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Environ Technol

Title:		Insight into the adsorption mechanisms of trace organic carbon on biological treatment process
Author(s):		Zolfaghari M; Drogui P; Brar SK; Buelna G; Dube R;
Address:		"a Institut national de la recherche scientifique, Eau, Terre et Environnement (INRS-ETS), Universite du Quebec , Quebec , QC , Canada. b Centre de Recherche Industrielle du Quebec (CRIQ) , Quebec , QC , Canada"
Journal Title:		Environ Technol
Year:		2017
Volume:		20161128
Issue:		18
Page Number:		2324 - 2334
DOI:		10.1080/09593330.2016.1259355
ISSN/ISBN:		1479-487X (Electronic) 0959-3330 (Linking)
Abstract:		"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. ABBREVIATIONS: CBZ: carbamazepine; DEHP: di-2-ethyl hexyl phthalate; DOM: dissolved organic matter; FLAN: fluoranthene; f(oc): fraction of organic carbon; HA: humic acid; Log Kow: octanol-water partition coefficient; PAH: polycyclic aromatic hydrocarbon TS: total solid; TrOCs: trace organic carbons VS: volatile solid"
Keywords:		"Adsorption *Carbon Humic Substances Organic Chemicals *Sewage Water Pollutants, Chemical Trace organic carbon adsorption isotherm adsorption kinetics humic acid sludge;"
Notes:		"MedlineZolfaghari, Mehdi Drogui, Patrick Brar, Satinder Kaur Buelna, Gerardo Dube, Rino eng England 2016/11/09 Environ Technol. 2017 Sep; 38(18):2324-2334. doi: 10.1080/09593330.2016.1259355. Epub 2016 Nov 28"