对从水溶液中吸附 (IV) 的离子交换树脂的评估
A El-Tantawy1, E M Abu Elgoud2, S E A Sharaf El-Deen3
1Nuclear Fuel Technology Department, Hot Laboratories Center, Egyptian Atomic Energy Authority, P.O. 13759, Cairo, Egypt. aml90_eg@yahoo.com.
BMC chemistry
|January 9, 2025
概括
珀石IRA-400有效吸附水溶液中的 (IV) 离子. 这种强大的离子交换树脂具有出色的吸附-脱附能力,使其成为清除和其他金属离子的有希望的材料.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
背景情况:
- (IV) 是一种有毒的重金属污染物,存在于各种工业废水中.
- 有效地去除离子对于环境保护和水资源整治至关重要.
- 强烈基本的离子交换树脂为重金属离子吸附提供了潜力.
研究的目的:
- 为了研究amberlite IRA-400对 (IV) 离子的吸附性能.
- 用批量方法确定Se(IV) 吸附的最佳条件.
- 为了评估树脂的吸附动力学,等温,热力学和脱吸效率.
主要方法:
- 进行了批量吸附实验,以研究pH值,时间,吸附剂剂量,初始度和温度的影响.
- 使用EDX,FTIR和SEM,在吸附前和之后对树脂进行形态和化学表征.
- 吸附过程的动力,同热和热力学建模.
- 使用酸,盐酸和酸盐溶液进行脱研究.
主要成果:
- 在pH3.0,100.0毫克L-1的初始度,10.0毫克吸附剂剂剂量和60.0分钟的时间达到最佳的Se(IV) 吸附 (80.25%).
- 吸附遵循伪二次动力学和兰迈尔异热模型,在pH值3.0时最大吸附能力为18.52毫克-1g.
- 热力学分析显示了自发和外热吸附过程 (ΔG°和ΔH° < 0).
- 1.0 mol L-1 HNO是最有效的消吸剂,达到大约96.4%的消吸效率.
结论:
- 安伯莱特IRA-400是一种高效的吸附剂,用于从水溶液中去除 (IV) 离子.
- 树脂在多个吸附-脱附周期 (≥5次) 中表现出极好的可重复使用性.
- 珀石IRA-400显示出在废水处理中从裂变产品中去除Se (IV) 和其他金属离子的实际应用潜力.
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