The rapid increase in toxic dye wastewater generated from various industries remains a severe public health issue and prime environmental protection concern, posing a major challenge to existing conventional water treatment systems. Among them, adsorption is considered to be the most efficient due to its high removal efficiency, easy operation, cost-effectiveness, and recyclability of the sorbents [1]. In recent years, covalent triazine frameworks (CTFs) have garnered considerable attention due to their distinctive structural characteristics, including a nitrogen-rich composition, fully conjugated framework, chemical stability, customizable pore size, expansive surface area, and exceptional porosity [2, 3]. These inherent properties render CTFs highly appealing for a wide range of applications, particularly in environmental remediation [4]. In this work, a nanosorbent based on CTF with a high surface area was synthesized from melamine and isophthalic acid under the solvothermal method. The results showed that the obtained sorbent has excellent efficiency in removing methyl orange (MO) and malachite green (MG) dyes from water under mild conditions and natural pH. The ability of non-covalent interactions, such as hydrogen bonding, π-π stacking, and electrostatic interactions between CTF and dye molecules plays a significant role in removing them from water.

Keywords