Superoleophobic Hierarchical Honeycomb Hydrogels for Effective Heavy Metal Removal in Crude Oil Emulsion

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Here, we designed a bioinspired hydrogel surface with underwater superoleophobicity for heavy metal adsorption, effectively addressing the challenge of adsorption site clogging caused by crude oil emulsions. Mimicking reentrant structures lotus leaf undersides, silica dioxide (SiO2) nanoparticles were self-assembled on surface, forming stable hydration layer that imparts unique superoleophobic properties in an aqueous environment. The poly(vinyl alcohol)-sodium alginate-SiO2 capsule (PSSC) exhibited hierarchical honeycomb pore structure nano screen mesh, achieving excellent capacities typical cationic metals (Pb2+, Cu2+, Cd2+, and Cr3+) both solutions optimal pH was determined to be between 4 5, while increasing temperature significantly inhibited process. Maximum Pb2+, Cr3+ reached 291.5 mg/g, 278.7 259.4 171.4 mg/g Competitive observed multicomponent systems, being adsorbed preferentially. mechanisms primarily governed chemical physical electrostatic attraction, functional groups such as −COOH −OH playing key role ion binding. This study demonstrates potential PSSC efficient, cost-effective adsorbent removing from complex matrices, wastewater emulsions, highlights its applicability various environmental remediation scenarios.

Language: Английский

Microplastics in livestock manure and compost: environmental distribution, degradation behavior, and their impact on antibiotic resistance gene dissemination

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162881 - 162881

Published: April 1, 2025

Language: Английский