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Heavy Metal Ions’ Poisoning Behavior-Inspired Etched UiO-66/CTS Aerogel for Pb(II) and Cd(II) Removal from Aqueous and Apple Juice
Journal of Hazardous Materials ( IF 9.038 ) Pub Date : 2020-06-29 , DOI: 10.1016/j.jhazmat.2020.123318
Weixia Yang; Meijie Cheng; Yong Han; Xueli Luo; Chunhua Li; Wenzhi Tang; Tianli Yue; Zhonghong Li

Here, inspired by the poisoning process of heavy metal in human body that the accidental ingested heavy metal can anchor to the functional groups of DNA/protein/enzyme to exert their toxicities during the rapid blood circulation, we developed the adsorbent that enveloped Etched UiO-66 with abundant functional groups into chitosan (CTS) aerogel to capture Pb(II) and Cd(II) in aqueous and apple juice. SEM, XRD and FTIR spectra were used to characterize the Etched UiO-66/CTS aerogel. The results showed that Etched UiO-66/CTS aerogel has a three-dimensional porous structure, and -OH groups of CTS interact with Zr(IV) of Etched UiO-66 to form the stable UiO-66/CTS aerogel. Benefiting from the intrinsic properties of porous and abundant functional groups, Etched UiO-66/CTS aerogel exhibits satisfactory adsorption capacities of 654.9 mg g-1 for Pb(II) and 343.9 mg g-1 for Cd(II) at 45 °C. Moreover, the aerogel shows excellent removal efficiencies of 98.21% for Pb(II) and 98.70% for Cd(II) with initial concentration of 1.0 mg L-1 in apple juice with little effect on the quality of apple juice. This strategy of mimetic heavy metal ions’ poisoning behavior opens up a new avenue for the removal of heavy metal ions in complex matrices.
更新日期:2020-06-29

 

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