PMID- 36976468
OWN - NLM
STAT- MEDLINE
DCOM- 20230510
LR  - 20230510
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 30
IP  - 20
DP  - 2023 Apr
TI  - Investigating the combined effects of pH changes and UV radiation exposure on 
      dissolved metal-humate complexes: an important process in aquatic systems.
PG  - 58189-58199
LID - 10.1007/s11356-023-26178-z [doi]
AB  - An in vitro study was carried out to examine the impact of UV exposure on 
      metal-dissolved humic material (M-DHM) complexes in aqueous systems at different 
      pH. Complexation reactions of dissolved M (Cu, Ni, and Cd) with DHM increased 
      with the increasing pH of the solution. Kinetically inert M-DHM complexes 
      dominated at higher pH in the test solutions. Exposure to UV radiation did affect 
      the chemical speciation of M-DHM complexes at different pH of the systems. The 
      overall observation suggests that exposure to increasing UV radiation increased 
      the lability, mobility, and bioavailability of M-DHM complexes in aquatic 
      environments. The dissociation rate constant of Cu-DHM was found to be slower 
      than Ni-DHM and Cd-DHM complexes (both before and after UV exposure). At a higher 
      pH range, Cd-DHM complexes dissociated after exposure to UV radiation and a part 
      of this dissociated Cd precipitated out from the system. No change in the 
      lability of the produced Cu-DHM and Ni-DHM complexes after UV radiation exposure 
      was observed. They did not appear to form new kinetically inert complexes even 
      after 12 h of exposure. The outcome of this research has important global 
      implications. The results of this study helped to understand DHM leachability 
      from soil and its effect on dissolved metal concentrations in the Northern 
      Hemisphere water bodies. The results of this study also facilitated to comprehend 
      the fate of M-DHM complexes at photic depths (where pH changes are accompanied by 
      high UV radiation exposure) in tropical marine/freshwater systems during summer.
CI  - (c) 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, 
      part of Springer Nature.
FAU - Chakraborty, Parthasarathi
AU  - Chakraborty P
AD  - Marine Trace Metal Biogeochemistry Laboratory, The Centre for Ocean, River, 
      Atmosphere and Land Sciences (CORAL), Indian Institute of Technology, Kharagpur, 
      West Bengal, 721302, India. pchak@coral.iitkgp.ac.in.
FAU - Manek, Aditya
AU  - Manek A
AD  - Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, 
      Canada.
FAU - Chakraborty, Sucharita
AU  - Chakraborty S
AD  - Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, 
      West Bengal, 721302, India.
FAU - Hudson, Jeff
AU  - Hudson J
AD  - Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, 
      Canada.
FAU - Niyogi, Som
AU  - Niyogi S
AD  - Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, 
      Canada.
AD  - Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
LA  - eng
GR  - (Project Code: CFT)/Sponsored Research and Industrial Consultancy/
GR  - Project Code :TEE/MOES/
GR  - Discovery Grants/NSERC/
PT  - Journal Article
DEP - 20230328
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Coordination Complexes)
RN  - 00BH33GNGH (Cadmium)
RN  - 0 (Humic Substances)
SB  - IM
MH  - *Coordination Complexes
MH  - Cadmium
MH  - Humic Substances/analysis
MH  - Hydrogen-Ion Concentration
MH  - *Radiation Exposure
OTO - NOTNLM
OT  - Humic substances
OT  - Lability
OT  - Trace metal
OT  - UV-Photobleaching, Kinetic speciation
EDAT- 2023/03/29 06:00
MHDA- 2023/05/10 06:42
CRDT- 2023/03/28 11:22
PHST- 2022/09/14 00:00 [received]
PHST- 2023/02/24 00:00 [accepted]
PHST- 2023/05/10 06:42 [medline]
PHST- 2023/03/29 06:00 [pubmed]
PHST- 2023/03/28 11:22 [entrez]
AID - 10.1007/s11356-023-26178-z [pii]
AID - 10.1007/s11356-023-26178-z [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2023 Apr;30(20):58189-58199. doi: 
      10.1007/s11356-023-26178-z. Epub 2023 Mar 28.