Influence of dissolved humic acid on hydrophobic chemical uptake in juvenile rainbow trout

Qiao, Peiwen; Farrell, Anthony P.

doi:10.1016/s1532-0456(02)00178-3

Cited by 17 publications

(17 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The extracted SPE cartridges showed a little brown staining that would indicate adsorption or coextrac- tion of DOM-associated chemicals. This finding is in agreement with Qiao et al [30], who found that the SPE method used for water samples in this study reflected both freely dissolved and parts of the DOM-associated chemicals. It is noteworthy that although the field exposed TECAM samples were somewhat dirty having a pale yellow coloration, the chromatograms obtained showed well-resolved peaks with no obvious interferences even though the samples were not subjected to any cleanup procedure.…”

Section: Application To Field Samplingsupporting

confidence: 94%

Accurate quantification of freely dissolved organochlorine pesticides in water in the presence of dissolved organic matter using triolein-embedded cellulose acetate membrane

Wang

Huang

et al. 2007

Anal Bioanal Chem

View full text Add to dashboard Cite

A novel method is described using trioleinembedded cellulose acetate membrane (TECAM) for accurate determination of the freely dissolved fraction of organochlorine pesticides (OCPs) in waters rich in dissolved organic matter (DOM). The performance of the method was tested with an air-bridge system for extracting OCPs from aqueous solutions with and without humic acid. In addition, the partition coefficients between humic acid and water (K doc s) for 20 OCPs were determined by TECAM with negligible depletion extraction. Results show that TECAM predominantly extracts the freely dissolved compounds and its extraction efficiency decreases significantly with an increase in concentration of humic acid in water. The proposed methodology is suitable for facile laboratory K doc measurement for moderate to high hydrophobic compounds (logK ow >4). The linear relationship between logK ow and logK doc obtained in this study agrees well with the results reported earlier. The kinetic uptake rate constants (k u s) and TECAM-water partition coefficients (K TECAM s) for the 20 OCPs were obtained using the controlled laboratory continuous-flow and static exposure system, respectively. These calibration parameters were used in the field experiment to estimate the freely dissolved concentrations of OCPs in the water of Taihu Lake in China. Our results show that TECAM can be used successfully to determine the freely dissolved OCPs in aquatic environments containing DOM, and the method is particularly suited for long-term water sampling.

show abstract

Section: Application To Field Samplingsupporting

confidence: 94%

Accurate quantification of freely dissolved organochlorine pesticides in water in the presence of dissolved organic matter using triolein-embedded cellulose acetate membrane

Wang

Huang

et al. 2007

Anal Bioanal Chem

View full text Add to dashboard Cite

show abstract

“…Most of the studies have shown decrease in bioconcentration in the presence of DOM. However, enhancement of the bioconcentration of organic compounds due to DOM has also been found in many studies (Muir et al 1994;Qiao and Farrell 2002). Haitzer et al (1998) compiled data from 27 studies dealing with effects of DOM on the bioconcentration of organic chemicals in aquatic Decrease in bioavailability of E2 by DOM has been reported.…”

Section: Influence On the Action Of E2 By Dommentioning

confidence: 99%

Estrogenic effects of dissolved organic matter and its impact on the activity of 17β-estradiol

Chen

Shen

Tang

et al. 2011

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…The change of DOC along the wetland corresponded well to the change of TSPs (Table 1). The concentrations of contaminants in filtered water (C dissolved ) were detected by solid-phase extraction method, which included freely dissolved (f free ) and DOC-bound (f DOC ) fractions (Qiao and Farrell 2002;Qiao et al 2008). Mean concentrations of PAHs, OCPs, and NPs in filtered water were summarized in Table 2.…”

Section: Concentrations and Distribution Of Pahs Ocps And Nps In Thmentioning

confidence: 99%

Impacts of particulate organic carbon and dissolved organic carbon on removal of polycyclic aromatic hydrocarbons, organochlorine pesticides, and nonylphenols in a wetland

Luo

Cao

et al. 2009

J Soils Sediments

View full text Add to dashboard Cite

Background, aim, and scope The potential of wetlands for controlling point-and nonpoint-source pollution in surface water has attracted increasing interest. The partitioning process of organic contaminants between water, particulate organic carbon (POC) and dissolved organic carbon (DOC), impacts their behaviors in the aquatic environments. Meantime, the partitioning process of organic contaminants is closely related to their physicochemical properties, such as hydrophobicity (or K ow ), and their fates in wetlands may vary greatly depending on physicochemical properties. The aim of this study was to examine fates and removals of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and nonylphenols (NPs) in a wetland in Beijing, China, and provide useful information for ecological remediation. Materials and methods Water samples, collected at five sites from inlet to outlet of the wetland once a month in summer 2006, were immediately filtered within 2 days through 0.45-μm glass fiber prefilters and enriched by solid-phase extraction. The filtered particulates were collected as the total suspended particulates (TSPs), freeze-dried, and Soxhletextracted. After extraction, samples were purified following a clean-up procedure and analyzed by GC-MS.Results TSPs could be removed efficiently with a removal rate of 97.4%, and DOC could be moderately removed with a removal rate of 44.7% from inlet to outlet. The total removals of target contaminants varied widely from null to 82.0%. A good correlation between logK ow and logK oc (organic-carbon-normalized suspended-particulate partition coefficient) was observed (r 2 =0.84 for PAHs and r 2 =0.86 for OCPs, p<0.01). Ratios of the POC-bound fraction of target contaminants (or DOC-bound fraction) to the freely dissolved fraction increased with their K ow values. The removal of the POC fraction contributed more than 50% to the total removal for the contaminants with logK ow >5.0. Only a small portion of the removal was attributed to the removal of the freely dissolved fraction. Discussion Hydrophobic compounds such as PAHs and OCPs with higher K ow values would show stronger POC or DOC preference. Their removal depended greatly on their K ow values and the removal of total suspended particulates. On the other hand, concentrations of NPs decreased little in the wetland, probably due to their production through degradation of their precursors and relatively low hydrophobicity. Conclusions POC and DOC play essential roles on the fates and removals of hydrophobic organic contaminants in the wetland. The removal of target contaminants with a high K ow should be mainly through association with the suspended particulates which were precipitated and retained in the wetland. The fates of the organic contaminants in the wetland greatly depended on their hydrophobicities. Recommendations and perspectives Further work should be done to study the influence of hydraulic retention time and some other environmental factors, e.g., temperature, on removals and fate...

show abstract

Influence of dissolved humic acid on hydrophobic chemical uptake in juvenile rainbow trout

Cited by 17 publications

References 31 publications

Accurate quantification of freely dissolved organochlorine pesticides in water in the presence of dissolved organic matter using triolein-embedded cellulose acetate membrane

Accurate quantification of freely dissolved organochlorine pesticides in water in the presence of dissolved organic matter using triolein-embedded cellulose acetate membrane

Estrogenic effects of dissolved organic matter and its impact on the activity of 17β-estradiol

Impacts of particulate organic carbon and dissolved organic carbon on removal of polycyclic aromatic hydrocarbons, organochlorine pesticides, and nonylphenols in a wetland

Contact Info

Product

Resources

About