Characterization of pollutants and identification of microbial communities in the filter media of green infrastructures

Choi, Hang Seok; Reyes, Nash Jett; Jeon, Minsu; Kim, Lee-Hyung

doi:10.1016/j.ecoleng.2023.107012

Cited by 1 publication

(1 citation statement)

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“…This implies that pollutant concentrations respond to the total load rather than to changes in concentration in individual samples due to rainfall [33]. Therefore, for the calculation of NPS pollutants, the flow-weighted event mean concentration (EMC) shown in Equation ( 1) was used, considering the runoff flow rate for an accurate load calculation as the simple arithmetic mean concentration may show a large difference from the actual concentration [34][35][36]. The efficiency evaluation of NPS management technologies was based on the ratio of the sum of the inflow load to the sum of the outflow load, and the summation of loads method was used to calculate the removal efficiency by the total inflow load and the total outflow load, as shown in Equations ( 2) and (3).…”

Section: Calculations and Data Analysesmentioning

confidence: 99%

Evaluation of the Performance of Nature-Based Constructed Wetlands for Treating Wastewater from Various Land Uses in Korea

Choi,

Jeon,

Geronimo

et al. 2024

Water

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Land use changes, specifically the growth of impervious areas due to urbanization, exacerbate non-point-source pollutants in stormwater runoff, surpassing discharge from point sources in Korea. The application of nature-based solutions, such as constructed wetlands (CWs), is becoming popular for stormwater treatment, but challenges arise when background concentrations are overlooked, leading to reduced pollutant removal efficiency. This study aims to propose a plan for the sustainability of CWs by evaluating design appropriateness and utilizing existing monitoring results. The evaluation of 63 CWs reveals that meteorological factors, specifically antecedent dry days and rainfall depth, have significant impacts on urban stormwater runoff quality in various land uses, affecting the performance of CWs. Designing CWs considering land use is crucial due to the considerable concentration variations across different land uses. Improving CW performance requires proper maintenance strategies to ensure effective pollutant removal mechanisms, especially for poorly degradable organic substances post treatment. Rainfall characteristics play a pivotal role in CW design and operation, affecting capacity, efficiency estimation, and maintenance frequency. Considering various factors such as land use, watershed characteristics, and ease of maintenance is essential when utilizing CWs. This study’s findings contribute to the design and operation of future CWs, emphasizing the need for continuous performance analyses through long-term monitoring.

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