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Gatou MA, Lagopati N, Vagena IA, Gazouli M, Pavlatou EA. ZnO Nanoparticles from Different Precursors and Their Photocatalytic Potential for Biomedical Use. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:nano13010122. [PMID: 36616030 PMCID: PMC9823729 DOI: 10.3390/nano13010122] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 05/26/2023]
Abstract
Semiconductor photocatalysts, particularly ZnO nanoparticles, were synthesized via the precipitation method using four different precursors (zinc acetate/zinc nitrate/zinc sulfate/zinc chloride) and compared, according to their optical, structural, photocatalytic, and anticancer properties. The materials were characterized via X-ray Diffraction method (XRD), micro-Raman, Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), Dynamic Light Scattering (DLS), and Field Emission Scanning Electron Microscope (FESEM) analysis. Photocatalysis was conducted under UV and visible light irradiation, using Rhodamine B as the organic pollutant. It was observed that the highest photocatalysis efficiency was obtained by the nanoparticles synthesized from the zinc acetate used as precursor material. A cell-dependent anticancer efficiency of the tested ZnO nanoparticles was also observed, that was also attributed to the different precursors and the synthesis method, revealing that the nanoparticles that were synthesized from zinc acetate were more bioactive among the four tested precursors. Overall, the data revealed that both the enhanced photocatalytic and biological activity of ZnO nanoparticles derived from zinc acetate precursor could be attributed to the reduced crystalline size, increased surface area, as well as the observed hexagonal crystalline morphology.
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Affiliation(s)
- Maria-Anna Gatou
- Laboratory of General Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou Campus, 15772 Athens, Greece
| | - Nefeli Lagopati
- Laboratory of General Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou Campus, 15772 Athens, Greece
- Laboratory of Biology, Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Ioanna-Aglaia Vagena
- Laboratory of Biology, Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Maria Gazouli
- Laboratory of Biology, Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
- School of Science and Technology, Hellenic Open University, 26335 Patra, Greece
| | - Evangelia A. Pavlatou
- Laboratory of General Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou Campus, 15772 Athens, Greece
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Abstract
Floods change the living environment and threaten public health, while dam construction has often been made to protect and mitigate floods. Meanwhile, an exceptionally high outflow, five times higher than the maximum historical outflow, was discharged on 8 August 2020 from the Hapcheon Dam (HCD), which is located at the middle of the Hwang River, South Korea. As a result, the 2020 flood event occurred in the downstream area, flooding the villages located downstream of the HCD, and damaging agricultural and residential areas. The current study investigates the cause of the flood and how the outflow affected the downstream area. The investigation showed that the Hwang River and the streams connected to the Hwang River experienced piping and overflow in several levees downstream. The frequency analysis of the rainfall upstream and the inflow to the HCD illustrated that the rainfall return periods are only 5–30 years for different durations. The return period of inflow to the HCD was only approximately five years. Sustaining a high-water level before the flooding season for future environmental use caused an exceptionally high outflow. Lowering the water level might have prevented damage to the downstream area. The 2020 flood event provided an imperative lesson to water managers and policymakers, demonstrating that the HCD and downstream safety must be prioritized over water conservation for environmental use.
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Pinto-Vidal FA, Carvalho CDS, Abdalla FC, Utsunomiya HSM, Salla RF, Jones-Costa M. Effects of lithium and selenium in the tail muscle of American bullfrog tadpoles (Lithobates catesbeianus) during premetamorphosis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1975-1984. [PMID: 34363154 DOI: 10.1007/s11356-021-15686-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
The amphibian populations have faced a drastic decline over the past decades. This decline has been associated with the presence of contaminants in the environment, among other environmental stressors. The present study tested the responses following the exposure to lithium (2.5 mg L-1) and selenium (10μg L-1), both isolated and as a mixture, on the metabolic status of the tail muscle of premetamorphic American bullfrog (Lithobates catesbeianus) through the assessment of the total protein content, mobilization of glucose and triglycerides, and the activity of lactate dehydrogenase (LDH). The exposure followed a 21-day assay with two sampling periods (on the 7th and 21st day after the onset of exposure) to evaluate the effects over time. The group exposed to the mixture presented a statistically decreased LDH activity (P < 0.05) in both sampling periods. The presence of selenium elicited a statistically significant increase (P < 0.05) in the glucose mobilization after 7 days of exposure. After 21 days, the animals exposed to selenium presented levels of glucose mobilization comparable to the control group. The mobilization of glucose and triglycerides remained similar to the control group for the animals exposed to lithium and to the mixture in both periods of sampling (P > 0.05). The total protein content did not show any statistical difference in the treated groups throughout the experiment (P > 0.05). The presented results highlight the importance of the assessment of mixtures that can occur in the environment, since the combination of contaminants may elicit distinct toxicity compared with the effects triggered by the chemicals isolated.
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Affiliation(s)
- Felipe Augusto Pinto-Vidal
- Department of Biology, Laboratory of Physiology Conservation (LaFisC), Federal University of São Carlos, Sorocaba, Brazil.
- Postgraduate Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos, Sorocaba, Brazil.
- RECETOX, Faculty of Science, Masaryk University, Kamenice 753/5, Pavilion D29, 625 00, Brno, Czech Republic.
| | - Cleoni Dos Santos Carvalho
- Postgraduate Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos, Sorocaba, Brazil
- Laboratory of Biochemistry and Microbiology (LaBioM), Federal University of São Carlos, Sorocaba, Brazil
| | - Fábio Camargo Abdalla
- Postgraduate Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos, Sorocaba, Brazil
- Laboratory of Structural and Functional Biology (LaBEF), Federal University of São Carlos, Sorocaba, Brazil
| | | | - Raquel Fernanda Salla
- Laboratory of Natural History of Brazilian Amphibians (LaHNAB), State University of Campinas, Campinas, Brazil
| | - Monica Jones-Costa
- Department of Biology, Laboratory of Physiology Conservation (LaFisC), Federal University of São Carlos, Sorocaba, Brazil
- Postgraduate Program of Biotechnology and Environmental Monitoring, Federal University of São Carlos, Sorocaba, Brazil
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Microbial Contamination Survey of Environmental Fresh and Saltwater Resources of Upolu Island, Samoa. ENVIRONMENTS 2021. [DOI: 10.3390/environments8110112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Analysis of microbe diversity in freshwater resources and nearshore seawater samples of Upolu Island was performed to investigate the distribution of harmful bacteria. For this, 124 samples were collected from 23 river systems, two volcanic lakes, and 45 locations inside and outside the barrier reef of Upolu Island, Samoa. Physicochemical parameters for general water quality, detection of coliform bacteria and 16S rRNA amplicon sequencing were performed on all samples. Fecal indicator bacteria (FIB) testing indicated a wide distribution of coliform bacteria in all sampled freshwater sites with evidence of fecal coliform in most locations. Importantly, evidence of coliform bacteria was found in most seawater samples inside and along the reef, apart from those samples taken ~20 km offshore. Illumina 16S rRNA amplicon sequencing of the V4 hypervariable region confirmed the presence of various types of harmful bacterial species, namely from the Enterobacteriaceae, Enterococcae, Streptococcaceae, and Vibrionacea families. By combining the sensitivity of FIB testing and next-generation sequencing, we were able to show the extent of potential contaminations in fresh and seawater samples and simultaneously identify the potential pathogenic bacterial genera present. The wide distribution of potential harmful bacteria from river runoff or direct sewage dumping has an impact on human health, leading to many skin and intestinal diseases, and is potentially detrimental to coral reef community health.
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Jin M, Liu L, Wang DN, Yang D, Liu WL, Yin J, Yang ZW, Wang HR, Qiu ZG, Shen ZQ, Shi DY, Li HB, Guo JH, Li JW. Chlorine disinfection promotes the exchange of antibiotic resistance genes across bacterial genera by natural transformation. THE ISME JOURNAL 2020; 14:1847-1856. [PMID: 32327733 PMCID: PMC7305130 DOI: 10.1038/s41396-020-0656-9] [Citation(s) in RCA: 159] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 03/27/2020] [Accepted: 04/02/2020] [Indexed: 11/09/2022]
Abstract
Chlorine disinfection to drinking water plays an important role in preventing and controlling waterborne disease outbreaks globally. Nevertheless, little is known about why it enriches the antibiotic resistance genes (ARGs) in bacteria after chlorination. Here, ARGs released from killed antibiotic-resistant bacteria (ARB), and culturable chlorine-injured bacteria produced in the chlorination process as the recipient, were investigated to determine their contribution to the horizontal transfer of ARGs during disinfection treatment. We discovered Escherichia coli, Salmonella aberdeen, Pseudomonas aeruginosa and Enterococcus faecalis showed diverse resistance to sodium hypochlorite, and transferable RP4 could be released from killed sensitive donor consistently. Meanwhile, the survival of chlorine-tolerant injured bacteria with enhanced cell membrane permeabilisation and a strong oxidative stress-response demonstrated that a physiologically competent cell could be transferred by RP4 with an improved transformation frequency of up to 550 times compared with the corresponding untreated bacteria. Furthermore, the water quality factors involving chemical oxygen demand (CODMn), ammonium nitrogen and metal ions (Ca2+ and K+) could significantly promote above transformation frequency of released RP4 into injured E. faecalis. Our findings demonstrated that the chlorination process promoted the horizontal transfer of plasmids by natural transformation, which resulted in the exchange of ARGs across bacterial genera and the emergence of new ARB, as well as the transfer of chlorine-injured opportunistic pathogen from non-ARB to ARB. Considering that the transfer elements were quite resistant to degradation through disinfection, this situation poses a potential risk to public health.
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Affiliation(s)
- Min Jin
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China.
| | - Lu Liu
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Da-Ning Wang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Dong Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Wei-Li Liu
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Jing Yin
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Zhong-Wei Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Hua-Ran Wang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Zhi-Gang Qiu
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Zhi-Qiang Shen
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Dan-Yang Shi
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Hai-Bei Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China
| | - Jian-Hua Guo
- Advanced Water Management Centre (AWMC), University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
| | - Jun-Wen Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No 1 Dali Road, Tianjin, 300050, PR China.
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McLeod L, Bharadwaj L, Epp TY, Waldner CL. Bayesian Hierarchical Models as Tools to Evaluate the Association Between Groundwater Quality and the Occurrence of Type 2 Diabetes in Rural Saskatchewan, Canada. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 76:375-393. [PMID: 30617606 DOI: 10.1007/s00244-018-00588-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
There is growing interest in the role of environmental exposures in the development of diabetes. Previous studies in rural Saskatchewan have raised concerns over drinking water contaminants, including arsenic, which has been identified as a possible risk factor for diabetes. Using administrative health and water-quality surveillance data from rural Saskatchewan, an ecological study design was used to investigate associations between concentrations of arsenic, water health standards and aesthetic objectives, and the incidence and prevalence of diabetes. Mixtures of contaminants measured as health standards or as aesthetic objectives were summarized using principal component (PC) analysis. Associations were modeled using Bayesian hierarchical models incorporating both spatial and unstructured random effects, standardized for age and sex, and adjusted for socioeconomic factors and a surrogate measure for smoking rates. Arsenic was not associated with an increased risk of diabetes. For private wells, having groundwater arsenic concentrations in the highest quintile was associated with decreased cumulative diabetes incidence for 2010-2012 (risk ratio [RR] = 0.854, 95% credible interval [CrI] 0.761-0.958) compared with the lowest quintile, a result inconsistent with other studies. For public water supplies, having a first PC score for health standards (primarily summarized selenium, nitrate, and lead) in the third quintile (RR = 1.101, 95% CrI 1.019-1.188), fourth quintile (RR = 1.088, 95% CrI 1.003-1.180), or fifth quintile (RR = 1.115, 95% CrI 1.026-1.213) was associated with an increase in 2010 diabetes prevalence compared with the first quintile. An increase in the PC scores for the third aesthetic objective in private wells (characterized primarily by iron and manganese) was associated with decreased diabetes incidence, although a meaningful dose-response relationship was not evident. No other associations between PC scores for health standards or aesthetic objectives from public or private water supplies and diabetes were identified.
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Affiliation(s)
- Lianne McLeod
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - Lalita Bharadwaj
- School of Public Health, University of Saskatchewan, 104 Clinic Place, Saskatoon, SK, S7N 2Z4, Canada
| | - Tasha Y Epp
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - Cheryl L Waldner
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.
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Lenz KA, Miller TR, Ma H. Anabaenopeptins and cyanopeptolins induce systemic toxicity effects in a model organism the nematode Caenorhabditis elegans. CHEMOSPHERE 2019; 214:60-69. [PMID: 30253257 DOI: 10.1016/j.chemosphere.2018.09.076] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
Cyanobacterial blooms represent a significant risk to environmental and human health due to their production of toxic secondary metabolites, cyanopeptides. Anabaenopeptins and cyanopeptolins are cyanopeptides increasingly detected in surface waters at concentrations exceeding regulatory toxicity levels for other cyanotoxins such as microcystins. Yet their toxicity to aquatic organisms are not well understood. Here we assessed the toxicological effects of three anabaenopeptins (AP-A, AP-B, and AP-F) and three cyanopeptolins (CYP-1007, CYP-1020, and CYP-1041) to a model organism the nematode Caenorhabditis elegans. Examined toxicity endpoints included reproduction, hatching time, growth rate, lifespan, and age-related vulval integrity. Microcystin RR (MC-RR) and microginin 690 were also included in the study for comparisons. At an identical mass concentration (10 μg/L, corresponding to a molar concentration ranging 0.01-0.014 μM depending on the specific peptide), anabaenopeptins (APs) showed the greatest toxicity among all cyanopeptides tested. APs decreased worm reproduction by 23%-34% and shortened worm lifespan by 5 days (a 30% reduction) compared to the controls. APs also induced a remarkable age-related vulval integrity defect (Avid phenotype) in the worm, where over 95% of exposed worms developed the phenotype, compared to a less than 15% in control worms. CYPs showed similar toxicity as MC-RR, and Microginin 690 was the least toxic. These findings suggest that APs and CYPs may pose significant health risks to aquatic organisms. More toxicological studies of these cyanopeptides using different species across different trophic levels are needed to gain a thorough understanding of their potential impact on ecological systems and human health.
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Affiliation(s)
- Kade A Lenz
- Joseph J. Zilber School of Public Health, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, WI, 53201, USA
| | - Todd R Miller
- Joseph J. Zilber School of Public Health, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, WI, 53201, USA
| | - Hongbo Ma
- Joseph J. Zilber School of Public Health, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, WI, 53201, USA.
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Liu X, Lu S, Guo W, Xi B, Wang W. Antibiotics in the aquatic environments: A review of lakes, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 94:736-757. [PMID: 30857084 DOI: 10.1016/j.envint.2016.06.025] [Citation(s) in RCA: 565] [Impact Index Per Article: 94.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 05/19/2016] [Accepted: 06/19/2016] [Indexed: 05/05/2023]
Abstract
The potential threat of antibiotics to the environment and human health has raised significant concerns in recent years. The consumption and production of antibiotics in China are the highest in the world due to its rapid economic development and huge population, possibly resulting in the high detection frequencies and concentrations of antibiotics in aquatic environments of China. As a water resource, lakes in China play an important role in sustainable economic and social development. Understanding the current state of antibiotics in lakes in China is important. Closed and semi-closed lakes provide an ideal medium for the accumulation of antibiotics and antibiotic resistance genes (ARGs). This review summarizes the current levels of antibiotic exposure in relevant environmental compartments in lakes. The ecological and health risks of antibiotics are also evaluated. This review concludes that 39 antibiotics have been detected in the aquatic environments of lakes in China. The levels of antibiotic contamination in lakes in China is relatively high on the global scale. Antibiotic contamination is higher in sediment than water and aquatic organisms. Quinolone antibiotics (QNs) pose the greatest risks. The contents of antibiotics in aquatic organisms are far lower than their maximum residual limits (MRLs), with the exception of the organisms in Honghu Lake. The lakes experience high levels of ARG contamination. A greater assessment of ARG presence and antibiotic exposure are urgent.
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Affiliation(s)
- Xiaohui Liu
- School of Environment, Tsinghua University, Beijing 100084, China; State Environmental Protection Scientific Observation and Research Station for Lake Dongting, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Shaoyong Lu
- State Environmental Protection Scientific Observation and Research Station for Lake Dongting, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Wei Guo
- School of Environmental Science and Engineering, North China Electric Power University, Beijing 1002206, China
| | - Beidou Xi
- State Environmental Protection Scientific Observation and Research Station for Lake Dongting, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Weiliang Wang
- School of Geography and Environment, Shandong Normal University, Jinan, Shandong 250358, China
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Bieber S, Snyder SA, Dagnino S, Rauch-Williams T, Drewes JE. Management strategies for trace organic chemicals in water - A review of international approaches. CHEMOSPHERE 2018; 195:410-426. [PMID: 29274580 DOI: 10.1016/j.chemosphere.2017.12.100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 06/07/2023]
Abstract
To ensure an appropriate management of potential health risks and uncertainties from the release of trace organic chemicals (TOrCs) into the aqueous environment, many countries have evaluated and implemented strategies to manage TOrCs. The aim of this study was to evaluate existing management strategies for TOrCs in different countries to derive and compare underlying core principles and paradigms and to develop suggestions for more holistic management strategies to protect the environment and drinking water supplies from the discharge of undesired TOrCs. The strategies in different industrial countries were summarized and subsequently compared with regards to three particular questions: 1) Do the approaches different countries have implemented manage all or only specific portions of the universe of chemicals; 2) What implementation and compliance strategies are used to manage aquatic and human health risk and what are their pros and cons; and 3) How are site-specific watershed differences being addressed? While management strategies of the different countries target similar TOrCs, the programs differ in several important aspects, including underlying principles, the balance between aquatic or human health protection, implementation methods, and financing mechanisms used to fund regulatory programs.
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Affiliation(s)
- Stefan Bieber
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany
| | - Shane A Snyder
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Sonia Dagnino
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | | | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany.
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McLeod L, Bharadwaj L, Epp T, Waldner CL. Use of Principal Components Analysis and Kriging to Predict Groundwater-Sourced Rural Drinking Water Quality in Saskatchewan. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14091065. [PMID: 28914824 PMCID: PMC5615602 DOI: 10.3390/ijerph14091065] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 11/17/2022]
Abstract
Groundwater drinking water supply surveillance data were accessed to summarize water quality delivered as public and private water supplies in southern Saskatchewan as part of an exposure assessment for epidemiologic analyses of associations between water quality and type 2 diabetes or cardiovascular disease. Arsenic in drinking water has been linked to a variety of chronic diseases and previous studies have identified multiple wells with arsenic above the drinking water standard of 0.01 mg/L; therefore, arsenic concentrations were of specific interest. Principal components analysis was applied to obtain principal component (PC) scores to summarize mixtures of correlated parameters identified as health standards and those identified as aesthetic objectives in the Saskatchewan Drinking Water Quality Standards and Objective. Ordinary, universal, and empirical Bayesian kriging were used to interpolate arsenic concentrations and PC scores in southern Saskatchewan, and the results were compared. Empirical Bayesian kriging performed best across all analyses, based on having the greatest number of variables for which the root mean square error was lowest. While all of the kriging methods appeared to underestimate high values of arsenic and PC scores, empirical Bayesian kriging was chosen to summarize large scale geographic trends in groundwater-sourced drinking water quality and assess exposure to mixtures of trace metals and ions.
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Affiliation(s)
- Lianne McLeod
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada.
| | - Lalita Bharadwaj
- School of Public Health, University of Saskatchewan, 104 Clinic Place Saskatoon, SK S7N 2Z4, Canada.
| | - Tasha Epp
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada.
| | - Cheryl L Waldner
- Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada.
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Development and Validation of Capillary Electrophoresis Method for Simultaneous Determination of Six Pharmaceuticals in Different Food Samples Combining On-line and Off-line Sample Enrichment Techniques. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-1024-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Fujioka T, Kodamatani H, Aizawa H, Gray S, Ishida KP, Nghiem LD. Role of membrane fouling substances on the rejection of N-nitrosamines by reverse osmosis. WATER RESEARCH 2017; 118:187-195. [PMID: 28431351 DOI: 10.1016/j.watres.2017.03.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 06/07/2023]
Abstract
The impact of fouling substances on the rejection of four N-nitrosamines by a reverse osmosis (RO) membrane was evaluated by characterizing individual organic fractions in a secondary wastewater effluent and deploying a novel high-performance liquid chromatography-photochemical reaction-chemiluminescence (HPLC-PR-CL) analytical technique. The HPLC-PR-CL analytical technique allowed for a systematic examination of the correlation between the fouling level and the permeation of N-nitrosamines in the secondary wastewater effluent and synthetic wastewaters through an RO membrane. Membrane fouling caused by the secondary wastewater effluent led to a notable decrease in the permeation of N-nitrosodimethylamine (NDMA) while a smaller but nevertheless discernible decrease in the permeation of N-nitrosomethylethylamine (NMEA), N-nitrosopyrrolidine (NPYR) and N-nitrosomorpholine (NMOR) was also observed. Fluorescence spectrometry analysis revealed that major foulants in the secondary wastewater effluent were humic and fulvic acid-like substances. Analysis using the size exclusion chromatography technique also identified polysaccharides and proteins as additional fouling substances. Thus, further examination was conducted using solutions containing model foulants (i.e., sodium alginate, bovine serum albumin, humic acid and two fulvic acids). Similar to the secondary wastewater effluent, membrane fouling with fulvic acid solutions resulted in a decrease in N-nitrosamine permeation. In contrast, membrane fouling with the other model foulants resulted in a negligible impact on N-nitrosamine permeation. Overall, these results suggest that the impact of fouling on the permeation of N-nitrosamines by RO is governed by specific small organic fractions (e.g. fulvic acid-like organics) in the secondary wastewater effluent.
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Affiliation(s)
- Takahiro Fujioka
- Water and Environmental Engineering, Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
| | - Hitoshi Kodamatani
- Division of Earth and Environmental Science, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima, 890-0065, Japan
| | - Hidenobu Aizawa
- National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Stephen Gray
- Institute for Sustainability and Innovation, Victoria University, Hoppers Ln, Werribee, VIC, 3030, Australia
| | - Kenneth P Ishida
- Research & Development Department, Orange County Water District, 18700 Ward Street, Fountain Valley, CA 92708, USA
| | - Long D Nghiem
- Strategic Water Infrastructure Laboratory, School of Civil Mining and Environmental Engineering, The University of Wollongong, NSW, 2522, Australia
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Zhao Y, Kuang J, Zhang S, Li X, Wang B, Huang J, Deng S, Wang Y, Yu G. Ozonation of indomethacin: Kinetics, mechanisms and toxicity. JOURNAL OF HAZARDOUS MATERIALS 2017; 323:460-470. [PMID: 27233207 DOI: 10.1016/j.jhazmat.2016.05.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/06/2016] [Accepted: 05/08/2016] [Indexed: 05/27/2023]
Abstract
Ozonation of a commonly used non-steroidal anti-inflammatory drug indomethacin (IM) was studied. Kinetic constants of IM with ozone and hydroxyl radicals were measured at an order of magnitude of 105M-1s-1 and 109M-1s-1, respectively. IM was degraded within 7min under the lowest ozone dose, but TOC removal was only 50% even under the highest ozone dose used in the experiments. Ozone rather than hydroxyl radicals was found to be the main oxidant during reaction, with a contribution rate of 80% under pH 7. Six intermediates were identified by high resolution mass spectrometer. Nitrogen atom, CC double bond and benzene ring were found to be the main reaction sites. Electrophilic attack or Criegee cyclo-addition were proved to be the most probable pathways at the first step. The formation mechanism of one of the ozone products was first proposed during the experiment, then confirmed by the density functional theory (DFT) calculation. Acetic acid, formic acid and oxalic acid were detected as small molecule organic products. The toxicity change during ozonation was measured by luminescent bacterium with results showing that the toxicity can be reduced to zero when ozone dose was high enough.
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Affiliation(s)
- Yue Zhao
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Jiangmeng Kuang
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Siyu Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering, and Institute of Applied Ecology, Chinese Academy of Science, Shenyang 110016, China
| | - Xiang Li
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Bin Wang
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Jun Huang
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Shubo Deng
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Yujue Wang
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China
| | - Gang Yu
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing 100084, China.
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15
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Richard AM, Judson RS, Houck KA, Grulke CM, Volarath P, Thillainadarajah I, Yang C, Rathman J, Martin MT, Wambaugh JF, Knudsen TB, Kancherla J, Mansouri K, Patlewicz G, Williams AJ, Little SB, Crofton KM, Thomas RS. ToxCast Chemical Landscape: Paving the Road to 21st Century Toxicology. Chem Res Toxicol 2016; 29:1225-51. [PMID: 27367298 DOI: 10.1021/acs.chemrestox.6b00135] [Citation(s) in RCA: 386] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The U.S. Environmental Protection Agency's (EPA) ToxCast program is testing a large library of Agency-relevant chemicals using in vitro high-throughput screening (HTS) approaches to support the development of improved toxicity prediction models. Launched in 2007, Phase I of the program screened 310 chemicals, mostly pesticides, across hundreds of ToxCast assay end points. In Phase II, the ToxCast library was expanded to 1878 chemicals, culminating in the public release of screening data at the end of 2013. Subsequent expansion in Phase III has resulted in more than 3800 chemicals actively undergoing ToxCast screening, 96% of which are also being screened in the multi-Agency Tox21 project. The chemical library unpinning these efforts plays a central role in defining the scope and potential application of ToxCast HTS results. The history of the phased construction of EPA's ToxCast library is reviewed, followed by a survey of the library contents from several different vantage points. CAS Registry Numbers are used to assess ToxCast library coverage of important toxicity, regulatory, and exposure inventories. Structure-based representations of ToxCast chemicals are then used to compute physicochemical properties, substructural features, and structural alerts for toxicity and biotransformation. Cheminformatics approaches using these varied representations are applied to defining the boundaries of HTS testability, evaluating chemical diversity, and comparing the ToxCast library to potential target application inventories, such as used in EPA's Endocrine Disruption Screening Program (EDSP). Through several examples, the ToxCast chemical library is demonstrated to provide comprehensive coverage of the knowledge domains and target inventories of potential interest to EPA. Furthermore, the varied representations and approaches presented here define local chemistry domains potentially worthy of further investigation (e.g., not currently covered in the testing library or defined by toxicity "alerts") to strategically support data mining and predictive toxicology modeling moving forward.
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Affiliation(s)
- Ann M Richard
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Richard S Judson
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Keith A Houck
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Christopher M Grulke
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Patra Volarath
- Center for Food Safety and Nutrition, U.S. Food and Drug Administration , 5100 Paint Branch Parkway, College Park, Maryland 20740, United States
| | - Inthirany Thillainadarajah
- Senior Environmental Employment Program, U.S. Environmental Protection Agency , Research Triangle Park, Durham, North Carolina 27711, United States
| | - Chihae Yang
- Molecular Networks GmbH , Henkestraße 91, 91052 Erlangen, Germany.,Altamira, LLC , 1455 Candlewood Drive, Columbus, Ohio 43235, United States
| | - James Rathman
- Altamira, LLC , 1455 Candlewood Drive, Columbus, Ohio 43235, United States.,Department of Chemical and Biomolecular Engineering, The Ohio State University , 151 W. Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Matthew T Martin
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - John F Wambaugh
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Thomas B Knudsen
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Jayaram Kancherla
- ORISE Fellow, U.S. Environmental Protection Agency, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Kamel Mansouri
- ORISE Fellow, U.S. Environmental Protection Agency, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Grace Patlewicz
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Antony J Williams
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Stephen B Little
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Kevin M Crofton
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
| | - Russell S Thomas
- National Center for Computational Toxicology, Office of Research & Development, U.S. Environmental Protection Agency , Mail Code B205-01, Research Triangle Park, Durham, North Carolina 27711, United States
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