使用自脱的合体双液阿弗伦DNAPL的密度修改:动力学,机制和影响因素
Chaoge Yang1, Chunpeng Zhang1, Fangyuan Liu1
1Key Lab of Groundwater Resources and Environment Ministry of Education, Jilin University, China; Jilin Provincial Key Laboratory of Water Resources and Water Environment, Jilin University, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, China.
Journal of hazardous materials
|September 12, 2024
概括
一种新型的自我脱的合双液体阿弗伦 (PO-CBLA-S) 有效地修改了密集的非水相液体 (DNAPL) 密度,用于地下水整治. 这项创新消除了外部脱硫剂,提高了效率并防止了二次污染.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 地质化学 地质化学
背景情况:
- 密度非水相液体 (DNAPL) 整治通常使用通过合性双液体阿弗伦 (CBLA) 的密度修饰.
- 目前的CBLA方法需要外部除硫剂,导致低效率和二次污染风险.
研究的目的:
- 开发一种用于DNAPL密度修饰的自脱CBLA (PO-CBLA-S).
- 为了消除在DNAPL修复中对外部脱硫剂的需求.
主要方法:
- 开发出一种自我脱的合性双液体阿弗龙 (PO-CBLA-S).
- 研究了自我脱动力学 (伪二次反应).
- 各种DNAPL的估计密度变化低于1g/cm3.
- 评估地下水化学影响 (pH,离子,温度,湿酸) 对高乙烯 (PCE) 密度的改变.
主要成果:
- 对于各种DNAPL,PO-CBLA-S在没有外部去软化剂的情况下实现了低于1g/cm3的密度.
- 电离子增强密度的变化比阴离子更多.
- 酸性和性条件,更高的温度和高酸度改善了PCE密度的改变.
- 由于内部表面活性剂-溶剂相互作用,被确定为表面活性剂纠的自我解机制.
结论:
- PO-CBLA-S为DNAPL密度修改提供了一种高效的,自我解的解决方案.
- 这项研究为在地下水整治中应用这项技术提供了理论基础.
- 消除外部脱硫剂可以提高修复的安全性和有效性.
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