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Adsorption of 2,4-dichlorophenoxyacetic acid by UiO-66-NH2 obtained in a green way

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Abstract

In this study, a zirconium elemental organic framework (UiO-66-NH2) was prepared by a green synthesis method and showed a good adsorption performance for removing 2,4-dichlorophenoxyacetic acid (2,4-D) from water. UiO-66-NH2 was analyzed by a variety of characterization methods and the adsorption properties of 2,4-D on UiO-66-NH2 were investigated by static adsorption experiments. The results showed that the adsorption of 2,4-D had a wide pH range (2–10) and good salt tolerance with the adsorption equilibrium time about 2 h. The maximum adsorption capacity from Langmuir was up to 652 mg g−1 at 303 K. The isotherms can be described by Langmuir model and the adsorption kinetics was consistent with pseudo-second-order kinetic model and Elovich model. The regeneration efficiency was still 95% after 5 cycles with 0.01 mol L−1 NaOH as desorption solution. The feasibility of practical application of UiO-66-NH2 was explored by simulating actual wastewater at different pH. UiO-66-NH2 is promising to remove 2,4-D from water.

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The dataset generated and analyzed during this study could be obtained from the corresponding author on reasonable request.

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Funding

This work was supported in part by the Henan Province Basis and Advancing Technology Research Project in China (142300410224).

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Contributions

Xiaoting Zhang: conceptualization; methodology; formal analysis; investigation; visualization, software; writing original draft.

Runping Han: conceptualization; resources; project administration; writing—review and editing; visualization; supervision; funding acquisition.

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Correspondence to Runping Han.

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The authors declare no competing interests.

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Zhang, X., Han, R. Adsorption of 2,4-dichlorophenoxyacetic acid by UiO-66-NH2 obtained in a green way. Environ Sci Pollut Res 29, 90738–90751 (2022). https://doi.org/10.1007/s11356-022-22127-4

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  • DOI: https://doi.org/10.1007/s11356-022-22127-4

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