Journal
WATER ENVIRONMENT RESEARCH
Volume 86, Issue 6, Pages 532-539Publisher
WILEY
DOI: 10.2175/106143014X13975035524943
Keywords
COD; flow injection technique; TiO2 nanotube sensor; refractory organics; surface water
Funding
- National High Technology Research and Development Program of China [2009AA063003]
- National Nature Science Foundation of China [20677039]
- Tech Cross Fund of Shanghai Jiaotong University
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A simple, rapid and environmental friendly online chemical oxygen demand (COD) analytical method based on TiO2 nanotube sensor in conjunction with the flow injection technique was proposed to determine the COD of aqueous samples, especially for refractory organics, low-concentration wastewater, and surface water. The new method can overcome the drawbacks of the conventional COD determination methods. The results show that with the new method, each analysis takes only about 1 to 3 min, the linear range is up to 1 to 500 mg.L-1 of the compound of interest, and the detection limit is 1 mg.L-1. The COD values obtained by the proposed method are more accurate than those obtained by the conventional method.
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