We report the Schiff base ligand for the decontamination of Arsenic (As-V). The chromogenic ligand namely L-1 was prepared in the easiest condensation method using 2-amino-6-nitro-benzothiazole and 10-hydroxyanthracene-9-carbaldehyde in a mild acidic DMF medium. We characterized the ligand with L-1 using FT-IR and 1H-NMR. A thermal study was carried out to verify the thermal stability of the Ligand L-1. The ligand showed a reasonable As-V adsorption quantity of 10 mg/g. In addition, we carried out optimization for the maximum As-V removal by adjusting the following factors: concentration, dosage, pH, and temperature. The reusability confirmed our material to be reused two times for the As-V removal purpose. © 2024 Elsevier B.V., All rights reserved.