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- W2107413421 abstract "This study investigated the potential of using a mixture of fishpond bund material, completely decomposed granite and river sand as substrate in a constructed wetland for phosphorus removal. Core samples were collected from the newly constructed Hong Kong Wetland Park (HKWP) receiving influent stormwater from a nearby new town, and batch incubation experiments were conducted to determine the P sorption characteristics of sediments. The HKWP sediments adsorbed the majority of available P in the initial 20 min of incubation, with a first-order rate constant of 1.01–2.11 h −1 . Sediments in the reedbeds and freshwater marshes possessed a great capacity for P adsorption with the high Langmuir sorption maxima (478–858 mg kg −1 ) and Freundlich adsorption constants (417–672 L kg −1 ) obtained, attributable to the high amorphous iron and aluminium concentrations compared to other constructed wetlands. Moreover, sediment equilibrium P concentrations were generally low (4.6–23.6 μg L −1 ), facilitating a net P adsorption by sediments under moderate P loadings. Yet, the amount of P adsorbed by the HKWP sediments was limited by the low ambient porewater P concentrations and there was even a risk of P desorption when sediments in the freshwater marshes were resuspended into the water column. While substrates in the HKWP demonstrated a great potential for P adsorption, consideration should also be given to P loadings in influent water to fully utilize the P sorption capacity of sediments and enhance the P removal efficiency of constructed wetlands." @default.
- W2107413421 created "2016-06-24" @default.
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- W2107413421 date "2009-05-01" @default.
- W2107413421 modified "2023-09-26" @default.
- W2107413421 title "Phosphorus sorption by sediments in a subtropical constructed wetland receiving stormwater runoff" @default.
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- W2107413421 doi "https://doi.org/10.1016/j.ecoleng.2008.11.009" @default.
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