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Vedenin AA, Kröncke I, Beck AJ, Bodenbinder A, Chrysagi E, Gräwe U, Kampmeier M, Greinert J. Spatial structure and biodiversity of macrofauna around marine munition dumpsites - A case study from the Baltic Sea. Mar Pollut Bull 2024; 198:115865. [PMID: 38070398 DOI: 10.1016/j.marpolbul.2023.115865] [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: 10/02/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 01/05/2024]
Abstract
Coastal German waters contain about 1.6 million tons of dumped munition, mostly left after World Wars. This study investigated the benthic macrofauna around the 'Kolberger Heide' munition dumpsite (Baltic Sea). A total of 93 macrofauna grab samples were obtained in the proximity of the munition dumpsite and in reference areas. Environmental variables analysed included the latitude/longitude, depth, terrain ruggedness, sediment grainsize distribution, TNT concentration in the bottom water and distance to the centre of munition dumpsite. The overall abundance, biomass and diversity varied among these groups, though demonstrated no clear differences regarding the proximity to munition and modelled near-bottom dissolved TNT. Among individual taxa, however, a total of 16 species demonstrated significant correlation with TNT concentration. Moreover, TNT may serve as a predictor for the distribution of three species: molluscs Retusa truncatula, Varicorbula gibba and polychaete Spio goniocephala. Possible reasons for the species distribution including their biological traits are discussed.
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Affiliation(s)
- A A Vedenin
- Senckenberg am Meer, Dept. Marine Research, Wilhelmshaven, Germany; Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University, Oldenburg, Germany.
| | - I Kröncke
- Senckenberg am Meer, Dept. Marine Research, Wilhelmshaven, Germany; Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University, Oldenburg, Germany
| | - A J Beck
- GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
| | - A Bodenbinder
- GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
| | - E Chrysagi
- Leibniz Institute for Baltic Sea Research, Warnemünde, Germany
| | - U Gräwe
- Leibniz Institute for Baltic Sea Research, Warnemünde, Germany
| | - M Kampmeier
- GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
| | - J Greinert
- GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
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Cassidy CE, Beck AJ, Conway A, Demery Varin M, Laur C, Lewis KB, Ramage ER, Nguyen T, Steinwender S, Ormel I, Stratton L, Shin HD. Using an integrated knowledge translation or other research partnership approach in trainee-led research: a scoping review protocol. BMJ Open 2021; 11:e043756. [PMID: 34035094 PMCID: PMC8154946 DOI: 10.1136/bmjopen-2020-043756] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Collaborative research approaches, such as co-production, co-design, engaged scholarship and integrated knowledge translation (IKT), aim to bridge the evidence to practice and policy gap. There are multiple benefits of collaborative research approaches, but studies report many challenges with establishing and maintaining research partnerships. Researchers often do not have the opportunity to learn how to build collaborative relationships, and most graduate students do not receive formal training in research partnerships. We are unlikely to make meaningful progress in strengthening graduate and postgraduate training on working collaboratively with the health system until we have a better understanding of how students are currently engaging in research partnership approaches. In response, this scoping review aims to map and characterise the evidence related to using an IKT or other research partnership approach from the perspective of health research trainees. METHODS AND ANALYSIS We will employ methods described by the Joanna Briggs Institute and Arksey and O'Malley's framework for conducting scoping reviews. The reporting will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for scoping reviews checklist. We will include both published and unpublished grey literature and search the following databases: MEDLINE, Embase, CINAHL, PsycINFO, ProQuest Dissertations & Theses Global databases, Google Scholar and websites from professional bodies and other organisations. Two reviewers will independently screen the articles and extract data using a standardised data collection form. We will narratively describe quantitative data and conduct a thematic analysis of qualitative data. We will map the IKT and other research partnership activities onto the Knowledge to Action cycle and IAP2 Levels of Engagement Framework. ETHICS AND DISSEMINATION No ethical approval is required for this study. We will share the results in a peer-reviewed, open access publication, conference presentation and stakeholder communications.
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Affiliation(s)
| | - Amy Jane Beck
- Faculty of Nursing, University of Calgary, Calgary, Alberta, Canada
| | | | - Melissa Demery Varin
- School of Nursing, University of Ottawa Faculty of Health Sciences, Ottawa, Ontario, Canada
| | - Celia Laur
- Institute for Health System Solutions and Virtual Care, Women's College Hospital, Toronto, Ontario, Canada
| | - Krystina B Lewis
- School of Nursing, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Emily R Ramage
- School of Health Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Tram Nguyen
- Centre for Implementation Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
- School of Epidemiology & Public Health, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandy Steinwender
- Faculty of Health Sciences, Western University, London, Ontario, Canada
| | - Ilja Ormel
- Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Lillian Stratton
- School of Nursing, Dalhousie University, Halifax, Nova Scotia, Canada
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Beck AJ, Duffett-Leger L, Raffin Bouchal S, Ferber R, Ward T. 0917 Designing a Wearable Technology-Based Sleep Intervention To Support Sleep Health Among Adolescents: Using a Participatory Design Approach. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Sleep problems during adolescence are increasingly common and have been associated with adverse physical and psychological health outcomes. Efforts to improve insufficient sleep among adolescents have resulted in increased sleep knowledge and temporary enhancements in sleep hygiene. Good sleep hygiene is established through the development of daily routines that support healthy sleep. Wearable technology offers a potential solution whereby adolescents can acquire and manage healthy sleep habits. In this study, we are co-designing with adolescents a prototype intervention using wearable technology to promote sustained improvements in their sleep hygiene.
Methods
Guided by participatory design approaches, the ongoing multi-phase mixed methods study is currently being conducted in a metropolitan area in western Canada. In phase 1, sleep data is being collected from a sample of 30 adolescent-parent dyads using wearable sensors (Actigraphy watches) and self-report sleep measures (questionnaires about sleep quality, hygiene, and beliefs and attitudes, as well as their general health) over a 10-day period. In phases 2 and 3, individual interviews and iterative user interface design sessions will be conducted with 25 adolescents.
Results
To date, thirteen adolescents-parent dyads (13-17 years, 9 females; 39-56 years, 11 females) have completed phase 1 of our study. Data analysis is currently being conducted to evaluate sleep onset/offset, total sleep time, wake after sleep onset, sleep efficiency, and sleep schedule differences between adolescents and their parents. Ten adolescents have completed individual interviews in phase 2 of the study. Preliminary qualitative data suggests that youth are aware of the importance of sleep to their overall health. However, they struggle with identifying credible information to act on from the various and sometimes conflicting sources (e.g. online, friends, family).
Conclusion
We anticipate that co-designing a wearable solution with adolescents will lead to a sleep intervention that is more relevant, persuasive, and useful in supporting their sleep health.
Support
This work is supported by the Sensor Technology in Monitoring Movement STiMM Program.
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Affiliation(s)
- A J Beck
- Faculty of Nursing, University of Calgary, Calgary, AB, CANADA
| | - L Duffett-Leger
- Faculty of Nursing, University of Calgary, Calgary, AB, CANADA
| | | | - R Ferber
- Faculty of Nursing, University of Calgary, Calgary, AB, CANADA
- Faculty of Kinesiology, University of Calgary, Calgary, AB, CANADA
| | - T Ward
- University of Washington, School of Nursing, Seattle, WA
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4
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Beck AJ. 1 The integrity of the scapholunate ligament in competitive divers. Br J Sports Med 2019. [DOI: 10.1136/bjsports-2019-basemabs.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AimWrist pain and injury is common condition in competitive, elite divers. Literature has shown that divers sustain high impacts of force through the wrists on water entry. It is likely this and the repetitive nature of the sport that results in wrist injuries.1 2 No studies have yet looked at the structures injured when divers have wrist pain. This study was conducted to ascertain the demographics of the diving population within the United Kingdom at competitive level and how many of them experienced wrist pain. It was also used to investigate if one of the crucial stabilising ligaments in the wrist was disrupted, the scapholunate ligament (SLL).MethodsData was collected at the British Diving Championships, 2018. 51 divers were eligible for inclusion and 43 divers took part. Two divers were excluded due to previous wrist surgery. Participants completed a questionnaire on diving career to date and wrist injuries. They then underwent wrist examination using Watson’s test and ultrasound imaging of both SLL.ResultsThis study found that 78% of divers had disruption of one or both SLL. Of these, 65.9% had disruption of the ligament in the supporting hand rather than the entry hand. No significant difference was found between springboard and platform divers. Those divers who taped were found to reduce ligament disruption by 28 times over those who did not (OR 27.9, 95% CI 3.31 to 234, P=0.002). It was demonstrated that Watson’s test has poor sensitivity and specificity, with reasonable positive predicted value.ConclusionSpringboard and Platform divers at a competitive level are at high risk of SLL disruption. The supporting hand is more at risk than the entry hand. Taping confers a significant reduction in risk of disruption and should be used to prevent injury. Watson’s test is a poor clinical test in diagnosis of SLL disruption.ReferencesHarrison S, Cohen R, Cleary P, et al. A coupled biomechanical-smoothed particle hydrodynamics model for predicting the loading on the body during elite platform diving. Appl Math Model 2015;40:3812–31.Prien A, Mountjoy M, Miller J, et al. Injury and illness in aquatic sport: how high is the risk? A comparison of results from three FINA world championships. Br J Sports Med 2016;51:277–82.
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Klein NJ, Beck AJ, Hutchins DA, Sañudo-Wilhelmy SA. Regression modeling of the North East Atlantic Spring Bloom suggests previously unrecognized biological roles for V and Mo. Front Microbiol 2013; 4:45. [PMID: 23483024 PMCID: PMC3591785 DOI: 10.3389/fmicb.2013.00045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 10/03/2012] [Accepted: 02/19/2013] [Indexed: 11/13/2022] Open
Abstract
In order to identify the biogeochemical parameters controlling pCO2, total chlorophyll a, and dimethyl sulfide (DMS) concentrations during the North East Atlantic Spring Bloom (NASB), we used previously unpublished particulate and dissolved elemental concentrations to construct several linear regression models; first by hypothesis-testing, and then with exhaustive stepwise linear regression followed by leave-one-out cross-validation. The field data was obtained along a latitudinal transect from the Azores Islands to the North Atlantic, and best-fit models (determined by lowest predictive error) of up to three variables are presented. Total chlorophyll a is predicted best by biomass (POC, PON) parameters and by pigments characteristic of picophytoplankton for the southern section of the sampling transect (from the Azores to the Rockhall-Hatton Plateau) and coccolithophores in the northern portion (from the Rockhall-Hatton Plateau to the Denmark Strait). Both the pCO2 and DMS models included variables traditionally associated with the development of the NASB such as mixed-layer depth and with Fe, Si, and P-deplete conditions (dissolved Fe, dissolved and biogenic silica, dissolved PO(3-)4). However, the regressions for pCO2 and DMS also include intracellular V and Mo concentrations, respectively. Mo is involved in DMS production as a cofactor in dimethylsulfoxide reductase. No significant biological role for V has yet been determined, although intracellular V is significantly correlated (p-value <0.05) with biogenic silica (R(2) = 0.72) and total chlorophyll a (R(2) = 0.49) while the same is not true for its biogeochemical analogue Mo, suggesting active uptake of V by phytoplankton. Our statistical analysis suggests these two lesser-studied metals may play more important roles in bloom dynamics than previously thought, and highlights a need for studies focused on determining their potential biological requirements and cell quotas.
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Affiliation(s)
- Nick J Klein
- Department of Earth Sciences, University of Southern California Los Angeles, CA, USA
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Garcia-Orellana J, Cochran JK, Bokuniewicz H, Yang S, Beck AJ. Time-series sampling of 223Ra and 224Ra at the inlet to Great South Bay (New York): a strategy for characterizing the dominant terms in the Ra budget of the bay. J Environ Radioact 2010; 101:582-588. [PMID: 20106570 DOI: 10.1016/j.jenvrad.2009.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 12/16/2009] [Accepted: 12/24/2009] [Indexed: 05/28/2023]
Abstract
Ra isotopes are a powerful tool for quantifying the flux of submarine groundwater discharge (SGD) into the sea. Previous studies of 223Ra and 224Ra mass balances in coastal embayments have shown that the Ra balance is dominated by supply via SGD, exchange with the open ocean and radioactive decay. The current study shows that a single time series over a tidal cycle at the principal inlet to Great South Bay (NY, US) is sufficient to determine the net flux of Ra across the inlet, and also can be used to estimate the decay of short-lived Ra in the bay. Estimates of the net Ra flux obtained from a single tidal time-series by using three different approaches agree with those determined from a more time-consuming survey of Ra within the bay, and may represent a first step of estimating SGD in bays and coastal lagoons.
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Affiliation(s)
- J Garcia-Orellana
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA.
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Abstract
Hazard analysis by critical control points (HACCP) is a systematic approach to the identification, assessment and control of hazards. Effective HACCP requires the consideration of all hazards, i.e., chemical, microbiological and physical. However, to-date most 'in-place' HACCP procedures have tended to focus on the control of microbiological and physical food hazards. In general, the chemical component of HACCP procedures is either ignored or limited to applied chemicals, e.g., food additives and pesticides. In this paper we discuss the application of HACCP to a broader range of chemical hazards, using organic chemical contaminants as examples, and the problems that are likely to arise in the food manufacturing sector. Chemical HACCP procedures are likely to result in many of the advantages previously identified for microbiological HACCP procedures: more effective, efficient and economical than conventional end-point-testing methods. However, the high costs of analytical monitoring of chemical contaminants and a limited understanding of formulation and process optimisation as means of controlling chemical contamination of foods are likely to prevent chemical HACCP becoming as effective as microbiological HACCP.
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Affiliation(s)
- K Ropkins
- Department of Agricultural Sciences, Imperial College, University of London, Wye, Ashford, Kent, TN25 5AH, United Kingdom
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8
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Abstract
Hazard Analysis Critical Control Points (HACCP) is a systematic approach to the identification, assessment, and control of hazards that was developed as an effective alternative to conventional end-point analysis to control food safety. It has been described as the most effective means of controlling foodborne diseases, and its application to the control of microbiological hazards has been accepted internationally. By contrast, relatively little has been reported relating to the potential use of HACCP, or HACCP-like procedures, to control chemical contaminants of food. This article presents an overview of the implementation of HACCP and discusses its application to the control of organic chemical contaminants in the food chain. Although this is likely to result in many of the advantages previously identified for microbiological HACCP, that is, more effective, efficient, and economical hazard management, a number of areas are identified that require further research and development. These include: (1) a need to refine the methods of chemical contaminant identification and risk assessment employed, (2) develop more cost-effective monitoring and control methods for routine chemical contaminant surveillance of food, and (3) improve the effectiveness of process optimization for the control of chemical contaminants in food.
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Affiliation(s)
- K Ropkins
- Department of Biology, Imperial College at Wye, Ashford, Kent, United Kingdom.
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Gove L, Nicholson FA, Cook HF, Beck AJ. Comparison of the effect of surface application and subsurface incorporation of enhanced treated biosolids on the leaching of heavy metals and nutrients through sand and sandy loam soils. Environ Technol 2002; 23:189-198. [PMID: 11950071 DOI: 10.1080/09593332508618421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Use of enhanced treated biosolids such as composted and dried, mesophilic anaerobically digested, dewatered (MADD) biosolids is becoming more popular. This is mainly in response to concerns over the potential for pathogens to enter the food chain. There is, therefore, a need to investigate how enhanced treatment, and methods by which these biosolids are applied, affects the leaching potential of metal and nutrients to ensure that water quality is not compromised. MADD cake (fresh, dried and composted) and MAD liquid sludge were applied by surface application and subsurface incorporation to sand (typic quartzipsamments, %OM = 3.0, pH = 6.5), sandy loam (typic hapludalf, %OM = 4.8, pH = 7.6) and silversand 'repacked semi-structured cores' (0.2 m by 0.1 m diameter) at rates equivalent to 250 kg N ha(-1) yr(-1). Leaching of Zn, Cu, Pb, Ni, N and P was investigated following application of five 8 h simulated rainfall events (4.9 mm h(-1)) in the laboratory. Little difference was observed between leaching of metals and nutrients from soils amended with enhanced treated biosolids (dried and composted MADD cakes) compared with conventional biosolids (fresh MADD cake and MAD liquid). Subsurface incorporation increased the risk of P and metal leaching compared with surface application. Nitrate losses were independent of application method. Similar nutrient losses from control and amended cores indicated that the leaching was derived predominantly from the soil clay and organic matter complexes. Evidence for attenuation of biosolids-derived metals and P by soil-derived clay and/or organic matter was found. Water balance data showed that hydrological regimes of each core were comparable and unlikely to account for observed differences in leaching losses.
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Affiliation(s)
- L Gove
- Dept of Agricultural Sciences, Imperial College, University of London, Ashford, Kent, UK
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10
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Cooke CM, Gove L, Nicholson FA, Cook HF, Beck AJ. Effect of drying and composting biosolids on the movement of nitrate and phosphate through repacked soil columns under steady-state hydrological conditions. Chemosphere 2001; 44:797-804. [PMID: 11482671 DOI: 10.1016/s0045-6535(00)00293-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Effects of two "enhanced" treatments (drying and composting mesophilic anaerobically digested (MAD) biosolid) on nutrient leaching were investigated. Repacked sandy or sandy loam textured soil cores amended with fresh, dried and composted MAD biosolid (250 kg N ha(-1)), were investigated under steady-state hydrological conditions. Two 24 h, 4.5 mm h(-1) rainfall events, with a 14-day interval, were simulated using water-tracers. Losses of nitrate from the sandy loam soil during rainfall event 1 (43.9-68.0 mg kg(-1)) were significantly greater (P < or = 0.05) than during event 2 (6.4-11.9 mg kg(-1)). Phosphate losses were significantly greater (P < or = 0.05) during event 2 (up to 0.30 mg kg(-1)) compared to the first (< 0.05 mg kg(-1)). The sand soil showed similar effects. Losses of nitrate-N (percentage of total N applied) from the sand soil were small (around 0.06% for fresh/dried and 0.63% for composted MAD biosolids). Losses of nitrate-N from the sandy loam soil were greater; 4% for fresh and dried and 3% for composted MAD biosolids. This research showed that drying MAD biosolid had little impact on nitrate and phosphate losses from soil compared to fresh MAD biosolid. The effect of composting MAD biosolid on nutrient losses was more variable.
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Affiliation(s)
- C M Cooke
- Environmental Processes and Water Technology Group, The T H. Huxley School, Imperial College of Science, Technology and Medicine, London, UK.
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11
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Gove L, Cooke CM, Nicholson FA, Beck AJ. Movement of water and heavy metals (Zn, Cu, Pb and Ni) through sand and sandy loam amended with biosolids under steady-state hydrological conditions. Bioresour Technol 2001; 78:171-179. [PMID: 11333037 DOI: 10.1016/s0960-8524(01)00004-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
New guidelines for using biosolids in UK agriculture favour the use of enhanced treated biosolids, such as dried and composted cakes, due to concerns about the potential for transfer of pathogens into the food chain. However, there is a need to ensure that their use is environmentally acceptable and does not increase the risk to potable water supplies or the food chain from other contaminants such as heavy metals and xenobiotic organic chemicals. The objective of this study was to determine whether the use of composted and dried mesophilic anaerobically digested dewatered (MADD) biosolids would increase the risk of heavy metal leaching from cultivated horizons when compared to more conventionally used MADD cake. Three biosolids (MADD sewage sludge cake - fresh, dried and composted) were mixed with a sand (typic quartzipsamments, %OM = 3.0, pH = 6.5) or a sandy loam (typic hapludalf, %OM = 4.8, pH = 7.6) at an application rate equivalent to 250 kg N/ha/y resulting in loadings of approximately Zn: 6 microg, Cu: 2 microg, Pb: 5 microg and Ni: 0.2 microg/g of soil dry weight basis. These amended soils were repacked into columns (0.4 m by 0.1 m internal diameter) and leaching of Zn, Cu, Pb and Ni was investigated following application of two 24 h simulated rainfall events of 4.5 mm/h. Water balance data and the use of conservative tracers (Cl- and Br ) showed that the hydrological regimes of each core were comparable and, thus, unlikely to account for differences in metal leaching observed. Although no significant difference (P = 0.05) was observed between biosolid amended and control soils, those amended with composted sludge consistently gave higher loss of all metals than did the control soils. Total losses of metals from compost amended soil over the two rainfall events were in the ranges, Zn:20.5-58.2, Cu:9.0-30.5, Pb:24.2-51.2 and Ni:16.0-39.8 microg metal/kg amended soil, compared with Zn:16.4-41.1, Cu:6.2-25.3, Pb:16.9-41.7, and Ni:3.7-25.4 microg metal/kg soil from the control soils. Losses of Zn, Cu, Pb and Ni from fresh MADD cake amended soils (19.8-41.3, 3.2-25.8, 21.6-51.6 and 7.6-36.5 microg metal/kg amended soil, respectively) and from dry MADD cake amended soils (10.7-36.7, 1.8-23.8, 21.2-51.2 and 6.8-39.2 microg metal/kg amended soil, respectively) were similar to the controls. Generally, quantities of metals leached followed the order Zn = Pb > Cu > Ni, which was consistent with the levels of metals in the original sludge/soil mixtures. These results suggest that composting or drying MADD biosolids is unlikely to increase the risk of groundwater contamination when compared to the use of MADD cake; therefore, the changes in UK sludge use in agriculture guidelines are satisfactory in this respect.
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Affiliation(s)
- L Gove
- Department of Biology, Imperial College at Wye, University of London, Kent, UK.
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12
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Canet R, Birnstingl JG, Malcolm DG, Lopez-Real JM, Beck AJ. Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by native microflora and combinations of white-rot fungi in a coal-tar contaminated soil. Bioresour Technol 2001; 76:113-117. [PMID: 11131793 DOI: 10.1016/s0960-8524(00)00093-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four white-rot fungi (Phanerochaete chrysosporium IMI 232175, Pleurotus ostreatus from the University of Alberta Microfungus Collection IMI 341687, Coriolus versicolor IMI 210866 and Wye isolate #7) and all possible combinations of two or more of these fungi, were incubated in microcosms containing wheat straw and non-sterile coal-tar contaminated soil to determine their potential to degrade polycyclic aromatic hydrocarbons (PAHs). Biotic and abiotic controls were prepared similarly and PAH concentrations remaining in each microcosm were determined after 8, 16 and 32 weeks by GC-MS following extraction with dichloromethane. The greatest PAH losses were in the biotic control, compared to small or negligible differences in microcosms inoculated with one or more fungi. These results suggest that in the biotic control native microorganisms colonised the straw added as organic substrate and degraded PAH as an indirect consequence of their metabolism. By contrast, in other microcosms, colonisation of straw by the natural microflora was inhibited because the straw was previously inoculated with fungi. Soil cultures prepared at the end of the experiment showed that though introduced fungi were still alive, they were unable to thrive and degrade PAH in such a highly contaminated soil and remained in a metabolically inactive form.
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Affiliation(s)
- R Canet
- Department of Biology, Imperial College of Wye, Wye, Ashford, Kent TN25 5AH, UK.
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Daw R, Candan S, Beck AJ, Devlin AJ, Brook IM, MacNeil S, Dawson RA, Short RD. Plasma copolymer surfaces of acrylic acid/1,7 octadiene: surface characterisation and the attachment of ROS 17/2.8 osteoblast-like cells. Biomaterials 1998; 19:1717-25. [PMID: 9856582 DOI: 10.1016/s0142-9612(98)00080-5] [Citation(s) in RCA: 131] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The purpose of this study was: (a) to examine the effect of plasma-gas composition on plasma polymer oxygen/carbon (O/C) ratio, functional group composition and stability in water, and then (b) to examine cell attachment to surfaces containing different concentrations of O/C and functional groups. Oxygen-functionalised surfaces were deposited by means of the plasma copolymerisation of acrylic acid/1,7-octadiene. The use of a diluent hydrocarbon allowed the deposition of surfaces with a range of O/C concentrations. Plasma copolymer surfaces were characterised by X-ray photoelectron spectroscopy (XPS). Changes in functional group composition with % acrylic acid monomer and the non-dispersive and dispersive parts of the surface energy of these plasma copolymers were measured. The solubility of the plasma copolymers was assessed by means of XPS. The degree of attachment of ROS 17/2.8 osteoblast-like cells to plasma copolymer surfaces deemed to be 'stable' in aqueous medium was measured. Tissue culture polystyrene (TCPS) was included as a control. Attachment was found to be greatest to the plasma copolymer surface with an O/C of 0.11. This surface had a carboxylic acid concentration of ca. 3%. Attachment did not correlate with increased surface wettability (i.e. the non-dispersive component of the surface energy).
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Affiliation(s)
- R Daw
- Centre for Biomaterials and Tissue Engineering, Department of Engineering Materials, University of Sheffield, UK
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Beck AJ, Johnson DL, Jones KC. The form and bioavailability of non-ionic organic chemicals in sewage sludge-amended agricultural soils. Sci Total Environ 1996; 185:125-149. [PMID: 8643957 DOI: 10.1016/0048-9697(96)05047-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The application of sewage sludges to agricultural land may increase the concentrations of many toxic organic chemicals in soils which could have adverse effects on wildlife and human health if these compounds enter foodchains. Chlorobenzenes (CBs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) are amongst those compounds currently receiving most attention. The "form' in which these, and other organic chemicals, are present in soils and their potential to be lost by various processes including leaching, volatilisation and (bio)degradation is shown to be dependent on the physicochemical characteristics of the soil and sewage sludge, environmental conditions and the properties of the chemicals themselves. The distinction is made between those compounds that are labile, reversibly sorbed and irreversibly sorbed by sewage sludge-amended soils. The implications of the form in which the chemicals are present in soil for their "availability' to transfer from the soil to bacteria, fungi, earthworms, grazing livestock and food crops followed by the potential for further transfers, metabolism or bioaccumulation are discussed. The importance of the timing and method of sewage sludge application to soil on "form' and "availability' are also considered.
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Affiliation(s)
- A J Beck
- Institute of Environmental and Biological Sciences, Lancaster University, UK
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Alcock RE, Bacon J, Bardget RD, Beck AJ, Haygarth PM, Lee RG, Parker CA, Jones KC. Persistence and fate of polychlorinated biphenyls (PCBs) in sewage sludge-amended agricultural soils. Environ Pollut 1996; 93:83-92. [PMID: 15091372 DOI: 10.1016/0269-7491(96)00002-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/1995] [Accepted: 12/18/1995] [Indexed: 05/24/2023]
Abstract
Four metal enriched sewage sludges containing different concentrations of polychlorinated biphenyls (PCBs) were applied to two field soils in the UK in 1968. Samples of the sludges, sludge-amended soils and soils from untreated control plots were stored and analysed retrospectively. Sludge concentrations ranged from 1 to 7 mg SigmaPCB kg(-1). The pattern of PCBs was similar in three of the four sludges, with congeners 14, 18, 28 and 52 present at the highest concentrations. The fourth sludge contained higher amounts of congeners 149, 153, 138 and 180. SigmaPCB concentrations in control plot soil have declined over the last 20 years, indicating a reduction in atmospheric deposition inputs of PCBs to the soil. SigmaPCB concentrations also declined on the sludge-amended plots, reaching control plot concentrations (30-60 microg SigmaPCB kg(-1)) in the late-1980s. Half-lives ranged from < 1 to 8.5 years for congeners 18, 28 and SigmaPCB. Biodegradation and/or the formation of reversibly sorbed soil PCB residues could not account for the losses observed. Volatilisation is implicated as the most important loss process on both the control and sludge-amended plots. Using the fugacity approach, congener concentrations in soils at Luddington were predicted still to have not reached equilibrium with the air. Further losses to the atmosphere are likely.
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Affiliation(s)
- R E Alcock
- Institute of Environmental and Biological Sciences, Lancaster University, Lancaster LA1 4YQ, UK
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Beck AJ, Jones KC. Kinetic constraints on theIn-situ remediation of soils contaminated with organic chemicals. Environ Sci Pollut Res Int 1995; 2:244-252. [PMID: 24234698 DOI: 10.1007/bf02986778] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cleanup of contaminated soils to comply with soil quality limits currently receives much interest.In-situ remediation of contaminated soils relies on the ability of the techniques employed to enhance the rate of release of contaminants from the soil-sorbed and nonaqueous phase liquid (NAPL) phases into the aqueous or gaseous phases from which they can be more readily removed and treated. Contaminant concentrations in these "environmentally mobile" forms usually decline over time so that the economic efficiency and the overall success of remediation technologies are subject to the "law of diminishing returns". In this paper we consider the "state of the art" in our understanding of NAPL dissolution and transport, desorption of soilsorbed contaminants and fluid flow in porous media. The extent to which these processes may constrain the success of bioremediation, pump-and-treat remediation and soil venting in relation to established soil quality limits is addressed. Finally, we suggest directions for future research and comment on legislative considerations.
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Affiliation(s)
- A J Beck
- Division of Environmental Sciences, Institute of Environmental and Biological Sciences, Lancaster University, LA1 4YQ, Lancaster, UK
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Abstract
Selective posterior rhizotomy is being increasingly used in the treatment of spasticity associated with cerebral palsy. Anecdotal reports in the literature note that this procedure results in improved upper extremity function and trunk control. We present a systematic analysis of the results of selective posterior rhizotomy performed on patients with cerebral palsy at Santa Rosa Children's Hospital. Patients were video-taped before surgery and one year postoperatively. These videos were reviewed blind by an occupational therapist who graded patients' performance on three tasks: assumption of side sitting, maintenance of side sitting, and block building. Statistically significant improvements were noted in all three categories with p values of .0003, .0001, and .0044 respectively. These results support the anecdotal reports of improvement in upper extremity function and trunk control with selective posterior rhizotomy.
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Affiliation(s)
- A J Beck
- Children's Center, Methodist Hospital, San Antonio, Texas
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Lie KJ, Basch PF, Heyneman D, Beck AJ, Audy JR. Implications for trematode control of interspecific larval antagonism within snail hosts. Trans R Soc Trop Med Hyg 1968; 62:299-319. [PMID: 5659225 DOI: 10.1016/0035-9203(68)90081-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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Vercammen-Grandjean PH, Watkins SG, Beck AJ. Revision of Whartonia glenni Brennan, 1962, an American bat parasite (Acarina: Leeuwenhoekiidae). Acarologia 1965; 7:492-509. [PMID: 5890820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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