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Adsorption-desorption characteristics of typical heavy metal pollutants in submerged zone sediments: a case study of the Jialu section in Zhengzhou, China

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Abstract

In recent years, the accumulation ability of heavy metals in sediment has become a key indicator for sediment pollution prevention and control. The adsorption-desorption processes of typical heavy metal pollutants in sediments under different conditions were explored and relied in this article. In addition, different binary competitive adsorption systems were designed to study the competitive adsorption properties of heavy metal contaminants, The quasi-secondary kinetic model simulated the adsorption kinetic process. The sediment adsorption rates for heavy metals were (in descending order) Cu, Pb, Cd, Zn. The Elovich equation simulated the desorption kinetics process better, and the sediment desorption rates for heavy metals were (in descending order) Cd, Cu, Zn, Pb. The average free adsorption energy E of heavy metals was within the range of 8–16 kJ∙mol−1. After the removal of organic matter, the ability of the sediment to sequester heavy metals decreases, The binary competitive adsorption results showed that the presence of interfering ions had the greatest effect on Cd and the least effect on Pb. The adsorption and desorption of the four heavy metals by the sediments in the submerged zone increased with the increase of temperature, and the ratio of desorption to adsorption also increased therewith: the adsorptions of heavy metals by the sediments were all spontaneous processes (under heat absorption reactions). The presence of organic matter can increase the ability of the sediment to sequester Cd, Pb, Cu, and Zn. Additionally, heavy metals exhibited significant selective adsorption properties.

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All data generated or analyzed during this study are included in this published article [and its supplementary information files].

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Funding

This research was funded by the National Natural Science Foundation of China (Grant Nos. 41402225 and 41972261), the Key Scientific Research in Universities in Henan Province (Grant No. 21A170014), and Key Research and Development and Promotion Program of Henan Province in 2022 (Key Science and Technology).

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Conceptualization, Furong Yu and Yangkun Li; sample collection, Furong Yu; experiment and analysis, Yangkun Li; writing—original draft preparation, Yuekun Ji; data curation, Furong Yu; chart drawing: Yue Meng and Yangkun Li; writing—review and editing, Furong Yu and Yuekun Ji; visualization, Yuekun Ji; project administration, Furong Yu and Zhi** Li; funding acquisition, Furong Yu and Zhi** Li. All the authors have read and approved the manuscript. All authors agree to the publication of this manuscript.

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Correspondence to Zhi** Li.

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Yu, ., Ji, Y., Li, Z. et al. Adsorption-desorption characteristics of typical heavy metal pollutants in submerged zone sediments: a case study of the Jialu section in Zhengzhou, China. Environ Sci Pollut Res 30, 96055–96074 (2023). https://doi.org/10.1007/s11356-023-29059-7

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  • DOI: https://doi.org/10.1007/s11356-023-29059-7

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