PMID- 25697692
OWN - NLM
STAT- MEDLINE
DCOM- 20151201
LR  - 20150315
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 73
DP  - 2015 Apr 15
TI  - UV-activated persulfate oxidation and regeneration of NOM-Saturated granular 
      activated carbon.
PG  - 304-10
LID - S0043-1354(15)00069-X [pii]
LID - 10.1016/j.watres.2015.01.040 [doi]
AB  - A new method of ultraviolet light (UV) activated persulfate (PS) oxidation was 
      investigated to regenerate granular activated carbon (GAC) in drinking water 
      applications. The improvements in iodine and methylene blue numbers measured in 
      the GAC after ultraviolet- (UV) activated persulfate suggested that the GAC 
      preloaded with natural organic matter (NOM) was chemically regenerated. An 
      experimental matrix for UV-activated persulfate regeneration included a range of 
      persulfate doses and different UV wavelengths. Over 87% of the initial iodine 
      number for GAC was restored under the optimum conditions, perfulfate dosage 60 
      g/L and UV exposure 1.75 x 10(4) mJ/cm(2). The persulfate dosages had little 
      effect on the recovery of the methylene blue number, which was approximately 65%. 
      Persulfate activation at 185 nm was superior to activation at 254 nm. UV 
      activation of persulfate in the presence of GAC produced acid, lowering the 
      solution pH. Higher persulfate concentrations and UV exposure resulted in greater 
      GAC regeneration. Typical organic and inorganic byproducts (e.g., benzene 
      compounds and sulfate ions) were measured as a component of treated water quality 
      safety. This study provides a proof-of-concept that can be used to optimize 
      pilot-scale and full-scale UV-activated persulfate for regeneration of 
      NOM-saturated GAC.
CI  - Copyright (c) 2015 Elsevier Ltd. All rights reserved.
FAU - An, Dong
AU  - An D
AD  - Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention 
      (LAP(3)), Department of Environmental Science & Engineering, Fudan University, 
      220 Handan Road, Shanghai 200433, PR China. Electronic address: 
      andong@fudan.edu.cn.
FAU - Westerhoff, Paul
AU  - Westerhoff P
AD  - School of Sustainable Engineering and The Built Environment, Ira A. Fulton 
      Schools of Engineering, Arizona State University, ISTB4 Room 362, Tempe, AZ 
      85287-5306, USA.
FAU - Zheng, Mengxin
AU  - Zheng M
AD  - Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention 
      (LAP(3)), Department of Environmental Science & Engineering, Fudan University, 
      220 Handan Road, Shanghai 200433, PR China.
FAU - Wu, Mengyuan
AU  - Wu M
AD  - Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention 
      (LAP(3)), Department of Environmental Science & Engineering, Fudan University, 
      220 Handan Road, Shanghai 200433, PR China.
FAU - Yang, Yu
AU  - Yang Y
AD  - School of Sustainable Engineering and The Built Environment, Ira A. Fulton 
      Schools of Engineering, Arizona State University, ISTB4 Room 362, Tempe, AZ 
      85287-5306, USA.
FAU - Chiu, Chao-An
AU  - Chiu CA
AD  - School of Sustainable Engineering and The Built Environment, Ira A. Fulton 
      Schools of Engineering, Arizona State University, ISTB4 Room 362, Tempe, AZ 
      85287-5306, USA.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20150207
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Humic Substances)
RN  - 0 (Sulfates)
RN  - 16291-96-6 (Charcoal)
SB  - IM
MH  - Charcoal/*chemistry/*radiation effects
MH  - Humic Substances/*analysis
MH  - Oxidation-Reduction
MH  - Sulfates/*chemistry
MH  - *Ultraviolet Rays
OTO - NOTNLM
OT  - Granular activated carbon
OT  - Persulfate
OT  - Regeneration
OT  - Ultraviolet
EDAT- 2015/02/24 06:00
MHDA- 2015/12/15 06:00
CRDT- 2015/02/21 06:00
PHST- 2014/10/28 00:00 [received]
PHST- 2015/01/23 00:00 [revised]
PHST- 2015/01/28 00:00 [accepted]
PHST- 2015/02/21 06:00 [entrez]
PHST- 2015/02/24 06:00 [pubmed]
PHST- 2015/12/15 06:00 [medline]
AID - S0043-1354(15)00069-X [pii]
AID - 10.1016/j.watres.2015.01.040 [doi]
PST - ppublish
SO  - Water Res. 2015 Apr 15;73:304-10. doi: 10.1016/j.watres.2015.01.040. Epub 2015 
      Feb 7.