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A novel adsorbent functionalized with tri-octylamine (TOA) to effective removal of Cr(VI) from sulfate medium
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2021-04-15 , DOI: 10.1016/j.jtice.2021.03.046
I.M. Ahmed , A.A. Nayl

The possible use of mustard seeds functionalized with tri-octylamine (TOA) as a novel adsorbent (TOA-M)-BR was used successfully to remove Cr(VI) from sulfate media. The effectiveness of various factors such as, effect of H2SO4 concentration, liquid-to-solid (V/m) ratios, contact time, initial concentrations of Cr(VI), in addition to temperature were investigated. At the optimum conditions (V/m 1.0 Lg−1, H2SO4: 2.5 M, T: 25±1 °C), (%R) was >99% and the maximum uptake reached to 22.67 mg g−1. Cr(VI) uptake process followed the pseudo-first-order rate and thermodynamic parameters were estimated. The obtained data have illustrated that the adsorption process was feasible, spontaneous, and endothermic in nature. The adsorption equilibrium compliance with Langmuir isotherm. The results exhibited that, Cr(III) is not adsorbed under the operating conditions that lead to separate Cr(VI) and Mo(VI) from some fission products such as Eu (III), La(III), Ce(IV), and Y(III) with impregnated (TOA-M)-BR with considerable values of separation efficiency. Both Mo(VI) and Cr(VI) were adsorbed with an efficiency of 90 and 70%, respectively.



中文翻译:

一种新型吸附剂,经三辛胺(TOA)功能化,可有效地从硫酸盐介质中去除Cr(VI)

使用三辛胺(TOA)功能化的芥菜籽作为新型吸附剂(TOA-M)-BR的成功应用已成功地从硫酸盐介质中去除了Cr(VI)。研究了H 2 SO 4浓度,液固比(V / m),接触时间,Cr(VI)的初始浓度等各种因素以及温度的影响。在最佳条件下(V / m 1.0 Lg -1,H 2 SO 4:2.5 M,T:25±1°C),(%R)> 99%,最大吸收量达到22.67 mg g -1。Cr(VI)的吸收过程遵循拟一级反应速率,并估算了热力学参数。获得的数据表明,吸附过程本质上是可行的,自发的和吸热的。吸附平衡符合朗缪尔等温线。结果表明,在导致某些裂变产物(例如Eu(III),La(III),Ce(IV),和Y(III)浸渍(TOA-M)-BR,具有相当高的分离效率值。Mo(VI)和Cr(VI)的吸附效率分别为90%和70%。

更新日期:2021-05-05
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