Influence of dissolved organic matter and oil on the biosorption of BTEX by macroalgae in single and multi-solute systems
| Autor: | Mayra Cecilia Rodriguez-Hernandez, Jose Rene Rangel-Mendez, Carlos E. Flores-Chaparro |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Langmuir
Health Toxicology and Mutagenesis BTEX 010501 environmental sciences Xylenes 010402 general chemistry 01 natural sciences Ethylbenzene chemistry.chemical_compound Ulva Adsorption Isomerism Dissolved organic carbon Benzene Derivatives Environmental Chemistry Freundlich equation Biomass Organic Chemicals 0105 earth and related environmental sciences Chromatography Xylene Biosorption Benzene General Medicine Seaweed Pollution 0104 chemical sciences Solutions Petroleum chemistry Solubility Environmental chemistry Toluene |
| Zdroj: | Environmental science and pollution research international. 24(26) |
| ISSN: | 1614-7499 |
| Popis: | The effect of dissolved organic matter (DOM) and oil on the removal of the water-soluble compounds benzene, toluene, ethylbenzene, and xylene isomers (BTEX) by two low-cost biosorbents Macrocystis pyrifera and Ulva expansa) was evaluated. DOM decreased the adsorption capacity of toluene, ethylbenzene, and xylenes of the two biosorbents. In contrast, the removal of benzene increased under the same conditions in single and multi-solute systems: this effect was dominant in U. expansa biomass treatments. In the presence of DOM and oil in solutions, the removal of BTEX notoriously increased, being oil that contributed the most. Solubility and hydrophobicity of pollutants played a key role in the adsorption process. The attractions between BTEX molecules and biosorbents were governed by π-π and hydrophobic interactions. Affinities of biosorbents for BTEX were mainly in the order of X > E > T > B. The Langmuir and Sips equations adjusted the adsorption isotherms for BTEX biosorption in deionized and natural water samples, but in the case of oily systems, the Freundlich equation seemed to have a better fit. The biosorption processes followed a pseudo-second-order rate in all the cases. |
| Databáze: | OpenAIRE |
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