Nitrate contamination of water is a growing issue due to agricultural practices, industrial activities, and the natural characteristics of water sources. Hydrotalcites, or layered double hydroxides (LDHs), are effective adsorbents for contaminants such as nitrates. In this study, hydrogels incorporating LDHs were developed to create filters for water remediation. Synthesis, characterization, and nitrate removal tests were performed, achieving good results in both simulated and real water. Subsequently, a composite material of LDHs and biopolymers (alginate) was fabricated into spheres and 3D structures, which were tested as adsorbent materials.
This work is relevant in green chemistry because it presents a sustainable and effective solution for the removal of water contaminants, using natural materials and environmentally friendly methods. Layered double hydroxides and biopolymers, such as alginate, are more eco-friendly options compared to conventional methods that often involve the use of harmful chemicals or non-biodegradable materials.