{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T19:44:04Z","timestamp":1790624644724,"version":"4.1.0"},"reference-count":49,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2002,7,1]],"date-time":"2002-07-01T00:00:00Z","timestamp":1025481600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"U.C. Salinity\/Drainage Program"},{"name":"National Science Foundation, Division of Earth Sciences, Hydrological Sciences Program","award":["EAR 97-25799"],"award-info":[{"award-number":["EAR 97-25799"]}]},{"name":"National Science Foundation, Division of Earth Sciences, Hydrological Sciences Program","award":["00-03381"],"award-info":[{"award-number":["00-03381"]}]}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2002,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Selenium stable isotope ratios are known to shift in predictable ways during various microbial, chemical, and biological processes, and can be used to better understand Se cycling in contaminated environments. In this study we used Se stable isotopes to discern the mechanisms controlling the transformation of oxidized, aqueous forms of Se to reduced, insoluble forms in sediments of Se\u2010affected environments. We measured <jats:sup>80<\/jats:sup>Se\/<jats:sup>76<\/jats:sup>Se in surface waters, shallow ground waters, evaporites, digested plants and sediments, and sequential extracts from several sites where agricultural drainage water is processed in the San Joaquin Valley of California. Selenium isotope analyses of samples obtained from the Tulare Lake Drainage District flow\u2010through wetland reveal small isotopic contrasts (mean difference 0.7\u2030) between surface water and reduced Se species in the underlying sediments. Selenium in aquatic macrophytes was very similar isotopically to the NaOH and Na<jats:sub>2<\/jats:sub>SO<jats:sub>3<\/jats:sub> sediment extracts designed to recover soluble organic Se and Se(0), respectively. For the integrated on\u2010farm drainage management sites, evaporite salts were slightly (approximately 0.6\u2030) enriched in the heavier isotope relative to the inferred parent waters, whereas surface soils were slightly (approximately 1.4\u2030) depleted. Bacterial or chemical reduction of Se(VI) or Se(IV) may be occurring at these sites, but the small isotopic contrasts suggest that other, less isotopically fractionating mechanisms are responsible for accumulation of reduced forms in the sediments. These findings provide evidence that Se assimilation by plants and algae followed by deposition and mineralization is the dominant transformation pathway responsible for accumulation of reduced forms of Se in the wetland sediments.<\/jats:p>","DOI":"10.2134\/jeq2002.1146","type":"journal-article","created":{"date-parts":[[2010,6,14]],"date-time":"2010-06-14T02:52:09Z","timestamp":1276483929000},"page":"1146-1156","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":48,"title":["Selenium Stable Isotope Ratios in California Agricultural Drainage Water Management Systems"],"prefix":"10.1002","volume":"31","author":[{"given":"Mitchell J.","family":"Herbel","sequence":"first","affiliation":[{"name":"U.S. Geological Survey Water Resources Division 345 Middlefield Road, Mail Stop 480 Menlo Park CA 94025"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas M.","family":"Johnson","sequence":"additional","affiliation":[{"name":"Dep. of Geology, 245 Natural History Bldg., 1301 W. Green St. Univ. of Illinois Urbana IL 61301"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth K.","family":"Tanji","sequence":"additional","affiliation":[{"name":"Dep. LAWR, One Shield Avenue Univ. of California Davis CA 95616"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suduan","family":"Gao","sequence":"additional","affiliation":[{"name":"Dep. LAWR, One Shield Avenue Univ. of California Davis CA 95616"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas D.","family":"Bullen","sequence":"additional","affiliation":[{"name":"U.S. Geological Survey Water Resources Division 345 Middlefield Road, Mail Stop 480 Menlo Park CA 94025"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2002,7]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-1694(90)90068-9"},{"key":"e_1_2_7_3_1","first-page":"237","volume-title":"Selenium in the environment","author":"Cervinka V.","year":"1994"},{"key":"e_1_2_7_4_1","volume-title":"Electric Power Res. Inst. Rep. EA\u20104641","author":"Cutter G.A.","year":"1986"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/es970940s"},{"key":"e_1_2_7_6_1","volume-title":"Final report. Task 2. 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