基于多电极系统,同时确定地表水中的化学氧气需求,总,氨和
Xinyue Jiang1, Defu Liu1, Guodong Jiang2
1State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China.
ACS omega
|July 15, 2024
概括
一个新的多电极系统可以快速,同时监测关键的地表水质量参数,如化学氧气需求和总. 这项技术大大缩短了分析时间,从而实现了有效的现场部署.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 电化学 电化学 电化学
背景情况:
- 地表水质量监测对于环境保护至关重要.
- 分析COD,TN,氨和等参数的传统方法耗时,需要预处理样本.
- 需要快速的现场分析技术来实时评估水质.
研究的目的:
- 提出一种新的多电极系统,用于同时监测地表水中的化学氧气需求 (COD),总 (TN),氨 (N-NH4) 和 (P-PO4).
- 为了证明使用不同的电极材料 (Cu,Ir,Rh,Co,OH) 2,Zr,OH) 4和电化学技术进行选择性检测的可行性.
- 开发一种快速有效的在线,现场地表水质量分析方法.
主要方法:
- 开发一个使用Cu,Ir,Rh,Co (OH) 2和Zr (OH) 4电极的目标信号多电极系统.
- 循环电压测量和电化学阻抗光谱的应用,用于多维信号采集.
- 使用规范化和LASSO进行特征提取和尺寸缩小.
- 使用MLR,PLS和XGBoost的预测模型的评估.
主要成果:
- 多电极系统实现了COD (±10%/±5 ppm),TN (±10%/±0.2 ppm),N-NH4 (±5%/±0.1 ppm) 和P-PO4 (±5%/±0.01 ppm) 的高精度.
- 分析时间从几个小时缩短到几分钟,消除了对样品预处理的需求.
- 每个水质指数都被至少两个带有不同的传感机制的电极检测到.
结论:
- 开发的多电极系统为在线现场地表水质量监测提供了可行和高效的战略.
- 这种技术显著加快了关键水质参数的分析,使实时环境评估成为可能.
- 该系统在没有样品预处理的情况下进行分析的能力提高了其在现场应用中的实用性.
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