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Article

Removal of Hexavalent Chromium in Aqueous Solution by Cellulose Filter Paper Loaded with Nano-Zero-Valent Iron: Performance Investigation and Numerical Modeling

by
Huali Li
1,
Zhongyu Ren
1,
Dan Huang
2,
Qi Jing
1,* and
Haokai Tang
1
1
Institute of Water Resources and Engineering, Beijing University of Technology, Beijing 100124, China
2
Songliao Water Conservancy Commission, Songliao Basin Water and Soil Conservation Monitoring Center Station, Changchun 130021, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2023, 20(3), 1867; https://doi.org/10.3390/ijerph20031867
Submission received: 6 January 2023 / Revised: 12 January 2023 / Accepted: 13 January 2023 / Published: 19 January 2023
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Abstract

Cr(VI) pollution in water bodies is very harmful to human health and the environment. Therefore, it is necessary to remove Cr(VI) from water. In this study, the composite (FP-nZVI) was prepared by loading nano-zero-valent iron (nZVI) onto cellulose filter paper (FP) using a liquid-phase reduction method to improve the dispersibility and oxidation resistance of nZVI. In batch experiments, the effects of iron loading of FP-nZVI, initial concentration of Cr(VI), temperature, and pH on Cr(VI) removal were particularly investigated. The maximum removal rate of 98.6% was achieved at 25 °C, pH = 5, initial concentration of Cr(VI) of 20 mg/L, and FeCl3·6H2O solution concentration of 0.8 mol/L. The removal of Cr(VI) by FP-nZVI conformed to a pseudo-second-order kinetic model and Langmuir isotherm model. The mechanism of Cr(VI) removal was a multi-step removal mechanism, involving adsorption, reduction, and coprecipitation. Column experiments investigated the effect of flow rate (1 mL/min, 3 mL/min, and 5 mL/min) on Cr(VI) removal. We found that increasing flow rate slightly decreased the removal rate of Cr(VI). The transport of Cr(VI) in composite porous media was simulated using HYDRUS-1D, and the results show that the two-site model can well simulate the reactive transport of Cr(VI). This study may provide a useful reference for the remediation of groundwater contaminated with Cr(VI) or other similar heavy metals using FP-nZVI.
Keywords: filter paper; nano-zero-valent iron; Cr(VI) removal; transport simulation; HYDRUS-1D filter paper; nano-zero-valent iron; Cr(VI) removal; transport simulation; HYDRUS-1D
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MDPI and ACS Style

Li, H.; Ren, Z.; Huang, D.; Jing, Q.; Tang, H. Removal of Hexavalent Chromium in Aqueous Solution by Cellulose Filter Paper Loaded with Nano-Zero-Valent Iron: Performance Investigation and Numerical Modeling. Int. J. Environ. Res. Public Health 2023, 20, 1867. https://doi.org/10.3390/ijerph20031867

AMA Style

Li H, Ren Z, Huang D, Jing Q, Tang H. Removal of Hexavalent Chromium in Aqueous Solution by Cellulose Filter Paper Loaded with Nano-Zero-Valent Iron: Performance Investigation and Numerical Modeling. International Journal of Environmental Research and Public Health. 2023; 20(3):1867. https://doi.org/10.3390/ijerph20031867

Chicago/Turabian Style

Li, Huali, Zhongyu Ren, Dan Huang, Qi Jing, and Haokai Tang. 2023. "Removal of Hexavalent Chromium in Aqueous Solution by Cellulose Filter Paper Loaded with Nano-Zero-Valent Iron: Performance Investigation and Numerical Modeling" International Journal of Environmental Research and Public Health 20, no. 3: 1867. https://doi.org/10.3390/ijerph20031867

APA Style

Li, H., Ren, Z., Huang, D., Jing, Q., & Tang, H. (2023). Removal of Hexavalent Chromium in Aqueous Solution by Cellulose Filter Paper Loaded with Nano-Zero-Valent Iron: Performance Investigation and Numerical Modeling. International Journal of Environmental Research and Public Health, 20(3), 1867. https://doi.org/10.3390/ijerph20031867

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