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Glyphosate (GP) has given rise to concerns regarding its environmental impact and potential hazards to human health. Herein, a solvothermal approach was used for doping Co and Zr into Fe 3 O 4 , thereby endowing the adsorption and catalytic efficacy for GP elimination and phosphate recovery from aqueous solution. The magnetic nanoparticles achieved 100 % removal of 100 mg/L GP in 30 min with 0.5 mM peroxymonosulfate (PMS). Electron paramagnetic resonance (EPR) test verified that both radical and non-radical pathways were produced in the catalytic oxidation process. Density functional theory (DFT) investigations have demonstrated that Co and Zr co-doping led to an improved removal efficiency of GP. Moreover, the as-prepared material used in this integrated PMS activation and adsorption maintained a high stability towards GP degradation and phosphate recovery during five successive cycles. This study provides an efficient technique for the removal of GP and the simultaneous adsorption of secondary inorganic phosphorus from water. [Display omitted] • Co and Zr co-doped Fe3O4 nanoparticles were synthesized by a facile solvothermal method. • Synergism of adsorption and PMS-activation for glyphosate removal and phosphorus recovery from solution. • Both radical and non-radical pathways were responsible for glyphosate degradation. • The performance and mechanism were elucidated via characterizations and DFT calculations. [ABSTRACT FROM AUTHOR]

In this study, adsorption of hexavalent chromium has been examined on ZIF-8 and its various composites. ZIF-8 was modified by using amine groups, GO and Mg(OH) _2 /GO. ZIF-8, Mg(OH) _2 /GO, ZIF-8/NH _2 , ZIF-8/Mg(OH) _2 /GO, ZIF-8/NH _2 /GO and ZIF-8/NH _2 /Mg(OH) _2 /GO was studied for Cr(VI) adsorption Several characterization techniques were used for the structural and surface characterization such as Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) surface area analyzer. The impact of various adsorption parameters (contact time, pH, initial concentration of Cr(VI) and absorbent dosage) was studied in batch experiments. Different kinetic and isotherm models were applied on equilibrium data. The adsorption process of ZIF-8 and its composites was explained by pseudo-second-order kinetic model as well as Langmuir isotherm, with maximum removal efficiency of 98% for Cr(VI) by ZIF-8/NH _2 /Mg(OH) _2 /GO.