PMID- 29152696
OWN - NLM
STAT- MEDLINE
DCOM- 20181116
LR  - 20181116
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 25
IP  - 4
DP  - 2018 Feb
TI  - Degradation of the earthy and musty odorant 2,4,6-tricholoroanisole by persulfate 
      activated with iron of different valences.
PG  - 3435-3445
LID - 10.1007/s11356-017-0452-x [doi]
AB  - 2,4,6-Trichloroanisole (TCA) is an odorous compound that is often detected in tap 
      water and is difficult to be removed via water treatment. In this study, the 
      transformation efficiency of TCA in the presence of persulfate (PS) activated by 
      iron (Fe(2+), Fe(0), and Fe(3+)) was investigated for the first time. The effects 
      of the activator dosage, oxidant dosage, pH, dosing method, chelating agents, 
      humic acid, and temperature were evaluated. The degradation rate of TCA increased 
      with increasing PS dosages (0.12-0.48 mM) and initial Fe(2+) concentrations 
      (0.12-0.96 mM), while it decreased with higher Fe(2+) concentrations. Fe(2+)/PS 
      and Fe(0)/PS systems achieved their best TCA removal efficiency at pH 7 and 2.5, 
      respectively. According to the results of electron paramagnetic resonance (EPR), 
      the contribution of SO(4)(-)* to TCA degradation was much higher than that of 
      *OH. Gradual addition of Fe(2+) improved TCA degradation compared to single 
      addition. Citric acid (CA) promoted TCA degradation under Fe(2+)/PS at the 
      beginning of the reaction, but inhibited it after 10 min. 
      Ethylenediaminetetraacetic acid (EDTA) improved the TCA removal rate with an 
      EDTA/Fe(2+) molar ratio of 0.5:1, while it decreased it at higher EDTA/Fe(2+) 
      molar ratios. Oxalic acid (OA) negatively affected TCA degradation with 
      increasing OA/Fe(2+) molar ratios. Among all of the chelating agents, only CA 
      increased TCA degradation by Fe(0)/PS. Humic acid promoted TCA degradation by 
      Fe(2+)/PS at the proper dosage (1 mg/L). Under our specific conditions and over 
      the temperature ranging from 10 to 25  degrees C, no change was observed in the reaction 
      kinetics. It was found that 2,4,6-trichlorophenol (TCP) was the only detected 
      oxidation product. The presence of an Fe(2+)-Fe(3+) redox cycle in iron-activated 
      PS systems was confirmed by TCA degradation under the Fe(3+)/PS system.
FAU - Zhang, Kejia
AU  - Zhang K
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China.
AD  - Xiamen Urban Water Environmental Eco-Planning and Remediation Engineering 
      Research Center, Xiamen, Fujian, 361021, China.
FAU - Zhou, Xinyan
AU  - Zhou X
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China.
FAU - Zhang, Tuqiao
AU  - Zhang T
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China.
FAU - Yu, Lang
AU  - Yu L
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China.
FAU - Qian, Zheming
AU  - Qian Z
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China.
FAU - Liao, Wenchao
AU  - Liao W
AD  - School of Environmental Science and Engineering, Xiamen University of Technology, 
      Xiamen, Fujian, 361024, China.
FAU - Li, Cong
AU  - Li C
AUID- ORCID: 0000-0003-0020-4663
AD  - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 
      Zhejiang, 310058, China. congil@zju.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20171119
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Anisoles)
RN  - 0 (Chelating Agents)
RN  - 0 (Humic Substances)
RN  - 0 (Sulfates)
RN  - 0 (Water Pollutants, Chemical)
RN  - 31O3X41254 (2,4,6-trichloroanisole)
RN  - E1UOL152H7 (Iron)
SB  - IM
MH  - Anisoles/chemistry/*metabolism
MH  - Chelating Agents
MH  - Humic Substances
MH  - Hydrogen-Ion Concentration
MH  - Iron/*chemistry
MH  - Kinetics
MH  - *Odorants/analysis
MH  - Oxidation-Reduction
MH  - Sulfates/*chemistry
MH  - Water Pollutants, Chemical/analysis/*isolation & purification
MH  - Water Purification/*methods
OTO - NOTNLM
OT  - 2,4,6-trichloroanisole
OT  - Chelating agent
OT  - Iron
OT  - Persulfate
OT  - Sulfate radical
EDAT- 2017/11/21 06:00
MHDA- 2018/11/18 06:00
CRDT- 2017/11/21 06:00
PHST- 2017/06/15 00:00 [received]
PHST- 2017/10/09 00:00 [accepted]
PHST- 2017/11/21 06:00 [pubmed]
PHST- 2018/11/18 06:00 [medline]
PHST- 2017/11/21 06:00 [entrez]
AID - 10.1007/s11356-017-0452-x [pii]
AID - 10.1007/s11356-017-0452-x [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2018 Feb;25(4):3435-3445. doi: 
      10.1007/s11356-017-0452-x. Epub 2017 Nov 19.