多孔增强 MgO/生物炭的制备及其在水溶液中除磷的应用：一种新型联合电化学改性方法的应用。
Fabrication of porosity-enhanced MgO/biochar for removal of phosphate from aqueous solution: Application of a novel combined electrochemical modification method.
机构信息
Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea.
Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea.
出版信息
Bioresour Technol. 2016 Jan;200:1029-32. doi: 10.1016/j.biortech.2015.10.008. Epub 2015 Oct 10.
A novel combined electrochemical modification (CEM) method, using a graphite electrode-based electric field and MgCl2 as electrolyte, was newly developed to prepare porosity-enhanced biochar containing periclase (MgO) nanocomposites (PE-MgO/biochar). During the CEM method, the dried marine macroalgae was immersed in the MgCl2 solution, and a voltage of 20V was then applied for 10min prior to pyrolysis. Morphological and chemical analyses results showed that nano-sized MgO particles with a highly crystalline structure were dispersed and enriched on the surface of the PE-MgO/biochar, which enabled higher phosphate adsorption capability. In an adsorption equilibrium test, among various biochars, PE-MgO/biochar exhibited the highest phosphate adsorption capacity from aqueous solution with a Langmuir-Freundlich maximum adsorption capacity as high as 620mg-Pg(-1). It can be concluded that the newly introduced CEM method is a potent additional technique to effectively prepare modified-biochar in terms of a simple and time-saving modification method.
一种新型的联合电化学修饰（CEM）方法，利用基于石墨电极的电场和 MgCl2 作为电解液，用于制备含有尖晶石（MgO）纳米复合材料的多孔增强生物炭（PE-MgO/生物炭）。在 CEM 方法中，将干燥的海洋大型藻类浸入 MgCl2 溶液中，然后施加 20V 的电压 10min 后进行热解。形态和化学分析结果表明，具有高结晶结构的纳米级 MgO 颗粒分散并富集在 PE-MgO/生物炭的表面上，从而提高了磷酸盐的吸附能力。在吸附平衡测试中，在各种生物炭中，PE-MgO/生物炭对水溶液中的磷酸盐表现出最高的吸附容量，朗缪尔-弗伦德利希最大吸附容量高达 620mg-Pg(-1)。可以得出结论，新引入的 CEM 方法是一种有效的附加技术，可以通过简单且节省时间的修饰方法来有效地制备改性生物炭。
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