Jing Guo, Peizu Liu, Kai Cui, Dongsheng Feng, Junming Yi, Huidong Li
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引用次数: 0
Abstract
The development of sustainable adsorbents that integrate low-cost separation and high contaminant removal efficiency remains a critical challenge in wastewater treatment. This study engineered a sludge-based magnetic floatable particle adsorbent (SMFA-800-0.5) through synergistic co-pyrolysis of municipal sludge, red mud, and hollow glass microspheres (HGM) for the removal of basic fuchsin (BF) from dye wastewater. The results indicated that the dual-function separation approach utilizing Fe3O4 in situ formation from red mud (magnetization of 8.24 A·m−1) enables excellent recovery efficiency, eliminating the need for external Fe precursors, while the integration of HGM provides a self-floating capability with 76% surface retention over 3 h. The sludge-derived carbon matrix, enhanced by HGM’s structural support, provides hierarchical pores with a Bruner–Emmett–Teller (BET) surface area of 57.98 m2·g−1. The addition of bentonite clay effectively addresses powder dispersion issues in flow systems. This material demonstrates superior adsorption performance, achieving a capacity of 106.72 mg·g−1 for BF via pseudo-first-order kinetics. The enhanced adsorption performance is driven by multi-mechanism synergies, including electrostatic attraction and pore filling. This work pioneers a “zero-external-input, dual-recovery” paradigm for sustainable dye removal.
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