The eutrophication of lakes and rivers affects water quality of drinking water. The phosphate is one of the main sources causing the eutrophication. Recently, constructed wetlands with adsorption media as a bed material are applied for preventing phosphorus from releasing to water bodies; the media are used to effectively uptake phosphate from water. In this study, red-mud-based ceramic media were applied for P uptake form aqueous solution. Impact of contact time, initial P level, temperature on phosphate adsorption to the media were investigated. The maximum adsorption capacity (qmax) was calculated to be 420 mg kg-1. As initial concentration increased from 0.2 to 200 mg L-1, adsorption capacity increased from 2.4 to 420 mg kg-1. The adsorption of phosphate to the media follows the Freundlich isotherm model. As temperature increased from 15 to 35 °C, the adsorption capacity of the media also increased. The results showed that the ceramic media used in this study can be utilized in constructed wetlands for uptake of phosphate from water. The characteristics of the ceramic adsorbent were also evaluated using scanning electron microscopy, Brunauer–Emmett–Teller adsorption test, fourier transform infrared spectroscopy, and energy dispersive X-ray, and will be presented in the symposium.

Uptake of phosphorus from water using red-mud-based ceramic media

256th National Meeting (2018)

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