PMID- 26897564 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20160711 LR - 20170725 IS - 1095-7103 (Electronic) IS - 0021-9797 (Linking) VI - 469 DP - 2016 May 1 TI - Oxidation of 2,4-dichlorophenol by non-radical mechanism using persulfate activated by Fe/S modified carbon nanotubes. PG - 277-286 LID - S0021-9797(16)30067-4 [pii] LID - 10.1016/j.jcis.2016.01.067 [doi] AB - The aim of this study was to develop a new approach for the activation of persulfate (PS) based on carbon nanotubes (CNTs). Fe/S modified carbon nanotubes (Fe/S-CNTs) were synthesized via impregnation-precipitation in the aqueous-phase synthesis method. The morphologies and chemical states of the catalysts were characterized and 2,4-dichlorophenol (2,4-DCP) was selected to investigate the degradation performance using Fe/S-CNTs with PS. The results reveal that the Fe/S-CNTs catalysts can significantly accelerate the removal of 2,4-DCP compared to single PS or PS/CNTs. The catalytic capacity is also enhanced by S modification and is affected by the solution pH. The iron loading content, PS concentration and catalyst dosage could play important roles in the degradation. A non-radical process of 2,4-DCP degradation is demonstrated for the first time in the results of the radical scavengers and chloride ionic, as well as persulfate decomposition. It is suggested that PS is first bonded with the sp(2)-hybridized system and activated by iron oxide particles and iron-sulfur complexes, then it reacts rapidly with the adsorbed 2,4-DCP. CI - Copyright (c) 2016 Elsevier Inc. All rights reserved. FAU - Cheng, Xin AU - Cheng X AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China. FAU - Guo, Hongguang AU - Guo H AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China; National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China. Electronic address: hgguo@scu.edu.cn. FAU - Zhang, Yongli AU - Zhang Y AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China. FAU - Liu, Yang AU - Liu Y AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China. FAU - Liu, Hongwei AU - Liu H AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China. FAU - Yang, Ying AU - Yang Y AD - College of Architecture and Environment, Sichuan University, Chengdu 610065, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160128 PL - United States TA - J Colloid Interface Sci JT - Journal of colloid and interface science JID - 0043125 OTO - NOTNLM OT - 2,4-Dichlorophenol OT - Carbon nanotubes OT - Fe/S modification OT - Non-radical OT - Persulfate oxidation EDAT- 2016/02/22 06:00 MHDA- 2016/02/22 06:01 CRDT- 2016/02/22 06:00 PHST- 2015/11/23 00:00 [received] PHST- 2016/01/25 00:00 [revised] PHST- 2016/01/28 00:00 [accepted] PHST- 2016/02/22 06:00 [entrez] PHST- 2016/02/22 06:00 [pubmed] PHST- 2016/02/22 06:01 [medline] AID - S0021-9797(16)30067-4 [pii] AID - 10.1016/j.jcis.2016.01.067 [doi] PST - ppublish SO - J Colloid Interface Sci. 2016 May 1;469:277-286. doi: 10.1016/j.jcis.2016.01.067. Epub 2016 Jan 28.