The treatment of multicontaminant wastewater has attracted extensive attention in recent years. Herein, we synthesized a porous and hydrophobic composite (Zr-MOF-SH/MF) via the in situ growth of mercapto-functionalized Zr-metal–organic frameworks (MOFs) (Zr-MOF-SH) on the surface of a melamine formaldehyde (MF) sponge. The successful growth of hydrophobic Zr-MOF-SH, as confirmed by SEM, XRD, and XPS analysis, made the MF sponge become hydrophobic with a water contact angle of 125°. The adsorption capacity of the Zr-MOF-SH/MF composite for dichloromethane can reach up to 113 g/g. Moreover, the composite can efficiently and selectively remove Hg²⁺ ions from water. Especially, PCN-224-MAA/MF had an adsorption capacity of 412.5 mg/g for Hg²⁺ ions. The removal efficiency of Hg²⁺ ions increased as the oil content in the oil–water mixture increased. In addition, PCN-224-MAA/MF can be recovered and reused five times with only a slight decrease in adsorption capacity. This study provides a promising strategy for the synthesis of a dual-functional composite that exhibits excellent performance in removing oil and heavy metal ions simultaneously from water.

中文翻译：

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具有巯基功能的Zr-MOF /三聚氰胺海绵复合材料的构建，可有效去除水中的油和重金属离子

近年来，多污染物废水的处理引起了广泛的关注。在这里，我们通过巯基官能化的Zr-金属-有机骨架（MOF）（Zr-MOF-SH）在三聚氰胺甲醛表面的原位生长合成了多孔疏水性复合材料（Zr-MOF-SH / MF） （MF）海绵。SEM，XRD和XPS分析证实，疏水性Zr-MOF-SH的成功生长使MF海绵变得疏水，水接触角为125°。Zr-MOF-SH / MF复合材料对二氯甲烷的吸附容量可以达到113 g / g。而且，该复合物可以有效地和选择性地从水中除去Hg ²⁺离子。特别是，PCN-224-MAA / MF对Hg ²⁺离子的吸附容量为412.5 mg / g 。汞的去除效率随着油水混合物中油含量的增加，2 ⁺离子增加。此外，PCN-224-MAA / MF可以被回收并重复使用五次，而吸附能力仅略有下降。这项研究为双功能复合材料的合成提供了一种有前途的策略，该复合材料在同时从水中去除油和重金属离子方面表现出优异的性能。