在水源中选择性预缩和快速量化Cr (VI) 的疏水性深性溶剂嵌入聚合物膜
Komal C Shrivastava1, Jayshree Ramkumar1,2, Manisha Venkatesh1
1Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
Langmuir : the ACS journal of surfaces and colloids
|August 14, 2025
概括
一种新型的膜使用疏水性深度浸溶剂 (HDES) 有效地从水中预先缩六价 (Cr(VI)). 这种方法为监测这种常见污染物提供了敏感的检测极限.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 六价 (Cr(VI)) 是来自自然和工业来源的普遍水污染物,需要有效的监测和整治策略.
- 现有的Cr(VI) 检测和去除方法在灵敏度和适用性方面面临挑战,这些方法适用于复杂的矩阵,如皮革厂的废水.
研究的目的:
- 开发和表征一种疏水的深溶解剂 (HDES) 固定膜,用于从水溶液中预先缩CrVI.
- 评估使用能量分散式X射线光 (EDXRF) 检测Cr(VI) 的开发膜的效率和分析性能.
主要方法:
- 制造一个疏水的深度浸泡溶剂 (HDES) -纤维素三酸盐 (CTA) 膜.
- 使用诸如原子力显微镜 (AFM),扫描电子显微镜 (SEM),富里埃转换红外光谱 (FTIR) 和接触角度测量等技术来对膜进行表征.
- 从水溶液和制厂废水中预先缩Cr(VI),然后使用EDXRF和诱导合等离子体 - 光学发射光谱仪 (ICP-OES) 进行分析.
主要成果:
- 通过HDES-CTA膜去除Cr(VI) 的最佳pH值被确定为3.
- 吸附过程遵循兰格穆尔吸附异温模型,并显示动力学从伪第一阶段到伪第二阶段的转变.
- 通过EDXRF技术,可以直接分析膜上保留的Cr,检测极限为0.04 mg L-1 在0.1-10 mg L-1的度范围内.
- 膜在各种水样品中表现出有效的性能,并评估了各种阴离子的干扰.
结论:
- 在环境水样中,HDES固定膜是预先缩和敏感检测Cr (VI) 的有前途的工具.
- 开发的方法为监测六价污染提供了直接,高效和敏感的方法.
- 该研究强调了基于HDES的材料在环境修复和分析应用中的潜力.
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