ◽

Activated Carbon Fiber ◽

Coke Deposition

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Enhancing the power generation of Rhodopseudomonas palustris-based MFC

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209444 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 1261-1268

Author(s):

Shu Otani ◽

Dang-Trang Nguyen ◽

Kozo Taguchi

Keyword(s):

Activated Carbon ◽

Rhodopseudomonas Palustris ◽

Ozone Treatment ◽

Maximum Power Density ◽

On Demand ◽

Long Time ◽

Dry Conditions ◽

Carbon Sheet ◽

Uv Ozone

In this study, a portable and disposable paper-based microbial fuel cell (MFC) was fabricated. The MFC was powered by Rhodopseudomonas palustris bacteria (R. palustris). An activated carbon sheet-based anode pre-loaded organic matter (starch) and R. palustris was used. By using starch in the anode, R. palustris-loaded on the anode could be preserved for a long time in dry conditions. The MFC could generate electricity on-demand activated by adding water to the anode. The activated carbon sheet anode was treated by UV-ozone treatment to remove impurities and to improve its hydrophilicity before being loaded with R. palustris. The developed MFC could generate the maximum power density of 0.9 μW/cm2 and could be preserved for long-term usage with little performance degradation (10% after four weeks).

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