Chemicals of Emerging Concern in the Eastern Snake River Plain of Idaho: A Threat to Irrigated...
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Transcript of Chemicals of Emerging Concern in the Eastern Snake River Plain of Idaho: A Threat to Irrigated...
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Matt MorraSoil & Land Resources
Chemicals of Emerging Concern in the Eastern Snake River Plain of Idaho:A Threat to Irrigated Agriculture, Dairy, and
Aquaculture?
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Contaminants (Chemicals) of Emerging Concern
Contaminants not previously detected or present at concentrations not thought to be a problem.
Risks to human health and the environment not yet fully understood.
• Human pharmaceuticals• Personal care products• Endocrine disrupting compounds – interfere
with function of hormones • Veterinary drugs including antibiotics
CECs
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KimberlyTwinFalls Milner Dam
SnakeRiver
ResearchPlotsGroundwaterFlowSouthern border ofEastern SnakeRiverPlain
Thousand Springs
AmericanFalls
N
Kimberly, IDUSDA-ARS Northwest Irrigation & Soils Research Lab
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Agricultural activities and water use impacts on the transport of CECs to the Eastern Snake River Plain Aquifer of Idaho
CECs in Dairy Manure
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Manure 1 Manure 2Compound µg/kg
Estrone 102.87 35.94Estriol 27.01 17.86Equol 675.44 0.00Progesterone 28.87 7.04Hydroxyprogesterone 66.01 49.75Sulfadimethoxine 206.12 127.92Sulfathiazole 0.00 133.46Tetracycline 0.00 364.62
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Porewater sampler
Tensiometer
HPLC-MSAnalyses
Bioassays
Livercell bioassaysEndocrine disruption
FieldLaboratory
Irrigationwater
Soil
PorewaterManure
Antibiotic resistance gene spread
Soil
Lysimeterwater
ExtractsWater samples
Modeling/Recommendations
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Caffeine
Ibuprofen
Progesterone
Tetracycline
Hydroxyprogesterone
Field Lysimeter Data
No difference between control and manure treatments.
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BiosolidsInorganic fertilizer Manure
Biomarkers of horizontal spread of antibiotic
resistance
No evidence of xenogenetic pollution
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caffeine enterodiolpenicillin equolibuprofen formonentin
17α-hydroxyprogesteroneprogesterone17α-estradiol17β-estradiolestroneestriol
No pattern based on treatment.
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2 3 4 5 6Time (weeks)
0
20
40
60
80
100
Rel
ativ
e re
spon
se (%
)ManureFertilizer
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• No evidence of increased antibiotic resistance gene transfer from dairy manure.
• Strong endocrine disruption response from soil leachates.
• Main source of endocrine disrupting chemicals is not manure.
• Irrigation water? Agricultural chemicals?• Manure may decrease leaching of the
responsible compounds.
Summary
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This project was supported by the Agriculture and Food Research Initiative competitive grant 2013-67019-21375 from the USDA National Institute of Food and Agriculture.
James Nagler – fish liver bioassaysEva Top and Thibault Stalder – antibiotic resistanceInna Popova and Danika Hill – analytical chemistryJohn Hammel – soil physics (lysimeters and columns)