膜蒸馏法去除硼：一项对比研究。

Boron Removal by Membrane Distillation: A Comparison Study.

作者信息

Alkhudhiri Abdullah, Bin Darwish Nawaf, Hakami Mohammed Wali, Abdullah AbdelKader, Alsadun Ahmed, Abu Homod Hosam

机构信息

National Center for Desalination & Water Treatment Technology, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia.

Chemical Engineering Technology Department, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia.

出版信息

Membranes (Basel). 2020 Sep 28;10(10):263. doi: 10.3390/membranes10100263.

DOI:10.3390/membranes10100263

PMID:32998231

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7600657/

Abstract

Several Membrane Distillation (MD) technologies have been employed to remove boron from various concentrations. In this study, Vacuum Membrane Distillation (VMD), Permeate Gap Membrane Distillation (PGMD), and Air Gap Membrane Distillation (AGMD) are examined to evaluate their effectiveness when combined with several boron concentrations (1.5, 7 and 30 ppm) and operating parameters (circulation rate from 0.9 L/min to 5 L/min, feed temperature from 40 to 70 °C, and pH from 3-11). Those concentrations of boron are selected on the basis of the concentration of boron in the permeate side of the single-pass reverse osmosis (RO) system, Arabian Gulf, and contaminated brackish water. Moreover, synthetic seawater is treated to assess MD technologies' effectiveness. A high removal efficiency of boron is accomplished by MD. AGMD, PGMD, and VMD are promising methods for the desalination industry. AGMD shows excellent boron removal, which was above 99% with a wide ranging concentration. In addition, VMD demonstrates good permeate flux compared to the other MD technologies, which were about 5.8 kg/m·h for synthetic seawater. Furthermore, there is no noteworthy influence of the pH value on the boron removal efficiency.

摘要

几种膜蒸馏（MD）技术已被用于从不同浓度的溶液中去除硼。在本研究中，对减压膜蒸馏（VMD）、渗透间隙膜蒸馏（PGMD）和气隙膜蒸馏（AGMD）进行了研究，以评估它们在与几种硼浓度（1.5、7和30 ppm）以及操作参数（循环速率从0.9 L/min到5 L/min、进料温度从40到70°C、pH值从3至11）相结合时的有效性。这些硼浓度是根据单级反渗透（RO）系统渗透侧、阿拉伯湾以及受污染微咸水中的硼浓度选定的。此外，对合成海水进行处理以评估MD技术的有效性。MD实现了较高的硼去除效率。AGMD、PGMD和VMD是海水淡化行业中很有前景的方法。AGMD表现出优异的硼去除效果，在很宽的浓度范围内硼去除率都高于99%。此外，与其他MD技术相比，VMD表现出良好的渗透通量，对于合成海水，其渗透通量约为5.8 kg/m·h。此外，pH值对硼去除效率没有显著影响。