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Simple and efficient dual-wavelength spectroscopy for the determination of organic matter in sewage sludge from wastewater treatment.
- Source :
-
RSC advances [RSC Adv] 2019 Apr 23; Vol. 9 (22), pp. 12580-12584. Date of Electronic Publication: 2019 Apr 23 (Print Publication: 2019). - Publication Year :
- 2019
-
Abstract
- In this study, a dual-wavelength spectroscopic method for rapid determination of organic matter in sludge was developed. The contents of the organic matter were calculated by determining the consumption of potassium dichromate (K <subscript>2</subscript> Cr <subscript>2</subscript> O <subscript>7</subscript> ) based on the production of trivalent chromium ions (Cr <superscript>3+</superscript> ). Cr <superscript>3+</superscript> could be determined by subtracting the absorption at 800 nm (spectral interference) from the absorption at 650 nm (only contributed by Cr <superscript>3+</superscript> ). The results showed that the relative standard deviation in the test was less than 5%. The same set of samples was used and when the content of organic matter was more than 150 g kg <superscript>-1</superscript> , the relative difference between the spectroscopic method and titration method was within 1%. Furthermore, the method does not require calibration based on the standard samples. In conclusion, the present method is simple, reliable, accurate and suitable for application in mass testing for sludge samples.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2046-2069
- Volume :
- 9
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- RSC advances
- Publication Type :
- Academic Journal
- Accession number :
- 35515849
- Full Text :
- https://doi.org/10.1039/c9ra00428a