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Full text release has been delayed at the author's request until May 08, 2025

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Occurrence and Evaluation of Methods for Microcystins in Water Treatment Plant Residuals

van Dommelen, Emma
http://rave.ohiolink.edu/etdc/view?acc_num=osu1673014625767523

Abstract Details

2023, Master of Science, Ohio State University, Civil Engineering.
Microcystins (MCs), a category of cyanotoxins produced by some species of the photosynthetic heterotrophic cyanobacteria, are the most studied, most associated with toxicity-related events, and most monitored in water. Water treatment plant (WTP) residuals are the solid byproduct of water treatment and consist of solids removed from physical and chemical processes and have been shown to contain cyanobacterial cells removed by conventional treatment processes. However, MCs in WTP residuals are not well understood. Although quantification methods of MCs for water samples have been adapted for solid matrices, their suitability for understanding the level of microcystins within a WTP residual sample is not well understood. Additionally, due to the inherent high variability within WTP residuals across the United States, these methods may not be optimal for every sample. Extraction and quantification methods were investigated to assess MCs in varied WTP residuals. Additionally, natural degradation observed in a utility’s storage lagoon and was investigated to determine the impact of physical, chemical, and biological treatments on MC concentration in high-biomass residuals. This study demonstrates that residuals of various characteristics across the United States contain MCs, and that in some sample’s extraction method (particularly methanol) and quantification method (particularly UPLC-PDA) increased measured MC, no single methodology is optimal for extracting and quantifying MCs across various residuals.
Natalie Hull (Advisor)
Linda Weavers (Committee Member)
John Lenhart (Committee Member)
78 p.
Civil Engineering; Environmental Engineering; Environmental Science; Water Resource Management
microcystin; microcystins; residuals; water treatment plant residuals; ADDA-ELISA; UPLC-PDA; microcystin quantification; microcystin extraction; microcystin occurrence

Recommended Citations

Citations

  • van Dommelen, E. (2023). Occurrence and Evaluation of Methods for Microcystins in Water Treatment Plant Residuals [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1673014625767523

    APA Style (7th edition)

  • van Dommelen, Emma. Occurrence and Evaluation of Methods for Microcystins in Water Treatment Plant Residuals. 2023. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1673014625767523.

    MLA Style (8th edition)

  • van Dommelen, Emma. "Occurrence and Evaluation of Methods for Microcystins in Water Treatment Plant Residuals." Master's thesis, Ohio State University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=osu1673014625767523

    Chicago Manual of Style (17th edition)

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© 2023, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.