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1. Visible-light-driven photocatalytic disinfection mechanism of Pb-BiFeO3/rGO photocatalyst

Author:
Li, Yang; Zhao, Jian; Zhang, Guangshan; Zhang, Lilan; Ding, Shiyuan; Shang, Enxiang; Xia, Xinghui
Source:
Water research 2019 v.161 pp. 251-261
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; bacteria; cell membranes; direct contact; disinfection; drinking water; genes; graphene oxide; hydroxyl radicals; iron; irradiation; lead; light; metal ions; nucleic acids; oxidative stress; photocatalysis; photocatalysts; proteins; solar energy; stress response; transcriptomics; transmission electron microscopy
Abstract:
... While the visible-light-driven photocatalytic disinfection techniques for drinking water have recently attracted tremendous attentions, it is necessary to further improve the solar energy utilization efficiency. In this study, we synthesized Pb-BiFeO3 photocatalysts doped with different amounts of reduced graphene oxide (Pb-BiFeO3/rGO). The photocatalytic disinfection efficiencies toward gram-nega ...
DOI:
10.1016/j.watres.2019.06.011

2. Prevalence and characterization of Staphylococcus aureus in wastewater treatment plants by whole genomic sequencing

Author:
Amirsoleimani, Atena; Brion, Gail M.; Diene, Seydina M.; François, Patrice; Richard, Erin M.
Source:
Water research 2019 v.158 pp. 193-202
ISSN:
0043-1354
Subject:
DNA; Staphylococcus aureus; Staphylococcus epidermidis; acriflavine; genetic variation; hospitals; hosts; methicillin; polymerase chain reaction; sequence analysis; sewage; single nucleotide polymorphism; wastewater treatment
Abstract:
... Infections with Staphylococcus aureus are being spread through contact with the community environment, but the role of wastewater treatment plants in the transmission routes is not defined. This study investigated the prevalence, types, genetic elements, and potential for transmission of S. aureus by these engineered systems. Synchronized sampling events at two wastewater treatment plants were con ...
DOI:
10.1016/j.watres.2019.04.035

3. Catalyst-free activation of persulfate by visible light for water disinfection: Efficiency and mechanisms

Author:
Wang, Wanjun; Wang, Hanna; Li, Guiying; An, Taicheng; Zhao, Huijun; Wong, Po Keung
Source:
Water research 2019 v.157 pp. 106-118
ISSN:
0043-1354
Subject:
DNA; Escherichia coli; Pseudomonas aeruginosa; Staphylococcus aureus; bicarbonates; catalase; catalysts; cell death; cost effectiveness; death; disinfection; heat; hydroxyl radicals; irradiation; light; microorganisms; oxidation; pH; sulfates; superoxide anion; superoxide dismutase; synergism; ultraviolet radiation; virulent strains; wavelengths
Abstract:
... The development of cost-effective water disinfection methods is highly desired to address the problems caused by outbreak of harmful microorganisms. Sulfate radical (•SO4−)-based advanced oxidation technology has attracted increasing attention. However, various catalysts or UV irradiation are usually used to activate persulfate (PS), which is high-cost and the recovery of nano-sized catalysts is a ...
DOI:
10.1016/j.watres.2019.03.071

4. Molybdenum sulfide Co-catalytic Fenton reaction for rapid and efficient inactivation of Escherichia coli

Author:
Liu, Jun; Dong, Chencheng; Deng, Yuanxin; Ji, Jiahui; Bao, Shenyuan; Chen, Cuirong; Shen, Bin; Zhang, Jinlong; Xing, Mingyang
Source:
Water research 2018 v.145 pp. 312-320
ISSN:
0043-1354
Subject:
Escherichia coli K12; Staphylococcus aureus; active sites; bacteria; disinfection; electron paramagnetic resonance spectroscopy; hydrogen peroxide; hydroxyl radicals; iron; molybdenum; molybdenum disulfide; oxidation; photoluminescence; remediation
Abstract:
... As a typical advanced oxidation technology, the Fenton reaction has been employed for the disinfection, owing to the strong oxidizability of hydroxyl radicals (·OH). However, the conventional Fenton system always exhibits a low H₂O₂ decomposition efficiency, leading to a low production yield of ·OH, which makes the disinfection effect unsatisfactory. Herein, we develop a molybdenum sulfide (MoS₂) ...
DOI:
10.1016/j.watres.2018.08.039

5. Solar photo-Fenton disinfection of 11 antibiotic-resistant bacteria (ARB) and elimination of representative AR genes. Evidence that antibiotic resistance does not imply resistance to oxidative treatment

Author:
Giannakis, Stefanos; Le, Truong-Thien Melvin; Entenza, Jose Manuel; Pulgarin, Cesar
Source:
Water research 2018 v.143 pp. 334-345
ISSN:
0043-1354
Subject:
Escherichia coli; Klebsiella pneumoniae; Staphylococcus aureus; antibiotic resistance; bacteria; disinfection; experimental design; genes; human health; regrowth; solar radiation; wastewater
Abstract:
... The emergence of antibiotic resistance represents a major threat to human health. In this work we investigated the elimination of antibiotic resistant bacteria (ARB) by solar light and solar photo-Fenton processes. As such, we have designed an experimental plan in which several bacterial strains (Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae) possessing different drug-susceptib ...
DOI:
10.1016/j.watres.2018.06.062

6. Efficient bacterial inactivation with Z-scheme AgI/Bi2MoO6 under visible light irradiation

Author:
Liang, Jialiang; Liu, Fuyang; Deng, Jun; Li, Mian; Tong, Meiping
Source:
Water research 2017 v.123 pp. 632-641
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; X-ray diffraction; X-ray photoelectron spectroscopy; anions; bacteria; chlorides; disinfection; energy-dispersive X-ray analysis; hydrogen peroxide; irradiation; nitrates; photocatalysts; photoluminescence; redox potential; reflectance spectroscopy; scanning electron microscopy; silver; sulfates; superoxide anion; transmission electron microscopes; transmission electron microscopy
Abstract:
... A novel Z-scheme AgI/Bi2MoO6 hybrid photocatalyst was fabricated via a solvothermal-precipitation approach to disinfect bacteria in water. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopic (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectra (D ...
DOI:
10.1016/j.watres.2017.06.060

7. Inactivation of pathogenic microorganisms in freshwater using HSO5−/UV-A LED and HSO5−/Mn+/UV-A LED oxidation processes

Author:
Rodríguez-Chueca, Jorge; Silva, Tatiana; Fernandes, José R.; Lucas, Marco S.; Puma, Gianluca Li; Peres, José A.; Sampaio, Ana
Source:
Water research 2017 v.123 pp. 113-123
ISSN:
0043-1354
Subject:
Bacillus mycoides; Candida albicans; Escherichia coli; Staphylococcus aureus; Weibull statistics; bacteria; biochemistry; cobalt; disinfection; endospores; free radicals; freshwater; iron; models; oxidation; oxidative stress; pH; physiology; sulfates; ultrastructure; yeasts
Abstract:
... Freshwater disinfection using photolytic and catalytic activation of peroxymonosulphate (PMS) through PMS/UV-A LED and PMS/Mⁿ⁺/UV-A LED [Mⁿ⁺ = Fe²⁺ or Co²⁺] processes was evaluated through the inactivation of three different bacteria: Escherichia coli (Gram-negative), Bacillus mycoides (sporulated Gram-positive), Staphylococcus aureus (non-sporulated Gram-positive), and the fungus Candida albicans ...
DOI:
10.1016/j.watres.2017.06.021

8. Flocculation and antimicrobial properties of a cationized starch

Author:
Liu, Zhouzhou; Huang, Mu; Li, Aimin; Yang, Hu
Source:
Water research 2017 v.119 pp. 57-66
ISSN:
0043-1354
Subject:
Escherichia coli; Gram-negative bacteria; Gram-positive bacteria; Staphylococcus aureus; ammonium chloride; antibacterial properties; cell walls; flocculants; flocculation; kaolin; pH; peptidoglycans; scanning electron microscopy; starch; teichoic acids
Abstract:
... In this study, a series of cationized starch-based flocculants (starch-3-chloro-2-hydroxypropyl triethyl ammonium chloride, St-CTA) containing various quaternary ammonium salt groups on the starch backbone were prepared using a simple etherification reaction. All of the prepared starch-based flocculants show effective performance for the flocculation of kaolin suspension, two bacterial (Escherichi ...
DOI:
10.1016/j.watres.2017.04.043

9. Temporal variations analyses and predictive modeling of microbiological seawater quality

Author:
Lušić, Darija Vukić; Kranjčević, Lado; Maćešić, Senka; Lušić, Dražen; Jozić, Slaven; Linšak, Željko; Bilajac, Lovorka; Grbčić, Luka; Bilajac, Neiro
Source:
Water research 2017 v.119 pp. 160-170
ISSN:
0043-1354
Subject:
Enterococcus; Escherichia coli; European Union; Pseudomonas aeruginosa; Staphylococcus aureus; environmental factors; health promotion; microbiological quality; monitoring; seawater; solar radiation; statistical models; surface water; temporal variation; water pollution; water quality; water quality standards
Abstract:
... Bathing water quality is a major public health issue, especially for tourism-oriented regions. Currently used methods within EU allow at least a 2.2 day period for obtaining the analytical results, making outdated the information forwarded to the public. Obtained results and beach assessment are influenced by the temporal and spatial characteristics of sample collection, and numerous environmental ...
DOI:
10.1016/j.watres.2017.04.046

10. Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3–AgBr

Author:
Ng, Tsz Wai; Zhang, Lisha; Liu, Jianshe; Huang, Guocheng; Wang, Wei; Wong, Po Keung
Source:
Water research 2016 v.90 pp. 111-118
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; antibacterial properties; argon (noble gases); bacteria; calcium; disinfection; hydrogen peroxide; irradiation; light emitting diodes; magnetic materials; magnetism; oxidation; pH; photocatalysis; photocatalysts; sulfates; temperature
Abstract:
... Bacterial inactivation by magnetic photocatalyst receives increasing interests for the ease recovery and reuse of photocatalysts. This study investigated bacterial inactivation by a magnetic photocatalysts, Fe2O3–AgBr, under the irradiation of a commercially available light emitting diode lamp. The effects of different factors on the inactivation of Escherichia coli were also evaluated, in term of ...
DOI:
10.1016/j.watres.2015.12.022

11. Negatively charged hyperbranched polyglycerol grafted membranes for osmotic power generation from municipal wastewater

Author:
Li, Xue; Cai, Tao; Chen, Chunyan; Chung, Tai-Shung
Source:
Water research 2016 v.89 pp. 50-58
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; adhesion; adsorption; bovine serum albumin; energy; lipoic acid; municipal wastewater; osmosis; polymers; power generation; sodium chloride; succinic acid
Abstract:
... Osmotic power holds great promise as a clean, sustainable and largely unexploited energy resource. Recent membrane development for pressure-retarded osmosis (PRO) is making the osmotic power generation more and more realistic. However, severe performance declines have been observed because the porous layer of PRO membranes is fouled by the feed stream. To overcome it, a negatively charged antifoul ...
DOI:
10.1016/j.watres.2015.11.032

12. Fast mineralization and detoxification of amoxicillin and diclofenac by photocatalytic ozonation and application to an urban wastewater

Author:
Moreira, Nuno F.F.; Orge, Carla A.; Ribeiro, Ana R.; Faria, Joaquim L.; Nunes, Olga C.; Pereira, M. Fernando R.; Silva, Adrián M.T.
Source:
Water research 2015 v.87 pp. 87-96
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; amoxicillin; aqueous solutions; carbon; diclofenac; drugs; growth retardation; hormones; microorganisms; mineralization; oxidation; ozonation; ozone; pesticides; photocatalysis; photolysis; pollutants; toxicity; vapors; wastewater
Abstract:
... The degradation of two organic pollutants (amoxicillin and diclofenac) in 0.1 mM aqueous solutions was studied by using advanced oxidation processes, namely ozonation, photolysis, photolytic ozonation, photocatalysis and photocatalytic ozonation. Diclofenac was degraded quickly under direct photolysis by artificial light (medium-pressure vapor arc, λexc > 300 nm), while amoxicillin remained very s ...
DOI:
10.1016/j.watres.2015.08.059

13. Opportunistic pathogens in roof-captured rainwater samples, determined using quantitative PCR

Author:
Ahmed, W.; Brandes, H.; Gyawali, P.; Sidhu, J.P.S.; Toze, S.
Source:
Water research 2014 v.53 pp. 361-369
ISSN:
0043-1354
Subject:
Aeromonas hydrophila; Enterococcus; Escherichia coli; Legionella pneumophila; Pseudomonas aeruginosa; Staphylococcus aureus; indicator species; microbiological risk assessment; pathogens; quantitative polymerase chain reaction; rain; risk; tanks; Queensland
Abstract:
... In this study, quantitative PCR (qPCR) was used for the detection of four opportunistic bacterial pathogens in water samples collected from 72 rainwater tanks in Southeast Queensland, Australia. Tank water samples were also tested for fecal indicator bacteria (Escherichia coli and Enterococcus spp.) using culture-based methods. Among the 72 tank water samples tested, 74% and 94% samples contained ...
DOI:
10.1016/j.watres.2013.12.021

14. Preparation and antibacterial activity of lysozyme and layered double hydroxide nanocomposites

Author:
Yang, Qin-Zheng; Chang, Ying-Yue; Zhao, Hua-Zhang
Source:
Water research 2013 v.47 pp. 6712-6718
ISSN:
0043-1354
Subject:
Fourier transform infrared spectroscopy; Staphylococcus aureus; X-ray diffraction; adsorption; antibacterial properties; bacteria; byproducts; disinfection; lysozyme; nanocomposites; pH
Abstract:
... It is necessary to develop “green” disinfection technology which does not produce disinfection by-products. Lysozyme-layered double hydroxide nanocomposites (LYZ–LDHs) were prepared by intercalating LYZ in LDH for the first time. Their antibacterial activity was evaluated using staphylococcus aureus as a target. The bacteria removal mechanism was also studied. Characterization of LYZ–LDHs by X-ray ...
DOI:
10.1016/j.watres.2013.09.002
PubMed:
24053938

15. Furanone-containing poly(vinyl alcohol) nanofibers for cell-adhesion inhibition

Author:
Gule, Nonjabulo P.; de Kwaadsteniet, Michele; Cloete, Thomas E.; Klumperman, Bert
Source:
Water research 2013 v.47 pp. 1049-1059
ISSN:
0043-1354
Subject:
Staphylococcus aureus; cell adhesion; nanofibers; fluorescence; Salmonella Typhimurium; infrared spectroscopy; scanning electron microscopy; adhesion; Klebsiella pneumoniae; bioluminescence; Pseudomonas aeruginosa; mass spectrometry; gas chromatography; alcohols; bacteria; Escherichia coli
Abstract:
... The 3(2H) furanone derivative 2,5-dimethyl-4-hydroxy-3(2H)-furanone (DMHF) was investigated for its antimicrobial and cell-adhesion inhibition properties against Klebsiella pneumoniae Xen 39, Staphylococcus aureus Xen 36, Escherichia coli Xen 14, Pseudomonas aeruginosa Xen 5 and Salmonella typhimurium Xen 26. Nanofibers electrospun from solution blends of DMHF and poly(vinyl alcohol) (PVA) were te ...
DOI:
10.1016/j.watres.2012.11.012
PubMed:
23261340

16. A multi-beach study of Staphylococcus aureus, MRSA, and enterococci in seawater and beach sand

Author:
Goodwin, Kelly D.; McNay, Melody; Cao, Yiping; Ebentier, Darcy; Madison, Melissa; Griffith, John F.
Source:
Water research 2012 v.46 no.13 pp. 4195-4207
ISSN:
0043-1354
Subject:
Enterococcus; Staphylococcus aureus; beaches; fomites; humans; linear models; methicillin; monitoring; sand; seawater; summer; water quality; water temperature; California
Abstract:
... Incidences of Staphylococcus aureus and methicillin resistant S. aureus (MRSA) have risen worldwide prompting a need to better understand routes of human exposure and whether standard bacterial water quality monitoring practices adequately account for this potential threat. Beach water and sand samples were analyzed during summer months for S. aureus, enterococci, and MRSA at three southern Califo ...
DOI:
10.1016/j.watres.2012.04.001
PubMed:
22652414

17. Survival of environmental and clinical strains of methicillin-resistant Staphylococcus aureus [MRSA] in marine and fresh waters

Author:
Levin-Edens, Emily; Bonilla, Natasha; Meschke, J. Scott; Roberts, Marilyn C.
Source:
Water research 2011 v.45 no.17 pp. 5681-5686
ISSN:
0043-1354
Subject:
Staphylococcus aureus; freshwater; salinity; temperature; Pacific States
Abstract:
... Recent studies have found variable levels of methicillin-resistant Staphylococcus aureus [MRSA] in marine water from temperate and warmer climates suggesting that temperature may play a role in survival of MRSA in the environment. The aim of the study was to compare the survival of clinical and environmental MRSA and MSSA strains in fresh and marine water incubated at 13 °C and 20 °C over 14 days. ...
DOI:
10.1016/j.watres.2011.08.037
PubMed:
21917291

18. Bacterial pathogens in Hawaiian coastal streams—Associations with fecal indicators, land cover, and water quality

Author:
Viau, Emily J.; Goodwin, Kelly D.; Yamahara, Kevan M.; Layton, Blythe A.; Sassoubre, Lauren M.; Burns, Siobhán L.; Tong, Hsin-I; Wong, Simon H.C.; Lu, Yuanan; Boehm, Alexandria B.
Source:
Water research 2011 v.45 no.11 pp. 3279-3290
ISSN:
0043-1354
Subject:
Staphylococcus aureus; watersheds; Clostridium perfringens; nutrients; risk; turbidity; coliphages; runoff; Campylobacter; pathogens; Escherichia coli; Vibrio vulnificus; water quality; agricultural land; Enterococcus; waterborne diseases; land cover; temperature; coastal water; Salmonella; regression analysis; streams
Abstract:
... This work aimed to understand the distribution of five bacterial pathogens in O’ahu coastal streams and relate their presence to microbial indicator concentrations, land cover of the surrounding watersheds, and physical–chemical measures of stream water quality. Twenty-two streams were sampled four times (in December and March, before sunrise and at high noon) to capture seasonal and time of day v ...
DOI:
10.1016/j.watres.2011.03.033
PubMed:
21492899

19. Inactivation and surface interactions of MS-2 bacteriophage in a TiO₂ photoelectrocatalytic reactor

Author:
Cho, Min; Cates, Ezra L.; Kim, Jae-Hong
Source:
Water research 2011 v.45 no.5 pp. 2104-2110
ISSN:
0043-1354
Subject:
Cryptosporidium parvum; Staphylococcus aureus; oocysts; hydroxyl radicals; spores; capsid; titanium dioxide; electrodes; bacteriophages; free radical scavengers; indium; surface interactions; tin; Bacillus subtilis; Klebsiella pneumoniae; disinfection; electrostatic interactions; irradiation; Escherichia coli
Abstract:
... Inactivation of MS-2 bacteriophage in a TiO₂ photoelectrocatalytic system was evaluated, wherein TiO₂ particles were coated onto an indium tin oxide (ITO) electrode and an electrical potential was applied under black light blue (BLB) irradiation. MS-2 phage inactivation was greatly enhanced by anodic potential, whereas cathodic potential completely inhibited inactivation. Experiments performed wit ...
DOI:
10.1016/j.watres.2010.12.017

20. Performance of CHROMagar™ Staph aureus and CHROMagar™ MRSA for detection of Staphylococcus aureus in seawater and beach sand – Comparison of culture, agglutination, and molecular analyses

Author:
Goodwin, K.D.; Pobuda, M.
Source:
Water research 2009 v.43 no.19 pp. 4802-4811
ISSN:
0043-1354
Subject:
water analysis; microbial contamination; Staphylococcus aureus; pathogens; seawater; beaches; sand; agglutination; methicillin; antibiotic resistance; polymerase chain reaction; water quality; California
DOI:
10.1016/j.watres.2009.06.025

21. A seasonal study of the mecA gene and Staphylococcus aureus including methicillin-resistant S. aureus in a municipal wastewater treatment plant [Erratum: 2009 Aug., v. 43, issue 15, p. 3900.]

Author:
Börjesson, Stefan; Melin, Sara; Matussek, Andreas; Lindgren, Per-Eric
Source:
Water research 2009 v.43 no.4 pp. 925-932
ISSN:
0043-1354
Subject:
wastewater treatment; microbial genetics; methicillin; antibiotic resistance; genes; Staphylococcus aureus; prevalence; seasons; polymerase chain reaction; seasonal variation; Sweden
DOI:
10.1016/j.watres.2008.11.036

22. Silver-ion-mediated reactive oxygen species generation affecting bactericidal activity

Author:
Park, Hee-Jin; Kim, Jee-Yeon; Kim, Jaeeun; Lee, Joon-Hee; Hahn, Ji-Sook; Gu, Man Bock; Yoon, Jeyong
Source:
Water research 2009 v.43 no.4 pp. 1027-1032
ISSN:
0043-1354
Subject:
antimicrobial properties; Staphylococcus aureus; hydrogen peroxide; silver; water treatment; microbial growth; paraquat; disinfection; superoxide anion; oxidative stress; Escherichia coli
DOI:
10.1016/j.watres.2008.12.002
PubMed:
19073336

23. UV disinfection of RBC-treated light greywater effluent: Kinetics, survival and regrowth of selected microorganisms

Author:
Gilboa, Y.; Friedler, E.
Source:
Water research 2008 v.42 no.4-5 pp. 1043-1050
ISSN:
0043-1354
Subject:
effluents; wastewater treatment; ultraviolet radiation; plate count; heterotrophs; disinfection; mortality; microbial growth; population dynamics; kinetics; bioreactors; application rate; coliform bacteria; Staphylococcus aureus; Pseudomonas aeruginosa; Clostridium perfringens; animal pathogens; bacteriophages; indicator species; microbial competition
DOI:
10.1016/j.watres.2007.09.027

24. Relationships between Bacteroides 16S rRNA genetic markers and presence of bacterial enteric pathogens and conventional fecal indicators

Author:
Savichtcheva, O.; Okayama, N.; Okabe, S.
Source:
Water research 2007 v.41 no.16 pp. 3615-3628
ISSN:
0043-1354
Subject:
water pollution; feces; bacterial contamination; water quality; enteropathogens; indicator species; coliform bacteria; humans; Bacteroides; Clostridium perfringens; Shigella; Staphylococcus aureus; Vibrio cholerae; Salmonella; genetic markers; host specificity
DOI:
10.1016/j.watres.2007.03.028
PubMed:
17507075