Publications by authors named "Changgil Son"
Environ Pollut
November 2024
Article Synopsis
- This study investigated how post-calcination affects the ability of Mg/Al layered double hydroxide-decorated spent coffee ground biochars (LDH@SCGB) to adsorb arsenic (As) and antimony (Sb) from water.
- Post-calcination improved charge properties and active sites in the biochars, leading to increased adsorption capacities for As and Sb compared to regular spent coffee ground biochars (SCGB) and LDH@SCGB.
- The findings suggest that post-calcination enhances selectivity and reusability for As and Sb removal, making PLDH@SCGB an effective option for water treatment applications.
J Hazard Mater
January 2024
Article Synopsis
- Biochars from food and agricultural waste can effectively remove heavy metal ions from wastewater, but predicting their adsorption capacity is complicated due to their varying characteristics and the different experimental conditions used.*
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- An advanced model called FT-transformer was developed using machine learning, achieving a high accuracy in predicting adsorption capacity, identifying key factors like adsorption conditions as the most influential for performance.*
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- The study suggests optimal conditions for using biochars, particularly those made from banana peels, and highlights important environmental implications of using biochar as a sustainable solution for heavy metal removal.*
Article Synopsis
- * LDH@CWGB showed significantly higher adsorption capacities for PO (6.98 mgP/g) and NO (2.82 mgN/g) compared to regular coffee ground waste biochars, which improved adsorption was attributed to the addition of Mg/Al oxides and Cl.
- * When tested on garden cress seeds, PO- and NO-loaded LDH@CWGB resulted
Environ Pollut
November 2022
Article Synopsis
- The study investigates the ability of spent coffee ground biochar (SCGB) and bismuth-impregnated spent coffee ground biochar (Bi@SCGB) to adsorb radioactive iodine, which can adversely impact human health, particularly the thyroid.
- Bi@SCGB demonstrates a significantly higher adsorption capacity for radioactive iodine (253.71 μg/g) compared to SCGB (23.32 μg/g), with the adsorption influenced by pH levels and electrostatic interactions.
- The research reveals that chemisorption plays a vital role in the process, with SCGB adsorption occurring exothermically and Bi@SCGB showing endothermic behavior; the mechanisms shift from electrostatic attraction to surface precipitation upon
Article Synopsis
- The study investigates the adsorption effectiveness of radioactive barium, cobalt, and strontium ions using two types of spent coffee waste biochars: pristine (SCWB-P) and chemically activated with NaOH (SCWB-A), finding SCWB-A to be significantly more efficient.
- Results show that SCWB-A achieved removal efficiencies ranging from 76.6-97.3%, compared to 45.6-75.2% for SCWB-P, with the adsorption order being Ba(II) > Sr(II) > Co(II), influenced by the presence of oxygen-containing functional groups.
- The adsorption mechanisms shifted from physisorption in SCWB-P to chemisorption in SCWB-A due to alkaline treatment
