Mesoporous Alumina Nanoparticles as Host Tunnel‐like Pores for Removal and Recovery of Insecticides from Environmental Samples

Abstract Water contamination with lindane, which is a persistent, toxic, and priority insecticide, is a major problem worldwide. This study presents the fabrication of mesoporous alumina nanoparticles (MA–NPs) with a large surface‐area‐to‐volume ratio, active surface sites, and open channel pores to trap/adsorb insecticide molecules, such as lindane. Key factors, such as temperature, pH (i.e., 4.5), adsorbate–adsorbent concentration, and contact time, influence the thermodynamics and kinetics of heterogeneous lindane–MA–NP adsorption. Results show that the maximum adsorption capacity (qm) of lindane is 25.54 mg g−1 at 20 °C. MA–NPs also exhibits a high uptake efficiency (>80 %) of lindane after 20 cycles, which results in effective regeneration and reusability characteristics. MA–NPs were also applied in real environmental samples from tap and lake water sources contaminated with lindane. The results indicate that the MA–NPs show evidence of their environmental impact, their potential influence on the removal and recovery of lindane, and their possible contribution to waste management.