https://scholars.lib.ntu.edu.tw/handle/123456789/573025
標題: | Mercury vapor adsorption and sustainable recovery using novel electrothermal swing system with gold-electrodeposited activated carbon fiber cloth | 作者: | Liao H.-Y Pan S.-Y You S.-W Hou C.-H Wang C Deng J.-G SHU-YUAN PAN CHIA-HUNG HOU HSING-CHENG HSI |
關鍵字: | Activated carbon; Clothes; Efficiency; Electric heating; Electrodeposition; Electrodes; Gas adsorption; Gold; Graphite fibers; Mass transfer; Mercury amalgams; Activated carbon fiber cloths; Adsorption capacities; Adsorption efficiency; Intra-particle diffusion controls; Mass transfer modeling; Pseudo-second order model; Regeneration temperature; Thermal and electrical conductivity; Physisorption; activated carbon; gold nanoparticle; mercury; activated carbon; adsorption; concentration (composition); detection method; experimental study; mass transfer; mercury (element); pollutant removal; temperature effect; adsorption; atomic absorption spectrometry; concentration (parameter); controlled study; electric conductivity; electrochemistry; electrodeposition; green chemistry; physical chemistry; platinum electrode; pore volume; room temperature; scanning electron microscopy; surface area; surface property; temperature; vapor; X ray photoemission spectroscopy | 公開日期: | 2021 | 卷: | 410 | 來源出版物: | Journal of Hazardous Materials | 摘要: | A novel electrothermal swing (ETS) system with gold-electrodeposited activated carbon fiber cloth (GE-ACFC) was developed to adsorb and sustainably recover low-concentration Hg0. GE-ACFC with an Au growth time of 1200 s displayed the largest Hg0 adsorption capacity and >90% removal efficiency. The Hg0 adsorption of GE-ACFC was dominated by physisorption via Au amalgamation. In contrast, Hg adsorption of untreated ACFC (RAW-ACFC) was mainly controlled by physisorption and chemisorption related to carbonyl groups. Nevertheless, both ACFCs could reach 100% ETS Hg0 regeneration. The Hg re-adsorption of GE-ACFC was stable, with efficiency >90% at different regeneration temperatures in three-cycle ETS experiments, but the Hg re-adsorption efficiencies of RAW-ACFC greatly decreased to only 60% after 250 ℃ regeneration, due to the formation of electrothermal hot spots in the ACFC. Because the thermal and electrical conductivity of GE-ACFC increased due to Au electrodeposition, the presence of electrothermal hot spots in GE-ACFC-1200s was minor. Simulation results showed that both pseudo-first-order and pseudo-second-order models fitted well to the desorption patterns of the GE-ACFC. Mass transfer model further suggested that intraparticle diffusion control was the rate-limiting step, with diffusion coefficients increased from the first to the third cycle for GE-ACFC. ? 2020 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096872376&doi=10.1016%2fj.jhazmat.2020.124586&partnerID=40&md5=88d53d67091764feb2838f63ab4728fc https://scholars.lib.ntu.edu.tw/handle/123456789/573025 |
ISSN: | 3043894 | DOI: | 10.1016/j.jhazmat.2020.124586 | SDG/關鍵字: | Activated carbon; Clothes; Efficiency; Electric heating; Electrodeposition; Electrodes; Gas adsorption; Gold; Graphite fibers; Mass transfer; Mercury amalgams; Activated carbon fiber cloths; Adsorption capacities; Adsorption efficiency; Intra-particle diffusion controls; Mass transfer modeling; Pseudo-second order model; Regeneration temperature; Thermal and electrical conductivity; Physisorption; activated carbon; gold nanoparticle; mercury; activated carbon; adsorption; concentration (composition); detection method; experimental study; mass transfer; mercury (element); pollutant removal; temperature effect; adsorption; atomic absorption spectrometry; concentration (parameter); controlled study; electric conductivity; electrochemistry; electrodeposition; green chemistry; physical chemistry; platinum electrode; pore volume; room temperature; scanning electron microscopy; surface area; surface property; temperature; vapor; X ray photoemission spectroscopy |
顯示於: | 生物環境系統工程學系 |
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