Adsorption and Removal Kinetics of 2,4‐Dinitroanisole and Nitrotriazolone in Contrasting Freshwater Sediments: Batch Study.

This article focuses on the environmental fate of two insensitive high-explosive (IHE) compounds, 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO), specifically their adsorption and microbially mediated removal kinetics in diverse freshwater sediments. The study found that DNAN rapidly adsorbs onto sediments, with adsorption strongly influenced by sediment total organic carbon (TOC) content and cation exchange capacity (CEC), and adsorption rates decreasing with increasing temperature. In contrast, NTO showed negligible abiotic adsorption except in high-TOC sediments, indicating a higher potential for environmental mobility. Both DNAN and NTO were removed more rapidly under biotic conditions, particularly at warmer temperatures and in fine-grained, organic-rich sediments, highlighting the role of microbial activity in their degradation. These findings provide important parameters for modeling the environmental transport and transformation of DNAN and NTO in freshwater systems.