The Synergistic Effect of Clay Minerals on the Photodegradation of Humic

Abstract

The study systematically analyzes the photodegradation processes of humic in the plateau lake Erhai Lake and their interactions with clay minerals. The experiments simulate photodegradation reactions under natural conditions, comparing the changes before and after photodegradation reactions. The reduction in total organic carbon (TOC) and changes in the functional groups of organic matter in the photodegradation products of humic are recorded. Aromatic and aliphatic compounds have a key role in humic photodegradation. The photodegradation rate of humic shows a nonlinear change, and The presence of clay minerals accelerates the photodegradation process of humic. The adsorption effects of clay minerals significantly alter the photochemical behavior of humic. Under the influence of clay minerals, the adsorption of humic by clay minerals increases their contact with photons, thereby enhancing the photodegradation efficiency of humic. The continuous photodegradation reaction continuously reduces the particle size of humic adsorbed on the surface of clay minerals, further increasing the adsorption of humic on the surface of clay minerals, accelerating the entire system.