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Kanankege KST, Traynor I, Perez AM. A reanalysis: Do hog farms cause disease in North Carolina neighborhoods? Front Vet Sci 2023; 9:1052306. [PMID: 36845665 PMCID: PMC9945130 DOI: 10.3389/fvets.2022.1052306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/30/2022] [Indexed: 02/11/2023] Open
Abstract
A 2018 publication reported that communities living near hog Concentrated Animal Feeding Operations (CAFO) in North Carolina, USA have increased negative health outcomes and mortalities. While the authors stated that the associations do not imply causation, speculative interpretation of their results by media and subsequent use as evidence in lawsuits caused detrimental effects on the swine industry. We repeated their study using updated data to evaluate the strength of conclusions and appropriateness of methods used with the ultimate goal of alerting on the impact that study limitations may have when used as evidence. As done in the 2018 study, logistic regression was conducted at the individual level using 2007-2018 data, while presumably correcting for six confounders drawn from zip code or county-level databases. Exposure to CAFOs was defined by categorizing zip codes into three by swine density; where, >1 hogs/km2 (G1), > 232 hogs/km2 (G2), and no hogs (Control). Association with CAFO exposure resulting in mortality, hospital admissions, and emergency department visits were analyzed related to eight conditions (six from the previous study: anemia, kidney disease, infectious diseases, tuberculosis, low birth weight, and we added HIV and diabetes). Re-evaluation identified shortcomings including ecological fallacy, residual confounding, inconsistency of associations, and overestimation of exposure. HIV and diabetes, which are not causally relatable to CAFOs, were also prominent in these neighborhoods likely reflecting underlying systemic health disparities. Hence, we emphasize the need for improved exposure analysis and the importance of responsible interpretation of ecological studies that affect both public health and agriculture.
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Affiliation(s)
- Kaushi S. T. Kanankege
- Center for Animal Health and Food Safety, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States,*Correspondence: Kaushi S. T. Kanankege ✉
| | - Isaac Traynor
- School of Public Health, University of Minnesota, Minneapolis, MN, United States,College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States
| | - Andres M. Perez
- Center for Animal Health and Food Safety, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States
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2
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Moore TC, Fong J, Rosa Hernández AM, Pogreba-Brown K. CAFOs, novel influenza, and the need for One Health approaches. One Health 2021; 13:100246. [PMID: 33997233 PMCID: PMC8091921 DOI: 10.1016/j.onehlt.2021.100246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 04/02/2021] [Accepted: 04/04/2021] [Indexed: 11/18/2022] Open
Abstract
Concentrated animal feeding operations (CAFOs) present highly efficient means of meeting food demands. CAFOs create unique conditions that can affect the health and environment of animals and humans within and outside operations, leading to potential epidemiological concerns that scale with operational size. One such arena meriting further investigation is their possible contribution to novel influenzas. CAFOs present opportunities for cross-species transmission of influenza as demonstrated by reports of swine flu and avian influenza outbreaks. Conditions and pathways leading to novel influenza strains are complex and require varied prevention and intervention approaches. Current challenges for prevention of respiratory viruses entering or leaving swine and poultry CAFOs are multifaceted and include adherence of personal safety measures, lack of training and safety provisions for personnel, and incomplete standardized federal, state, and/or county regulation and enforcement coverage across agricultural systems. This report acknowledges that any proposed CAFO-associated influenza intervention should be cross-organizational, and no single intervention should be expected to provide full resolution. Proposed interventions affect multiple components of the One Health triad, and include seasonal human influenza immunization, PPE regulation and adherence, alternative waste management, general biosecurity standardization and an industry best practices incentive program. Due to the complexity of this problem, multiple anticipated communication, enforcement, and logistical challenges may hinder the full implementation of proposed solutions. General and operation-specific (swine and poultry) biosecurity practices may mitigate some of the risks associated with influenza virus reassortment across species. Education and advocacy can help protect workers, communities, veterinarians and consumers from CAFO-associated influenza virus. To achieve this, there must be more complete communication between CAFOs, governing agencies, health services, animal services, researchers, and consumers to better explore the potential health outcomes associated with CAFOs.
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Affiliation(s)
- Thomas C. Moore
- The University of Arizona, Mel and Enid Zuckerman College of Public Health, Department of Epidemiology and Biostatistics, USA
| | - Joseph Fong
- The University of Arizona, Mel and Enid Zuckerman College of Public Health, Department of Epidemiology and Biostatistics, USA
| | - Ayeisha M. Rosa Hernández
- The University of Arizona, Mel and Enid Zuckerman College of Public Health, Department of Epidemiology and Biostatistics, USA
| | - Kristen Pogreba-Brown
- The University of Arizona, Mel and Enid Zuckerman College of Public Health, Department of Epidemiology and Biostatistics, USA
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3
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Waller DM, Meyer AG, Raff Z, Apfelbaum SI. Shifts in precipitation and agricultural intensity increase phosphorus concentrations and loads in an agricultural watershed. J Environ Manage 2021; 284:112019. [PMID: 33540198 DOI: 10.1016/j.jenvman.2021.112019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 01/14/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Fertilizers and manure applied to cropland to increase yields are often lost via surface erosion, soil leaching, and runoff, increasing nutrient loads in surface and sub-surface waters, degrading water quality, and worsening the 'dead zone' in the Gulf of Mexico. We leverage spatial and temporal variation in agricultural practices and precipitation events to examine how these factors affect stream total phosphorus (TP) concentrations and loads in the Sugar River (Wisconsin), recently listed as impaired. To perform our analysis, we first collected water quality data from 1995 to 2017 from 40 sites along the Sugar River and its tributaries. Starting in 2004, three dairy farms expanded to become concentrated animal feeding operations (CAFOs) in this watershed. We then estimated how time of year, stream position, discharge volume, and proximity to the newly expanded CAFOs affected TP concentrations and loads. Total P concentrations, which ranged from 0.02 to 1.4 mg/L and often exceeded the EPA surface water standard of 0.1 mg/L, increased with increases in stream discharge and proximity to dairy operations, peaking in early spring to mid-summer coincident with extreme precipitation events. Our empirical analysis also shows that TP concentrations downstream from the newly permitted CAFOs increased by 19% relative to upstream concentrations. When examining total daily phosphorus loads (concentration × discharge) from this 780 km2 watershed, we found that loads ranged from 5.88 to 4801 kg. Compared to upstream TP loads, those downstream from the CAFOs increased by 91% after the expansions - over four times that of concentration increases - implying that the rate of downstream phosphorus transfer has increased due to CAFO expansion. Our results argue for standards that focus on loads rather than concentrations and monitoring that includes peak events. As agriculture intensifies and extreme rainfall events become more frequent, it becomes increasingly important to limit soil and TP runoff from manure and fertilizer. Siting CAFOs carefully, limiting their size, and improving farming practices in proximity to CAFOs in spring and early summer could considerably reduce nutrient loads.
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Affiliation(s)
- Donald M Waller
- Department of Botany, University of Wisconsin - Madison, 430 Lincoln Drive, Madison, WI, 53706, USA.
| | - Andrew G Meyer
- Marquette University, 1225 W. Wisconsin Ave., Milwaukee, WI, 53233, USA
| | - Zach Raff
- University of Wisconsin-Stout, 712 Broadway St. S, Menomonie, WI, 54751, USA
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4
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Gerry AC. Monitoring House Fly (Diptera: Muscidae) Activity on Animal Facilities. J Insect Sci 2020; 20:15. [PMID: 33135758 PMCID: PMC7604842 DOI: 10.1093/jisesa/ieaa109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Indexed: 04/30/2023]
Abstract
Monitoring house fly (Diptera: Muscidae) activity on animal facilities is a necessary component of an integrated pest management (IPM) program to reduce the negative impacts of these flies. This article describes monitoring methods appropriate for use on animal facilities with discussion of monitoring device use and placement. Action thresholds are presented where these have been suggested by researchers. Sampling precision is an important aspect of a monitoring program, and the number of monitoring devices needed to detect a doubling of fly activity is presented for monitoring methods where this information is available. It should be noted that both action thresholds and numbers of monitoring devices will be different for every animal facility. Suggested action thresholds and numbers of monitoring devices are presented only to provide guidance when initiating a fly monitoring program. Facility managers can adjust these values based upon the fly activity data recorded at their facility. Spot cards are generally recommended as an easy-to-use method for monitoring fly activity for most animal facilities. Fly ribbons or similar sticky devices are recommended where several pest fly species may be abundant and identifying the activity of each species is important, but a sampling period of <7 d may be needed in dusty conditions or when fly density is high. Fly ribbons are not recommended for outdoor use. Insecticide-baited traps may be used in outdoor locations where environmental conditions limit the use of spot cards, fly ribbons, and sticky traps.
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Affiliation(s)
- Alec C Gerry
- Department of Entomology, University of California at Riverside, Riverside, CA
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5
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Rosov KA, Mallin MA, Cahoon LB. Waste nutrients from U.S. animal feeding operations: Regulations are inconsistent across states and inadequately assess nutrient export risk. J Environ Manage 2020; 269:110738. [PMID: 32560983 DOI: 10.1016/j.jenvman.2020.110738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/14/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
Livestock production in the United States has been transformed over the past several decades, largely as a result of widespread development of industrial-scale mass production facilities, termed Animal Feeding Operations (AFOs). These facilities generate massive amounts of animal waste that can concentrate in small areas. Animal wastes from AFOs have led to high levels of nutrients and other pollutants in nearby surface waters, as well as groundwater. The environmental problems associated with these disposal practices have led to federal and state modifications to the rules and regulations governing waste practices. We summarize the federal guidelines for AFO nutrient management, focusing on swine, and compare the regulations of four AFO-rich states in different regions of the USA. Furthermore, we discuss inconsistencies among regulations and regulatory gaps, and identify issues with waste nutrient management practices that lead to environmental degradation in watersheds hosting AFOs. Finally, we address these shortcomings and the need to implement policy updates that would alleviate some of these environmental and human concerns.
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Affiliation(s)
- Kimberley A Rosov
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, N.C., 28409, USA.
| | - Michael A Mallin
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, N.C., 28409, USA
| | - Lawrence B Cahoon
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, N.C., 28403, USA
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6
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Ehleringer JR, Covarrubias Avalos S, Tipple BJ, Valenzuela LO, Cerling TE. Stable isotopes in hair reveal dietary protein sources with links to socioeconomic status and health. Proc Natl Acad Sci U S A 2020; 117:20044-20051. [PMID: 32747534 PMCID: PMC7443935 DOI: 10.1073/pnas.1914087117] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Carbon and nitrogen isotope ratios in hair sampled from 65 communities across the central and intermountain regions of the United States and more intensively throughout 29 ZIP codes in the Salt Lake Valley, Utah, revealed a dietary divergence related to socioeconomic status as measured by cost of living, household income, and adjusted gross income. Corn-fed, animal-derived proteins were more common in the diets of lower socioeconomic status populations than were plant-derived proteins, with individual estimates of animal-derived protein diets as high as 75%; United States towns and cities averaged 57%. Similar patterns were seen across the socioeconomic status spectrum in the Salt Lake Valley. It is likely that corn-fed animal proteins were associated with concentrated animal-feeding operations, a common practice for industrial animal production in the United States today. Given recent studies highlighting the negative impacts of animal-derived proteins in our diets, hair carbon isotope ratios could provide an approach for scaling assessments of animal-sourced foods and health risks in communities across the United States.
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Affiliation(s)
- James R Ehleringer
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112;
- Global Change and Sustainability Center, University of Utah, Salt Lake City, UT 84112
| | | | - Brett J Tipple
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
- Global Change and Sustainability Center, University of Utah, Salt Lake City, UT 84112
| | - Luciano O Valenzuela
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
- Consejo Nacional de Investigaciones Científicas y Técnicas, Laboratorio de Ecología Evolutiva Humana, Universidad Nacional del Centro de la Provincia de Buenos Aires, CP 7631 Quequén, Buenos Aires, Argentina
| | - Thure E Cerling
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
- Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112
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Brown CN, Mallin MA, Loh AN. Tracing nutrient pollution from industrialized animal production in a large coastal watershed. Environ Monit Assess 2020; 192:515. [PMID: 32666139 DOI: 10.1007/s10661-020-08433-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
One of the highest concentrations of swine and poultry concentrated animal feeding operations (CAFOs) in North America is located on the Coastal Plain of North Carolina, in which the Cape Fear River basin is located. The CAFOs produce vast amounts of manure causing loading of nutrients and other pollutants to receiving waters. With the Cape Fear River basin vulnerable to nutrient pollution, as are many other watersheds with CAFOs, δ13C and δ15N stable isotopic signatures were identified from water samples collected within the Northeast Cape Fear, Black, and lower Cape Fear River watersheds to trace nutrient sources and their distribution downstream. The spatial and temporal variability of nutrients and isotopic signatures were also identified to understand water quality impacts of animal waste spraying season and proximity to CAFOs. Our results showed that significantly enriched δ15N signatures characterized sites in close proximity to CAFOs as well as point-source wastewater discharge areas, while the opposite was true for an unimpacted control stream and two estuarine sites. Additionally, the impacted sites yielded significantly (p < 0.05) higher nitrate concentrations than control and estuarine sites. Statistical analyses demonstrated that nitrate concentrations were positively correlated with heavier δ15N signatures, suggesting that animal waste, as well as human wastewater, are relatively more important sources of N to this large watershed than fertilizers from traditional row crop agriculture. Our results also suggested that during appropriate hydrological conditions CAFO-derived N can be detected many kilometers downstream from freshwater sources areas to the estuary.
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Affiliation(s)
- Colleen N Brown
- Department of Earth and Ocean Sciences, University of North Carolina Wilmington, Wilmington, NC, 28409, USA.
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, 28409, USA.
- Rosenstiel School of Marine and Atmospheric Sciences, 4600 Rickenbacker Causeway, Miami, FL, 33149, USA.
| | - Michael A Mallin
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, 28409, USA
| | - Ai Ning Loh
- Department of Earth and Ocean Sciences, University of North Carolina Wilmington, Wilmington, NC, 28409, USA
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, 28409, USA
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8
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Baker J, Battye WH, Robarge W, Pal Arya S, Aneja VP. Modeling and measurements of ammonia from poultry operations: Their emissions, transport, and deposition in the Chesapeake Bay. Sci Total Environ 2020; 706:135290. [PMID: 31838459 DOI: 10.1016/j.scitotenv.2019.135290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 10/09/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
The goal of this study is to determine how much ammonia/nitrogen is being deposited to the Maryland Eastern Shore land and the Chesapeake Bay from poultry operations on Maryland's Eastern Shore. We simulated the fate of ammonia/nitrogen emitted (using emission factors from the U.S. EPA in conjunction with Carnegie-Mellon University) from 603 poultry facilities using the air quality model, AERMOD. The model domain was approximately 134 km by 230 km (and covers the full land area of Maryland's Eastern Shore), with a horizontal resolution of 2 km by 2 km. Ammonia concentration observations were made at 23 sites across Maryland's Eastern Shore during two periods (September and October 2017) in order to calibrate the model. An ammonia deposition velocity of 2.4 cm/sec was selected based on the sensitivity analysis of results for the simulation of a large poultry facility, and this value fell within the range of measurements reported in the scientific literature downwind of Concentrated Animal Feeding Operations (CAFOs). The ammonia deposition velocity of 2.4 cm/s leads to an estimated total annual ammonia deposition of 11,100 Megagrams/year (10,600 Mg/yr deposition to land, and 508 Mg/yr deposition to water (1 Mg = 1,000,000 g = 1.1023 US Tons)). In addition, model simulations indicate that ~72.4% of ammonia emissions from poultry animal feeding operations would be deposited within the modeling domain. However, this deposited ammonia/nitrogen may be transported through waterways from the land mass and ground water to the Chesapeake Bay. A comprehensive sensitivity analysis of the assumed ammonia deposition velocity (ranging from 0.15 to 3.0 cm/s) on estimated ammonia annual deposition is provided. Using the lower limit of an ammonia deposition velocity of 0.15 cm/s gives much smaller estimated total annual ammonia deposition of 2,040 Mg/yr (1,880 Mg/yr deposition to land and 163 Mg/yr deposition to water).
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Affiliation(s)
- Jordan Baker
- Department of Marine, Earth, and Atmospheric Sciences North Carolina State University, Raleigh, NC 27695-8208, United States
| | - William H Battye
- Department of Marine, Earth, and Atmospheric Sciences North Carolina State University, Raleigh, NC 27695-8208, United States
| | - Wayne Robarge
- Department of Marine, Earth, and Atmospheric Sciences North Carolina State University, Raleigh, NC 27695-8208, United States
| | - S Pal Arya
- Department of Marine, Earth, and Atmospheric Sciences North Carolina State University, Raleigh, NC 27695-8208, United States
| | - Viney P Aneja
- Department of Marine, Earth, and Atmospheric Sciences North Carolina State University, Raleigh, NC 27695-8208, United States.
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9
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Tagne GV, Dowling C. Land-use controls on nutrient loads in aquifers draining agricultural and mixed-use karstic watersheds. Environ Monit Assess 2020; 192:168. [PMID: 32034511 DOI: 10.1007/s10661-020-8126-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/28/2020] [Indexed: 06/10/2023]
Abstract
Agricultural nonpoint source pollution from the upper areas of the Upper Mississippi, Missouri, and Ohio River basins accounts for the majority of the excess nitrogen that leads to the Gulf of Mexico's hypoxic zone. However, agriculture landscapes across the USA, Europe, and China are undergoing major changes related to the proliferation of confined animal feeding operations (CAFOs) that account for a greater proportion of point source contamination. Mitigating long-term nutrient inputs at a large scale (Mississippi River Basin) requires understanding these microscale changes at the small watershed level (less than 100 km2). To assess the control of land-use and subsurface hydrological processes on nutrient fate and transport, temporal patterns in nutrient concentrations in a mixed land-use karstic watershed were analyzed. To assess the control of differential land-use sources on total inorganic nitrogen (TIN) loads within the watershed, 4 months of weekly water sampling was performed at a spring location and at two underground conduit locations. The observed temporal variations in nutrient concentrations are primarily associated with seasonal changes in land-use associated with corn growth. Data show that land-use sources explain much of the temporal variability of TIN at the spring when weighted against the hydrological factor. End-member-mixing analysis of dissolved organic carbon (DOC) shows a progressive increase in the contribution of DOC-enriched sources and a more labile form of carbon toward the harvest time. Overall, during high flow, nonpoint source infiltration from manure-fertilized croplands in the northern branch (NB) dominate DOC loads. Because conduit-dominated karstic aquifers are more susceptible to contamination from direct and fast (< 7 h) subsurface infiltration during late summer rainfall period (July to August), a slight advance in the timing of manure application could substantially reduce nutrient loads to local groundwater. A combined evaluation of subsurface hydrological processes and land-use factors controlling nutrients at the scale of small watersheds is crucial to developing site-specific nutrient management plans and managing the Gulf of Mexico's hypoxic zone.
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Affiliation(s)
- G V Tagne
- Department of Geology and Environmental Science, Wheaton College, 501 College Ave, Wheaton, IL, 60187, USA.
| | - C Dowling
- Department of Geological Sciences, Ball State University, 2000 W University Ave, Muncie, IN, 47306, USA
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10
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Jones S, Anthony TR, Sousan S, Altmaier R, Park JH, Peters TM. Evaluation of a Low-Cost Aerosol Sensor to Assess Dust Concentrations in a Swine Building. Ann Occup Hyg 2016; 60:597-607. [PMID: 26944922 DOI: 10.1093/annhyg/mew009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 01/19/2016] [Indexed: 01/08/2023]
Abstract
Exposure to dust is a known occupational hazard in the swine industry, although efforts to measure exposures are labor intensive and costly. In this study, we evaluated a Dylos DC1100 as a low-cost (~$200) alternative to assess respirable dust concentrations in a swine building in winter. Dust concentrations were measured with collocated monitors (Dylos DC1100; an aerosol photometer, the pDR-1200; and a respirable sampler analyzed gravimetrically) placed in two locations within a swine farrowing building in winter for 18-24-h periods. The particle number concentrations measured with the DC1100 were converted to mass concentration using two methods: Physical Property Method and Regression Method. Raw number concentrations from the DC1100 were highly correlated to mass concentrations measured with the pDR-1200 with a coefficient of determination (R (2)) of 0.85, indicating that the two monitors respond similarly to respirable dust in this environment. Both methods of converting DC1100 number concentrations to mass concentrations yielded strong linear relationships relative to that measured with the pDR-1200 (Physical Property Method: slope = 1.03, R (2) = 0.72; Regression Method: slope = 0.72, R (2) = 0.73) and relative to that measured gravimetrically (Physical Property Method: slope = 1.08, R (2) = 0.64; Regression Method: slope = 0.75, R (2) = 0.62). The DC1100 can be used as a reasonable indicator of respirable mass concentrations within a CAFO and may have broader applicability to other agricultural and industrial settings.
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Affiliation(s)
- Samuel Jones
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - T Renée Anthony
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - Sinan Sousan
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - Ralph Altmaier
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - Jae Hong Park
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - Thomas M Peters
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
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11
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Luo Y, Guo W, Ngo HH, Nghiem LD, Hai FI, Zhang J, Liang S, Wang XC. A review on the occurrence of micropollutants in the aquatic environment and their fate and removal during wastewater treatment. Sci Total Environ 2014; 473-474:619-41. [PMID: 24394371 DOI: 10.1016/j.scitotenv.2013.12.065] [Citation(s) in RCA: 1695] [Impact Index Per Article: 169.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 12/17/2013] [Accepted: 12/17/2013] [Indexed: 05/20/2023]
Abstract
Micropollutants are emerging as a new challenge to the scientific community. This review provides a summary of the recent occurrence of micropollutants in the aquatic environment including sewage, surface water, groundwater and drinking water. The discharge of treated effluent from WWTPs is a major pathway for the introduction of micropollutants to surface water. WWTPs act as primary barriers against the spread of micropollutants. WWTP removal efficiency of the selected micropollutants in 14 countries/regions depicts compound-specific variation in removal, ranging from 12.5 to 100%. Advanced treatment processes, such as activated carbon adsorption, advanced oxidation processes, nanofiltration, reverse osmosis, and membrane bioreactors can achieve higher and more consistent micropollutant removal. However, regardless of what technology is employed, the removal of micropollutants depends on physico-chemical properties of micropollutants and treatment conditions. The evaluation of micropollutant removal from municipal wastewater should cover a series of aspects from sources to end uses. After the release of micropollutants, a better understanding and modeling of their fate in surface water is essential for effectively predicting their impacts on the receiving environment.
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Affiliation(s)
- Yunlong Luo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Long Duc Nghiem
- Strategic Water Infrastructure Laboratory, School of Civil Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Faisal Ibney Hai
- Strategic Water Infrastructure Laboratory, School of Civil Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Xiaochang C Wang
- Key Lab of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China
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12
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Koneswaran G, Nierenberg D. Global farm animal production and global warming: impacting and mitigating climate change. Environ Health Perspect 2008; 116:578-82. [PMID: 18470284 PMCID: PMC2367646 DOI: 10.1289/ehp.11034] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Accepted: 01/27/2008] [Indexed: 05/04/2023]
Abstract
BACKGROUND The farm animal sector is the single largest anthropogenic user of land, contributing to many environmental problems, including global warming and climate change. OBJECTIVES The aim of this study was to synthesize and expand upon existing data on the contribution of farm animal production to climate change. METHODS We analyzed the scientific literature on farm animal production and documented greenhouse gas (GHG) emissions, as well as various mitigation strategies. DISCUSSIONS An analysis of meat, egg, and milk production encompasses not only the direct rearing and slaughtering of animals, but also grain and fertilizer production for animal feed, waste storage and disposal, water use, and energy expenditures on farms and in transporting feed and finished animal products, among other key impacts of the production process as a whole. CONCLUSIONS Immediate and far-reaching changes in current animal agriculture practices and consumption patterns are both critical and timely if GHGs from the farm animal sector are to be mitigated.
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Affiliation(s)
- Gowri Koneswaran
- Humane Society of the United States, Farm Animal Welfare, Washington, DC 20037, USA.
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