Recycling of acid from aqueous waste streams is highly important not only from the environmental point of view but also for developing the sustainable technology. One of the effective ways to recover acid from aqueous waste streams is the anion-exchange membrane based diffusion-dialysis. The work presents the synthesis and characterization of anion-exchange pore-filled membranes for the objective of recovery of high concentration of acid by diffusion dialysis. The membranes were prepared by anchoring the guest organic-inorganic anionic gel in the pores of the host poly(propylene) membrane by in situ UV-initiator induced polymerization of the appropriate monomers along with cross-linker. The removal of nitric acid in the presence of different representative monovalent, divalent and trivalent nitrates and the leakage of these ions through anion exchange membrane have been studied by DD technique for optimizing the chemical composition of the membrane. The nitric acid permeation rate of the membrane with the optimized composition has been found to be considerably faster than the commercial Selemion membrane without sacrificing salt leakage. The performance of the optimized pore-filled anion exchange membranes has been found to be independent of the acid concentration, nature of the anion and substrate and has been observed to be solely dependent on the guest inorganic-organic hybrid anionic gel component. The membranes have been found to be stable and reusable for the acid recovery. Removal of nitric acid as high as 90% from the simulated high level nuclear waste with the optimized grafted pore-filled membrane has been achieved with negligible salt transport.

从水性废物流中回收酸不仅从环境角度看非常重要，而且对于开发可持续技术也非常重要。从含水废水中回收酸的有效方法之一是基于阴离子交换膜的扩散渗析。这项工作提出了阴离子交换孔填充膜的合成和表征，目的是通过扩散渗析回收高浓度的酸。通过适当的单体与交联剂的原位UV-引发剂引发的聚合，通过将客体有机-无机阴离子凝胶锚固在主体聚丙烯膜的孔中来制备膜。在不同的代表性单价原子存在下去除硝酸 通过DD技术研究了二价和三价硝酸盐和这些离子通过阴离子交换膜的泄漏，以优化膜的化学组成。已经发现，在不牺牲盐泄漏的情况下，具有优化组成的膜的硝酸渗透速率比市售Selemion膜快得多。已发现优化的孔填充阴离子交换膜的性能与酸浓度，阴离子和底物的性质无关，并且已观察到其仅取决于客体无机-有机杂化阴离子凝胶组分。已经发现该膜是稳定的并且可用于酸回收。