Carbamodithioate‐Modified Nanoscale Zerovalent Iron: Redox‐Active Hybrid for Cr (VI) and p‐Nitrophenol Remediation

The rise of redox‐active nanoscale zerovalent iron materials toward the decontamination of heavy metals and nitroaromatics is witnessing upward trend toward sustainable water treatment technologies. Herein, we synthesize air‐stable carbamodithioate‐modified nanoscale zerovalent iron (NZVI‐CD) via in situ route at room temperature conditions. The structure, wetting, and morphology of NZVI‐CD were evaluated using various characterization techniques like XRD, FT‐IR, XPS, SEM, TEM, and water contact angle (WCA) measurements. NZVI‐CD showcases the excellent reduction of hexavalent chromium and p‐nitrophenol under room temperature and optimal pH conditions. Kinetic studies revealed that removal of hexavalent chromium and p‐nitrophenol using NZVI‐CD follows pseudo second order kinetics, besides favoring Langmuir adsorption isotherm model with a maximum sorption capacity ( Q _max ) of 178.57 mg g ⁻¹ and 45.45 mg g ⁻¹ for Cr (VI) and p‐nitrophenol, respectively.