Institute of Chemical Sciences, University of Peshawar, Peshawar, Pakistan.
Department of Chemistry, Islamia College University Peshawar, Peshawar, Pakistan.
Environ Sci Pollut Res Int. 2020 Apr;27(11):11932-11943. doi: 10.1007/s11356-020-07619-5. Epub 2020 Jan 24.
In this article, we report the efficient removal of arsenic in the form of arsenite (As(III)) from an aqueous solution which was applied on the industrial effluents. A flat-sheet polypropylene-supported liquid membrane (SLM) was clamped between the feed phase and strip phase in a liquid membrane permeator setup using tridodecylamine (TDDA) as carrier for extraction of As(III). We have optimized the reaction in changing different parameters such as metal, acid concentration in feed phase, strip phase concentration, and carrier concentration for the maximum As(III) transport through the SLM. The flux value, time of extraction, the stoichiometry of the complex formed, and membrane stability were also investigated. As a result of different experiments performed, we find the best conditions of 0.1 mol/L of TDDA, 1.0 mol/L of HCl in feed phase at optimum pH 1, and 1.0 mol/L of NaOH in stripping phase for the maximum As(III) removal. The optimized reaction was utilized on effluent collected from different industries. During repeated set of experiments on a single polypropylene membrane, it was found that it could withstand five consecutive experiments. Moreover, as high as 93% of extraction efficiency was achieved in 180 min.
在本文中，我们报告了从工业废水中应用的水溶液中有效去除亚砷酸盐（As(III)）的方法。在液体膜渗透器装置中，使用三辛基胺（TDDA）作为载体，通过夹在进料相和剥离相之间的平板聚丙烯支撑液膜（SLM）来提取 As(III)。我们优化了反应，改变了不同的参数，如金属、进料相中酸的浓度、剥离相中浓度和载体浓度，以实现最大的 As(III) 通过 SLM 的传输。还研究了通量值、提取时间、形成的配合物的化学计量比和膜稳定性。通过进行不同的实验，我们发现最佳条件为 0.1 mol/L 的 TDDA、进料相中 1.0 mol/L 的 HCl 在最佳 pH 值 1 下和 1.0 mol/L 的 NaOH 在剥离相中，以实现最大的 As(III)去除率。优化后的反应用于处理来自不同行业的废水。在对单个聚丙烯膜进行的一系列重复实验中，发现它可以承受五次连续实验。此外，在 180 分钟内实现了高达 93%的提取效率。
