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- W2911421457 abstract "Abstract Compared to land, the ocean is much richer in biomass resources. As an attempt to actively explore the utilization of these vast marine biomass resources, in this study, novel activated carbons were prepared from two representative seaweed species (sargassum and enteromorpha), and their efficiencies and mechanisms for Hg0 removal were evaluated in a fixed bed reactor. The effects of modification methods, modification temperatures and reaction temperatures on Hg0 removal were also studied. The experimental data were also tested with different adsorption kinetic models for the best fits, and standard thermodynamic parameters evaluated in order to elucidate Hg0 adsorption mechanisms. The results appear to reveal that the performances of seaweed biomass-based activated carbons (denoted SAC and EAC, respectively) for Hg0 removal, are by far more superior to those of seaweed biomass-based the same pyrolysis chars. The best activation temperature for both samples was found to be 800 °C (and hence denoted SAC-800 and EAC-800); and the Hg0 removal efficiency of both samples also increased with increasing reaction temperature. The kinetic results show that the Hg0 removal is controlled by the external mass transfer at 80 °C and controlled by the chemisorption at 120 °C and 160 °C. It was determined that the Hg0 process was a combination of physisorption and chemisorption; with the excellent physical properties (specific surface area and pore structure), and the surface active sites (C-Cl groups and oxygen species) responsible for the physisorption and chemisorption, respectively." @default.
- W2911421457 created "2019-02-21" @default.
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- W2911421457 date "2019-06-01" @default.
- W2911421457 modified "2023-10-17" @default.
- W2911421457 title "Removal of gaseous Hg0 using novel seaweed biomass-based activated carbon" @default.
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- W2911421457 doi "https://doi.org/10.1016/j.cej.2019.02.025" @default.
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