TY - JOUR
T1 - Hydrophilic divinylbenzene for equilibrium sorption of emerging organic contaminants in aquatic matrices
AU - Huysman, Steve
AU - Vanryckeghem, Francis
AU - De Paepe, Ellen
AU - Smedes, Foppe
AU - Haughey, Simon A
AU - Elliott, Christopher T
AU - Demeestere, Kristof
AU - Vanhaecke, Lynn
PY - 2019/8/4
Y1 - 2019/8/4
N2 - Hydrophilic divinylbenzene (DVB) (Bakerbond™) has surfaced as a promising sorbent for active sampling of analytes from aqueous matrices over a very broad polarity range. Given this, hydrophilic DVB may likewise offer potential for passive sampling, if sorbent-water partitioning coefficients (Ksw) were to be available. In this work, static exposure batch experiments were performed to quantitatively study the equilibrium sorption of 131 environmentally relevant organic contaminants (P values ranging from -1.30 to 9.85) on hydrophilic DVB. The superior affinity of hydrophilic DVB for compounds with a broad polarity range was confirmed by functional FTIR and Raman characterization, demonstrating the presence of carboxyl moieties. Concentration effects were studied by increasing compound concentrations in mixture experiments, and resulted for the steroidal EDCs in higher Ksw, while lower Ksw were obtained for the (alkyl)phenols, personal care products, pesticides, pharmaceuticals and phthalates. Nevertheless, Ksw remained constant in said design for equilibrium water concentrations at environmentally relevant seawater levels. Analysis of thermodynamic parameters (change in enthalpy, entropy and Gibbs free energy) revealed the nature of the main partitioning processes. While polar (log P < 4) compounds were mainly served by physisorption, non-polar (log P > 4) compounds also exhibited binding by chemisorption. In conclusion, this research facilitates the future application of hydrophilic DVB for active as well as passive sampling in the analysis of organic contaminants for monitoring purposes but also for toxicity testing.
AB - Hydrophilic divinylbenzene (DVB) (Bakerbond™) has surfaced as a promising sorbent for active sampling of analytes from aqueous matrices over a very broad polarity range. Given this, hydrophilic DVB may likewise offer potential for passive sampling, if sorbent-water partitioning coefficients (Ksw) were to be available. In this work, static exposure batch experiments were performed to quantitatively study the equilibrium sorption of 131 environmentally relevant organic contaminants (P values ranging from -1.30 to 9.85) on hydrophilic DVB. The superior affinity of hydrophilic DVB for compounds with a broad polarity range was confirmed by functional FTIR and Raman characterization, demonstrating the presence of carboxyl moieties. Concentration effects were studied by increasing compound concentrations in mixture experiments, and resulted for the steroidal EDCs in higher Ksw, while lower Ksw were obtained for the (alkyl)phenols, personal care products, pesticides, pharmaceuticals and phthalates. Nevertheless, Ksw remained constant in said design for equilibrium water concentrations at environmentally relevant seawater levels. Analysis of thermodynamic parameters (change in enthalpy, entropy and Gibbs free energy) revealed the nature of the main partitioning processes. While polar (log P < 4) compounds were mainly served by physisorption, non-polar (log P > 4) compounds also exhibited binding by chemisorption. In conclusion, this research facilitates the future application of hydrophilic DVB for active as well as passive sampling in the analysis of organic contaminants for monitoring purposes but also for toxicity testing.
U2 - 10.1021/acs.est.9b01814
DO - 10.1021/acs.est.9b01814
M3 - Article
C2 - 31378062
SN - 0013-936X
JO - Environmental science & technology
JF - Environmental science & technology
ER -