Jung, Kyung-Won Hwang, Min-Jin Jeong, Tae-Un Ahn, Kyu-Hong 2024-01-20T06:30:47Z 2024-01-20T06:30:47Z 2021-09-04 2015-09 0960-8524 https://pubs.kist.re.kr/handle/201004/125099 In the present study, an aluminum electrode-based electrochemical process was newly adopted as a modification method for fabricating physically and chemically modified biochar derived from marine macroalgae. Specifically, a current density of 93.96 mA cm (2) was applied for 5 min at pH 3.0. Subsequently, the mixture was stirred continuously for 30 min without electric field, and the dried sample was then pyrolyzed at 450 degrees C under a N-2 environment for 2 h. SEM-EDS and XRD analyses clearly indicated that nano-sized aluminum crystals (beohemite, AlOOH) were uniformly present on the EM-biochar surface. Adsorption equilibrium tests showed that the phosphate adsorption onto EM-biochar agreed well with the Langmuir-Freundlich adsorption isotherm model, with a maximum adsorption capacity of 31.28 mg-P g (1). These findings suggest that this novel and simple electro-modification method is a reasonable and effective option for simultaneously upgrading both the surface area and chemical properties of biochar. (C) 2015 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD REMOVAL PHOSPHATE WATER SORPTION A novel approach for preparation of modified-biochar derived from marine macroalgae: Dual purpose electro-modification for improvement of surface area and metal impregnation Article 10.1016/j.biortech.2015.05.052 1 BIORESOURCE TECHNOLOGY, v.191, pp.342 - 345 BIORESOURCE TECHNOLOGY 191 342 345 scie scopus 000357661700044 2-s2.0-84937947235 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article REMOVAL PHOSPHATE WATER SORPTION Modified-biochar Beohemite Black carbon Phosphate Adsorption isotherm