title: Prediction of powdered activated carbon doses for 2-MIB removal in drinking water treatment using a simplified HSDM approach.
abstract: The addition of powdered activated carbon (PAC) is an effective measure to cope with seasonal taste and odor (T&O) problems caused by 2-methylisoborneol (2-MIB) and trans-1, 10-dimethyl-trans-9-decalol (geosmin) in drinking water. Some T&O problems are episodic in nature, and generally require rapid responses. This paper proposed a simplified approach for the application of the homogenous surface diffusion model (HSDM) to predict the appropriate PAC doses for the removal of 2-MIB. Equilibrium and kinetic experiments were performed for 2-MIB adsorption onto five PACs in three source waters. The simplified HSDM approach was compared with the experimental data, by assigning the Freundlich 1/n value in the range of 0.1-1.0 and obtaining the Freundlich equilibrium parameter K value through a 6-hr adsorption kinetic test. The model describes the kinetic adsorption data very well for all of the tested PACs in different source waters. The results were validated using the data obtained from one full scale water treatment plant, and the differences between the predicted and observed results were within 10% range. This simplified HSDM approach may be applied for the rapid determination of PAC doses for water treatment plants when faced with 2-MIB episodes in source waters.
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Yu
authors.affiliation: Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City 70101, Taiwan.
authors.forename: Fong-Chen
authors.initials: FC
authors.lastname: Yang
authors.affiliation: Green Energy and Environment Research Laboratories, Industrial Technology, Research Institute, Hsinchu 30011, Taiwan.
authors.forename: Wei-Nung
authors.initials: WN
authors.lastname: Hung
authors.affiliation: Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City 70101, Taiwan.
authors.forename: Chia-Ling
authors.initials: CL
authors.lastname: Liu
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China.
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.affiliation: Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City 70101, Taiwan. Electronic address: tflin@mail.ncku.edu.tw.
authors.forename: Tsair-Fuh
authors.initials: TF
authors.lastname: Lin
mesh_terms: D000327:Adsorption; D001892:Camphanes / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D004058:Diffusion; D007700:Kinetics; D008962:Models, Theoretical; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D001892:Camphanes; D014874:Water Pollutants, Chemical; C005536:2-methylisoborneol; D002244:Carbon
keywords: 2-MIB; Adsorption; Drinking water; Powdered activated carbon; Taste and odor