Systematic structure control of ammonium iodide salts as feasible UCST-type forward osmosis draw solutes for the treatment of wastewater†,Journal of Materials Chemistry A

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Systematic structure control of ammonium iodide salts as feasible UCST-type forward osmosis draw solutes for the treatment of wastewater†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-11 00:00:00 , DOI: 10.1039/c7ta09741g
Jeongseon Park _{1,

2,

3,

4,

5} , Heeyoung Joo _{1,

2,

3,

4,

5} , Minwoo Noh _{1,

2,

3,

4,

5} , Yon Namkoong _{1,

2,

3,

4,

5} , Seonju Lee _{1,

2,

3,

4,

5} , Kyung Hwa Jung _{3,

4,

5,

6,

7} , Hye Ryun Ahn _{5,

8,

9} , Seulah Kim _{1,

2,

3,

4,

5} , Jong-Chan Lee _{3,

4,

5,

6,

7} , Jae Hoon Yoon _{1,

2,

3,

4,

5} , Yan Lee _{1,

2,

3,

4,

5}

Affiliation

A variety of UCST-type thermoresponsive ammonium iodide salts is systematically designed and synthesised with desired aqueous solubility, phase-transition temperature, osmolality change, phase-transition concentration range, stability, and toxicity by controlling the ionic interactions, hydrophobicity, and symmetry of the salt structure. Suitable draw solutes can be selected based on the characteristics of the ammonium iodide salts as well as the feed solutions for feasible forward osmosis (FO)-based water purification. In this research, highly concentrated wastewater from a flue gas desulfuriser (FGD), with osmotic pressure three times higher than seawater, is targeted for purification by FO using the draw solutes. Two ammonium iodide salts (HM8I and HM10I) show a remarkable water flux from the wastewater samples and significantly lower salt leakage compared to conventional draw solutes. The osmolality of the phase-separated draw solution drops to less than one tenth of that of the initial feed solution, and reverse osmosis or nanofiltration can be applied to the solution with much lower external pressure for the final purification to produce fresh water. This systematic approach to the design and selection of suitable draw solutes can be an effective strategy for future practical FO-based wastewater treatment and seawater desalination.

中文翻译：

碘化铵盐的系统结构控制，作为可行的UCST型正向渗透吸引溶质，用于废水处理†

通过控制离子的相互作用，疏水性和对称性，系统地设计和合成了各种UCST型热敏碘化铵盐，它们具有所需的水溶性，相转变温度，重量克分子渗透压浓度变化，相转变浓度范围，稳定性和毒性。盐结构。可以根据碘化铵盐的特性以及可行的基于正向渗透（FO）的水净化进料溶液来选择合适的抽取溶质。在这项研究中，烟气脱硫器（FGD）产生的高浓度废水的渗透压是海水的三倍，其目标是通过使用萃取溶质的FO进行净化。与传统的抽提溶质相比，两种碘化铵盐（HM8I和HM10I）显示出来自废水样品的显着水通量，并且显着降低了盐泄漏。相分离的汲取溶液的重量克分子渗透压浓度降低至不到初始进料溶液的摩尔渗透压浓度，并且可以在较低的外部压力下对溶液进行反渗透或纳滤，以进行最终纯化以生产淡水。这种设计和选择合适的汲取溶质的系统方法可以成为未来基于FO的实际废水处理和海水淡化的有效策略。反渗透或纳滤可以在较低的外部压力下应用于溶液，以进行最终纯化以产生淡水。这种设计和选择合适的汲取溶质的系统方法可以成为未来基于FO的实际废水处理和海水淡化的有效策略。反渗透或纳滤可以在较低的外部压力下应用于溶液，以进行最终纯化以产生淡水。这种设计和选择合适的汲取溶质的系统方法可以成为未来基于FO的实际废水处理和海水淡化的有效策略。

更新日期：2017-12-11

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