Water Disinfection in Rural Areas Demands Unconventional Solar Technologies DOI

Chiheng Chu,

Eric C. Ryberg, Stephanie K. Loeb

et al.

Accounts of Chemical Research, Journal Year: 2019, Volume and Issue: 52(5), P. 1187 - 1195

Published: April 3, 2019

ConspectusProviding access to safe drinking water is a prerequisite for protecting public health. Vast improvements in quality have been witnessed during the last century, particularly urban areas, thanks successful implementation of large, centralized treatment plants and distribution treated via underground networks pipes. Nevertheless, infection by waterborne pathogens through consumption biologically unsafe remains one most significant causes morbidity mortality developing rural areas. In these construction systems impractical due high capital costs lack existing infrastructure. Improving areas demands paradigm shift unconventional, innovative disinfection strategies that are low cost simple implement maintain, while also requiring minimal infrastructure.The point-of-use (POU) techniques at household- or community-scale promising intervention strategy producing immediate health benefits vulnerable populations. Among POU techniques, solar-driven processes considered instrumental this strategy, as typically receive higher than average surface sunlight irradiation. Materials can efficiently harvest produce disinfecting agents pivotal surpassing performance conventional techniques. account, we highlight recent advances materials harness disinfect water. We describe physicochemical properties molecular mechanisms four categories disinfectants be generated harvesting sunlight: heat, germicidal UV radiation, strong oxidants, mild oxidants. Our work materials-based solar technologies discussed detail, with particular focus on materials' mechanistic functions their modes action inactivation three common types (i.e., bacteria, virus, protozoa). conclude different should applied depending source target pathogen variations susceptibility microbial components disparate disinfectants. addition, expect ample research opportunities exist reactor design process engineering scale-up improved materials, accounting infrastructure demand input. Although practical new will face social economic challenges cannot overlooked, novel such play role reducing borne disease burden communities world.

Language: Английский

Transmission of COVID-19 virus by droplets and aerosols: A critical review on the unresolved dichotomy DOI Open Access
Mahesh Jayaweera, Hasini Perera,

Buddhika Gunawardana

et al.

Environmental Research, Journal Year: 2020, Volume and Issue: 188, P. 109819 - 109819

Published: June 13, 2020

Language: Английский

Citations

1247

Antimicrobials and Antibiotic-Resistant Bacteria: A Risk to the Environment and to Public Health DOI Open Access
Liliana Serwecińska

Water, Journal Year: 2020, Volume and Issue: 12(12), P. 3313 - 3313

Published: Nov. 25, 2020

The release of antibiotics to the environment, and consequences presence persistent antimicrobial residues in ecosystems, have been subject numerous studies all parts world. overuse misuse is a common global phenomenon, which substantially increases levels environment rates their spread. Today, it can be said with certainty that mass production use for purposes other than medical treatment has an impact on both human health. This review aims track pathways environmental distribution antimicrobials identify biological effects subinhibitory concentration different compartments; also assesses associated public health risk government policy interventions needed ensure effectiveness existing antimicrobials. recent surge interest this issue driven by dramatic increase number infections caused drug-resistant bacteria worldwide. Our study line One Health approach.

Language: Английский

Citations

615

Simulated Sunlight Rapidly Inactivates SARS-CoV-2 on Surfaces DOI Creative Commons
Shanna Ratnesar-Shumate,

Gregory Williams,

Brian Green

et al.

The Journal of Infectious Diseases, Journal Year: 2020, Volume and Issue: 222(2), P. 214 - 222

Published: May 16, 2020

Previous studies have demonstrated that SARS-CoV-2 is stable on surfaces for extended periods under indoor conditions. In the present study, simulated sunlight rapidly inactivated suspended in either saliva or culture media and dried stainless steel coupons. Ninety percent of infectious virus was every 6.8 minutes 14.3 when exposed to representative summer solstice at 40°N latitude sea level a clear day. Significant inactivation also occurred, albeit slower rate, lower levels. The study provides first evidence may inactivate surfaces, suggesting persistence, subsequently exposure risk, vary significantly between outdoor environments. Additionally, these data indicate natural be effective as disinfectant contaminated nonporous materials.

Language: Английский

Citations

354

Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017 DOI
Alkiviadis Bais, Robyn Lucas, Janet F. Bornman

et al.

Photochemical & Photobiological Sciences, Journal Year: 2018, Volume and Issue: 17(2), P. 127 - 179

Published: Feb. 1, 2018

Language: Английский

Citations

311

Freshwater environments as reservoirs of antibiotic resistant bacteria and their role in the dissemination of antibiotic resistance genes DOI
Chika Felicitas Nnadozie, Oghenekaro Nelson Odume

Environmental Pollution, Journal Year: 2019, Volume and Issue: 254, P. 113067 - 113067

Published: Aug. 20, 2019

Language: Английский

Citations

292

Visible-light photocatalysts: Prospects and challenges DOI Creative Commons

Aleksandra B. Djurišić,

Yanling He, Alan Man Ching Ng

et al.

APL Materials, Journal Year: 2020, Volume and Issue: 8(3)

Published: March 1, 2020

In this research update, we discuss the visible-light photocatalysis. Due to potential of utilizing freely available solar energy for environmental remediation and fuel generation, topic has been increasing interest. Huge amount work done in developing a large variety photocatalyst materials, advances have made understanding process. Nevertheless, substantial challenges remain. Some those could possibly be solved by better but many cases, biggest problem is whether photocatalysis scaled up an industrial process that would cost-competitive existing technologies. Here, different types photocatalysts their applications outline various need addressed development practically relevant materials systems.

Language: Английский

Citations

230

Singlet Oxygen Quantum Yields in Environmental Waters DOI Creative Commons
Rachele Ossola,

Oskar Martin Jönsson,

Kyle J. Moor

et al.

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(7), P. 4100 - 4146

Published: March 8, 2021

Singlet oxygen (1O2) is a reactive species produced in sunlit waters via energy transfer from the triplet states of natural sensitizers. There has been an increasing interest measuring apparent 1O2 quantum yields (ΦΔ) aquatic and atmospheric organic matter samples, driven part by fact that this parameter can be used for environmental fate modeling contaminants to advance our understanding dissolved photophysics. However, lack reproducibility across research groups publications remains challenge significantly limits usability literature data. In first review, we critically evaluate experimental techniques have determine ΦΔ values matter, identify quantify sources errors potentially explain large variability literature, provide general recommendations future studies. second part, qualitative overview known trends as function type, isolation extraction procedures, bulk water chemistry parameters, molecular spectroscopic features, chemical treatments, wavelength, season, location. This review supplemented with comprehensive database samples.

Language: Английский

Citations

193

Antimicrobial TiO2 nanocomposite coatings for surfaces, dental and orthopaedic implants DOI Creative Commons
Vignesh Kumaravel, Keerthi M. Nair, Snehamol Mathew

et al.

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 416, P. 129071 - 129071

Published: Feb. 23, 2021

Engineering of self-disinfecting surfaces to constrain the spread SARS-CoV-2 is a challenging task for scientific community because human coronavirus spreads through respiratory droplets. Titania (TiO2) nanocomposite antimicrobial coatings one ideal remedies disinfect pathogens (virus, bacteria, fungi) from common under light illumination. The photocatalytic disinfection efficiency recent TiO2 surfaces, dental and orthopaedic implants are emphasized in this review. Mostly, inorganic metals (e.g. copper (Cu), silver (Ag), manganese (Mn), etc), non-metals fluorine (F), calcium (Ca), phosphorus (P)) two-dimensional materials MXenes, MOF, graphdiyne) were incorporated with regulate charge transfer mechanism, surface porosity, crystallinity, microbial efficiency. activity was evaluated against most crucial pathogenic microbes such as Escherichia coli, methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, Legionella pneumophila, Streptococcus mutans, T2 bacteriophage, H1N1, HCoV-NL63, vesicular stomatitis virus, bovine coronavirus. Silane functionalizing agents polymers used coat titanium (Ti) metal introduce superhydrophobic features avoid adhesion. disclosed exceptional bio-corrosion resistance, durability, biocompatibility, bone-formation capability, long-term Moreover, commercial trend, techno-economics, challenges, prospects also discussed briefly.

Language: Английский

Citations

188

Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020 DOI Creative Commons
Rachel Ε. Neale, Paul W. Barnes,

T. Matthew Robson

et al.

Photochemical & Photobiological Sciences, Journal Year: 2021, Volume and Issue: 20(1), P. 1 - 67

Published: Jan. 1, 2021

Abstract This assessment by the Environmental Effects Assessment Panel (EEAP) of United Nations Environment Programme (UNEP) provides latest scientific update since our most recent comprehensive (Photochemical and Photobiological Sciences, 2019, 18, 595–828). The interactive effects between stratospheric ozone layer, solar ultraviolet (UV) radiation, climate change are presented within framework Montreal Protocol Sustainable Development Goals. We address how these global environmental changes affect atmosphere air quality; human health; terrestrial aquatic ecosystems; biogeochemical cycles; materials used in outdoor construction, energy technologies, fabrics. In many cases, there is a growing influence from seasonality extreme events due to change. Additionally, we assess transmission severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which responsible for COVID-19 pandemic, context linkages with UV radiation Protocol.

Language: Английский

Citations

173

Engineering and modeling perspectives on photocatalytic reactors for water treatment DOI
Dawei Wang, Miguel Ángel Mueses,

José Angel Colina Márquez

et al.

Water Research, Journal Year: 2021, Volume and Issue: 202, P. 117421 - 117421

Published: July 11, 2021

Language: Английский

Citations

168