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首页> 外文期刊>Desalination and water treatment >Influence of feed concentration and pH on iron and manganese rejection via nanohybrid polysulfone/Ag-GO ultrafiltration membrane
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Influence of feed concentration and pH on iron and manganese rejection via nanohybrid polysulfone/Ag-GO ultrafiltration membrane

机译：进料浓度和pH对纳米杂化聚砜/ Ag-GO超滤膜对铁和锰去除的影响

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摘要

Iron and manganese are elements that exist naturally in water, especially groundwater. The aim of this work is to study the rejection mechanisms of iron and manganese at various feed concentration and investigate the influence of pH on metallic ions rejection using fabricated polysulfone (PSF) incorporated with silver-decorated graphene oxide (Ag-GO) ultrafiltration (UF) membrane or designated as GOS UF membrane. In single electrolyte solutions with feed concentration at 100 ppm and initial pH of 5.9 +/- 0.3, the rejection of iron and manganese were >= 83% and >= 60% respectively. Higher rejection was achieved as feed concentration increased to 1000 ppm for each ion with rejection of iron was >= 90% and manganese >= 75%. However, iron rejection was slightly decreased to similar to 78%, while manganese rejection severely declined to similar to 22% in multi-electrolytes filtration with feed concentration of 100 ppm iron and 50 ppm manganese. The feed pH for multi component system has significantly influenced iron and manganese rejection due to changes of the membrane surface properties. The rejection of iron and manganese by the negatively charged GOS UF membrane varied from 76% to 99% by adjustment of pH in the range of 3 to 11. Manganese rejection is mostly pH dependent with >= 97% rejection at feed pH >= 9. This mixed matrix membrane with superior properties has the potential to remove iron and manganese to the desired extent for groundwater treatment.
机译：铁和锰是天然存在于水中的元素，尤其是地下水。这项工作的目的是研究掺入银修饰的氧化石墨烯（Ag-GO）超滤（UF）的人造聚砜（PSF），研究各种进料浓度下铁和锰的排斥机理，并研究pH对金属离子排斥的影响。 ）膜或指定为GOS UF膜。在进料浓度为100 ppm且初始pH值为5.9 +/- 0.3的单一电解质溶液中，铁和锰的截留率分别为> = 83％和> = 60％。当进料浓度增加到每个离子的1000 ppm时，铁的截留率> = 90％，锰的截留率> = 75％时，达到更高的截留率。但是，在进料浓度为100 ppm的铁和50 ppm的锰的多电解液过滤中，铁的截留率略有下降，降至78％，而锰的截留率则严重下降至约22％。由于膜表面性能的变化，多组分系统的进料pH值对铁和锰的排阻有很大影响。带负电的GOS UF膜对铁和锰的截留率可通过在3至11的范围内调节pH值而从76％到99％不等。这种具有优异性能的混合基质膜具有去除铁和锰达到地下水处理所需程度的潜力。

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