Removing trace chromium from high concentration vanadium solution by photoreduction deposition with Ti–Zr solid solution

He, Kunpeng; Chen, Pingting; Yuan, Biao; Sun, Fujin; He, Jian; Wu, Pan; Liu, Changjun; Jiang, Wei

doi:10.1016/j.seppur.2022.120855

Cited by 4 publications

(1 citation statement)

References 43 publications

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“…Therefore, based on its genotoxic and carcinogenic effects, it has been necessary to develop types of costeffective and efficient methods which can remove of Cr (VI) from industrial and municipal wastewater. Scientists and researchers have developed various strategical methods such as sedimentation, precipitation, coagulation, flotation, ion exchange, biological treatment, adsorption, and reverse osmosis to reduce environmental problems [14][15][16][17]. Among them, adsorption has been preferred as the most effective and efficient method because of its operational simplicity and environmental friendliness for removing ultra-trace levels of Cr (VI) from wastewater [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

In Situ Polyaniline Immobilized ZnO Nanorods for Efficient Adsorptive Detoxification of Cr (VI) from Aquatic System

Alharthi

Alshammari

Hasan

2023

Water

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The elimination of toxic heavy metal ions from wastewater has been found to be of great importance in human as well marine animal wellbeing. Among various heavy metals, Cr (VI) has been found to be one of the highly toxic and carcinogenic heavy metals which are found to be dissolved in the water stream, the urgent treatment of which needs to be a priority. The present study demonstrates the fabrication of zinc oxide nanorods (ZnO NRs) and an immobilized polyaniline nanorod (ZnO@PAni NR) composite through an in situ free radical polymerization reactions. The material synthesis and purity were verified by X-ray diffractometer (XRD), Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy dispersive spectroscope (EDS), and transmission electron microscope (TEM). Further, ZnO@PAni NRs were applied as an adsorbent for Cr (VI) in the aquatic system and exhibited a tremendous removal efficiency of 98.76%. The impact of operating parameters such as dose effect and pH on adsorption properties were studied. The uptake mechanism of Cr (VI) by ZnO@PAni was best explained by pseudo-second-order reaction, which suggested that the adsorption of Cr (VI) by the synthesized adsorbent material was processed by chemisorption, i.e., through formation of chemical bonds. The adsorption process proved viable and endothermic thermodynamically, and best supported by a Langmuir model, suggesting a monolayer formation of Cr (VI) on the surface of ZnO@PAni NRs.

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