Effect of pH on binding of pyrene to hydrophobic fractions of dissolved organic matter (DOM) isolated from lake water

Yi, Myeong‐Jong; Bai, Yingchen; Wang, Liying

doi:10.1007/s11631-016-0094-6

Cited by 22 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen, this study showed that the binding capacity was higher for the HA from compost and for more hydrophobic ligands. Similar results about the role played by the hydrophobic interaction were reported by Mei et al [92], that investigated the binding of pyrene to HA; they observed that the partitioning coefficients (K DOC ) decreased by increasing the pH (Table 2).…”

Section: Interaction Of Organic Pollutants With Dissolved Humic Acidssupporting

confidence: 86%

Sorption of Organic Pollutants by Humic Acids: A Review

et al. 2020

View full text Add to dashboard Cite

Humic acids (HA) are promising green materials for water and wastewater treatment. They show a strong ability to sorb cationic and hydrophobic organic pollutants. Cationic compounds interact mainly by electrostatic interaction with the deprotonated carboxylic groups of HA. Other functional groups of HA such as quinones, may form covalent bonds with aromatic ammines or similar organic compounds. Computational and experimental works show that the interaction of HA with hydrophobic organics is mainly due to π–π interactions, hydrophobic effect and hydrogen bonding. Several works report that sorbing efficiency is related to the hydrophobicity of the sorbate. Papers about the interaction between organic pollutants and humic acids dissolved in solution, in the solid state and adsorbed onto solid particles, like aluminosilicates and magnetic materials, are reviewed and discussed. A short discussion of the thermodynamics and kinetics of the sorption process, with indication of the main mistakes reported in literature, is also given.

show abstract

Section: Interaction Of Organic Pollutants With Dissolved Humic Acidssupporting

confidence: 86%

Sorption of Organic Pollutants by Humic Acids: A Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Because DOM is ubiquitous in natural waters, it may not be suitable to consider the freely dissolved HOCs as the only bioavailable form; the bioavailability of DOM-associated HOCs should be taken into consideration in aquatic environments. Furthermore, the DOM concentration and structure will vary among the natural waters, , and other water conditions including cations and pH values could influence the binding of HOCs to DOM. , In addition, DOM effect on the bioavailability of HOCs also depends on the exposure regime . Consequently, the concentration, molecular weight, composition, and structure of DOM as well as other water conditions and the exposure regime should be considered when studying the bioavailability of HOCs in aquatic environments.…”

Section: Resultsmentioning

confidence: 99%

Quantifying Bioavailability of Pyrene Associated with Dissolved Organic Matter of Various Molecular Weights to Daphnia magna

Lin

Xia

et al. 2017

Environ. Sci. Technol.

View full text Add to dashboard Cite

Dissolved organic matter (DOM) is a key environmental factor for the bioavailability of hydrophobic organic compounds (HOCs) in natural waters. However, the bioavailability of DOM-associated HOCs is not clear. In this research, pyrene was selected as a model HOC, and its freely dissolved concentration (C) was maintained by passive dosing systems. The immobilization and pyrene content in the tissues excluding gut of Daphnia magna were examined to quantify the bioavailability of DOM-associated pyrene. The results indicated that DOM promoted the bioavailability of pyrene when the C of pyrene was kept constant, and the bioavailability of pyrene associated with DOM of various molecular weights was ordered as middle molecular weight (5 000-10 000 Da) DOM > lower molecular weight (<1 000, 1 000-3 000, and 3 000-5 000 Da) DOM > higher molecular weight (>10 000 Da) DOM. The influencing mechanisms of DOM molecular weight were related with the partition of pyrene between DOM and water, the uptake routes of DOM by D. magna, and the desorption or release of pyrene from DOM in the gut of D. magna. The findings obtained in this research suggest that the bioavailability of DOM-associated HOCs should be taken into account for the eco-environmental risk assessment of HOCs in water systems.

show abstract

“…Surface water quality is affected by DOM concentrations which may pose undesired color, taste, and odor in drinking water (Kenefick et al, 1992;Mallevialle and Suffet, 1987). Furthermore, it forms complexes with many organic and inorganic pollutants (Aiken et al, 2011;Ding et al, 2019;Lubal et al, 1998;Mei et al, 2016;Senesi and Chen, 1989). In water treatment facilities DOM brings upon several problems, mainly the enhancement of biofilms growth on pipelines and membranes (Herzberg and Elimelech, 2007;Katz et al, 2014;Schneider et al, 2005;Tarchitzky et al, 2013).…”

Section: Introductionmentioning

confidence: 99%