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Adsorption/desorption of naphthalene and phenanthrene in a binary competitive system in the riparian zone

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Abstract

Polycyclic aromatic hydrocarbons (PAHs) such as naphthalene (Nap) and phenanthrene (Phe) are organic pollutants that are of concern because of their environmental toxicity. Adsorption is a promising process for the removal of Nap and Phe from water and soil. The riparian zone between a river and a riparian aquifer, which is rich in adsorption medium, may be important for PAH remediation. Nap and Phe may be removed from the surface water through adsorption by the media in the riparian zone. However, there is still a lack of the removal patterns and mechanisms of media in the riparian zone to remediate water contaminated by Nap and Phe simultaneously. In this study, focusing on the typical PAHs (Nap and Phe) as target pollutants, batch static adsorption and desorption experiments of Nap and Phe were carried out to explore the competitive adsorption mechanisms of Nap and Phe in the binary system. Batch dynamic adsorption experiments were conducted to ascertain the adsorption regulation of Nap and Phe in sediments during the recharge of groundwater by river water in a riparian zone. The static adsorption experiment results showed that competitive adsorption of Nap and Phe occurred, and a mutual inhibitory effect of Nap and Phe adsorption was observed in the binary system. Phe had a stronger inhibitory effect on Nap, Phe was preferentially adsorbed on the medium in binary adsorption. The results of batch dynamic experiments showed that, in terms of adsorption, the riparian zone in the study area showed stronger performance for removal of Phe than Nap. The results of this paper could be useful for alleviating Nap and Phe pollution of groundwater and developing treatment protocols for groundwater exposed to Nap and Phe.

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Data availability

The dataset used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

We thank Gareth Thomas, PhD, and Gabrielle David, PhD, from Liwen Bianji, Edanz Group China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

Funding

This work was supported by the National Natural Science Foundation of China (No. 41977160) and the Interdisciplinary Research Fund for Doctoral Postgraduates of Jilin University (No.101832020DJX073).

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Contributions

WD: Conceptualization, Writing -review, Supervision, Funding acquisition. XS: Writing-original draft, Data curation, Formal analysis. YW: Methodology & editing, Formal analysis, ZC: Investigation. TL, YW and LY: Resources & editing.

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Correspondence to Yuyu Wan.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Dong, W., Shen, X., Wan, Y. et al. Adsorption/desorption of naphthalene and phenanthrene in a binary competitive system in the riparian zone. Environ Geochem Health 44, 3875–3890 (2022). https://doi.org/10.1007/s10653-021-01147-y

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  • DOI: https://doi.org/10.1007/s10653-021-01147-y

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