Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea.
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea.
J Hazard Mater. 2020 Apr 15;388:121815. doi: 10.1016/j.jhazmat.2019.121815. Epub 2019 Dec 3.
The presence of arsenic in the water system has been a universal problem over the past several decades. Inorganic arsenic ions mainly occur in two oxidation states, As(V) and As(III), in the natural environment. These two oxidation states of arsenic ions are ubiquitous in natural waters and pose significant health hazards to humans when present at or above the allowable limits. Therefore, treatment of arsenic ions has become more stringent based on various techniques (e.g., membrane filtration, adsorption, and ion exchange). This paper aims to review the current knowledge on various functional adsorbents through comparison of removal potential for As on the basis of key performance metrics, especially the partition coefficient (PC). As a whole, novel materials exhibited far better removal performance for As(V) and As(III) than conventional materials. Of the materials reviewed, the advanced sorbent like ZrO(OH)/CNTs showcased superior performances such as partition coefficient values of 584.6 (As(V) and 143.8 mol kg M (As(III) with excellent regenerability (>90 % of desorption efficiency after three sorption cycles). The results of this review are expected to help researchers to establish a powerful strategy for abatement of arsenic ions in wastewater.
在过去几十年中，砷在水系中的存在一直是一个普遍存在的问题。在自然环境中，无机砷离子主要以两种氧化态，As(V)和 As(III)存在。这两种砷离子的氧化态在天然水中普遍存在，当存在于允许的限度或以上时，对人类健康构成重大危害。因此，根据各种技术（例如膜过滤、吸附和离子交换），砷离子的处理变得更加严格。本文旨在通过比较关键性能指标（特别是分配系数（PC）），综述各种功能吸附剂对 As 的去除潜力，以了解当前的相关知识。总的来说，新型材料对 As(V)和 As(III)的去除性能远远优于传统材料。在所综述的材料中，ZrO(OH)/CNTs 等先进的吸附剂表现出了优异的性能，如分配系数值分别为 584.6（As(V)）和 143.8 mol kg M（As(III)），且具有良好的可再生性（三个吸附循环后解吸效率>90%）。预计本综述的结果将有助于研究人员建立一种处理废水中砷离子的有效策略。
