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Paul SK, Xi Y, Sanderson P, Naidu R. Controlled release herbicide formulation for effective weed control efficacy. Sci Rep 2024; 14:4216. [PMID: 38378734 PMCID: PMC10879510 DOI: 10.1038/s41598-024-53820-8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/05/2024] [Indexed: 02/22/2024] Open
Abstract
Controlled release formulation (CRF) of herbicide is an effective weed management technique with less eco-toxicity than other available commercial formulations. To maximise the effectiveness of CRFs however, it is crucial to understand the herbicide-releasing behaviour at play, which predominately depends on the interaction mechanisms between active ingredients and carrier materials during adsorption. In this study, we investigated and modelled the adsorption characteristics of model herbicide 2,4-D onto two organo-montmorillonites (octadecylamine- and aminopropyltriethoxysilane-modified) to synthesise polymer-based CRFs. Herbicide-releasing behaviour of the synthesised CRF microbeads was then analysed under various experimental conditions, and weed control efficacy determined under glasshouse conditions. Results revealed that adsorption of 2,4-D onto both organo-montmorillonites follows the pseudo-second-order kinetics model and is predominately controlled by the chemisorption process. However, multi-step mechanisms were detected in the adsorption on both organoclays, hence intra-particle diffusion is not the sole rate-limiting step for the adsorption process. Both organoclays followed the Elovich model, suggesting they have energetically heterogeneous surfaces. Herbicide-releasing behaviours of synthesised beads were investigated at various pH temperatures and ionic strengths under laboratory and glasshouse conditions. Furthermore, weed control efficacy of synthesised beads were investigated using pot studies under glasshouse condition. Desorption studies revealed that both synthesised microbeads have slow releasing behaviour at a wide range of pHs (5-9), temperatures (25-45 °C), and ionic strengths. The results also revealed that synthesised microbeads have excellent weed control efficacy on different broad-leaf weed species under glasshouse conditions.
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Affiliation(s)
- Santosh Kumar Paul
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
- CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
- Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur, 1701, Bangladesh
| | - Yunfei Xi
- Central Analytical Research Facility (CARF) & School of Chemistry and Physics - Faculty of Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
- CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia.
- CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia.
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Islam MR, Sanderson P, Payne TE, Naidu R. Synthesised and modified zeolite for effective management of beryllium contaminants in aqueous media under different conditions. Sci Total Environ 2023; 904:166384. [PMID: 37597559 DOI: 10.1016/j.scitotenv.2023.166384] [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] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 08/21/2023]
Abstract
The effective management of beryllium (Be) in solution is not well established. In this study, zeolite was synthesised from coal fly ash (CFA) and further modified to enhance Be sorption. Results indicated zeolite NaP1 was effectively synthesised, and cross-linked chitosan was grafted in/on the zeolite structure during modification. The Brunauer, Emmett, and Teller (BET) surface area substantially increased from 1.05 m2/g in CFA to 94.0 m2/g in the synthesised zeolite (SZ). Furthermore, the modified zeolite (MZ) showed improved functionality as a reactive site for Be sorption. A comparative sorption study revealed inferior sorption (11.3 %) and higher desorption (56.1 %) of Be using CFA than the sorption using SZ (93.0 % sorption, 2.9 % desorption) and MZ (93.0 % sorption, 1.5 % desorption). Consequently, SZ and MZ exhibited higher sorption efficacy than commercial zeolite (57.4 %) and other commercial sorbents. At an experimental pH of 5.5 [relevant to the pH of Little Forest Legacy Waste Site (LFLS) soil, a representative site for potential Be contamination], MZ showed higher sorption than SZ. The higher sorption in MZ resulted from its elevated ligand complexation [with nitrogen (N), phosphorous (P), and oxygen (O)] and some ion exchange (with Na+, -NH3+, and H+ ions) mechanisms. Moreover, increased sorption (up to 99 %) was observed using colloidal soil solution (CSS) collected from LFLS soil to simulate field conditions after extensive rainfall. Different environmental factors (e.g. pH, temperature, time, CSS, concentrations of sorbate, and sorbent) regulated Be sorption. The sorption mechanism was best described by the Langmuir model, and the pseudo-second-order kinetic model (R2 = 0.999). Moreover, the sorption reaction was spontaneous (ΔG = -Ve), enthalpically, and entropically influenced. Desorption hysteresis (ndesorption/nsorption < 1) suggested irreversible sorption, and the chemisorption mechanism of Be was confirmed by Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia; crc for Contamination Assessment and Remediation of the Environment (crcCARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia.
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia; crc for Contamination Assessment and Remediation of the Environment (crcCARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia; crc for Contamination Assessment and Remediation of the Environment (crcCARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia.
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Grieco C, Hardacre C, Ryan N, Sanderson P. An older woman with abdominal pain and ascites. BMJ 2023; 382:e075225. [PMID: 37678933 DOI: 10.1136/bmj-2023-075225] [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: 09/09/2023]
Affiliation(s)
| | | | - Neil Ryan
- University of Bristol Medical School, Bristol, UK
- Royal Infirmary of Edinburgh, Edinburgh, UK
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Paul SK, Xi Y, Sanderson P, Deb AK, Islam MR, Naidu R. Investigation of herbicide sorption-desorption using pristine and organoclays to explore the potential carriers for controlled release formulation. Chemosphere 2023:139335. [PMID: 37394186 DOI: 10.1016/j.chemosphere.2023.139335] [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] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 07/04/2023]
Abstract
Injudicious application of available commercial herbicide formulations leads to water, air and soil contamination, which adversely affect the environment, ecosystems and living organisms. Controlled release formulation (CRFs) could be an effective way to reduce the problems associated with commercially available herbicides. Organo-montmorillonites are prominent carrier materials for synthesising CRFs of commercial herbicides. Quaternary amine and organosilane functionalised organo-montmorillonite and pristine montmorillonite were used to investigate their potential as suitable carriers for CRFs in herbicide delivery systems. The experiment involved a batch adsorption process with successive dilution method. Results revealed that pristine montmorillonite is not a suitable carrier for CRFs of 2,4-D due to its low adsorption capacity and hydrophilic nature. Conversely, octadecylamine (ODA) and ODA-aminopropyltriethoxysilane (APTES) functionalised montmorillonite has better adsorption capacities. Adsorption of 2,4-D onto both organoclays is higher at pH.3 (232.58% for MMT1 and 161.29% for MMT2) compared to higher pH until pH.7 (49.75% for MMT1 and 68.49% for MMT2). Integrated structural characterisation studies confirmed the presence of 2,4-D on the layered organoclays. The Freundlich adsorption isotherm model fitted best to the experimental data, which revealed an energetically heterogeneous surface of the experimental organoclays, and adsorption which specifically involved chemisorption. The cumulative desorption percentages of adsorbed 2,4-D from MMT1(2,4-D loaded) and MMT2(2,4-D loaded) after seven desorption cycles were 65.53% and 51.45%, respectively. This outcome indicates: firstly, both organoclays are potential carrier materials for CRFs of 2,4-D; secondly, they have the ability to reduce the instantaneous release of 2,4-D immediately after application; and thirdly, eco-toxicity is greatly diminished.
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Affiliation(s)
- Santosh Kumar Paul
- Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur 1701, Bangladesh
| | - Yunfei Xi
- Central Analytical Research Facility (CARF) & School of Chemistry and Physics - Faculty of Science, Queensland University of Technology, Brisbane, QLD 4001, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Amal Kanti Deb
- Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; Institute of Leather Engineering and Technology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia.
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Islam MR, Sanderson P, Johansen MP, Payne TE, Naidu R. Environmental chemistry response of beryllium to diverse soil-solution conditions at a waste disposal site. Environ Sci Process Impacts 2023; 25:94-109. [PMID: 36537748 DOI: 10.1039/d2em00313a] [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: 06/17/2023]
Abstract
This study evaluated how the variation in different sorption conditions of beryllium (Be) in soil-water systems (electrolytes; ionic strengths; competing, counter, and co-existing ions; concentrations of Be and soil; and temperature) affected Be's environmental behaviour. For this reason, potentially contaminated soil was collected from a legacy waste site near Sydney, Australia. The sorption-desorption plateau for Be was found at >12.5 g L-1 (soil/solution), considering higher sorption and limited desorption. Variable surface charges developed by different added ions (competing ions, counter ions, and co-existence of all ions) were not always correlated with Be sorption. However, effects of added ions in Be sorption (increased by counter ions and decreased by competing ions) primarily occurred at low pH, with no noticeable changes at pH > 6 due to the hydration and precipitation behaviour of Be at higher pH. Both laboratory data and modelling indicated the substantial effect of counter ions on increased sorption of Be. Relatively higher amounts of sorption under the co-existence of all added ions were suggested from synergistic actions. Sorption was favourable (KL > 0, and 0 < RL < 1) across all concentrations and temperatures at pH 5.5, and high retention (84-97%) occurred after four desorption cycles indicated specific sorption. The sorption process was exothermic (ΔH > -43 kJ mole-1), while desorption was endothermic (ΔH > +78.4 kJ mole-1). All sorption-desorption reactions were spontaneous (ΔG = -Ve), and executed without any structural deformation (ΔS = nearly zero) of soil particles. However, the effect of temperature on desorption was influenced by the concentrations of Be. Higher retention and different sorption-desorption parameters (Kd-desorption > Kd-sorption; Kf-desorption > Kf-sorption; ndesorption/nsorption < 1) indicate limited mobility of Be and the presence of desorption hysteresis in the studied soil under the experimental conditions.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia.
- CRC for Contamination Assessment and Remediation of the Environment (CARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia.
- CRC for Contamination Assessment and Remediation of the Environment (CARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia
| | - Mathew P Johansen
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia.
- CRC for Contamination Assessment and Remediation of the Environment (CARE), The University of Newcastle, University Drive, Callaghan Campus, NSW 2308, Australia
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Islam MR, Sanderson P, Payne TE, Deb AK, Naidu R. Role of beryllium in the environment: Insights from specific sorption and precipitation studies under different conditions. Sci Total Environ 2022; 838:155698. [PMID: 35523347 DOI: 10.1016/j.scitotenv.2022.155698] [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: 03/14/2022] [Revised: 04/24/2022] [Accepted: 04/30/2022] [Indexed: 06/14/2023]
Abstract
In this study, we examined factors influencing the environmental behaviour of Be, specifically considering soils collected from a legacy radioactive waste disposal site near Sydney (Australia). The precipitation study showed the formation of Be(OH)2 (amorphous) from ICP standard solution, but a mixture of Be(OH)2 (alpha), Be(OH)2 (beta) and ternary Na/S-Be (ΙΙ)-OH(s) solid phase were formed from BeSO4 solutions. The precipitation of Be started at relatively lower pH at higher concentrations than at the lower Be concentration as indicated by both laboratory data and simulation. Across the pH range, the Be sorption curve was divided into three phases, these being pH 3-6, pH 6-10, and pH > 10, within which sorption of Be with soil was 9-97%, 90-97%, and 66-90%, respectively. Beryllium solubility was limited at pH > 7, but a sorption study with soil showed chemisorption under both acidic and alkaline pH (pH 5.5 and 8) conditions, which was confirmed by FTIR and XPS analysis. At pH 5.5 (specifically relevant to the study site), sorption of Be was 72-95%, in which 77% and 46% Be was respectively sorbed by separated fulvic and humic acid fractions. The irreversible chemisorption mechanism was controlled by SOM at higher pH, and by metal oxyhydroxides at lower pH. Both organic and inorganic components synergistically influence the specific chemisorption of Be at the intermediate pH 5.5 of field soil.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia.
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
| | - Amal Kanti Deb
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; Institute of Leather Engineering and Technology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia.
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Nguyen MK, Lin C, Hoang HG, Sanderson P, Dang BT, Bui XT, Nguyen NSH, Vo DVN, Tran HT. Evaluate the role of biochar during the organic waste composting process: A critical review. Chemosphere 2022; 299:134488. [PMID: 35385764 DOI: 10.1016/j.chemosphere.2022.134488] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [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: 01/16/2022] [Revised: 03/18/2022] [Accepted: 03/30/2022] [Indexed: 05/21/2023]
Abstract
Composting is very robust and efficient for the biodegradation of organic waste; however secondary pollutants, namely greenhouse gases (GHGs) and odorous emissions, are environmental concerns during this process. Biochar addition to compost has attracted the interest of scientists with a lot of publication in recent years because it has addressed this matter and enhanced the quality of compost mixture. This review aims to evaluate the role of biochar during organic waste composting and identify the gaps of knowledge in this field. Moreover, the research direction to fill knowledge gaps was proposed and highlighted. Results demonstrated the commonly referenced conditions during composting mixed biochar should be reached such as pH (6.5-7.5), moisture (50-60%), initial C/N ratio (20-25:1), biochar doses (1-20% w/w), improved oxygen content availability, enhanced the performance and humification, accelerating organic matter decomposition through faster microbial growth. Biochar significantly decreased GHGs and odorous emissions by adding a 5-10% dosage range due to its larger surface area and porosity. On the other hand, with high exchange capacity and interaction with organic matters, biochar enhanced the composting performance humification (e.g., formation humic and fulvic acid). Biochar could extend the thermophilic phase of composting, reduce the pH value, NH3 emission, and prevent nitrogen losses through positive effects to nitrifying bacteria. The surfaces of the biochar particles are partly attributed to the presence of functional groups such as Si-O-Si, OH, COOH, CO, C-O, N for high cation exchange capacity and adsorption. Adding biochars could decrease NH3 emissions in the highest range up to 98%, the removal efficiency of CH4 emissions has been reported with a wide range greater than 80%. Biochar could absorb volatile organic compounds (VOCs) more than 50% in the experiment based on distribution mechanisms and surface adsorption and efficient reduction in metal bioaccessibilities for Pb, Ni, Cu, Zn, As, Cr and Cd. By applicating biochar improved the compost maturity by promoting enzymatic activity and germination index (>80%). However, physico-chemical properties of biochar such as particle size, pore size, pore volume should be clarified and its influence on the composting process evaluated in further studies.
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Affiliation(s)
- Minh Ky Nguyen
- Ph.D. Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Chitsan Lin
- Ph.D. Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan.
| | - Hong Giang Hoang
- Faculty of Health Sciences and Finance - Accounting, Dong Nai Technology University, Bien Hoa, Dong Nai, 76100, Viet Nam
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - Bao Trong Dang
- HUTECH University, 475A, Dien Bien Phu, Ward 25, Binh Thanh District, Ho Chi Minh City, Viet Nam
| | - Xuan Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, 700000, Viet Nam
| | - Ngoc Son Hai Nguyen
- Faculty of Environment, Thai Nguyen University of Agriculture and Forestry (TUAF), Thai Nguyen, 23000, Viet Nam
| | - Dai-Viet N Vo
- Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Viet Nam; School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Penang, Malaysia
| | - Huu Tuan Tran
- Laboratory of Ecology and Environmental Management, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
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Hai NNS, Sanderson P, Qi F, Du J, Nong NN, Bolan N, Naidu R. Effects of chelates (EDTA, EDDS, NTA) on phytoavailability of heavy metals (As, Cd, Cu, Pb, Zn) using ryegrass (Lolium multiflorum Lam.). Environ Sci Pollut Res Int 2022; 29:42102-42116. [PMID: 35366209 DOI: 10.1007/s11356-022-19877-6] [Citation(s) in RCA: 1] [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: 05/15/2021] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
This paper summarises a study of the application of the synthetic chelate ethylenediaminetetraacetic acid (EDTA), and the natural chelates ethylenediamine-N,N'-disuccinic acid (EDDS) and nitrilotriacetate (NTA) to enhance ryegrass (Lolium multiflorum Lam.) uptake of the heavy metal(oid)s (HMs) (As, Cd, Cu, Pb and Zn) from contaminated soils in mining sites. The study compares the effects of these chelates (EDTA, EDDS and NTA) on the phytoavailability of HMs (As, Cd, Cu, Pb, Zn) using ryegrass (Lolium multiflorum Lam.) through the single addition and sequential addition methods. The results show that application of EDTA, EDDS and NTA significantly increases ryegrass (Lolium multiflorum Lam.)'s shoot uptake of some HMs when compared with no EDTA, EDDS or NTA application, particularly through sequential chelate treatment (EDTA 0.5:1+0.5:1; NTA 0.5:1+0.5:1; EDDS 0.5:1+0.5:1). EDTA 0.5:1+0.5:1 was more effective at increasing the concentration of Pb in shoots than were the other chelates (EDDS and NTA) and controls. Moreover, the concentrations of Zn in the shoots of ryegrass (Lolium multiflorum Lam.) in Hich Village significantly increased with the application of split dose (0.5:1+0.5:1). The plants displayed symptoms of toxicity including yellow and necrotic leaves at the end of the experiment. The selected chelates (EDTA, EDDS and NTA) led to a significant decrease in plant biomass (yield) 28 days after transfer with a maximum decrease in EDTA treatment (0.5:1+0.5:1) soils. This decrease was 3.43-fold in Ha Thuong, 3-fold in Hich Village and 1.59-fold in Trai Cau, respectively, relative to the control. HM concentration and dissolved organic carbon (DOC) in pore water provided an explanation for why fresh weight was significantly reduced with application of chelates in sequential dose (EDTA 0.5:1+0.5:1 and NTA 0.5:1+0.5:1).
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Affiliation(s)
- Nguyen Ngoc Son Hai
- Faculty of Environment, Thai Nguyen University of Agriculture and Forestry (TUAF), Thai Nguyen, Vietnam.
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia.
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia
| | - Fangjie Qi
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia
| | - Jianhua Du
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia
| | - Nguyen Ngoc Nong
- Faculty of Environment, Thai Nguyen University of Agriculture and Forestry (TUAF), Thai Nguyen, Vietnam
| | - Nanthi Bolan
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia
- School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRCCARE), Newcastle, Australia
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Rahman MA, Lamb D, Rahman MM, Bahar MM, Sanderson P. Adsorption-Desorption Behavior of Arsenate Using Single and Binary Iron-Modified Biochars: Thermodynamics and Redox Transformation. ACS Omega 2022; 7:101-117. [PMID: 35036682 PMCID: PMC8756808 DOI: 10.1021/acsomega.1c04129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Arsenic (As) is a dangerous contaminant in drinking water which displays cogent health risks to humans. Effective clean-up approaches must be developed. However, the knowledge of adsorption-desorption behavior of As on modified biochars is limited. In this study, the adsorption-desorption behavior of arsenate (AsV) by single iron (Fe) and binary zirconium-iron (Zr-Fe)-modified biosolid biochars (BSBC) was investigated. For this purpose, BSBC was modified using Fe-chips (FeBSBC), Fe-salt (FeCl3BSBC), and Zr-Fe-salt (Zr-FeCl3BSBC) to determine the adsorption-desorption behavior of AsV using a range of techniques. X-ray photoelectron spectroscopy results revealed the partial reduction of pentavalent AsV to the more toxic trivalent AsIII form by FeCl3BSBC and Zr-FeCl3BSBC, which was not observed with FeBSBC. The Langmuir maximum AsV adsorption capacities were achieved as 27.4, 29.77, and 67.28 mg/g when treated with FeBSBC (at pH 5), FeCl3BSBC (at pH 5), and Zr-FeCl3BSBC (at pH 6), respectively, using 2 g/L biochar density and 22 ± 0.5 °C. Co-existing anions reduced the AsV removal efficiency in the order PO4 3- > CO3 2- > SO4 2- > Cl- > NO3 -, although no significant inhibitory effects were observed with cations like Na+, K+, Mg2+, Ca2+, and Al3+. The positive correlation of AsV adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (-14.95 to -12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr-Fe-salt-coated biochars can be utilized for the effective removal of AsV up to six-repeated cycles.
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Affiliation(s)
- Md. Aminur Rahman
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
- Department
of Public Health Engineering (DPHE), Zonal
Laboratory, Khulna 9100, Bangladesh
| | - Dane Lamb
- Chemical
and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Mohammad Mahmudur Rahman
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Md Mezbaul Bahar
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Peter Sanderson
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
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10
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Islam MR, Sanderson P, Naidu R, Payne TE, Johansen MP, Bari ASMF, Rahman MM. Beryllium in contaminated soils: Implication of beryllium bioaccessibility by different exposure pathways. J Hazard Mater 2022; 421:126757. [PMID: 34352522 DOI: 10.1016/j.jhazmat.2021.126757] [Citation(s) in RCA: 1] [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: 04/13/2021] [Revised: 07/12/2021] [Accepted: 07/25/2021] [Indexed: 05/14/2023]
Abstract
Inhalation exposure and beryllium (Be) toxicity are well-known, but research on bioaccessibility from soils via different exposure pathways is limited. This study examined soils from a legacy radioactive waste disposal site using in vitro ingestion (Solubility Bioaccessibility Research Consortium [SBRC], physiologically based extraction test [PBET], in vitro gastrointestinal [IVG]), inhalation (simulated epithelial lung fluid [SELF]) and dynamic two-stage bioaccessibility (TBAc) methods, as well as 0.43 M HNO3 extraction. The results showed, 70 ± 4.8%, 56 ± 16.8% and 58 ± 5.7% of total Be were extracted (gastric phase [GP] + intestinal phase [IP]) in the SBRC, PBET, and IVG methods, respectively. Similar bioaccessibility of Be (~18%) in PBET-IP and SELF was due to chelating agents in the extractant. Moreover, TBAc-IP showed higher extraction (20.8 ± 2.0%) in comparison with the single-phase (SBRC-IP) result (4.8 ± 0.23%), suggesting increased Be bioaccessibility and toxicity in the gastrointestinal tract when the contamination derives from the inhalation route. The results suggested Be bioaccessibility depends on solution pH; time of extraction; soil reactive fractions (organic-inorganic); particle size, and the presence of chelating agents in the fluid. This study has significance for understanding Be bioaccessibility via different exposure routes and the application of risk-based management of Be-contaminated sites.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia.
| | - Ravi Naidu
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
| | - Mathew P Johansen
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
| | - A S M Fazle Bari
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, The University of Newcastle, Callaghan Campus, NSW 2308, Australia
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11
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Islam MR, Sanderson P, Payne TE, Johansen MP, Naidu R. Desorption and Migration Behavior of Beryllium from Contaminated Soils: Insights for Risk-Based Management. ACS Omega 2021; 6:30686-30697. [PMID: 34805696 PMCID: PMC8600622 DOI: 10.1021/acsomega.1c04572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 10/22/2021] [Indexed: 05/25/2023]
Abstract
Factors influencing the desorption, distribution, and vertical migration behavior of Be in contaminated soils are not fully understood. This study examined the desorption and migration of Be in a soil profile from a legacy radioactive waste disposal site using different batch leaching [monofilled waste extraction procedure (MWEP); synthetic precipitation leaching procedure (SPLP); simulated acid rain solution (SARS); and toxicity characteristic leaching procedure] and sequential leaching [community bureau of reference (BCR)] methods for insights relevant to the application of risk-based management. The results showed that Be desorption was higher in the presence of organic than the inorganic leachate composition (MWEP < SPLP < SARS < TCLP < BCR first-step). The desorption followed three diffusion control mechanisms, which resulted in three desorption rate constant estimates of 157, 87.1, and 40.4 Be/kg.h0.5, and the estimated desorption maximum was 556 μg/kg. The desorption process was, spontaneous (ΔG > 0), enthalpically and entropically influenced. Increasing the incubation period and heat treatment resulted in a decrease of Be desorption and migration. The soil clay content and pH were the primary factors influencing Be desorption, and the results suggested that Be was desorbed from metal oxyhydroxides and surfaces of silicates (e.g., reactive surfaces of clay minerals), organic matters, and soil pores. Because of high K d values, the mobility of Be was limited, and no exceedances of ecological or human health risk index or guidelines were determined for the current contamination levels at the site. However, Be released from the waste trenches has the ongoing potential to increase Be concentration in the soil.
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Affiliation(s)
- Md. Rashidul Islam
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
| | - Peter Sanderson
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
| | - Timothy E. Payne
- Australian
Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, New South Wales 2234, Australia
| | - Mathew P. Johansen
- Australian
Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, New South Wales 2234, Australia
| | - Ravi Naidu
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
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12
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Fazle Bari ASM, Lamb D, Choppala G, Seshadri B, Islam MR, Sanderson P, Rahman MM. Arsenic bioaccessibility and fractionation in abandoned mine soils from selected sites in New South Wales, Australia and human health risk assessment. Ecotoxicol Environ Saf 2021; 223:112611. [PMID: 34385057 DOI: 10.1016/j.ecoenv.2021.112611] [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: 03/04/2021] [Revised: 07/31/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
Understanding the transport behaviour of arsenic (As) from soils to humans is critical when undertaking human health risk assessment and contamination control. This research examined As bioaccessibility in different As fractions and particle size fractions of As-enriched mine soils using different extractions. Bioaccessibility of As ranged from 0.24% to 32% for Solubility Bioaccessibility Research Consortium (SBRC) and Physiologically Based Extraction Test (PBET) methods, with extractable As (using 0.43 M HNO3) being 1.3-24.9%. The highest As bioaccessibility (19-32%) was consistently observed in the fine particle size fraction (< 53 µm) of all three extractions. Sequential extractions revealed that As fractions were mostly associated with crystalline (30-73%) and amorphous (9-59%) Fe/Al oxyhydroxides. The bioaccessibility of As in the gastric phase of SBRC and PBET methods highlighted a positive correlation (R2 = 0.83-0.88, p < 0.01) with exchangeable, surface and amorphous- bound As fractions, while the intestinal phase showed a strong positive correlation (R2 = 0.85-0.89, p < 0.01) with exchangeable and surface bound fractions. The study revealed that As bioaccessibility in soils can potentially be determined using the 0.43 M HNO3 extraction procedure. Health risk assessment confirmed that there was a strong increase in chronic daily intake, hazard quotient and cancer risk, with a reduction in particle size.
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Affiliation(s)
- A S M Fazle Bari
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Dane Lamb
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria, 3000, Australia
| | - Girish Choppala
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Balaji Seshadri
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
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13
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Rahman MA, Lamb D, Rahman MM, Bahar MM, Sanderson P, Abbasi S, Bari ASMF, Naidu R. Removal of arsenate from contaminated waters by novel zirconium and zirconium-iron modified biochar. J Hazard Mater 2021; 409:124488. [PMID: 33246815 DOI: 10.1016/j.jhazmat.2020.124488] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/02/2020] [Accepted: 11/03/2020] [Indexed: 06/12/2023]
Abstract
A novel biochar metal oxide composite was synthesized for effective removal of arsenate (As(V)) from aqueous solution. The materials synthesized for As(V) removal was based on a biosolid-derived biochar (BSBC) impregnated with zirconium (Zr) and zirconium-iron (Zr-Fe). The synthesized materials were comprehensively characterized with a range of techniques including Brunauer-Emmett-Teller (BET-N2) surface area, zeta potential, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results confirmed that loading of Zr and Zr-Fe onto the biochar surface was successful. The influence of pH, biochar density, ionic strength, As(V) dose rate, major anions and cations on As(V) removal was also investigated. Under all pH and reaction conditions the Zr-Fe composite biochar removed the greatest As(V) from solution of the materials tested. The maximum sorption capacity reached 15.2 mg/g for pristine BSBC (pH 4.0), while modified Zr-BSBC and Zr-FeBSBC composites achieved 33.1 and 62.5 mg/g (pH 6), respectively. The thermodynamic parameters (Gibbs free energy, enthalpy, and entropy) suggested that the adsorption process is spontaneous and endothermic. The ZrBSBC and Zr-FeBSBC showed excellent reusability and stability over four cycles. Unmodified biochar resulted in partial reduction of As(V) under oxic conditions, whilst modified biochars did not influence the oxidation state of As. All results demonstrated that the Zr and Zr-Fe BSBC composites could perform as promising adsorbents for efficient arsenate removal from natural waters.
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Affiliation(s)
- Md Aminur Rahman
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Department of Public Health Engineering (DPHE), Zonal Laboratory, Khulna 9100, Bangladesh
| | - Dane Lamb
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia.
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia
| | - Md Mezbaul Bahar
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia
| | - Sepide Abbasi
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - A S M Fazle Bari
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia
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14
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Rahman MA, Rahman MM, Bahar MM, Sanderson P, Lamb D. Antimonate sequestration from aqueous solution using zirconium, iron and zirconium-iron modified biochars. Sci Rep 2021; 11:8113. [PMID: 33854093 PMCID: PMC8046795 DOI: 10.1038/s41598-021-86978-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/30/2020] [Accepted: 02/23/2021] [Indexed: 11/18/2022] Open
Abstract
Antimony (Sb) is increasingly being recognized as an important contaminant due to its various industrial applications and mining operations. Environmental remediation approaches for Sb are still lacking, as is the understanding of Sb environmental chemistry. In this study, biosolid biochar (BSBC) was produced and utilized to remove antimonate (Sb(V)) from aqueous solution. Zirconium (Zr), Zirconium-iron (Zr-Fe) and Fe-O coated BSBC were synthesized for enhancing Sb(V) sorption capacities of BSBC. The combined results of specific surface area, FTIR, SEM-EDS, TEM-EDS, and XPS confirmed that Zr and/or Zr-Fe were successfully coated onto BSBC. The effects of reaction time, pH, initial Sb(V) concentration, adsorbate doses, ionic strength, temperature, and the influence of major competitive co-existing anions and cations on the adsorption of Sb(V) were investigated. The maximum sorption capacity of Zr-O, Zr-Fe, Zr-FeCl3, Fe-O, and FeCl3 coated BSBC were 66.67, 98.04, 85.47, 39.68, and 31.54 mg/g respectively under acidic conditions. The XPS results revealed redox transformation of Sb(V) species to Sb(III) occurred under oxic conditions, demonstrating the biochar's ability to behave as an electron shuttle during sorption. The sorption study suggests that Zr-O and Zr-O-Fe coated BSBC could perform as favourable adsorbents for mitigating Sb(V) contaminated waters.
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Affiliation(s)
- Md Aminur Rahman
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, Callaghan, Australia
- Department of Public Health Engineering (DPHE), Zonal Laboratory, Khulna, 9100, Bangladesh
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, Callaghan, Australia
| | - Md Mezbaul Bahar
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, Callaghan, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), The University of Newcastle, Callaghan, Australia
| | - Dane Lamb
- Global Innovation Centre for Advanced Nanomaterials, The University of Newcastle, Advanced Technology Centre - Room 181, University Drive, Callaghan, NSW, 2308, Australia.
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15
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Islam MR, Sanderson P, Johansen MP, Payne TE, Naidu R. The influence of soil properties on sorption-desorption of beryllium at a low level radioactive legacy waste site. Chemosphere 2021; 268:129338. [PMID: 33383279 DOI: 10.1016/j.chemosphere.2020.129338] [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: 10/14/2020] [Revised: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 05/14/2023]
Abstract
This study examined the influence of soil physicochemical properties on the sorption, desorption and kinetics of beryllium (Be) uptake and release on soils from a legacy waste site in Australia. This information is needed to help explain the current distribution of Be at the site and evaluate potential future environmental risks. Sorption was determined by a batch study and key soil properties were assessed to explain Be retention. The soil was favourable for sorption of Be (up to 99%) due to organic content, negative surface charge, soil oxyhydroxides (Fe/Al/Mn-O/OH) and the porosity of the soil structure. Lesser sorption was observed in the presence of a background electrolyte (NaNO3). Sorption closely followed pseudo second order kinetics and was best described by the Langmuir model. FTIR analysis suggested that chemisorption was the predominant mechanism of Be sorption. Desorption was very low and best described by the Freundlich model. The low desorption reflected the high Kd (up to 6624 L/kg), and the presence of hysteresis suggested partially irreversible binding of Be with active surfaces of the soil matrix (minerals, SOM, oxyhydroxides of Fe/Al/Mn etc.). Intra-particle diffusion of Be and entrapment in the pores contribute to the irreversible binding. The sorption behaviour of Be helped to explain the relative immobility of Be at the site despite the significant quantities of Be disposed. Soil physicochemical properties were significant for Be sorption, through influencing both the uptake and desorption, and this demonstrates the implications of these measurements for evaluating potential future risks to the environment.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), The University of Newcastle (UoN), Callaghan Campus, NSW, 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), The University of Newcastle (UoN), Callaghan Campus, NSW, 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia.
| | - Mathew P Johansen
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, 2234, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, 2234, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), The University of Newcastle (UoN), Callaghan Campus, NSW, 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia.
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16
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Owens GL, Sivalingam V, Abdelrahman M, Beirne JP, Blake D, Collins A, Davies R, Dilley J, Farquharson M, Frimpong D, Gomes N, Hawco S, Ilenkovan N, Jones E, Jones SEF, Khan T, Leung E, Otify M, Parnell L, Rimmer MP, Ryan N, Sanderson P, Stocker L, Wilkinson M, Wong S, Bharathan R, Wan YLL. Are trainees working in obstetrics and gynecology confident and competent in the care of frail gynecological oncology patients? Int J Gynecol Cancer 2020; 30:1959-1965. [PMID: 33046571 DOI: 10.1136/ijgc-2020-001834] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 01/22/2023] Open
Abstract
INTRODUCTION Older patients undergoing cancer surgery are at increased risk of post-operative complications, prolonged hospital stay, and mortality. Identification of frailty can help predict patients at high risk of peri-operative complications and allow a collaborative, multidisciplinary team approach to their care. A survey was conducted to assess the confidence and knowledge of trainees in obstetrics and gynecology regarding identification and management of peri-operative issues encountered in frail gynecological oncology patients. METHODS A web-based survey was distributed via the Audit and Research in Gynaecological Oncology (ARGO) collaborative and UK Audit and Research Collaborative in Obstetrics and Gynaecology (UKARCOG) . The survey on the management of frail peri-operative patients was disseminated to doctors-in-training (trainees) working in obstetrics and gynecology in the United Kingdom (UK) and Ireland. Specialty (ST1-7), subspecialty, and general practice trainees, non-training grade doctors, and foundation year doctors currently working in obstetrics and gynecology were eligible. Consultants were excluded. Study data were collected using REDCAP software hosted at the University of Manchester. Responses were collected over a 6-week period between January and February 2020. RESULTS Of the 666 trainees who participated, 67% (425/666) reported inadequate training in peri-operative management of frail patients. Validated frailty assessment tools were used by only 9% (59/638) of trainees and less than 1% (4/613) were able to correctly identify all the diagnostic features of frailty. Common misconceptions included the use of chronological age and gender in frailty assessments. The majority of trainees (76.5%, 448/586) correctly answered a series of questions relating to mental capacity; however, only 6% (36/606) were able to correctly identify all three diagnostic features of delirium. A total of 87% (495/571) of trainees supported closer collaboration with geriatricians and a multidisciplinary approach. CONCLUSIONS Obstetrics and gynecology trainees reported inadequate training in the peri-operative care of frail gynecological oncology patients, and overwhelmingly favored input from geriatricians. Routine use of validated frailty assessment tools may aid diagnosis of frailty in the peri-operative setting. There is an unmet need for formal education in the management of frail surgical patients within the UK and Irish obstetrics and gynecology curriculum.
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Affiliation(s)
- Gemma Louise Owens
- Division of Cancer Sciences, School of Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK .,Obstetrics and Gynaecology, Sharoe Green Unit, Royal Preston Hospital, Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK
| | - Vanitha Sivalingam
- Division of Cancer Sciences, School of Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | | | - James P Beirne
- Patrick J Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK.,Northern Ireland Gynaecological Cancer Centre, Belfast Health and Social Care Trust, Belfast, UK
| | - Dominic Blake
- Northern Gynaecological Oncology Centre, Queen Elizabeth Hospital, Gateshead Health NHS Foundation Trust, Gateshead, UK
| | - Anna Collins
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Rhianna Davies
- Obstetrics and Gynaecology, Addenbrooke's Hospital, Cambridge, UK
| | - James Dilley
- Gynaecological Oncology, Barts and The London NHS Trust, London, UK
| | | | - Diana Frimpong
- East Gynaecological Oncology Centre, Queen Elizabeth the Queen Mother Hospital, Margate, UK
| | - Nana Gomes
- Gynaecological Oncology, St George's Hospital, London, UK
| | - Sarah Hawco
- Obstetrics and Gynaecology, Ninewells Hospital, Dundee, UK
| | - Narthana Ilenkovan
- Obstetrics and Gynaecology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Eleanor Jones
- Division of Cancer Sciences, School of Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | | | - Tabassum Khan
- Gynaecological Oncology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Elaine Leung
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, UK
| | - Mohamed Otify
- Gynaecological Oncology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Laura Parnell
- Obstetrics and Gynaecology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - Michael P Rimmer
- MRC Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Neil Ryan
- Academic Centre for Women's Health, University of Bristol, Bristol, UK
| | - Peter Sanderson
- Gynaecological Oncology, Simpson Centre for Reproductive Health, Edinburgh, UK.,Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Linden Stocker
- Academic Unit of Human Development and Health, University of Southampton, Southampton, UK
| | - Michael Wilkinson
- Gynaecological Oncology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Siewchee Wong
- Obstetrics and Gynaecology, Lincoln County Hospital, Lincoln, UK
| | - Rasiah Bharathan
- Gynaecological Oncology, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Yee-Loi Louise Wan
- Division of Cancer Sciences, School of Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
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Yan K, Dong Z, Naidu R, Liu Y, Li Y, Wijayawardena A, Sanderson P, Li H, Ma LQ. Comparison of in vitro models in a mice model and investigation of the changes in Pb speciation during Pb bioavailability assessments. J Hazard Mater 2020; 388:121744. [PMID: 31796360 DOI: 10.1016/j.jhazmat.2019.121744] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 09/17/2019] [Revised: 10/31/2019] [Accepted: 11/21/2019] [Indexed: 06/10/2023]
Abstract
In this study, the predominant Pb minerals prior to and after Pb relative bioavailability (Pb-RBA) and Pb bioaccessibility (Pb-BAc) tests were identified using SEM (scanning electron microscopy), XANES (X-ray absorption near edge structure) and XRD (X-ray diffraction). The correlations between in vitro Pb-BAc (using the UBM (Unified BARGE Method) and RBALP (Relative BioAccessibility Leaching Procedure) models) and in vivo Pb-RBA (using endpoints of kidney and liver in an mice model) were determined. The results demonstrated that both RBALP and UBM (gastric phase) reliably indicate Pb-RBA (Pb-RBA). However, raising the solid:liquid ratio of the gastric phase of UBM is necessary to determine Pb-BAc if the soils contain total Pb >10,000 mg/kg. The comparison of Pb minerals prior to and after in vitro extractions demonstrated that the relatively soluble forms of Pb (PbSO4, PbO2 and MgO Pb) start to dissolve than other forms of Pb minerals, suggesting there was no difference in Pb2+ release between chemical-based (RBALP) and physiologically-based (UBM) models. The identification of the Pb minerals of Pb5(PO4)3Cl and organically-complexed Pb in mice excreta demonstrated that a portion of Pb2+ combined with food and humic acid to generate organically-complexed Pb in mice excreta, and that Pb5(PO4)3Cl is not bioavailable.
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Affiliation(s)
- Kaihong Yan
- ATC Building, Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia
| | - Zhaomin Dong
- School of Space and Environment, Beihang University, Beijing, China
| | - Ravi Naidu
- ATC Building, Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Yanju Liu
- ATC Building, Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia
| | - Yeling Li
- School of Resource and Environmental Engineering, East China University of Technology, Nanchang, China
| | - Ayanka Wijayawardena
- ATC Building, Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia
| | - Peter Sanderson
- ATC Building, Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia
| | - Hongbo Li
- School of the Environment, Nanjing University, Nanjing, China.
| | - Lena Q Ma
- School of the Environment, Nanjing University, Nanjing, China; Soil and Water Science Department, University of Florida, Gainesville, FL 32611, United States
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18
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Wilson C, Skaczkowski G, Sanderson P, Shand M, Byrne A. Triaging for Supportive Care Services: Do People Want and Accept Referral? J Glob Oncol 2018. [DOI: 10.1200/jgo.18.10300] [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: 11/20/2022] Open
Abstract
Background: Distress is the 6th vital sign in cancer yet it is only assessed in an ad hoc way in most cancer services. The Distress Thermometer (DT) and the associated Problem Checklist (PC) are the most widely available tools although few studies report on how they are used to effectively triage services. Aim: To explore the link between distress assessment, problem identification, referral to specific supportive care services by staff, and service uptake by cancer patients and survivors among a sample of people attending a major cancer hospital in Victoria Australia. Methods: A secondary analysis of quality assurance audit data were undertaken using data collected from patient medical records between January 2013 and June 2014. Data extracted were; age, sex, post code, language spoken, disease and treatment information, distress as measured by the DT and problems as identified by the PC. For the current study the focus was on the number of referrals offered and the number accepted or declined. The type of services referred to was also examined. Results: Data were collected for 877 patients although missing data resulted in a final sample size of 853. Only data associated with the first DT of each patient are presented. 729 patients (86%) participated in distress screening. The distress threshold of 4 was reported by 50% of participants, highlighting the prevalence of distress requiring support. This 50% reported an average of 9 problems on the PC, many of which came from the physical domain, with 91% reporting at least 1 physical problem. Other problems reported were emotional (74% of the sample); practical (24%), family (14%) and spiritual (2%). Referral data, which was available for 614 people, indicated that over 60% (372) were offered at least one referral. Referral offer was significantly predicted by DT score, and number of problems reported. Acceptance was significantly related to total number of problems, treatment type, and type of referral; referral for physical treatment was most likely to be accepted (87%) whereas referral for emotional support was least likely (53%). Conclusion: Routine distress screening and problem identification are critical to triaging to supportive care services. In a tertiary care setting, not all people will be screened or will want to be screened; not all people will be referred to services; and not all people will accept referral. Nonetheless, problems are extensive with most survivors reporting experiencing several problems. Despite a focus on the physical, these problems extend to other domains, including the emotional, and it is important that services are available to support these needs.
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Affiliation(s)
- C. Wilson
- Olivia Newton John Centre and La Trobe University, Heidelberg, Australia
| | - G. Skaczkowski
- Olivia Newton John Centre and La Trobe University, Heidelberg, Australia
| | - P. Sanderson
- Olivia Newton John Centre and La Trobe University, Heidelberg, Australia
| | - M. Shand
- Olivia Newton John Centre and La Trobe University, Heidelberg, Australia
| | - A. Byrne
- Olivia Newton John Centre and La Trobe University, Heidelberg, Australia
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19
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Eales MG, Ferrari E, Goddard AD, Lancaster L, Sanderson P, Miller C. Mechanistic and phenotypic studies of bicarinalin, BP100 and colistin action on Acinetobacter baumannii. Res Microbiol 2018; 169:296-302. [DOI: 10.1016/j.resmic.2018.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 04/20/2018] [Accepted: 04/20/2018] [Indexed: 01/10/2023]
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20
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Thangavadivel K, Ranganathan S, Sanderson P, Chadalavada S, Naidu R, Bowman M. Case study of testing heavy-particle concentrator-aided remediation of lead-contaminated rifle shooting range soil. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/rem.21561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Peter Sanderson
- Global Centre for Environmental Remediation; University of Newcastle
| | | | - Ravi Naidu
- Managing Director and CEO; CRC CARE and Director; GCER University of Newcastle
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21
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Saleem JJ, Russ AL, Sanderson P, Johnson TR, Zhang J, Sittig DF. Current Challenges and Opportunities for Better Integration of Human Factors Research with Development of Clinical Information Systems. Yearb Med Inform 2018. [PMID: 19855872 DOI: 10.1055/s-0038-1638638] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Summary
Objectives Clinical information system (CIS) developers and implementers have begun to look to other scientific disciplines for new methods, tools, and techniques to help them better understand clinicians and their organizational structures, clinical work environments, capabilities of clinical information and communications technology, and the way these structures and processes interact. The goal of this article is to help CIS researchers, developers, implementers, and evaluators better understand the methods, tools, techniques, and literature of the field of human factors.
Methods We developed a framework that explains how six key human factors topics relate to the design, implementation, and evaluation of CISs.
Results Using this framework we discuss the following six topics: 1) informatics and patient safety; 2) user interface design and evaluation; 3) workflow and task analysis; 4) clinical decision making and decision support; 5) distributed cognition; and 6) mental workload and situation awareness.
Conclusions Integrating the methods, tools, and lessons learned from each of these six areas of human factors research early in CIS design and incorporating them iteratively during development can improve user performance, user satisfaction, and integration into clinical workflow. Ultimately, this approach will improve clinical information systems and healthcare delivery.
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22
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Seshadri B, Bolan NS, Choppala G, Kunhikrishnan A, Sanderson P, Wang H, Currie LD, Tsang DCW, Ok YS, Kim G. Potential value of phosphate compounds in enhancing immobilization and reducing bioavailability of mixed heavy metal contaminants in shooting range soil. Chemosphere 2017; 184:197-206. [PMID: 28595145 DOI: 10.1016/j.chemosphere.2017.05.172] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [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: 03/03/2017] [Revised: 04/26/2017] [Accepted: 05/30/2017] [Indexed: 05/16/2023]
Abstract
Shooting range soils contain mixed heavy metal contaminants including lead (Pb), cadmium (Cd), and zinc (Zn). Phosphate (P) compounds have been used to immobilize these metals, particularly Pb, thereby reducing their bioavailability. However, research on immobilization of Pb's co-contaminants showed the relative importance of soluble and insoluble P compounds, which is critical in evaluating the overall success of in situ stabilization practice in the sustainable remediation of mixed heavy metal contaminated soils. Soluble synthetic P fertilizer (diammonium phosphate; DAP) and reactive (Sechura; SPR) and unreactive (Christmas Island; CPR) natural phosphate rocks (PR) were tested for Cd, Pb and Zn immobilization and later their mobility and bioavailability in a shooting range soil. The addition of P compounds resulted in the immobilization of Cd, Pb and Zn by 1.56-76.2%, 3.21-83.56%, and 2.31-74.6%, respectively. The reactive SPR significantly reduced Cd, Pb and Zn leaching while soluble DAP increased their leachate concentrations. The SPR reduced the bioaccumulation of Cd, Pb and Zn in earthworms by 7.13-23.4% and 14.3-54.6% in comparison with earthworms in the DAP and control treatment, respectively. Bioaccessible Cd, Pb and Zn concentrations as determined using a simplified bioaccessibility extraction test showed higher long-term stability of P-immobilized Pb and Zn than Cd. The differential effect of P-induced immobilization between P compounds and metals is due to the variation in the solubility characteristics of P compounds and nature of metal phosphate compounds formed. Therefore, Pb and Zn immobilization by P compounds is an effective long-term remediation strategy for mixed heavy metal contaminated soils.
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Affiliation(s)
- B Seshadri
- Global Institute for Environmental Research, ATC Building, Faculty of Science and Information Technology, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), P.O. Box 486, Salisbury, SA 5106, Australia
| | - N S Bolan
- Global Institute for Environmental Research, ATC Building, Faculty of Science and Information Technology, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), P.O. Box 486, Salisbury, SA 5106, Australia.
| | - G Choppala
- Southern Cross GeoScience, Southern Cross University, Lismore, New South Wales, Australia
| | - A Kunhikrishnan
- Department of Agro-Food Safety, National Institute of Agricultural Science, Wanju, Jeollabuk-do 55365, Republic of Korea
| | - P Sanderson
- Global Institute for Environmental Research, ATC Building, Faculty of Science and Information Technology, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), P.O. Box 486, Salisbury, SA 5106, Australia
| | - H Wang
- School of Environment and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, People's Republic of China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, School of Environmental and Resource Sciences, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, People's Republic of China
| | - L D Currie
- Fertilizer and Lime Research Centre, Massey University, Palmerston North, New Zealand
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Y S Ok
- O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea.
| | - G Kim
- Department of Civil and Environmental Engineering, Hannam University, Republic of Korea
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Abstract
This study used Situation Awareness (SA) as a measure to evaluate two new functional displays supplementing existing monitor displays in a large hydropower system control room. Because it was impractical to use traditional SA measures this paper proposes a novel SA measurement framework, in which controllers' SA levels are derived from their in-the-loop utterance and viewing patterns, their context-specific reports of the situations, and their overall SA reflections. Results indicate that the SA measures not only support and complement one another, but also are consistent with performance results. This study offers a novel approach of using convergent lines of evidence to assess SA in the situations that involve a whole control room or command centre or in situations constrained by time and resources.
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Affiliation(s)
- X. Li
- School of ITEE, The University of Queensland, St Lucia, Australia
| | - P Sanderson
- School of ITEE, The University of Queensland, St Lucia, Australia
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24
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Sanderson P, Naidu R, Bolan N. The effect of environmental conditions and soil physicochemistry on phosphate stabilisation of Pb in shooting range soils. J Environ Manage 2016; 170:123-30. [PMID: 26812009 DOI: 10.1016/j.jenvman.2016.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 07/30/2015] [Revised: 01/14/2016] [Accepted: 01/15/2016] [Indexed: 05/27/2023]
Abstract
The stabilisation of Pb in the soil by phosphate is influenced by environmental conditions and physicochemical properties of the soils to which it is applied. Stabilisation of Pb by phosphate was examined in four soils under different environmental conditions. The effect of soil moisture and temperature on stabilisation of Pb by phosphate was examined by measurement of water extractable and bioaccessible Pb, sequential fractionation and X-ray absorption spectroscopy. The addition of humic acid, ammonium nitrate and chloride was also examined for inhibition or improvement of Pb stability with phosphate treatment. The effect of moisture level varied between soils. In soil MB and DA a soil moisture level of 50% water holding capacity was sufficient to maximise stabilisation of Pb, but in soil TV and PE reduction in bioaccessible Pb was inhibited at this moisture level. Providing moisture at twice the soil water holding capacity did not enhance the effect of phosphate on Pb stabilisation. The difference of Pb stability as a result of incubating phosphate treated soils at 18 °C and 37 °C was relatively small. However wet-dry cycles decreased the effectiveness of phosphate treatment. The reduction in bioaccessible Pb obtained was between 20 and 40% with the most optimal treatment conditions. The reduction in water extractable Pb by phosphate was substantial regardless of incubation conditions and the effect of different temperature and soil moisture regimes was not significant. Selective sequential extraction showed phosphate treatment converted Pb in fraction 1 (exchangeable, acid and water soluble) to fraction 2 (reducible). There were small difference in fraction 4 (residual) Pb and fraction 1 as a result of treatment conditions. X-ray absorption spectroscopy of stabilised PE soil revealed small differences in Pb speciation under varying soil moisture and temperature treatments. The addition of humic acid and chloride produced the greatest effect on Pb speciation in phosphate treated soils.
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Affiliation(s)
- Peter Sanderson
- Global Centre for Environmental Remediation, University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia; Previous Address: Centre for Environmental Risk Assessment and Remediation, University of South Australia, University Parade, Mawson Lakes, SA 5095, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation, University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia; Previous Address: Centre for Environmental Risk Assessment and Remediation, University of South Australia, University Parade, Mawson Lakes, SA 5095, Australia
| | - Nanthi Bolan
- Global Centre for Environmental Remediation, University of Newcastle and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), Australia; Previous Address: Centre for Environmental Risk Assessment and Remediation, University of South Australia, University Parade, Mawson Lakes, SA 5095, Australia
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25
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Marshall SD, Sanderson P, McIntosh CA, Kolawole H. The effect of two cognitive aid designs on team functioning during intra-operative anaphylaxis emergencies: a multi-centre simulation study. Anaesthesia 2016; 71:389-404. [PMID: 26792648 PMCID: PMC5066652 DOI: 10.1111/anae.13332] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2015] [Indexed: 12/12/2022]
Abstract
This multi‐centre repeated measures study was undertaken to determine how contrasting designs of cognitive aids affect team performance during simulated intra‐operative anaphylaxis crises. A total of 24 teams consisting of a consultant anaesthetist, an anaesthetic trainee and anaesthetic assistant managed three simulated intra‐operative anaphylaxis emergencies. Each team was assigned at random to a counterbalanced order of: no cognitive aid; a linear cognitive aid; and a branched cognitive aid, and scored for team functioning. Scores were significantly higher with a linear compared with either a branched version of the cognitive aid or no cognitive aid for ‘Team Overall Behavioural Performance’, difference between study groups (F‐value) 5.8, p = 0.01. Aggregate scores were higher with the linear compared with the branched aid design (p = 0.03). Cognitive aids improve co‐ordination of the team's activities and support team members to verbalise their actions. A linear design of cognitive aid improves team functioning more than a branched design.
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Affiliation(s)
- S D Marshall
- Department of Anaesthesia and Peri-operative Medicine, Monash University, Melbourne, Victoria, Australia
| | - P Sanderson
- Schools of Psychology, ITEE, and Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - C A McIntosh
- Department of Anaesthesia, John Hunter Hospital, Newcastle, New South Wales, Australia
| | - H Kolawole
- Peninsula Health, Frankston, Victoria, Australia
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26
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Sanderson P, Naidu R, Bolan N, Lim JE, Ok YS. Chemical stabilisation of lead in shooting range soils with phosphate and magnesium oxide: Synchrotron investigation. J Hazard Mater 2015; 299:395-403. [PMID: 26150282 DOI: 10.1016/j.jhazmat.2015.06.056] [Citation(s) in RCA: 6] [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: 11/21/2014] [Revised: 05/07/2015] [Accepted: 06/22/2015] [Indexed: 06/04/2023]
Abstract
Three Australian shooting range soils were treated with phosphate and magnesium oxide, or a combination of both to chemically stabilize Pb. Lead speciation was determined after 1 month ageing by X-ray absorption spectroscopy combined with linear combination fitting in control and treated soils. The predominant Pb species in untreated soils were iron oxide bound Pb, humic acid bound Pb and the mineral litharge. Treatment with phosphate resulted in substantial pyromorphite formation in two of the soils (TV and PE), accounting for up to 38% of Pb species present, despite the addition of excess phosphate. In MgO treated soils only, up to 43% of Pb was associated with MgO. Litharge and Pb hydroxide also formed as a result of MgO addition in the soils. Application of MgO after P treatment increased hydroxypyromorphite/pyromorphite formation relative to soils teated with phosphate only. X-ray diffraction and Scanning electron microscopy revealed PbO precipitate on the surface of MgO. Soil pH, (5.3-9.3) was an important parameter, as was the solubility of existing Pb species. The use of direct means of determination of the stabilisation of metals such as by X-ray absorption spectroscopy is desirable, particularly in relation to understanding long term stability of the immobilised contaminants.
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Affiliation(s)
- Peter Sanderson
- Centre for Environmental Risk Assessment and Remediation and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), University of South Australia, University Parade, 5095 Mawson Lakes, Australia
| | - Ravi Naidu
- Centre for Environmental Risk Assessment and Remediation and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), University of South Australia, University Parade, 5095 Mawson Lakes, Australia.
| | - Nanthi Bolan
- Centre for Environmental Risk Assessment and Remediation and CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), University of South Australia, University Parade, 5095 Mawson Lakes, Australia
| | - Jung Eun Lim
- Korea Biochar Research Center & Department of Biological Environment, Kangwon National University, Chuncheon 200-701, South Korea
| | - Yong Sik Ok
- Korea Biochar Research Center & Department of Biological Environment, Kangwon National University, Chuncheon 200-701, South Korea
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27
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Abstract
Yolk sac germ cell tumours are rare in post-menopausal patients. Most involve mixed yolk sac tumours Consider diagnosis in patients with a pelvic–abdominal mass and raised AFP
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Affiliation(s)
- V L Parker
- Department of Obstetrics and Gynaecology, Barnsley Hospital, UK
| | - P Sanderson
- Department of Obstetrics and Gynaecology, Barnsley Hospital, UK
| | - V Naik
- Department of Pathology, Barnsley Hospital, UK
| | - C Quincey
- Department of Pathology, Barnsley Hospital, UK
| | - K Farag
- Department of Obstetrics and Gynaecology, Barnsley Hospital, UK
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28
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Sanderson P, Naidu R, Bolan N. Effectiveness of chemical amendments for stabilisation of lead and antimony in risk-based land management of soils of shooting ranges. Environ Sci Pollut Res Int 2015; 22:8942-8956. [PMID: 23807560 DOI: 10.1007/s11356-013-1918-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 06/07/2013] [Indexed: 06/02/2023]
Abstract
This study aims to examine the effectiveness of amendments for risk-based land management of shooting range soils and to explore the effectiveness of amendments applied to sites with differing soil physiochemical parameters. A series of amendments with differing mechanisms for stabilisation were applied to four shooting range soils and aged for 1 year. Chemical stabilisation was monitored by pore water extraction, toxicity characteristic leaching procedure (TCLP) and the physiologically based extraction test (PBET) over 1 year. The performance of amendments when applied in conditions reflecting field application did not match the performance in the batch studies. Pore water-extractable metals were not greatly affected by amendment addition. TCLP-extractable Pb was reduced significantly by amendments, particularly lime and magnesium oxide. Antimony leaching was reduced by red mud but mobilised by some of the other amendments. Bioaccessible Pb measured by PBET shows that bioaccessible Pb increased with time after an initial decrease due to the presence of metallic fragments in the soil. Amendments were able to reduce bioaccessible Pb by up to 50 %. Bioaccessible Sb was not readily reduced by soil amendments. Soil amendments were not equally effective across the four soils.
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Affiliation(s)
- Peter Sanderson
- CERAR, University of South Australia, Mawson Lakes, South Australia, 5095, Australia
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29
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Parker VL, Sanderson P, Raw D, Farag K. Do we understand the pathophysiology of endometrial cancer? EUR J GYNAECOL ONCOL 2015; 36:595-598. [PMID: 26513890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Endometrial carcinoma is the fourth most common cancer in U.K. women. Previous literature describes local, haematological or lymphatic dissemination to common sites including vaginal vault, lungs, liver, bones and brain. The authors present two unusual cases of endometrial cancer metastases to the psoas major muscle and laparoscopic port sites. Case 1 involves a 71-year-old female who underwent total abdominal hysterectomy, bilateral salpingo-oophorectomy and peritoneal washings (TAH, BSO, PW) for Grade 1 endometrial cancer, Stage lB. Three years later she represented with lower back and right hip pain, with MRI imaging revealing psoas muscle metastases. Case 2 describes a 60-year-old female who underwent laparoscopic-assisted vaginal hysterectomy (LAVH), BSO+ PW for Grade 1 endometrial cancer, Stage 1B. Three years postoperatively she presented with a lateral abdominal mass overlying the laparoscopic port site scar, which was Grade 1 endometrial cancer on biopsy. These rare metastatic locations question our traditional understanding of the pathophysiology of endometrial carcinoma.
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Sanderson P, Innamaa A, Palmer J, Tidy J. Imiquimod therapy for extramammary Paget's disease of the vulva: a viable non-surgical alternative. J OBSTET GYNAECOL 2014; 33:479-83. [PMID: 23815201 DOI: 10.3109/01443615.2013.790348] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Extramammary Paget's disease (EMPD) is a rare intraepidermal adenocarcinoma that can affect the vulval skin. Surgical excision is the gold-standard treatment, however, recurrence rates are high and extensive excisions can produce long-lasting cosmetic and functional defects. We describe one of the largest case series to-date (n = 6) on the use of topical 5% imiquimod cream as a novel treatment option and discuss our experiences. With the addition of our six cases to the literature, there are now 29 documented cases of vulval EMPD treated with 5% imiquimod cream. Of these, 50% of primary disease cases and 73% of recurrent primary disease cases have achieved clinical resolution with 5% imiquimod therapy alone. These findings suggest that imiquimod provides a viable alternative to surgical excision for vulval EMPD. However, we acknowledge that this is a simple retrospective analysis and that treatment scheduling and follow-up needs investigation in a trial setting.
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Affiliation(s)
- P Sanderson
- Sheffield Gynaecological Cancer Centre, Royal Hallamshire Hospital, Sheffield , UK.
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Sanderson P, Naidu R, Bolan N. Ecotoxicity of chemically stabilised metal(loid)s in shooting range soils. Ecotoxicol Environ Saf 2014; 100:201-8. [PMID: 24287010 DOI: 10.1016/j.ecoenv.2013.11.003] [Citation(s) in RCA: 28] [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] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 11/01/2013] [Accepted: 11/05/2013] [Indexed: 06/02/2023]
Abstract
Five chemical amendments (soft rock phosphate, lime, commercial phosphate amendment, red mud and magnesium oxide) were applied across four different shooting range soils to chemically stabilise metal(loid)s in the soils. Soils were contaminated with Pb between 2330 and 12,167 mg/kg, Sb from 7.4 to 325 mg/kg and soil pH ranged from 5.43 to 9.29. Amendments were tested for their ability to reduce the bioavailability of Pb, Sb, Zn, Ni, Cu and As in the soils to soil organisms after one year of aging, by measuring a series of ecotoxicological endpoints for earthworms and plants and soil microbial activity. Growth-based endpoints for earthworms and plants were not significantly affected by amendment addition, except in the most contaminated soil. Per cent survival and weight-loss reduction of earthworms was enhanced by amendment addition in only the most contaminated soil. Plant biomass and root elongation was not significantly affected by amendment addition (p=<0.05). Red mud and magnesium oxide appeared toxic to plants and earthworms, probably due to highly alkaline pH (9-12). Lead in soil organisms was relatively low despite the high concentrations of Pb in the soils, suggesting low bioavailability of Pb. Uptake of Pb by earthworms was reduced by between 40 and 96 per cent by amendments, but not across all soils. Amendments reduced Sb in earthworms in Townsville soil by up to 92 per cent. For lettuce the average uptake of Pb was reduced by 40 to 70 per cent with amendment addition in Townsville, Darwin and Perth soil. The effect of amendments on the uptake of Sb, Zn, Ni, Cu and As was variable between soils and amendments. Microbial activity was increased by greater than 50 per cent with amendments addition, with soft rock phosphate and lime being the most effective in Murray Bridge and TV soils and commercial phosphate and MgO being the most effective in Darwin and Perth soils.
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Affiliation(s)
- Peter Sanderson
- CERAR, University of South Australia, Mawson Lakes, SA 5095, Australia; CRCCARE, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Ravi Naidu
- CERAR, University of South Australia, Mawson Lakes, SA 5095, Australia; CRCCARE, University of South Australia, Mawson Lakes, SA 5095, Australia.
| | - Nanthi Bolan
- CERAR, University of South Australia, Mawson Lakes, SA 5095, Australia; CRCCARE, University of South Australia, Mawson Lakes, SA 5095, Australia
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Sanderson P, Naidu R, Bolan N, Bowman M, McLure S. Effect of soil type on distribution and bioaccessibility of metal contaminants in shooting range soils. Sci Total Environ 2012; 438:452-462. [PMID: 23026152 DOI: 10.1016/j.scitotenv.2012.08.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 08/03/2012] [Accepted: 08/03/2012] [Indexed: 06/01/2023]
Abstract
Shooting ranges from Department of Defence sites around Australia were investigated for extent of metal contamination. Shooting range soils contained concentrations ranging from 399 to 10,403 mg/kg Pb, 6.57 to 252 mg/kg Sb, 28.7 to 1250 mg/kg Cu, 5.63 to 153 mg/kg Zn, 1.35 to 8.8 mg/kg Ni and 3.08 to 15.8 mg/kg As. Metal(loid)s were primarily concentrated in the stop butt and the surface soil (0-10 cm). The distribution of contamination reflected firing activity, soil properties, climate and management practices. Climatic variations among sites in Australia are significant, with a temperate climate in the south and tropical climate with high rainfall in the north. Up to 8% of total Pb resided in soil fines (<0.075 mm), due to the fragmentation of bullets on impact. Distribution and bioaccessibility varied between each site. Acidic Townsville soil had the highest proportion of water extractable Pb at 10%, compared to the alkaline Murray Bridge with only 2% Pb water extractable. Soil properties such as CEC, pH and dissolved organic carbon influence mobility. This is reflected in the subsoil concentrations of Pb in Townsville and Darwin which are up to 30 and 46% of surface concentration in the subsoil respectively. Similarly bioaccessibility is influenced by soil properties and ranges from 46% in Townsville to 70% in Perth. Acidic pH promotes dissolution of secondary minerals and the downward movement of Pb in the profile. The secondary Pb minerals formed as a result of weathering in these soils were cerussite, hydrocerussite, pyromorphite, galena and anglesite. Copper oxide was also reported on fragments from bullet jackets. These results have implications for range management.
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Affiliation(s)
- Peter Sanderson
- CERAR, University of South Australia, Mawson Lakes, SA 5095, Australia
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Sanderson P, Yaqoob P, Calder PC. Effects of Dietary Lipid Manipulation upon Rat Spleen Lymphocyte Functions and the Expression of Lymphocyte Surface Molecules. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/13590849509000211] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sanderson P, Byrd LM. To push? or not to push?: Second stage management in a patient with Stickler syndrome at risk of retinal detachment. J OBSTET GYNAECOL 2009; 29:61-2. [PMID: 19280503 DOI: 10.1080/01443610802484427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- P Sanderson
- Department of Urology, Royal Hallamshire Hospital, Sheffield, UK
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Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating folate and colo-rectal cancer risk. The workshop aimed to examine current research and establish research priorities. The timing of folate exposure with respect to carcinogenesis, as well as the dose and form of folate, were considered key issues for future research. Also, the need to study further the influence of genetically defined subgroups was highlighted for future research.
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Affiliation(s)
- Peter Sanderson
- Nutrition Division, Food Standards Agency, London WC2 6NH, UK
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Sanderson P, Sattar N, Olthof M, Grimble RF, Calder PC, Griffin BA, de Roos NM, Belch JJF, Muller DPR, Vita JA. Dietary lipids and vascular function: UK Food Standards Agency workshop report. Br J Nutr 2007; 91:491-500. [PMID: 15005836 DOI: 10.1079/bjn20031034] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [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: 11/11/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating the effect of dietary lipids on vascular function. The workshop highlighted the need for intervention studies to be sufficiently powered for these measures and that they should be corroborated with other, more validated, risk factors for CVD. Work presented at the workshop suggested a beneficial effect of long-chain n-3 PUFA and a detrimental effect of trans fatty acids. The workshop also considered the importance of the choice of study population in dietary intervention studies and that ‘at risk’ subgroups within the general population may be more appropriate than subjects that are unrepresentatively healthy.
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Sanderson P, Gill JMR, Packard CJ, Sanders TAB, Vessby B, Williams CM. UK Food Standards Agencycis-monounsaturated fatty acid workshop report. Br J Nutr 2007. [DOI: 10.1079/bjn2002595] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating the optimal dietary intake forn-9cis-monounsaturated fatty acids (MUFA). The aim was to review the mechanisms underlying the reported beneficial effects of MUFA on CHD risk, and to establish priorities for future research. The issue of optimal MUFA intake is contingent upon optimal total fat intake; however, there is no consensus of opinion on what the optimal total fat intake should be. Thus, it was recommended that a large multi-centre study should look at the effects on CHD risk of MUFA replacement of saturated fatty acids in relation to varying total fat intakes; this study should be of sufficient size to take account of genetic variation, sex, physical activity and stage of life factors, as well as being of sufficient duration to account for adaptation to diets. Recommendations for studies investigating the mechanistic effects of MUFA were also made. Methods of manipulating the food chain to increase MUFA at the expense of saturated fatty acids were also discussed.
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Elsom R, Sanderson P, Hesketh JE, Jackson MJ, Fairweather-Tait SJ, Akesson B, Handy J, Arthur JR. Functional markers of selenium status: UK Food Standards Agency workshop report. Br J Nutr 2007; 96:980-4. [PMID: 17092391 DOI: 10.1017/bjn20061893] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 12/20/2022]
Abstract
The workshop was organised to discuss the validity and limitations of existing functional markers of Se status in human subjects and to identify future research priorities in this area. Studies presented as part of this workshop investigated: the bioavailability of Se from different dietary sources; potential functional markers of Se status; individual variation in response to Se; the effect of marginal Se status on immune function. The workshop highlighted the need to define the relationship between functional markers of Se status and health outcomes.
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Affiliation(s)
- Rachel Elsom
- Food Standards Agency, 125 Kingsway, London WC2B 6NH, UK.
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Singh M, Sanderson P, Hurrell RF, Fairweather-Tait SJ, Geissler C, Prentice A, Beard JL. Iron bioavailability: UK Food Standards Agency workshop report. Br J Nutr 2007; 96:985-90. [PMID: 17092392 DOI: 10.1017/bjn20061894] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating factors affecting iron status and the bioavailability of dietary iron. Results presented at the workshop show menstrual blood loss to be the major determinant of body iron stores in premenopausal women. In the presence of abundant and varied food supplies, the health consequences of lower iron bioavailability are unclear and require further investigation.
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Affiliation(s)
- Mamta Singh
- Food Standards Agency, Aviation House, 125 Kingsway, London WC2B 6NH, UK.
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Singh M, Ashwell M, Sanderson P, Cade J, Moreton J, Fairweather-Tait S, Roe M, Marx JJM, Worwood M, Cook JD. Risk of iron overload in carriers of genetic mutations associated with hereditary haemochromatosis: UK Food Standards Agency workshop. Br J Nutr 2006; 96:770-3. [PMID: 17010238] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating diet and carriers of genetic mutations associated with hereditary haemochromatosis. The workshop concluded that individuals who are heterozygous for the C282Y mutation of the HFE gene do not appear to respond abnormally to dietary Fe and therefore do not need to change their diet to prevent accumulation of body Fe.
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Affiliation(s)
- Mamta Singh
- Food Standards Agency, Aviation House, London WC2B 6NH, UK.
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Sanderson P. MRSA is bigger than us. J Hosp Infect 2006; 62:389-90. [PMID: 16337031 DOI: 10.1016/j.jhin.2005.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2005] [Accepted: 08/24/2005] [Indexed: 11/24/2022]
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Sanderson P, Johnson IT, Mathers JC, Powers HJ, Downes CS, McGlynn AP, Dare R, Kampman E, Pool-Zobel BL, Bingham SA, Rafter JJ. Emerging diet-related surrogate end points for colorectal cancer: UK Food Standards Agency diet and colonic health workshop report. Br J Nutr 2004; 91:315-23. [PMID: 14756919 DOI: 10.1079/bjn20031035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 12/13/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating emerging diet-related surrogate end points for colorectal cancer (CRC). The workshop aimed to overview current research and establish priorities for future research. The workshop considered that the validation of current putative diet-related surrogate end points for CRC and the development of novel ones, particularly in the emerging fields of proteomics, genomics and epigenomics, should be a high priority for future research.
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Sanderson P. Folate bioavailability - Food Standards Agency workshop report. NUTR BULL 2003. [DOI: 10.1046/j.1467-3010.2003.00349.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sanderson P, McNulty H, Mastroiacovo P, McDowell IFW, Melse-Boonstra A, Finglas PM, Gregory JF. Folate bioavailability: UK Food Standards Agency workshop report. Br J Nutr 2003; 90:473-9. [PMID: 12908910 DOI: 10.1079/bjn2003889] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [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: 11/11/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating folate bioavailability. The workshop aimed to overview current research and establish priorities for future research. Discrepancies were observed in the evidence base for folate bioavailability, especially with regard to the relative bioavailability of natural folates compared with folic acid. A substantial body of evidence shows folic acid to have superior bioavailability relative to food folates; however, the exact relative bioavailability still needs to be determined, and in particular with regard to mixed diets. The bioavailability of folate in a mixed diet is probably not a weighted average of that in the various foods consumed; thus the workshop considered that assessment of folate bioavailability of whole diets should be a high priority for future research.
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Affiliation(s)
- Peter Sanderson
- Nutrition Division, Food Standards Agency, Aviation House, 125 Kingsway, London WC2 6NH, UK.
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Sanderson P, Finnegan YE, Williams CM, Calder PC, Burdge GC, Wootton SA, Griffin BA, Joe Millward D, Pegge NC, Bemelmans WJE. UK Food Standards Agency alpha-linolenic acid workshop report. Br J Nutr 2002; 88:573-9. [PMID: 12425738 DOI: 10.1079/bjn2002691] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [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: 11/11/2022]
Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating whether n-3 polyunsaturated fatty acids (PUFA) from plant oils (alpha-linolenic acid; ALA) were as beneficial to cardiovascular health as the n-3 PUFA from the marine oils, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The workshop also aimed to establish priorities for future research. Dietary intake of ALA has been associated with a beneficial effect on CHD; however, the results from studies investigating the effects of ALA supplementation on CHD risk factors have proved equivocal. The studies presented as part of the present workshop suggested little, if any, benefit of ALA, relative to linoleic acid, on risk factors for cardiovascular disease; the effects observed with fish-oil supplementation were not replicated by ALA supplementation. There is a need, therefore, to first prove the efficacy of ALA supplementation on cardiovascular disease, before further investigating effects on cardiovascular risk factors. The workshop considered that a beneficial effect of ALA on the secondary prevention of CHD still needed to be established, and there was no reason to look further at existing CHD risk factors in relation to ALA supplementation. The workshop also highlighted the possibility of feeding livestock ALA-rich oils to provide a means of increasing the dietary intake in human consumers of EPA and DHA.
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Affiliation(s)
- Peter Sanderson
- Nutrition Division, Food Standards Agency, Aviation House, 125 Kingsway, London WC2 6NH, UK.
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Abstract
The UK Food Standards Agency convened a group of expert scientists to review current research investigating the optimal dietary intake for n-9 cis-monounsaturated fatty acids (MUFA). The aim was to review the mechanisms underlying the reported beneficial effects of MUFA on CHD risk, and to establish priorities for future research. The issue of optimal MUFA intake is contingent upon optimal total fat intake; however, there is no consensus of opinion on what the optimal total fat intake should be. Thus, it was recommended that a large multi-centre study should look at the effects on CHD risk of MUFA replacement of saturated fatty acids in relation to varying total fat intakes; this study should be of sufficient size to take account of genetic variation, sex, physical activity and stage of life factors, as well as being of sufficient duration to account for adaptation to diets. Recommendations for studies investigating the mechanistic effects of MUFA were also made. Methods of manipulating the food chain to increase MUFA at the expense of saturated fatty acids were also discussed.
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Affiliation(s)
- Peter Sanderson
- Nutrition Division, Food Standards Agency, Aviation House, 125 Kingsway, London, WC2 6NH, UK.
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Twigg S, McCrirrick A, Sanderson P. Post mortem findings reveal major diagnostic errors in one fifth of patients who die in a critical care unit. Br J Anaesth 2000. [DOI: 10.1093/bja/84.5.670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
[(3)H]-Arachidonic acid-labelled rat T lymphocytes released radioactivity extracellularly when stimulated by the calcium ionophore A23187 or by monoclonal antibodies to some cell surface structures (CD2, CD5, CD11a, CD18, CD54, T-cell receptor) but not to others (CD49d, CD62L); release was greater with the calcium ionophore. Almost all of the radioactivity released from anti-CD2-stimulated lymphocytes was recovered in the free fatty acid fraction, whereas only about 50 per cent of that released after A23187 stimulation was recovered in this fraction. A23187 stimulation resulted in release of arachidonic acid from a variety of phospholipids (phosphatidylinositol, phosphatidylcholine and perhaps phosphatidylethanolamine), while the monoclonal antibody stimulation released arachidonic acid from phosphatidylinositol and perhaps phosphatidylcholine. Unstimulated lymphocytes released a range of fatty acids extracellularly, with palmitic acid accounting for 35-40 per cent and arachidonic acid for 5 per cent of released fatty acid. Stimulation of lymphocytes with either anti-CD2 or A23187 increased total fatty acid release 1.5- to 1.8-fold. In both cases palmitic acid remained the most predominant fatty acid released but the contribution of arachidonic acid increased. The type of lipid fed to the rats significantly influenced the amount and type of fatty acid released. Fish oil feeding significantly reduced extracellular fatty acid release by stimulated lymphocytes.
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Affiliation(s)
- P Sanderson
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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