TY - JOUR AU - Taeyoon Lee, PY - 2020/10/27 Y2 - 2024/03/29 TI - Accelerated phosphorus removal using sulfate-coated expanded vermiculite JF - Water SA JA - WSA VL - 46 IS - 4 October SE - Research paper DO - 10.17159/wsa/2020.v46.i4.9075 UR - https://watersa.net/article/view/9075 SP - AB - <p>This study evaluated whether phosphorus in an aqueous solution can be effectively adsorbed and removed by sulfuric acid (SA)-coated vermiculite (SCV), which was synthetized by heating a mixture of expanded vermiculite (EV) and SA at 300°C. Phosphorus was removed from the aqueous solution and removal characteristics were evaluated by batch kinetic, batch adsorption, and column tests. The phosphate removal rates (h<sup>-1</sup>) for 1, 2.5, 5, 7.5, 12.5, and 25 g∙L<sup>-1</sup> of SCV were 0.00015, 0.0011, 0.0044, 0.0087, 0.0648, and 0.5002, respectively. The <em>Q</em><sub>max</sub> of the Langmuir model and the partition coefficients of the linear and Freundlich models were 8.92 mg∙g<sup>-1</sup>, 0.65 L∙g<sup>-1</sup>, and 4.60 L∙g<sup>-1</sup> (1/<em>n</em> = 0.354), respectively. The equilibrium phosphorus adsorptions (<em>q<sub>e</sub></em>) were 7.47, 14.69, and 19.53 mg∙g<sup>-1</sup> at initial concentrations of 10, 25, and 50 mg∙L<sup>-1</sup>, respectively. These results show that SCV can efficiently adsorb phosphorus in an aqueous solution.</p> ER -