Jung, Kyung-Won Jeong, Tae-Un Kang, Ho-Jeong Chang, Jae-Soo Ahn, Kyu-Hong 2024-01-20T03:34:00Z 2024-01-20T03:34:00Z 2021-09-05 2016-08 0960-8524 https://pubs.kist.re.kr/handle/201004/123814 The preparation conditions of electro-modification (current density) and pyrolysis (pyrolysis temperature and heating rate) processes were simultaneously optimized using response surface methodology with the quadratic regression model associated with Box-Behnken design. By numerical optimization, the phosphate adsorption capacity of 245.06 mg/g was achieved, corresponding to 99.9% of the predicted values under statistically optimized conditions (current density: 38.78 mA/cm(2), pyrolysis temperature: 584.1 degrees C, heating rate: 6.91 degrees C/min). By considering R-2 and three error functions values, the experimental results of adsorption kinetics, and the equilibrium isotherms at different temperatures (10-30 degrees C) showed that predictive pseudo-second-order and Sips isotherm models could adequately interpret the phosphate adsorption process for 'statistically optimized electrically modified'-biochar (SOEM-biochar). The maximum phosphate adsorption capacities of SOEM-biochar were found to be 273.9, 345.1, and 460.3 mg/g at 10, 20, and 30 degrees C, respectively, which are higher than that of other adsorbents reported in the literature. (C) 2016 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD RESPONSE-SURFACE METHODOLOGY ACTIVATED CARBONS AQUEOUS-SOLUTIONS WATER ADSORPTION NANOCOMPOSITES ADSORBENT RECOVERY ABILITY CAKE Preparation of modified-biochar from Laminaria japonica: Simultaneous optimization of aluminum electrode-based electro-modification and pyrolysis processes and its application for phosphate removal Article 10.1016/j.biortech.2016.05.005 1 BIORESOURCE TECHNOLOGY, v.214, pp.548 - 557 BIORESOURCE TECHNOLOGY 214 548 557 scie scopus 000377366900070 2-s2.0-84966359050 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article RESPONSE-SURFACE METHODOLOGY ACTIVATED CARBONS AQUEOUS-SOLUTIONS WATER ADSORPTION NANOCOMPOSITES ADSORBENT RECOVERY ABILITY CAKE Electro-modification Biochar Phosphate Response surface methodology Kinetics Equilibrium isotherms