Synergistic effect of amino-acids and metal salts as draw solutions to enhance the performance of fertilizer-drawn forward osmosis,Environmental Science: Water Research & Technology

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Synergistic effect of amino-acids and metal salts as draw solutions to enhance the performance of fertilizer-drawn forward osmosis
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-09-24 , DOI: 10.1039/d0ew00599a
Mohammad Nematzadeh _{1,

2,

3,

4} , Soheila Shokrollahzadeh _{4,

5,

6,

7} , Abdolreza Samimi _{1,

2,

3,

4} , Davod Mohebbi-Kalhori _{1,

2,

3,

4}

Affiliation

In the present study, the osmotic properties of blended amino-acids–metal-salts fertilizer draw solutions, and their forward osmosis (FO) performances were investigated. Considering the different types of amino-acids–metal-salts, the blending of arginine with ZnCl₂ solution in the molar ratio of 1 : 6 could lead up to 3.0 and 8.3 times higher osmotic pressure and water flux (i.e., 93.89 bar and 29.57 LMH), respectively, compared to the sum of their individual values. Furthermore, a very little reverse solute flux was noticed using ZnCl₂–amino-acids draw solutions. As an effect of solute–solvent interaction, the formation of the novel structure of amino acids with metal salts could enhance the osmotic pressure, providing high water flux and low inverse diffusion of the solute. The desalination of Caspian Sea water was also successfully tested using arginine–ZnCl₂ fertilizer draw solution. Therefore, the fertilizer-based draw solutions can present great potential in different applications of the FO process, due to their relatively high water flux and no need for recovery.

中文翻译：

氨基酸和金属盐作为吸引溶液的协同作用，以增强肥料的正向渗透性能

在本研究中，研究了混合氨基酸-金属盐肥料抽提溶液的渗透特性及其正向渗透（FO）性能。考虑到氨基酸-金属盐的不同类型，以1：6的摩尔比混合精氨酸与ZnCl ₂溶液可导致渗透压和水通量分别提高3.0和8.3倍（即93.89 bar和29.57） LMH）分别与它们各自值的总和进行比较。此外，使用ZnCl ₂观察到非常小的反向溶质通量–氨基酸画溶液。由于溶质与溶剂的相互作用，氨基酸与金属盐形成新结构可以提高渗透压，从而提供高水通量和低溶质逆扩散。使用精氨酸-ZnCl ₂肥料抽提溶液也成功测试了里海海水淡化。因此，基于肥料的汲取溶液由于其较高的水通量且无需回收，因此在FO工艺的不同应用中具有巨大的潜力。

更新日期：2020-09-24

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