Surfactant-Modified Hydrophobic Biochar Derived from Laver (Porphyra haitanensis) with Superior Removal Performance for Kitchen Oil

Abstract

In this study, a novel absorpent (MSAR600°C) with a hydrophobic surface and hierarchical porous structure for the removal of kitchen oil was facilely fabricated from the macroalgae, laver (Porphyra haitanensis) by incorporating high-temperature carbonization and alkyl polyglucosides (APG) and rhamnolipid (RL) surfactants modifi-cation. The characterization results showed MSAR600°C possessed a louts-leaf-like papillae microstructure with high contact angle (137.5°), abundant porous structure with high specific surface area (23.4 m2/g), and various oxygen-containing functional groups (-OH, C=O, C-O). Batch adsorption experiments were conducted to inves-tigate the effect of adsorption time, temperature, pH, and absorbent dose on kitchen oil adsorption performance. Then the practical application for the removal of kitchen oil using MSAR600°C was also performed. The results showed that MSAR600°C had a higher removal efficiency for kitchen oil (75.98%), compared with the commercial detergent (72.3%). This study demonstrates an example of fabricating a green tableware detergent for enhanced removal performance of kitchen oil.