EPA-102-E3S3-02-01

102

1,370 千元

2013/02/27

2013/12/31

秦靜如

環檢所

鄭先佑

國立中央大學環境工程研究所

環境監測及檢測

循環伏安法、線性掃描伏安法，化學需氧量

cyclic voltammetry, linear sweep voltammetry, chemical oxygen demand

秦靜如

03-4227151#34675

cjchin@cc.ncu.edu.tw

在即時水質分析技術評析部份，綜合來說，即時分析設備可分為工作站式與電極/感測器式，隨著電腦資料儲存容量的增進，大量儲存偵測資料並進行分析運算的功能提昇，因此即使如BOD原需要耗時較長的水質項目，可藉由提高溶氧量測頻率並搭配模式運算，將分析時間大幅縮短為數小時至3天。在利用奈米碳管修飾電極進行化合物定量定性分析之文獻彙整部分，分別對於奈米碳管複合材料修飾電極、官能基引入或化合物結合，以及利用二氧化鈦進行COD等電化學分析進行探討。利用奈米碳管修飾電極進行COD初步測試部份，運用未改質多壁奈米碳管(raw)、酸化多壁奈米碳管(T0M1)、以及包覆TiO2之TiO2/MWCNTs(T1M1)分別進行網版印刷碳電極的修飾，並完成修飾材料物性、表面化性、及電極特性等特性分析。對KHP與glucose所配置的COD模擬水樣之CV與LSV分析結果顯示，三種修飾電極在KHP所配置的COD模擬溶液中，氧化峰的電流值均與COD濃度有良好相關性，並且TiO2/MWCNTs複合材料修飾的電極有最好的相關性。但在glucose所配置的COD模擬溶液中，三種電極的在氧化峰的電流值與COD濃度之相關性均下降，可能是因為電流值過低。最後對四種產業廢水進行試驗，結果顯示，不同水樣會有不同LSV圖與氧化峰值，因此若以定電位方式進行電流量測與COD濃度計算，實有可能低估COD值。

循環伏安法、線性掃描伏安法，化學需氧量

EPA102E3S30201.pdf

5MB

2014/2/1 上午 12:00:00

The main objective of this work is to conduct literatures reviews of the in-situ analysis techniques for future development and regulation. Also, although using carbon nanotubes (CNTs) electrodes for gas and biochemical sensing has been studied extensively, there are very little researches related to using such electrodes for the environmental water quality analysis. Another goal of this work is to reviewworks of electrochemical analysis by CNTS electrode and water quality analysis by electrochemical methods.We have collected various in-situ monitoring techniques for BOD, CODand ammonia. The mechanisms, advantages and disadvantages have also been discussed. With the advances in data storage, BOD can be determined within few hours to 3 days by measuring the oxygen uptake frequently and analyzing the data by model fitting. The literature review of carbon nanotube electrodes has focused on theperformance of composite metal/CNTS electrodes, effects of functional groups/polymers on the signals, and COD analysis via TiO2. TiO2/MWCNTs composite particles have been synthesized. The printed-screen carbon electrode has been modified by raw MWCNTs, acid-treated MWCNTs and TiO2/MWCNTs. All three modified electrodes were used to conduct cyclic voltammetry (CV) and linear sweep voltammetry (LSV) for the modeled COD solutions made of KHP or glucose.The results showed that, for the KHP solution, the peak current has good correlation to the COD concentration. The electrode modified by TiO2/MWCNTs has the best performance. However, such good correlation were not found, which may be because the peak currents were too small. The LSV of the wastewater of four industries are different. This suggests that analysis of COD by measuring the current at a fixed applied voltage may underestimate the COD.

cyclic voltammetry, linear sweep voltammetry, chemical oxygen demand