Global calibration model of UV-Vis spectroscopy for COD estimation in the effluent of rural sewage treatment facilities

Abstract

In recent years, rural sewage treatment facilities have grown rapidly in China, and yet the water quality of the effluent has not been well monitored.

Optimization of indirect wastewater characterization: a hybrid approach based on decision trees, genetic algorithms and spectroscopy

“…51873Near-infrared reflectance commercial spectrometryPLS1997Ref. 52150—Commercial spectroscopy200–500 nmPLS—10.3840.945Ref. 52150—200–500 nmSVM—11.4720.931Ref.…”

“…52150—Commercial spectroscopy200–500 nmPLS—10.3840.945Ref. 52150—200–500 nmSVM—11.4720.931Ref. 52150—200–500 nmBP-NN—10.6500.979Current research (Fig.…”

“…52150—200–500 nmSVM—11.4720.931Ref. 52150—200–500 nmBP-NN—10.6500.979Current research (Fig. 11)BOD 5 Treated32543LED spectrophotometer developed by the authors380–700 nmDecisions tree and genetic algorithms1.4181.5647.91Ref.…”

Highly sensitive electrochemical determination of chemical oxygen demand by carbon‐capsulated CuOx derived from Cu foam supported Cu‐MOF

“…To address these challenges, various efforts have been made to automate or simplify the traditional approaches [3]. Spectroscopic methods such as ultraviolet-visible (UV-Vis) spectroscopy [4,5] and fluorescence spectroscopy [6] offer fast responses without the addition of contaminating chemicals. Catalytic oxidation techniques, including photocatalysis [7], electrochemical catalysis [8,9], and photoelectric catalysis [10] to have been introduced to overcome challenges associated with reduced analytic accuracy due to turbidity and internal interactions among contaminants.…”

Design and development of an innovative online modular device for both water and wastewater monitoring

“…[17][18][19][20] Hakim et al (2019) used SEN0189, a tested and characterized sensor module, to analyze water turbidity using an infrared LED and infrared phototransistor placed at 90° from the light source to detect number of suspended solids in the water. 21 The COD sensors in water had been developed by measuring absorption of UV light, [22][23] because most organic contaminants in water would absorb light under UV range. Zhao et.…”