PMID- 38521258
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240423
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 926
DP  - 2024 May 20
TI  - Uranium accumulation in environmentally relevant microplastics and agricultural 
      soil at acidic and circumneutral pH.
PG  - 171834
LID - S0048-9697(24)01977-6 [pii]
LID - 10.1016/j.scitotenv.2024.171834 [doi]
AB  - The co-occurrence of microplastics (MPs) with potentially toxic metals in the 
      environment stresses the need to address their physicochemical interactions and 
      the potential ecological and human health implications. Here, we investigated the 
      reaction of aqueous U with agricultural soil and high-density polyethylene (HDPE) 
      through the integration of batch experiments, microscopy, and spectroscopy. The 
      aqueous initial concentration of U (100 muM) decreased between 98.6 and 99.2 % at 
      pH 5 and between 86.2 and 98.9 % at pH 7.5 following the first half hour of 
      reaction with 10 g of soil. In similar experimental conditions but with added 
      HDPE, aqueous U decreased between 98.6 and 99.7 % at pH 5 and between 76.1 and 
      95.2 % at pH 7.5, suggesting that HDPE modified the accumulation of U in soil as 
      a function of pH. Uranium-bearing precipitates on the cracked surface of HDPE 
      were identified by SEM/EDS after two weeks of agitation in water at both pH 5 and 
      7.5. Accumulation of U on the near-surface region of reacted HDPE was confirmed 
      by XPS. Our findings suggest that the precipitation of U was facilitated by the 
      weathering of the surface of HDPE. These results provide insights about 
      surface-mediated reactions of aqueous metals with MPs, contributing relevant 
      information about the mobility of metals and MPs at co-contaminated agricultural 
      sites.
CI  - Copyright (c) 2024 Elsevier B.V. All rights reserved.
FAU - Miller, Casey
AU  - Miller C
AD  - Gerald May Department of Civil, Construction & Environmental Engineering, MSC01 
      1070, University of New Mexico, Albuquerque, NM 87131, USA; Department of 
      Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of 
      Pharmacy, Albuquerque, NM 87131, USA.
FAU - Neidhart, Andrew
AU  - Neidhart A
AD  - Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, 
      College of Pharmacy, Albuquerque, NM 87131, USA; Department of Chemistry and 
      Chemical Biology, MSC03 2060, University of New Mexico, Albuquerque, NM 87131, 
      USA.
FAU - Hess, Kendra
AU  - Hess K
AD  - School of Civil and Environmental Engineering, EN0059, Oklahoma State University, 
      Stillwater, OK 740784, USA.
FAU - Ali, Abdul-Mehdi S
AU  - Ali AS
AD  - Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, 
      Albuquerque, NM 87131, USA.
FAU - Benavidez, Angelica
AU  - Benavidez A
AD  - Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM, 
      USA.
FAU - Spilde, Michael
AU  - Spilde M
AD  - Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, 
      Albuquerque, NM 87131, USA.
FAU - Peterson, Eric
AU  - Peterson E
AD  - Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, 
      Albuquerque, NM 87131, USA.
FAU - Brearley, Adrian
AU  - Brearley A
AD  - Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, 
      Albuquerque, NM 87131, USA.
FAU - Wang, Xuewen
AU  - Wang X
AD  - School of Civil and Environmental Engineering, EN0059, Oklahoma State University, 
      Stillwater, OK 740784, USA.
FAU - Dhanapala, B Dulani
AU  - Dhanapala BD
AD  - College of Engineering, Architecture, and Technology, Oklahoma State University, 
      Stillwater, OK 740784, USA.
FAU - Cerrato, Jose M
AU  - Cerrato JM
AD  - Gerald May Department of Civil, Construction & Environmental Engineering, MSC01 
      1070, University of New Mexico, Albuquerque, NM 87131, USA.
FAU - Gonzalez-Estrella, Jorge
AU  - Gonzalez-Estrella J
AD  - School of Civil and Environmental Engineering, EN0059, Oklahoma State University, 
      Stillwater, OK 740784, USA.
FAU - El Hayek, Eliane
AU  - El Hayek E
AD  - Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, 
      College of Pharmacy, Albuquerque, NM 87131, USA. Electronic address: 
      eelhayek@salud.unm.edu.
LA  - eng
GR  - P42 ES025589/ES/NIEHS NIH HHS/United States
GR  - P50 MD015706/MD/NIMHD NIH HHS/United States
PT  - Journal Article
DEP - 20240321
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - Agricultural soil
OT  - Microplastics
OT  - Precipitation
OT  - Surface chemistry
OT  - Uranium
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- 2024/03/24 00:42
MHDA- 2024/03/24 00:43
CRDT- 2024/03/23 20:39
PHST- 2024/01/12 00:00 [received]
PHST- 2024/03/08 00:00 [revised]
PHST- 2024/03/18 00:00 [accepted]
PHST- 2024/03/24 00:43 [medline]
PHST- 2024/03/24 00:42 [pubmed]
PHST- 2024/03/23 20:39 [entrez]
AID - S0048-9697(24)01977-6 [pii]
AID - 10.1016/j.scitotenv.2024.171834 [doi]
PST - ppublish
SO  - Sci Total Environ. 2024 May 20;926:171834. doi: 10.1016/j.scitotenv.2024.171834. 
      Epub 2024 Mar 21.