Influence of temperature and turbidity on water COD detection by UV absorption spectroscopy

Kun-peng Zhou; Wei-hong Bi; Qi-hang Zhang; Xing-hu Fu; Guo-qing Wu

doi:10.1007/s11801-016-6178-z

Optoelectronics Letters ›› , Vol. 12 ›› Issue (6) : 461-464. DOI: 10.1007/s11801-016-6178-z

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Influence of temperature and turbidity on water COD detection by UV absorption spectroscopy

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Abstract

Ultraviolet (UV) absorption spectroscopy is used to detect the concentration of water chemical oxygen demand (COD). The UV absorption spectra of COD solutions are analyzed qualitatively and quantitatively. The partial least square (PLS) algorithm is used to model COD solution and the modeling results are compared. The influence of environmental temperature and turbidity is analyzed. These results show that the influence of temperature on the predicted value can be ignored. However, the change of turbidity can affect the detection results of UV spectra, and the COD detection error can be effectively compensated by establishing the single-element regression model.

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Kun-peng Zhou, Wei-hong Bi, Qi-hang Zhang, Xing-hu Fu, Guo-qing Wu. Influence of temperature and turbidity on water COD detection by UV absorption spectroscopy. Optoelectronics Letters, , 12(6): 461‒464 https://doi.org/10.1007/s11801-016-6178-z

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This work has been supported by the National Natural Science Foundation of China (No.61475133), the Science and Technology Research and Development Project of Hebei Province (Nos.14273301D, 15273304D, 16273301D and 16213902D).