A Rapid Monitoring System for the Determination of COD in Waters Based on Ultrasonic Assisted Digestion and Miniaturized Spectral Analytical System

Abstract:

Chemical Oxygen Demand (COD) is an much important key water quality parameter . In view of the technical defects of existing detection methods and monitoring instruments for measuring COD, a new detection method based on ultrasonic assisted sample digestion and spectrum analysis was put forward in this paper, and the automatic monitoring system prototype based on such detection method had been developped. Aiming at environmental water samples, the spot experiment had been carried out to contrast prototype with Chinas national standard analysis method for measuring COD, and the results showed that the automatic monitoring instrument prototype had good repeatability (10%) and high accuracy (±10%), which met the technical qualifications of Chinas envirormental protection industry standards.

• Periodical: Applied Mechanics and Materials (Volumes 401-403)
• Pages: 1295-1300
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.401-403.1295
• Online since: September 2013
• Authors: Kang Lin Wei, Ming Chen, Fei Wang, Qiong Fang
• Keywords: Chemical Oxygen Demand (COD), Hydroxyl Radical, Micro-Spectrometer, On-Line Water Quality Monitoring

References

[1] Michael V. Storey, Water Research, 45(2), 741(2011).

[2] Viana da Silva, M. E. Alexandra, Analytica Chimica Acta, 699(2), 161 (2011).

[3] Wu, Guo-Qing, , Spectroscopy and Spectral Analysis, 31(6), 1486(2011).

[4] Kong, Huoliang, Wu, Huifang, Water Environment Research, 81(11), 2381 (2009).

[5] Aryal, Rupak; Vigneswaran, Sarvanamuthu, Applied Spectroscopy, 65(2), 227 (2011).

[6] Brady S. Gentle, Peter S. Ellis, Analytica Chimica Acta, 674, 117(2010).

[7] Zhang Shanqing, Li Lihong, Sensors and Actuators , 141(2), 634(2009).

[8] G. Schwotzer, Water Research, 45(5), 1423(2011).

[9] Dong, Mei Mei, Fernando Environmental Science and Technology, 44(15), 5714 (2011).

[10] Zhang, Bo-Tao, Zhao, Li-Xia, Journal of Environmental Sciences, 20(8), 1006 (2008).

[11] Lee, Yunho, Water Research, 44(2), 555 (2010).

[12] Francisco J. Real, L. Chemical Engineering Journal, 160(1), 72 (2010).

[13] S. Michael Elovitz, Research and Technology - AQUA, 57(6), 391 (2008).

[14] F. Raposo, M. A. De la Rubia, Analytical Chemistry, 29(9), 1082 (2010).

[15] Li, Jun, Tao, Tao, Li, Xue-bin, Desalination, 238(2), 139 (2009).

[16] Liao Hai-yang, Tian, Peng, Wen Zhi-yu. Manufacturing Process Technology, (189)(2011).