分析物
电化学
废水
化学
酸碱反应
校准
基础(拓扑)
校准曲线
电极
工艺工程
生化工程
生物系统
检出限
色谱法
环境科学
环境工程
有机化学
数学分析
统计
数学
物理化学
生物
工程类
作者
Fengjun Yin,Shuangshuang Liu,Xiaohui Yang,Shun Lu,Ying Zhao,Lin Chang,Zhaoming Chen,Hong Liu
标识
DOI:10.1021/acs.est.4c02949
摘要
Electrochemical sensing (ES) is crucial for improving data acquisition in wastewater treatment, but obtaining the signal for a low electroactive analyte is challenging. Here, we propose an electrochemical acid–base transport limitation (eABTL) principle for inertness-based sensing, offering a new insight into generating ES signals from an interfacial transport process rather than electron transfer. This principle enables potential ES application for various weak acids and bases (WABs) without reactions themselves. We established an eABTLP method for detecting orthophosphate in solutions as a proof of concept, demonstrating commendable accuracy and precision, and a wide detection range from 10 μM to over 300 mM. Endogenous interferences were identified using 23 weak acids, indicating no significant endogenous interfering factors in typical wastewaters. Of them, volatile fatty acids are the main interference, but their effect can be eliminated by adjusting pH above 6.0. Exogenous factors like anions, cations, ion strength, temperature, organic load, and dissolved oxygen were examined, and most of their effects can be ignored by maintaining consistent analytical procedures between calibration curve and sample. Furthermore, measurement of wastewater samples confirmed the applicability toward domestic wastewater and demonstrated its wide applicability when combined with digestion pretreatment. Given the merits of inertness-based sensing, the eABTL-based methods have the potential to be a crucial part of ES techniques for environmental and industrial monitoring.
科研通智能强力驱动
Strongly Powered by AbleSci AI