Sustainable Phosphate Remediation via Hierarchical Mg-Fe Layered Double Hydroxides on Magnetic Biochar from Agricultural Waste DOI Creative Commons
Xiuling Li, Lei Xin,

Yuhan Peng

и другие.

Magnetochemistry, Год журнала: 2025, Номер 11(4), С. 27 - 27

Опубликована: Апрель 1, 2025

Addressing aquatic phosphate pollution requires advanced materials that combine high selectivity with recyclability. Here, we present a hierarchically structured composite integrating Mg-Fe layered double hydroxides (LDHs) magnetic biochar derived from mulberry branches—an abundant agricultural byproduct. Through hydrothermal synthesis, the achieves unique architecture combining Fe3O4-enabled recovery (2.63 emu·g−1 saturation) LDHs’ anion exchange capacity and biochar’s porous network. Systematic characterization reveals capture mechanisms dominated by hydrogen bonding through deprotonated carboxyl groups, inner-sphere complexation metal oxides, interlayer exchange, enabling 99.22% removal at optimal conditions (pH 6, 25 °C). Crucially, material demonstrates exceptional over competing Cl− NO3− ions while maintaining 87.83% efficiency after three regeneration cycles via alkaline treatment. Kinetic thermodynamic analyses confirm chemisorption-driven uptake aligned pseudo-second-order kinetics (R2 > 0.9998) Langmuir monolayer adsorption (7.72 mg·g−1 capacity). This waste-derived establishes sustainable paradigm for eutrophication control, merging selective sequestration energy-efficient circular water treatment applications.

Язык: Английский

Sustainable Phosphate Remediation via Hierarchical Mg-Fe Layered Double Hydroxides on Magnetic Biochar from Agricultural Waste DOI Creative Commons
Xiuling Li, Lei Xin,

Yuhan Peng

и другие.

Magnetochemistry, Год журнала: 2025, Номер 11(4), С. 27 - 27

Опубликована: Апрель 1, 2025

Addressing aquatic phosphate pollution requires advanced materials that combine high selectivity with recyclability. Here, we present a hierarchically structured composite integrating Mg-Fe layered double hydroxides (LDHs) magnetic biochar derived from mulberry branches—an abundant agricultural byproduct. Through hydrothermal synthesis, the achieves unique architecture combining Fe3O4-enabled recovery (2.63 emu·g−1 saturation) LDHs’ anion exchange capacity and biochar’s porous network. Systematic characterization reveals capture mechanisms dominated by hydrogen bonding through deprotonated carboxyl groups, inner-sphere complexation metal oxides, interlayer exchange, enabling 99.22% removal at optimal conditions (pH 6, 25 °C). Crucially, material demonstrates exceptional over competing Cl− NO3− ions while maintaining 87.83% efficiency after three regeneration cycles via alkaline treatment. Kinetic thermodynamic analyses confirm chemisorption-driven uptake aligned pseudo-second-order kinetics (R2 > 0.9998) Langmuir monolayer adsorption (7.72 mg·g−1 capacity). This waste-derived establishes sustainable paradigm for eutrophication control, merging selective sequestration energy-efficient circular water treatment applications.

Язык: Английский

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