PMID- 29494973
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180523
LR  - 20180523
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 630
DP  - 2018 Jul 15
TI  - Biotic phase micropollutant distribution in horizontal sub-surface flow 
      constructed wetlands.
PG  - 648-657
LID - S0048-9697(18)30641-7 [pii]
LID - 10.1016/j.scitotenv.2018.02.242 [doi]
AB  - The distribution of micropollutants in biotic phases of horizontal sub-surface 
      flow (HSSF) constructed wetlands was investigated. 88 diverse micropollutants 
      (personal care products, pharmaceuticals and illicit drugs) were monitored for in 
      full-scale HSSF steel slag and gravel beds to assess their fate and behaviour 
      during tertiary wastewater treatment. Of the studied micropollutants 54 were 
      found in receiving and treated wastewaters. Treatment reduced concentrations of 
      several micropollutants by >50% (removal range -112% to 98%) and resulted in 
      changes to the stereo-isomeric composition of chiral species. For example, 
      stereo-selective changes were observed for 3,4-methylenedioxymethamphetamine 
      (MDMA) and atenolol during HSSF constructed wetland treatment for the first time. 
      Analysis of sludge present within the HSSF beds found 37 micropollutants to be 
      present. However, concentrations for the majority of these micropollutants were 
      not considered high enough to suggest partitioning into sludge was a contributing 
      mechanism of removal. Nevertheless the preservative methylparaben was found at 
      2772mgbed(-1). Its daily removal from wastewater of 3.4mgd(-1) indicates 
      partitioning and accumulation in sludge contributes to its removal. Other 
      micropollutants found at high levels in sludge (relative to their overall 
      removals) were the antidepressants sertraline and fluoxetine, and the metabolite 
      desmethylcitalopram. Furthermore, process balances indicated uptake and 
      metabolism by Phragmites australis (Cav.) Trin. ex Steud did not contribute 
      significantly to micropollutant removal. However analysis of plant tissues 
      evidenced uptake, metabolism and accumulation of recalcitrant micropollutants 
      such as ketamine and carbamazepine. It is considered that the rate of uptake was 
      too slow to have a notable impact on removal at the 14h hydraulic retention time. 
      Despite evidence of other removal mechanisms at play (e.g., partitioning into 
      sludge and plant uptake), findings indicate biodegradation is the dominant 
      mechanism of micropollutant removal in HSSF constructed wetlands.
CI  - Copyright (c) 2018. Published by Elsevier B.V.
FAU - Petrie, Bruce
AU  - Petrie B
AD  - Department of Chemistry, University of Bath, Bath BA2 7AY, UK; Water Innovation & 
      Research Centre (WIRC), University of Bath, Bath BA2 7AY, UK; School of Pharmacy 
      and Life Sciences, Robert Gordon University, Aberdeen AB10 7GJ, UK.
FAU - Rood, Shawn
AU  - Rood S
AD  - Department of Chemistry, University of Bath, Bath BA2 7AY, UK; Centre for 
      Doctoral Training in Sustainable Chemical Technologies, University of Bath, Bath 
      BA2 7AY, UK.
FAU - Smith, Benjamin D
AU  - Smith BD
AD  - Department of Chemistry, University of Bath, Bath BA2 7AY, UK.
FAU - Proctor, Kathryn
AU  - Proctor K
AD  - Department of Chemistry, University of Bath, Bath BA2 7AY, UK; Water Innovation & 
      Research Centre (WIRC), University of Bath, Bath BA2 7AY, UK.
FAU - Youdan, Jane
AU  - Youdan J
AD  - Wessex Water, Bath BA2 7WW, UK.
FAU - Barden, Ruth
AU  - Barden R
AD  - Wessex Water, Bath BA2 7WW, UK.
FAU - Kasprzyk-Hordern, Barbara
AU  - Kasprzyk-Hordern B
AD  - Department of Chemistry, University of Bath, Bath BA2 7AY, UK; Water Innovation & 
      Research Centre (WIRC), University of Bath, Bath BA2 7AY, UK. Electronic address: 
      b.kasprzyk-hordern@bath.ac.uk.
LA  - eng
PT  - Journal Article
DEP - 20180227
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
OTO - NOTNLM
OT  - Chiral
OT  - Micropollutant
OT  - Pharmaceutical
OT  - Plant
OT  - Reeds
OT  - Wastewater
EDAT- 2018/03/02 06:00
MHDA- 2018/03/02 06:01
CRDT- 2018/03/02 06:00
PHST- 2017/12/12 00:00 [received]
PHST- 2018/01/30 00:00 [revised]
PHST- 2018/02/19 00:00 [accepted]
PHST- 2018/03/02 06:00 [pubmed]
PHST- 2018/03/02 06:01 [medline]
PHST- 2018/03/02 06:00 [entrez]
AID - S0048-9697(18)30641-7 [pii]
AID - 10.1016/j.scitotenv.2018.02.242 [doi]
PST - ppublish
SO  - Sci Total Environ. 2018 Jul 15;630:648-657. doi: 10.1016/j.scitotenv.2018.02.242. 
      Epub 2018 Feb 27.