ABSTRACT

Arsenic pollution in water sources has been a recurring issue for the nations where groundwater is the sole source of survival. While conventional pressure-driven membrane is the epitome of a water treatment solution, it is not without limitations for arsenic removal. Thus, adsorptive membranes are studied since they combine positive features of adsorption and ultrafiltration technology that makes them able to remove arsenic effectively while offering promising flux. While there are studies reporting on the roles of adsorptive membranes for arsenic removal, there is much to discover on the performance of different adsorptive membranes in terms of adsorption capacity, regeneration potential, and stability. In this review, we survey the characteristics of a wide range of nanoadsorbents focussing on the membrane properties for arsenic removal as well as regeneration process of adsorptive membrane using different solutions. The key challenges faced during membrane fabrication and operation are also highlighted providing a better insight toward development of more robust adsorptive membranes. It is hoped that through this review, researchers will be inspired to develop more functional adsorptive membranes with not only outstanding performance but also stable performance for arsenic removal.

摘要

对于以地下水为唯一生存来源的国家来说，水源中的砷污染一直是一个反复出现的问题。虽然传统的压力驱动膜是水处理解决方案的缩影，但它在除砷方面并非没有限制。因此，人们对吸附膜进行了研究，因为它们结合了吸附和超滤技术的优点，使其能够有效去除砷，同时提供有希望的通量。虽然有研究报道吸附膜在除砷方面的作用，但不同吸附膜在吸附容量、再生潜力和稳定性方面的性能还有很多有待发现。在这篇评论中，我们调查了各种纳米吸附剂的特性，重点关注除砷的膜特性以及​​使用不同溶液的吸附膜的再生过程。还强调了膜制造和操作过程中面临的关键挑战，为开发更坚固的吸附膜提供了更好的见解。希望通过这次综述，能够启发研究人员开发更多功能的吸附膜，不仅性能优异，而且除砷性能稳定。