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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.2c03378
|2 doi
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|a pubmed24n1179.xml
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|a (DE-627)NLM353834521
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|a (NLM)36877598
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Lin, Zishen
|e verfasserin
|4 aut
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|a Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction
|b Unveiling the Effect of Ethylenediamine on Physicochemical Properties
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 21.03.2023
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|a Date Revised 21.03.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Amorphous zero-valent iron (AZVI) has attracted wide attention due to its high-efficiency reduction ability. However, the effect of different EDA/Fe(II) molar ratios on the physicochemical properties of the synthesized AZVI requires further investigation. Herein, series of AZVI samples were prepared by changing the molar ratio of EDA/Fe(II) to 1/1 (AZVI1), 2/1 (AZVI@2), 3/1 (AZVI@3), and 4/1 (AZVI@4). When the EDA/Fe(II) ratio increased from 0/1 to 3/1, the Fe0 proportion on the AZVI surface increased from 26.0 to 35.2% and the reducing ability was enhanced. As for AZVI@4, the surface was severely oxidized to form a large amount of Fe3O4, and the Fe0 content was only 74.0%. Moreover, the removal ability of Cr(VI) was in the order AZVI@3 > AZVI@2 > AZVI@1 > AZVI@4. The isothermal titration calorimetry results revealed that the increase of the molar ratio of EDA/Fe(II) would lead to the stronger complexation of EDA with Fe(II), which resulted in the gradual decrease of the yield of AZVI@1 to AZVI@4 and the gradual deterioration of water pollution after the synthesis. Therefore, based on the evaluation of all indicators, AZVI@2 was the optimal material, not only because its yield was as high as 88.7% and the secondary water pollution level was low, but most importantly, the removal efficiency of Cr(VI) by AZVI@2 was excellent. Furthermore, the actual Cr(VI) wastewater with the concentration of 14.80 mg/L was treated with AZVI@2, and the removal rate of 97.0% was achieved after only a 30 min reaction. This work clarified the effect of different ratios of EDA/Fe(II) on the physicochemical properties of AZVI, which provided insights for guiding the reasonable synthesis of AZVI and is also conducive to investigating the reaction mechanism of AZVI in Cr(VI) remediation
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|a Journal Article
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1 |
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|a Liu, Fobang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zheng, Chunli
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhu, Aibin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ma, Xiaowei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Peng, Yuanzhe
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Chi
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 39(2023), 11 vom: 21. März, Seite 4026-4036
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:39
|g year:2023
|g number:11
|g day:21
|g month:03
|g pages:4026-4036
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|u http://dx.doi.org/10.1021/acs.langmuir.2c03378
|3 Volltext
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|d 39
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