Characteristics and Influencing Factors of Efficient Adsorption of Benzoanthracene by Chromatin/ Carrageenan Composite Materials

Benzoanthracene (BaA) is one of the most important pollutants in polycyclic aromatic hydrocarbons ( PAHs) , with characteristics such as wide distribution, strong stability, strong bioaccumulation, and strong carcinogenicity, seriously endangering human health and the environment. In this study, a novel chromatin/carrageenan composite materials was prepared based on the intercalation binding between BaA and DNA, which is a simple and effective adsorbent that can effectively adsorb BaA from aqueous solution. Under optimal conditions, the chromatin/carrageenan composite material exhibits a BaA adsorption efficiency of 94% and an adsorption amount of 0. 0075mg·g-1. This adsorption process is influenced by reaction time, reaction temperature, pH value, and the dosage of the composite materials. Among them, high or low temperatures, acidic or alkaline environments will all reduce the adsorption efficiency. However, with the extension of reaction time or the increase of composite materials dosage, the adsorption efficiency will gradually increase. The process of removing BaA from chromatin/carrageenan composite material is more in line with pseudo-second-order kinetic model and Langmuir model, and thermodynamic model further indicated that the process is spontaneous. The above results indicate that chromatin/ carrageenan composite materials can serve as a novel adsorbent for BaA adsorption.