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Integrated adsorption and visible-light photodegradation of aqueous clofibric acid and carbamazepine by a Fe-based metal-organic framework

Gao, Yanxin and Yu, Gang and Liu, Kai and Deng, Shubo and Wang, Bin and Huang, Jun and Wang, Yujue (2017) Integrated adsorption and visible-light photodegradation of aqueous clofibric acid and carbamazepine by a Fe-based metal-organic framework. Chemical Engineering Journal, 330 . pp. 157-165. ISSN 1385-8947 . http://resolver.caltech.edu/CaltechAUTHORS:20170628-105435986

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Abstract

The development of efficient materials for removing pharmaceuticals from water has been a matter of great concern. As a new class of porous materials, metal-organic frameworks (MOFs) have attracted considerable attention in the field of environmental remediation. In this article, a photocatalytic adsorbent MIL-53(Fe) was successfully prepared by solvothermal method and used for the removal of two typical pharmaceuticals clofibric acid (CA) and carbamazepine (CBZ) from water. MIL-53(Fe) exhibited good adsorption performance and the maximum adsorption capacities of CA and CBZ are about 0.80 mmol/g and 0.57 mmol/g, respectively. The adsorption mechanisms of CA and CBZ are mainly due to electrostatic interaction and π-π interaction, respectively. Further, MIL-53(Fe) exhibited high photocatalytic activity and stability under visible light. The photocatalytic efficiency could be improved significantly with the addition of a small amount of H_2O_2, and the corresponding photodegradation efficiencies for CA and CBZ both reached up to 90%, which are higher than those of Fe(II)/H_2O_2 and TiO_2 under visible light. The photocatalytic performance was strongly dependent on the solution pH. The Fenton-like reaction, charge carriers directly generated in the photo-excited MIL-53(Fe) and the synergistic effect of H_2O_2 were the main mechanisms. The formation of humic acids-like and fulvic acids-like organic matter in the degradation process was detected by 3D EMMs. MIL-53(Fe) also revealed excellent performance for the removal of CA and CBZ from real municipal wastewater and river water. Therefore, MIL-53(Fe) may be used as a promising photocatalytic adsorbent for wastewater purification.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.cej.2017.06.139DOIArticle
http://www.sciencedirect.com/science/article/pii/S1385894717310914PublisherArticle
Additional Information:© 2017 Elsevier B.V. Received 19 April 2017, Revised 23 June 2017, Accepted 24 June 2017, Available online 27 June 2017.
Subject Keywords:MIL-53(Fe); Adsorption; photocatalysis; Clofibric acid; Carbamazepine
Record Number:CaltechAUTHORS:20170628-105435986
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170628-105435986
Official Citation:Yanxin Gao, Gang Yu, Kai Liu, Shubo Deng, Bin Wang, Jun Huang, Yujue Wang, Integrated adsorption and visible-light photodegradation of aqueous clofibric acid and carbamazepine by a Fe-based metal-organic framework, Chemical Engineering Journal, Volume 330, 15 December 2017, Pages 157-165, ISSN 1385-8947, https://doi.org/10.1016/j.cej.2017.06.139. (http://www.sciencedirect.com/science/article/pii/S1385894717310914)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78646
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Jun 2017 18:01
Last Modified:04 Aug 2017 23:35

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