title: Effects of oligomerization phenomenon on dissolved organic matter removal kinetics on novel activated carbons.
abstract: The overall objective of this research was to determine the effects of oxidative coupling (oligomerization) phenomenon on the adsorption kinetics of dissolved natural organic matter (DOM) on novel tailored activated carbons. A comparison of adsorption kinetics data collected in the presence and absence of phenolic compounds under both oxic (presence of molecular oxygen) and anoxic (absence of molecular oxygen) conditions showed that the adsorption rate of DOM was strongly affected by the oligomerization phenomenon. The diffusion rate of DOM is in inverse proportion to the critical oxidation potential of the phenolic compound. In addition, the roles of carbon physicochemical characteristics and DOM molecular weight distribution were also investigated. Tailored activated carbon impregnated with manganese oxide was found to play an important role in promoting complexation reactions between DOM and phenolic compounds. Meanwhile, Fulvic acid molecules (component of DOM) with molecular weight below 2000 Da appeared to have more potential to get influenced from oligomerization effects.
authors.affiliation: Environmental Engineering Program, Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States.
authors.forename: Liang
authors.initials: L
authors.lastname: Yan
authors.affiliation: Program of Civil Engineering, California State Poly Pomona, Pomona, CA 91768, United States.
authors.forename: Valerie
authors.initials: V
authors.lastname: Deeter
authors.affiliation: Environmental Engineering Program, Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States.
authors.forename: Jacob
authors.initials: J
authors.lastname: Lalley
authors.affiliation: Program of Information Technology & Management, Illinois Institute of Technology, Chicago, IL 60647, United States.
authors.forename: Oscar
authors.initials: O
authors.lastname: Medellin
authors.affiliation: Environmental Engineering Program, Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States.
authors.forename: Margaret J
authors.initials: MJ
authors.lastname: Kupferle
authors.affiliation: Environmental Engineering Program, Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States. Electronic address: George.Sorial@uc.edu.
authors.forename: George A
authors.initials: GA
authors.lastname: Sorial
mesh_terms: D000327:Adsorption; D001578:Benzopyrans / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D006812:Humic Substances; D007700:Kinetics; D017895:Manganese Compounds / Q000737:chemistry; D008956:Models, Chemical; D010087:Oxides / Q000737:chemistry; D010636:Phenols / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001578:Benzopyrans; D006812:Humic Substances; D017895:Manganese Compounds; D010087:Oxides; D010636:Phenols; D014874:Water Pollutants, Chemical; C027424:manganese oxide; D002244:Carbon; C005023:fulvic acid
keywords: Adsorption; Dissolved organic matter; Kinetics; Oligomerization; Phenolic compounds; Tailoring activated carbon