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Insight into the adsorption mechanisms of trace organic carbon on biological treatment process.

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Zolfaghari, Mehdi; Drogui, Patrick; Brar, Satinder Kaur; Buelna, Gerardo; Dubé, Rino (2017). Insight into the adsorption mechanisms of trace organic carbon on biological treatment process. Environmental Technology , vol. 38 , nº 18. p. 2324-2334. DOI: 10.1080/09593330.2016.1259355.

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Résumé

The presence of recalcitrant dissolved organic matter (DOM) could have a significant effect on the adsorption mechanism and capacity of the sludge for many trace organic carbons (TrOCs). In this study, adsorption of three TrOCs on the sludge and HA was investigated. The results revealed that neutral hydrophilic compounds had an insignificant interaction with both sludge and HA. Positively charged compounds, such as fluoranthene, had more affinity toward HA than sludge with solid/liquid partitioning of 57 and 3.2 L/g, respectively. The adsorption intensity (K f) of di-2-ethyl hexyl phthalate was 0.5 and 1.13 for the HA and the sludge, respectively. By introducing the sludge to the solution of HA and TrOCs that already reached equilibrium, the sludge adsorption capacity in the presence of HA was investigated. The finding showed that at the lower concentration, adsorption of HA on the sludge was considered as the main removal pathway for the adsorbed emerging contaminants, as 70 mg of HA was adsorbed by a gram of sludge. For the higher concentration, desorption of TrOCs from DOM into the sludge comprised 15–30% of total removal efficiency.

Type de document: Article
Mots-clés libres: trace organic carbon; adsorption isotherm; adsorption kinetics; sludge; humic acid
Centre: Centre Eau Terre Environnement
Date de dépôt: 12 févr. 2018 21:35
Dernière modification: 12 févr. 2018 21:35
URI: http://espace.inrs.ca/id/eprint/5729

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