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首页> 外文期刊>Environmental Science & Technology >Novel Multicharge Hydroacid Complexes That Effectively Remove Heavy Metal Ions from Water in Forward Osmosis Processes
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Novel Multicharge Hydroacid Complexes That Effectively Remove Heavy Metal Ions from Water in Forward Osmosis Processes

机译：在正向渗透过程中能有效去除水中重金属离子的新型多电荷氢氟酸络合物

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摘要

Suitable draw solutes are crucial to maximize the potential of forward osmosis (FO) in water treatment. In this study, a novel three-dimensional, multicharge draw solute of oxalic acid (OA) chromium complex in a tetramethylammonium salt of [N(CH_(3))_(4)]_(3)[Cr(C_(2)O_(4))_(3)] (NMe_(4)-Cr-OA) was developed for electroplating wastewater treatment using FO processes. The newly designed NMe_(4)-Cr-OA has a Cr-centered octahedral structure and can ionize a multicharge anion [Cr(C_(2)O_(4))_(3)]~(3–) and three cations [N(CH_(3))_(4)]~(−) in its aqueous solution. Such characteristics are conducive to not only generating a high osmotic pressure but also minimizing reverse solute flux in an FO process, thus resulting in good FO performance. A high water recovery with a negligible reverse solute flux was achieved for NMe_(4)-Cr-OA in electroplating wastewater treatment via the FO process. Furthermore, a significant increase of 77% in FO efficiency was obtained when NMe_(4)-Cr-OA replaced the conventional draw solute of NH_(4)HCO_(3) for FO electroplating wastewater treatment with a copper rejection higher than 99.9%, which surpasses the best performance of other technologies reported for copper ion removal.
机译：合适的汲取溶质对于最大化水处理中正向渗透（FO）的潜力至关重要。在这项研究中，[N（CH_（3））_（4）] _（3）[Cr（C_（2））的四甲基铵盐中草酸（OA）铬配合物的新型三维多电荷吸引溶质O_（4））_（3）]（NMe_（4）-Cr-OA）被开发用于使用FO工艺处理电镀废水。新设计的NMe_（4）-Cr-OA具有Cr中心的八面体结构，并且可以使多电荷阴离子[Cr（C_（2_O_（4））_（3）]〜（3–）和三个阳离子[ N（CH_（3））_（4）]〜（-）在其水溶液中。这样的特性不仅有利于产生高的渗透压，而且有利于在FO过程中使反向溶质通量最小化，从而获得良好的FO性能。通过FO工艺处理电镀废水中的NMe_（4）-Cr-OA可实现高水回收率且反向溶质通量可忽略不计。此外，当NMe_（4）-Cr-OA替代传统的NH_（4）HCO_（3）的拉制溶质用于FO电镀废水处理且铜的排阻率高于99.9％时，FO效率显着提高了77％，超过了其他报道的铜离子去除技术的最佳性能。

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  • 来源
    《Environmental Science & Technology》 |2018年第7期|4464-4471|共8页
  • 作者

    Qiaozhen Chen; Wenxuan Xu; Qingchun Ge;

  • 作者单位

    College of Environment and Resources, Fuzhou University, Fujian 350116, China;

    College of Environment and Resources, Fuzhou University, Fujian 350116, China;

    College of Environment and Resources, Fuzhou University, Fujian 350116, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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