In this section
@article{Liu:2020:10.1021/acs.est.9b07773,
author = {Liu, F and Tan, Q-G and Weiss, D and Crémazy, A and Fortin, C and Campbell, PGC},
doi = {10.1021/acs.est.9b07773},
journal = {Environmental Science and Technology (Washington)},
pages = {8177--8185},
title = {Unravelling metal speciation in the microenvironment surrounding phytoplankton cells to improve predictions of metal bioavailability.},
url = {http://dx.doi.org/10.1021/acs.est.9b07773},
volume = {54},
year = {2020}
}
TY - JOUR
AB - A lack of knowledge on metal speciation in the microenvironment surrounding phytoplankton cells (i.e., the phycosphere) represents an impediment to accurately predicting metal bioavailability. Phycosphere pH and O2 concentrations from a diversity of algae species were compiled. For marine algae in the light, the average increases were 0.32 pH units and 0.17 mM O2 in the phycosphere, whereas in the dark the average decreases were 0.10 pH units and 0.03 mM O2, in comparison to bulk seawater. In freshwater algae, the phycosphere pH increased by 1.28 units, whereas O2 increased by 0.38 mM in the light. Equilibrium modeling showed that the pH alteration influenced the chemical species distribution (i.e., free ion, inorganic complexes, and organic complexes) of Al, Cd, Co, Cu, Fe, Hg, Mn, Ni, Pb, Sc, Sm, and Zn in the phycosphere, and the O2 fluctuation increased oxidation rates of Cu(I), Fe(II) and Mn(II) from 2 to 938-fold. The pH/O2-induced changes in phycosphere metal chemistry were larger for freshwater algae than for marine species. Reanalyses of algal metal uptake data in the literature showed that uptake of the trivalent metals (Sc, Sm and Fe), in addition to divalent metals, can be better predicted after considering the phycosphere chemistry.
AU - Liu,F
AU - Tan,Q-G
AU - Weiss,D
AU - Crémazy,A
AU - Fortin,C
AU - Campbell,PGC
DO - 10.1021/acs.est.9b07773
EP - 8185
PY - 2020///
SN - 0013-936X
SP - 8177
TI - Unravelling metal speciation in the microenvironment surrounding phytoplankton cells to improve predictions of metal bioavailability.
T2 - Environmental Science and Technology (Washington)
UR - http://dx.doi.org/10.1021/acs.est.9b07773
UR - https://www.ncbi.nlm.nih.gov/pubmed/32539359
UR - https://pubs.acs.org/doi/10.1021/acs.est.9b07773
VL - 54
ER -
Climate Science
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