PMID- 37690561
OWN - NLM
STAT- Publisher
LR  - 20230928
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 342
DP  - 2023 Nov
TI  - Lead (Pb) deposition onto new and biofilm-laden potable water pipes.
PG  - 140135
LID - S0045-6535(23)02405-0 [pii]
LID - 10.1016/j.chemosphere.2023.140135 [doi]
AB  - Heavy metals' interactions with plumbing materials are complicated due to the 
      differential formation of biofilms within pipes that can modulate, transform, 
      and/or sequester heavy metals. This research aims to elucidate the mechanistic 
      role of biofilm presence on Lead (Pb) accumulation onto crosslinked polyethylene 
      (PEX-A), high-density polyethylene (HDPE), and copper potable water pipes. For 
      this purpose, biofilms were grown on new pipes for three months. Five-day Pb 
      exposure experiments were conducted to examine the kinetics of Pb accumulation 
      onto the new and biofilm-laden pipes. Additionally, the influence of Pb initial 
      concentration on the rate of its accumulation onto the pipes was examined. The 
      results revealed greater biofilm biomass on the PEX-A pipes compared to the 
      copper and HDPE pipes. More negative zeta potential was found for the 
      biofilm-laden plastic pipes compared to the new plastic pipes. After five days of 
      Pb exposure under stagnant conditions, the biofilm-laden PEX-A (980 mug m(-2)) and 
      HDPE (1170 mug m(-2)) pipes accumulated more than three times the Pb surface 
      loading compared to the new PEX-A (265 mug m(-2)) and HDPE pipes (329 mug m(-2)), 
      respectively. However, under flow conditions, Pb accumulation on biofilm-laden 
      plastic pipes was lower than on the new pipes. Moreover, with increasing the 
      initial Pb concentration, greater rates of Pb surface accumulation were found for 
      the biofilm-laden pipes compared to the new pipes under stagnant conditions. 
      First-order kinetics model best described the Pb accumulation onto both new and 
      biofilm-laden water pipes under both stagnant and flow conditions.
CI  - Copyright (c) 2023 Elsevier Ltd. All rights reserved.
FAU - Hadiuzzaman, Md
AU  - Hadiuzzaman M
AD  - Department of Civil Engineering, The University of Memphis, Memphis, TN, USA.
FAU - Mirza, Nahreen
AU  - Mirza N
AD  - Department of Biological Sciences, The University of Memphis, Memphis, TN, USA.
FAU - Brown, Shawn P
AU  - Brown SP
AD  - Department of Biological Sciences, The University of Memphis, Memphis, TN, USA.
FAU - Ladner, David A
AU  - Ladner DA
AD  - Department of Environmental Engineering and Earth Sciences, Clemson University, 
      Anderson, SC, USA.
FAU - Salehi, Maryam
AU  - Salehi M
AD  - Department of Civil and Environmental Engineering, University of Missouri, 
      Columbia, MO, USA. Electronic address: mshfp@missouri.edu.
LA  - eng
PT  - Journal Article
DEP - 20230908
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
SB  - IM
OTO - NOTNLM
OT  - Biofilm
OT  - Heavy metals
OT  - Lead
OT  - Plastic pipes
OT  - Tap water quality
OT  - Zeta potential
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/09/11 00:42
MHDA- 2023/09/11 00:42
CRDT- 2023/09/10 19:24
PHST- 2023/05/16 00:00 [received]
PHST- 2023/09/06 00:00 [revised]
PHST- 2023/09/07 00:00 [accepted]
PHST- 2023/09/11 00:42 [pubmed]
PHST- 2023/09/11 00:42 [medline]
PHST- 2023/09/10 19:24 [entrez]
AID - S0045-6535(23)02405-0 [pii]
AID - 10.1016/j.chemosphere.2023.140135 [doi]
PST - ppublish
SO  - Chemosphere. 2023 Nov;342:140135. doi: 10.1016/j.chemosphere.2023.140135. Epub 
      2023 Sep 8.