1
|
Rodriguez-Hernandez M, Pilato TC, Yerdon KA, Kysel IM, Taki F, Yale-Loehr S, Kaur G, Burke AE, Koscal N. Detained. N Engl J Med 2021; 384:1785-1787. [PMID: 33983690 DOI: 10.1056/nejmp2032690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Merlys Rodriguez-Hernandez
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Tara C Pilato
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Kayleigh A Yerdon
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Ian M Kysel
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Faten Taki
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Stephen Yale-Loehr
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Gunisha Kaur
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Alison E Burke
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| | - Natalie Koscal
- From Louisville, KY (M.R.-H.); Weill Cornell Medical College (T.C.P.) and the Department of Anesthesiology, Weill Cornell Medicine (F.T., G.K.) - both in New York; and Cornell Law School, Ithaca, NY (K.A.Y., I.M.K., S.Y.-L.)
| |
Collapse
|
2
|
Westerhoff P, Rodriguez-Hernandez M, Baker L, Sommerfeld M. Seasonal occurrence and degradation of 2-methylisoborneol in water supply reservoirs. Water Res 2005; 39:4899-912. [PMID: 16289672 DOI: 10.1016/j.watres.2005.06.038] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2004] [Revised: 06/28/2005] [Accepted: 06/29/2005] [Indexed: 05/05/2023]
Abstract
Methylisoborneol (MIB) and geosmin are cyanobacterial metabolites that occur at nanograms per liter levels in surface water supplies and are responsible for many taste and odor complaints about the aesthetics of drinking water. This study evaluated three water supply reservoirs with bottom-release (hypolimnion) outlet structures in Arizona. MIB concentrations were always higher than geosmin concentrations, but both followed similar seasonal trends. MIB concentrations increased from spring to late summer, and stratified vertically with depth in the water column; the highest concentrations were always in the upper 10 m of the water column. Thermal destratification in the autumn increased MIB concentrations released from the outlet of reservoirs and impacted downstream utilities for several months. By winter of each year MIB concentrations were non-detectable. Mass balance analyses on MIB indicated that in-reservoir reactions were more important in changing MIB concentrations than conservative hydraulic "flushing" of the reservoir. Maximum net loss rates for MIB in the field (R(F,max)) were on the order of 0.23-1.7 ng/L-day, and biodegradation appeared more important than volatilization, photolysis or adsorption. Using lake water in laboratory experiments, bacterial biodegradation rates (R(L)) ranged from 0.5-1 ng/L-day and were comparable to R(F,max) values. Based upon these rates, MIB concentrations in a reservoir would decrease by approximately 30 ng/L over a period of 1 month. This was the magnitude change in MIB concentrations commonly observed after autumn thermal destratification of the reservoirs.
Collapse
Affiliation(s)
- Paul Westerhoff
- Department of Civil and Environmental Engineering, Arizona State University, Box 5306, Tempe, AZ 85287-5306, USA.
| | | | | | | |
Collapse
|