Synthesis of nano-MgO hybrid SDB hydrophobic catalyst carriers and its adsorption behavior of Fe³⁺

Styrene-divinylbenzene copolymer (SDB) was an important hydrophobic catalyst carrier for hydrogen-water liquid-phase catalytic exchange (LPCE) technology. At present, SDB carriers still have weak strength and poor hydrophobicity. To solve this problem, nano-magnesium oxide (nano-MgO) was used to modify SDB carrier by inorganic hybridization. Doped with the nano-MgO, styrene-divinylbenzene copolymer performs better and can be used in tritium-containing wastewater treatment. Results show that the modified carriers have a specific surface area of 438.220 m(2)/g and 426.266 m(2)/g, a hydrophobic angle of 142(degrees) and 136(degrees) and a compressive strength of 48.8 N and 53.3 N. The adsorption experiments were performed with Fe3+ instead of platinum (Pt). Adsorption kinetics, adsorption thermodynamics and adsorption isotherm were used to describe the adsorption behavior of Fe3+ on the carrier, which provides a good basis for the carrier to load Pt. The research provides a novel styrene-divinylbenzene copolymer catalyst carrier with strong hydrophobicity, high strength and high specific surface.