کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
743283 | 894348 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A portable miniature UV-LED-based photoelectrochemical system for determination of chemical oxygen demand in wastewater A portable miniature UV-LED-based photoelectrochemical system for determination of chemical oxygen demand in wastewater](/preview/png/743283.png)
A portable, cost-effective, environmental friendly and miniature thin-layer photoelectrochemical system in conjunction with an ultraviolet light emitting diode (UV-LED) is developed for determination of chemical oxygen demand (COD), namely UV-LED PeCOD. The COD value is directly quantified by measuring the amount of electrons captured at a nanostructured TiO2 electrode during the exhaustive photoelectrocatalytic degradation of organic species in the thin-layer cell. The key parameters of the photoelectrochemical system, such as applied potential bias, light intensity and solution pH, were investigated and optimized. Combined with a microelectrochemical system and a laptop computer, the UV-LED PeCOD system enables end-users to perform on-site COD analysis in a simple, rapid, sensitive and accurate manner. Under the optimal conditions, the system can achieve a practical detection limit of 0.2 ppm COD with a linear range of 0–300 ppm COD. The proposed UV-LED PeCOD technology can potentially make a revolutionary improvement to the conventional COD analysis and may be widely used in water quality monitoring industry.
Journal: Sensors and Actuators B: Chemical - Volume 141, Issue 2, 7 September 2009, Pages 634–640