TY - JOUR
T1 - Targeted Selenite Adsorption Using Defective Fe-BTC
T2 - Effective in Acidic and Alkaline Conditions
AU - Byun, Asong
AU - Lee, Byeoksong
AU - Jeong, Yujin
AU - Kang, Joongoo
AU - Park, Jinkyu
AU - Park, Jinhee
N1 - Publisher Copyright:
© 2025 The Author(s). Small published by Wiley-VCH GmbH.
PY - 2025/9/18
Y1 - 2025/9/18
N2 - Amorphous Fe-BTC, characterized by entirely defective metal nodes, has been employed for the effective adsorption of toxic selenite anions from aqueous solutions. Remarkably, Fe-BTC maintains high adsorption efficiency across a broad pH range (2–12), achieving a maximum adsorption capacity of 491 mg g−1, ranking among the highest recorded for adsorbents, including MOFs. The adsorption process involves distinct chemical interactions depending on pH: weak and variable interactions under acidic conditions (pH 2) and strong, diverse coordination modes under alkaline conditions (pH 11). Notably, the strong coordination ability of selenite ensures high selectivity over selenate and competing anions such as Cl−, NO2−, NO3−, CO32−, SO42−, and PO43−. The abundance of metal defects endows Fe-BTC with superior adsorption capacity compared to crystalline Fe-MOF, MIL-100(Fe). This study provides a comparative analysis of selenite adsorption on Fe-BTC under acidic and alkaline conditions, emphasizing pH-dependent adsorption mechanisms and their implications for designing effective adsorbents for toxic species removal.
AB - Amorphous Fe-BTC, characterized by entirely defective metal nodes, has been employed for the effective adsorption of toxic selenite anions from aqueous solutions. Remarkably, Fe-BTC maintains high adsorption efficiency across a broad pH range (2–12), achieving a maximum adsorption capacity of 491 mg g−1, ranking among the highest recorded for adsorbents, including MOFs. The adsorption process involves distinct chemical interactions depending on pH: weak and variable interactions under acidic conditions (pH 2) and strong, diverse coordination modes under alkaline conditions (pH 11). Notably, the strong coordination ability of selenite ensures high selectivity over selenate and competing anions such as Cl−, NO2−, NO3−, CO32−, SO42−, and PO43−. The abundance of metal defects endows Fe-BTC with superior adsorption capacity compared to crystalline Fe-MOF, MIL-100(Fe). This study provides a comparative analysis of selenite adsorption on Fe-BTC under acidic and alkaline conditions, emphasizing pH-dependent adsorption mechanisms and their implications for designing effective adsorbents for toxic species removal.
KW - amorphous materials
KW - chemisorption
KW - environmental chemistry
KW - metal-organic frameworks
KW - selenium
UR - https://www.scopus.com/pages/publications/105012389146
U2 - 10.1002/smll.202504212
DO - 10.1002/smll.202504212
M3 - Article
C2 - 40755203
AN - SCOPUS:105012389146
SN - 1613-6810
VL - 21
JO - Small
JF - Small
IS - 37
M1 - e04212
ER -