Original scientific paper
https://doi.org/10.15255/CABEQ.2024.2323
Pyrolysis of Golden Snail Shells (Pomacea canaliculata L.) for Phosphorus Removal from Aqueous Solutions
M. T. Vu
; Hanoi University of Natural Resources and Environment, Ministry of Natural Resources and Environment, 41 Phu Dien, Bac Tu Liem, Ha Noi, 100000, Vietnam
L.-T.-T.-T. Hoang
; b)Laboratory of Advanced Materials Chemistry, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam; c)Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
M.-T. Dao
; Department of Environmental Engineering, Thu Dau Mot University, Binh Duong, 820000, Vietnam
Abstract
Biochar derived from abundant waste biomass has emerged as an eco-friendly alternative to conventional adsorbents. In this study, biochar produced from golden snail shells through a simple pyrolysis process was applied for phosphorus adsorption. The effects of pyrolysis temperature and time on adsorption capacity were investigated. The biochar pyrolyzed at 800 °C for 90 min (B800) exhibited the best adsorption performance. Optimal adsorption conditions were determined to be a pH of 4.0 and an adsorbent dose of 1.6 g L–1. The adsorption of phosphorus onto B800 could be well described by the Langmuir model and the pseudo-first-order model, achieving a maximum adsorption capacity of 63.5 mg g–1 and a rate constant of 0.029 min–1. This study highlights the potential of biochar derived from agricultural waste as a highly efficient and environmentally friendly adsorbent for phosphorus removal. Furthermore, the adsorption mechanism, driven by the electrostatic interaction occurring prior to Ca-P precipitation, was elucidated. The phosphorus adsorbed onto biochar can potentially be recycled as a soil fertilizer.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Keywords
biochar; golden snail; phosphorus removal; pyrolysis
Hrčak ID:
327086
URI
Publication date:
20.1.2025.
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