Abstract
In this study, we evaluated the adsorption of phosphate in environmental water by granular GB with binder (G-GB) at the Biyo center of the Lake Biwa-Yodo River Water Quality Preservation Organization. We measured phosphate, temperature, river temperature, humidity, pH, suspended solids (SS), turbidity, chemical oxygen demand (COD), F, Br, B, Al, Mn, Fe, Zn, Ba, Ni, Pb, Cr, As, Mo, Ag, Sn, Sb, Bi and U at the Biyo center. The measurements were performed from September 2007 to December 2008. G-GB did not show ability to adsorb phosphate or COD. The maximum detected concentrations of F, Br, B, Al, Mn, Fe, Zn, Ba, Ni and Pb were 300, 200, 150, 4.5, 250, 150, 30, 80, 30 and 10μg/L, respectively. In particular, B and Mn showed greater removal by G-GB than the other elements. The percentages of B and Mn removed by adsorption onto G-GB were 34 and 72%, respectively. We thus created a new granular adsorbent with ability to adsorb B and Mn and demonstrated its suitability for use in environmental water.
