TY - JOUR
T1 - Contribution of inorganic and organic components to sorption of neutral and ionizable pharmaceuticals by sediment/soil
AU - Yamamoto, Hiroshi
AU - Takemoto, Kohei
AU - Tamura, Ikumi
AU - Shin-oka, Norihiro
AU - Nakano, Takahiro
AU - Nishida, Masayo
AU - Honda, Yuta
AU - Moriguchi, Shigemi
AU - Nakamura, Yudai
N1 - Publisher Copyright:
© 2016, Springer-Verlag Berlin Heidelberg.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Our previous study showed that the sorption coefficient of certain polar pharmaceuticals to river sediment, especially particular amines, was unexpectedly high. Thus, we conducted sorption experiments of selected polar pharmaceuticals and pyrene derivatives, including amines, carboxylic acids, and neutral compounds, to model clay minerals, i.e., montmorillonite and kaolin, in addition to silica sands and humic substances. The contribution of each component was roughly estimated by simple fractionation of the individual sorption coefficients. Relatively high sorption coefficients (Kd values) were found, especially for amines on clay minerals, which suggest that electrochemical affinity may play an important role. The estimated contribution percentage suggests a relatively large contribution from inorganic constituents, such as clay minerals, for silt loam soil; in contrast, organic components predominantly contribute for sandy river sediments. These findings could be the key to understanding not only the fate and transport but also bioavailability and environmental risks of pharmaceuticals, which are mostly polar and/or ionizable.
AB - Our previous study showed that the sorption coefficient of certain polar pharmaceuticals to river sediment, especially particular amines, was unexpectedly high. Thus, we conducted sorption experiments of selected polar pharmaceuticals and pyrene derivatives, including amines, carboxylic acids, and neutral compounds, to model clay minerals, i.e., montmorillonite and kaolin, in addition to silica sands and humic substances. The contribution of each component was roughly estimated by simple fractionation of the individual sorption coefficients. Relatively high sorption coefficients (Kd values) were found, especially for amines on clay minerals, which suggest that electrochemical affinity may play an important role. The estimated contribution percentage suggests a relatively large contribution from inorganic constituents, such as clay minerals, for silt loam soil; in contrast, organic components predominantly contribute for sandy river sediments. These findings could be the key to understanding not only the fate and transport but also bioavailability and environmental risks of pharmaceuticals, which are mostly polar and/or ionizable.
KW - Cation-exchange capacity
KW - Clay minerals
KW - Electrochemical affinity
KW - Pharmaceuticals
KW - Sediment
KW - Sorption
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U2 - 10.1007/s11356-016-6471-1
DO - 10.1007/s11356-016-6471-1
M3 - Article
C2 - 27005278
AN - SCOPUS:84961855240
VL - 25
SP - 7250
EP - 7261
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
SN - 0944-1344
IS - 8
ER -