Preparation of nano-magnesium oxide from Indonesia local seawater bittern using the electrochemical method

In this study, nano-size MgO was synthesized from seawater and bittern obtained from local salt industry in Pamekasan, Madura, Indonesia, using electrochemical method. The main purpose was to study the effects of seawater pre-concentration and bittern dilution on the structure and morphology of the MgO nanoparticles produced. Electrochemical process was performed in a two-compartment electrochemical cell with a fixed potential of 18 V, for 4 h at ambient temperature, and without adjusting the pH. Solid Mg(OH)₂ produced was converted into MgO by calcination treatment at 500 °C for 4 h, and then characterized using XRD and SEM technique. The characterization results revealed that spherical or cubic crystalline MgO were successfully produced, with the particle sizes in the range of 60–100 nm.

本研究以印度尼西亚马都拉岛帕梅卡桑当地制盐业提取的海水与苦卤为原料，采用电化学法合成纳米级氧化镁（MgO）。本研究的核心目的为探究海水预浓缩与苦卤稀释对所制备氧化镁纳米颗粒的结构与形貌的影响。电化学实验在双室电化学池中进行，固定电位为18 V，于室温下反应4 h，且未调节反应体系pH值。所得固态氢氧化镁经500 ℃煅烧4 h后转化为氧化镁，随后通过X射线衍射（XRD）与扫描电子显微镜（SEM）技术对产物进行表征。表征结果显示，本实验成功制备出粒径范围为60~100 nm的球形或立方晶型氧化镁。