Elution of pyrene from activated carbon into an aqueous system containing humic acid

Article Abstract:

Activated carbon significantly enhanced the solubility of pyrene in an aqueous solution with humic acids. The rate of pyrene elution is increased by polycyclic aromatic hydrocarbons, which possess specific strong bands comparable to carbon-hydrogen deformation peaks. A micelle-like partition model, which is inspired by the Langmuir isotherm, can be utilized to determine the water solubility of pyrene. Model results indicated that pyrene's water solubility and humic acid concentration are not linearly correlated.

Humic acid, Humic acids

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Margules equation applied to PAH solubilities in alcohol-water mixtures

Article Abstract:

Margules equations proved useful in determining the solubilities of polycyclic aromatic hydrocarbons (PAHs) in alcohol-water mixtures. Results indicate that the solubility of the PAHs examined, which include phenanthrene, pyrene and perylene, increases as alcohol volume fraction increases. Margules equations reveal that incorporating the solvent-cosolvent and solute-solvent-cosolvent interaction terms in the model gives more accurate predictions, particularly at cosolvent volume fractions near 0.5.

Solubility

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Identification of Exxon Valdez oil in sediments and tissues from Prince William Sound and the northwestern gulf of Alaska based on a PAH weathering model

Article Abstract:

A first-order loss-rate kinetic model of polynuclear aromatic hydrocarbon (PAH) weathering prove useful in determining the petroleum spilled from the oil tanker T/V Exxon Valdez in the environment. Around 1541 field samples were found to contain adequate concentration of PAH to validate the application of the model. Results indicated that the rate of weathering of petroleum depends on the ratio of surface area to volume of petroleum in the environment.

Research and Development in the Physical, Engineering, and Life Sciences, PETROLEUM AND COAL PRODUCTS, Petroleum, Petroleum and Coal Products Manufacturing, Water Pollution Control R&D, Models, Exxon Valdez Oil Spill Disaster, 1989, Oil spills, Water pollution research, Weathering

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