Adsorptive and Coagulative Removal of Trace Metals from Water Using Surface Modified Sawdust-Based Cellulose Nanocrystals

The presence of toxic metals in surface and natural waters, even at trace levels, poses a great danger to humans the ecosystem. Although combination adsorption coagulation techniques has potential eradicate this problem, use inappropriate media remains major drawback. This study reports on application NaNO2/NaHCO3 modified sawdust-based cellulose nanocrystals (MCNC) as both coagulant adsorbent for removal Cu, Fe Pb from aqueous solution. coagulants, prepared by electrostatic interactions, were characterized using Fourier transform infrared, X-ray diffraction (XRD), scanning electron microscopy/energy-dispersive spectrometry (SEM/EDS). amount coagulated/adsorbed was then analysed inductively coupled plasma atomic emission spectroscopy (ICP-AES). SEM analysis revealed patchy distributed floccules Fe-flocs, which an indication multiple mechanisms responsible onto MCNC. A shift peak position attributed C2H192N64O16 2θ = 30 24.5° occurred XRD pattern Pb- Cu-flocs. Different process variables, including initial metal ions concentration (10–200 mg/L), solution pH (2–10), temperature (25–45 °C) studied order investigate how they affect reaction process. Both Cu followed Langmuir isotherm with maximum capacity 111.1 2.82 mg/g, respectively, whereas suggestive multilayer process; however, found be 81.96 mg/g. sequence order: > Pb. utilization product different water matrices is effective way establish their robustness.