A large amount of organophosphorus-containing wastewater is produced in spent lithium-ion battery disposal. Forward osmosis (FO) offers unique advantages in purifying this kind of wastewater if suitable draw solutes – the core of FO technology, are available. Herein we synthesize several pH-sensitive zinc complexes, namely ZnATMP-iNa ( = 0, 1, 2, 3, 4), from ZnSO and amino tris(methylene phosphonic acid) (ATMP) obtained from scale inhibitor wastes for organophosphorus-containing wastewater remediation. Among these ZnATMP-iNa, ZnATMP-3Na best meets the standards of an ideal draw solute. This makes ZnATMP-3Na outperform other reported draw solutes. 0.6 M ZnATMP-3Na produces a water flux of 12.7 LMH, 136 % higher than that of NaCl and a solute loss of 0.015 g/L, lower than that of NHHCO (0.83 g/L). In organophosphorus-containing wastewater treatment, ZnATMP-3Na has higher water recovery efficiency (8.3 LMH) and sustainability than NaCl and NHHCO, and is sufficient to handle large quantities of wastewater. Remarkably, the pH-responsive property allows ZnATMP-3Na to be readily recovered through pH-control and reused in FO. The ionic property, expanded cage-like structure and easy-recycling make ZnATMP-3Na achieve sustainable FO separation and superior to other draw solutes. This study provides inspiration for draw solute design from wastes and extends FO application to organophosphorus-containing wastewater remediation.

中文翻译：

---

将阻垢剂废物回收成 pH 响应型复合物，用于处理废旧锂离子电池处理产生的废水


废旧锂离子电池处置过程中会产生大量含有机磷废水。如果有合适的驱动溶质（FO 技术的核心），正向渗透 (FO) 在净化此类废水方面具有独特的优势。在此，我们用 ZnSO 和从含有机磷废水的阻垢剂废物中获得的氨基三（亚甲基膦酸）（ATMP）合成了几种 pH 敏感的锌配合物，即 ZnATMP-iNa (= 0, 1, 2, 3, 4)。补救措施。在这些 ZnATMP-iNa 中，ZnATMP-3Na 最符合理想驱动溶质的标准。这使得 ZnATMP-3Na 优于其他报道的吸引溶质。 0.6 M ZnATMP-3Na 产生的水通量为 12.7 LMH，比 NaCl 高 136%，溶质损失为 0.015 g/L，比 NHHCO (0.83 g/L) 低。在含有机磷废水处理中，ZnATMP-3Na比NaCl和NHHCO具有更高的水回收效率（8.3 LMH）和可持续性，足以处理大量废水。值得注意的是，pH 响应特性使得 ZnATMP-3Na 可以通过 pH 控制轻松回收并在 FO 中重复使用。离子特性、膨胀的笼状结构和易于回收使得ZnATMP-3Na实现可持续的FO分离并优于其他驱动溶质。这项研究为从废物中提取溶质的设计提供了灵感，并将 FO 应用扩展到含有机磷废水修复。