利用TiO2電極檢測生活污水中COD之研究

The study on using TiO2 electrode to measure COD of municiple wastewater

梁昇致(Sheng-Jhih Liang)

指導教授 ： 章日行

朝陽科技大學/理工學院/環境工程與管理系/碩士(2013年)

摘要

現階段在化學需氧量（Chemical Oxygen Demand，COD）的檢測發展，檢測時間短與儀器自動化已然成為現代趨勢，而現階段電化學方法已被應用在其中。電化學方法主要是利用電解過程中所消耗的電量來求得反應物質含量，在電解過程裡會發生直接氧化與間接氧化兩種反應，藉著反應後產生的電流換算成電量，再與其反應物濃度製備成檢量線；本研究主要利
用TiO2電極結合電化學分析方法檢測水中COD，並藉由品管統計分析，評估TiO2電極檢測COD時之精密度與相對誤差，最後以試驗室規模為基礎發展自動化設備。
本試驗使用二氧化鈦為陽極板，再以電化學Amperometric方法進行試驗並製備檢量線，其試驗結果顯示，在1.5 V電壓下，其0至180 mg L-1 COD濃度，R2值為0.9623；0~290 mg L-1COD濃度範圍，R2值為0.9079；0~700 mg L-1 COD濃度，R2值為0.9364。原型機檢測實廠生活污水，在0至179
mg L-1 COD濃度範圍下，R2值為0.9771；0~216 mg L-1COD濃度範圍，R2值為0.9737。本方法相較於傳統的檢測法，利用電化學方法檢測COD，可達到不使用對環境衝擊之藥劑、分析時間短、操作簡單及自動化等優勢。

關鍵詞：二氧化鈦、化學需氧量、污水檢測、電化學分析

關鍵字

污水檢測 ； 二氧化鈦 ； 化學需氧量 ； 電化學分析

並列摘要

At the present stage, the detection development of Chemical Oxygen Demand ( COD) toward short detection time and automatic instrument, which is definitely the current tendency, and the electrochemical method has been applied in it . The electrochemical method mainly makes use of power consumption in electrolytic process to obtain the content of reactive substance, in such electrolytic process, there are two kinds of reactions, which are direct oxidation and indirect oxidation, the current generated can be converted into electric power by means of reaction, and then the Calibration Curve is made with the concentration of reactive substance; in this research, mainly utilizes TiO2 electrode combining the electrochemical analysis method to detect COD in water. When TiO2 electrode is detecting COD, the precision and relative error can be estimated by means of statistical analysis of quality control. Basing on the scale of experiment room, the target is to develop automatic equipment.
Titanium dioxide is used as anode plate in this experiment, and to carry out the experiment with Electrochemical Amperometric method, then the Calibration Curve is finished, its experimental result shows, from 0 to 180 mg L-1 COD concentration under 1.5V, R2 value is 0.9623; the range of concentration that is 0~290 mg L-1COD, R2 value is 0.9079; and 0~700 mg L-1 COD concentration, R2 value is 0.9364. Prototype machine detects domestic sewage in plant, the range of concentration is from 0 to 179mg L-1 COD, R2 value is 0.9771; and the concentration range is 0~216 mg L-1COD, R2 value is 0.9737。Comparing with the traditional detection method, our method takes advantage of electrochemical method to detect COD, the superiorities can be reached including without using any drug that will impact environment, short analysis time, easy operation and automation.

Keywords: Titanium dioxide, Chemical Oxygen Demand (COD), sewage detection, electrochemical analysis

並列關鍵字

Chemical Oxygen Demand (COD) ； Titanium dioxide ； sewage detection ； electrochemical analysis

參考文獻

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