Journal
ENVIRONMENTAL RESEARCH
Volume 236, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2023.116742
Keywords
Microporous carbon; Micro-mesoporous carbon; Iron oxide dispersion; Phase transformation; As(V) adsorption performance
Ask authors/readers for more resources
This study investigates the impact of microporous and micro-mesoporous carbon supports on the dispersion, phase transformation, and arsenic(V) removal efficiency of iron oxides. The results show that carbon-supported iron oxide sorbents exhibit superior arsenic(V) uptake capacity compared to unsupported Fe2O3, attributed to reduced iron oxide crystallite sizes and arsenic(V) adsorption on carbon supports. The study provides insights for designing more efficient adsorbents for arsenic(V) removal from contaminated water sources.
This study investigates the impact of microporous (SP-C) and micro-mesoporous carbon (DP-C) supports on the dispersion and phase transformation of iron oxides and their arsenic (V) removal efficiency. The research demonstrates that carbon-supported iron oxide sorbents exhibit superior As(V) uptake capacity compared to unsupported Fe2O3, attributed to reduced iron oxide crystallite sizes and As(V) adsorption on carbon supports. Maximum As(V) uptake capacities of 23.8 mg/g and 18.9 mg/g were achieved for Fe/SP-C and Fe/DP-C at 30 wt % and 50 wt% iron loading, respectively. The study reveals a nonlinear relationship between As(V) sorption capacity and iron oxide crystallite size after excluding As(V) adsorption capacity on carbon supports, suggesting the iron oxide phase (Fe3O4) plays a role in determining adsorption capacity. Iron oxide-loaded DP-C sorbents exhibit faster adsorption rates at low As(V) concentrations (5 mg/L) than SP-C sorbents due to their bimodal pore structure. Adsorption behavior varies at higher As(V) concentrations (45 mg/L), with Fe/DP-C reaching maximum capacity more slowly due to limited available adsorptive sites. All adsorbents maintained near complete As(V) removal efficiency over five cycles. The findings provide insights for designing more efficient adsorbents for As(V) removal from contaminated water sources.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available