{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Zachary R Laughrey", "hasEmail": "mailto:zlaughrey@usgs.gov"}, "description": "Microcystin-LR (MC-LR), a cyanotoxin produced during some harmful algal blooms (HABs), can have negative impacts on water ecosystems. Current treatment methods have potential drawbacks: physical removal can cause cell lysis and toxin release, and chemical treatment can cause disinfection byproducts (DBPs). Ultraviolet C (UV-C) treatment can degrade cyanotoxins without producing additional waste in the process. In this study we compared the degradation of MC-LR (initial concentration ~50 ppb) in deionized (DI) water and surface waters by UV-C light emitted from a krypton-chlorine excimer lamp (UV222) versus a low-pressure Hg lamp (UV254).  Quantitative analyses of the resulting samples by protein phosphatase 2a (PP2a) inhibition assays and liquid chromatography-high resolution mass spectrometry (LC-HRMS) were completed. The results of these analysis are provided in this data release.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9FJWX6Q", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.63e55f4cd34efa0476ade507.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_63e55f4cd34efa0476ade507", "keyword": ["Kansas", "Ohio", "USGS:63e55f4cd34efa0476ade507", "cyanobacteria [\"blue-green algae\"]", "cyanotoxin", "environment", "health", "microcystin", "ultraviolet", "waterworks"], "modified": "2025-02-27T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-95.3108, 38.9642, -95.3100, 38.9637", "theme": ["geospatial"], "title": "Determination of the concentration and activity of microcystin-LR and degradants after irradiation with 254 nm and 222 nm UV light with Protein phosphatase 2a inhibition assays and high-resolution mass spectrometry using isotope dilution"}