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http://dx.doi.org/10.17663/JWR.2015.17.3.228

Evaluation on the adsorption and desorption capabilities of filter media applied to the nonpoint source pollutant management facilities  

Moon, Soyeon (Department of Civil and Environmental Engineering, Kongju National University)
Hong, Jungsun (Department of Civil and Environmental Engineering, Kongju National University)
Choi, Jiyeon (Department of Civil and Environmental Engineering, Kongju National University)
Yu, Gigyung (Korea Expressway Corporation Research Institute)
Kim, Lee Hyung (Department of Civil and Environmental Engineering, Kongju National University)
Publication Information
Journal of Wetlands Research / v.17, no.3, 2015 , pp. 228-236 More about this Journal
Abstract
Urbanization causes many environmental, hydrological and ecological problems such as distortion of the natural water circulation system, increase in nonpoint source pollutants in stormwater runoff, degradation of surface water quality, and damage to the ecosystem. Due to the increase in impervious surface by urbanization, developed countries apply low impact development (LID) techniques as important alternatives to reduce the impacts of urbanization. In Korea, LID techniques were employed since 2012 in order to manage nonpoint source pollutants. LID technology is a technique for removing pollutants using a variety of physical, chemical and biological mechanisms in plants, microorganisms and filter media with the reduced effluence of stormwater runoff by mimicking natural water circulation system. These LID facilities are used in a variety of filter media, but an assessment has not been carried out for the comprehensive comparison evaluation of adsorption and desorption characteristics for the pollutant removal capacity. Therefore, this study was conducted to analyze the adsorption and desorption characteristics of various filter media used in the LID facilities such as sand, gravel, bioceramic, wood chips and bottom ash etc. in reducing heavy metals(Pb, Cu). In this study, the adsorption affinity for Pb in all filter media was higher than Cu. Pseudo second order equation and Langmuir-3 isotherm are more applicable in the adsorption kinetic model and adsorption isotherm model, respectively. As a result of the desorption experiment, the filter media does not exceed KSLT which is the hazardous substance leaching limit, showing the capability of the filter media in LID. The bioceramic and woodchip as filter medias were evaluated and exhibited excellent adsorption capacity for Pb.
Keywords
adsorption; desorption; filter media; heavy metals; nonpoint source management; stormwater runoff;
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Times Cited By KSCI : 5  (Citation Analysis)
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