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Abstract
Accumulating evidence suggests that living in areas of high surrounding greenness or even brief exposures to areas of high greenery is conducive to cardiovascular health, which may be related to the environmental, social, psychological, and physiological benefits of greenspaces. Recent data from multiple cross-sectional, longitudinal, and cohort studies suggest that living in areas of high surrounding greenness is associated with a lower risk of all-cause and cardiovascular mortality. High levels of neighborhood greenery have been linked also to a decrease in the burden of cardiovascular disease risk factors as reflected by lower rates of hypertension, dyslipidemia, and diabetes. Those who live in greener environments report better mental health and more frequent social interactions, which can benefit cardiovascular health as well. In this narrative review, we discuss evidence linking greenspaces to cardiovascular health as well as the potential mechanisms underlying the beneficial effects of greenspaces, including the impact of vegetation on air, noise and light pollution, ambient temperature, physical activity, mental health, and biodiversity. We review literature on the beneficial effects of acute and chronic exposure to nature on cardiovascular disease risk factors, inflammation and immune function, and we highlight the potential cardiovascular effects of biogenic volatile organic compounds that are emitted by trees and shrubs. We identify current knowledge gaps in this area and underscore the need for additional population studies to understand more clearly and precisely the link between greenness and health. Such understanding is urgently needed to fully redeem the promise of greenspaces in preventing adverse environmental exposures, mitigating the effects of climate change, and creating healthier living environments.
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Affiliation(s)
- Rachel J Keith
- Christina Lee Brown Envirome Institute (R.J.K., J.L.H., A.B.)
- Department of Medicine (R.J.K., A.B.), University of Louisville
| | - Joy L Hart
- Christina Lee Brown Envirome Institute (R.J.K., J.L.H., A.B.)
- Department of Communication (J.L.H.), University of Louisville
| | - Aruni Bhatnagar
- Christina Lee Brown Envirome Institute (R.J.K., J.L.H., A.B.)
- Department of Medicine (R.J.K., A.B.), University of Louisville
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2
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Maswanganyi S, Gusain R, Kumar N, Fosso-Kankeu E, Waanders FB, Ray SS. Bismuth Molybdate Nanoplates Supported on Reduced Graphene Oxide: An Effective Nanocomposite for the Removal of Naphthalene via Adsorption-Photodegradation. ACS OMEGA 2021; 6:16783-16794. [PMID: 34250338 PMCID: PMC8264845 DOI: 10.1021/acsomega.1c01296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons are a class of persistent organic water pollutants that raise serious concerns owing to their carcinogenicity and other negative impacts on humans and ecosystems. In this study, Bi2MoO6/reduced graphene oxide (rGO) nanocomposites were designed and prepared for the adsorption-assisted photodegradation of naphthalene molecules in an aqueous medium. The synthesized Bi2MoO6 nanoplates and Bi2MoO6/rGO nanocomposites were characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, high-resolution transmission microscopy, X-ray photoelectron spectroscopy, ultraviolet spectroscopy, Brunauer-Emmett-Teller, and photoluminescence measurements. The photodegradation of naphthalene molecules was observed to assess the photocatalytic characteristics of the samples under visible light. The Bi2MoO6/rGO nanocomposites exhibited significantly improved photocatalytic efficiency compared to pure Bi2MoO6. Among the nanocomposites, those containing 2 wt % rGO showed the best photocatalytic activity. The incorporation of rGO enhanced the visible light absorption and decreased the recombination rate of photogenerated charge carriers. Moreover, a Bi2MoO6/rGO nanocomposite showed excellent reusability for five cycles.
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Affiliation(s)
- Shelter Maswanganyi
- Water
Pollution Monitoring and Remediation Initiatives Research Group, School
of Chemical and Minerals Engineering, North
West University, P. Bag X6001, Potchefstroom 2520, South
Africa
| | - Rashi Gusain
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa
| | - Neeraj Kumar
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
| | - Elvis Fosso-Kankeu
- Water
Pollution Monitoring and Remediation Initiatives Research Group, School
of Chemical and Minerals Engineering, North
West University, P. Bag X6001, Potchefstroom 2520, South
Africa
| | - Frans Boudewijn Waanders
- Water
Pollution Monitoring and Remediation Initiatives Research Group, School
of Chemical and Minerals Engineering, North
West University, P. Bag X6001, Potchefstroom 2520, South
Africa
| | - Suprakas Sinha Ray
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa
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Changes Induced by Self-Burning in Technosols from a Coal Mine Waste Pile: A Hydropedological Approach. GEOSCIENCES 2021. [DOI: 10.3390/geosciences11050195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Coal mining originates environmental impacts on soil and water bodies, including the leaching of Potentially Toxic Elements (PTEs) and Polycyclic Aromatic Hydrocarbons (PAHs) in mine waste piles. This research aims to identify and characterize changes induced by self-burning in Technosols from a coal mine waste pile by means of a comprehensive hydropedological assessment encompassing geochemical, mineralogical, and hydrological data, bearing in mind the potential leaching of PTEs and PAHs. The soil profile from two contiguous areas (an area with normal pedological evolution vs. an area affected by self-burning) was characterized in terms of morphological features. Each soil horizon was sampled and analyzed for geochemical and mineralogical characterization. The unsaturated hydraulic conductivity (Ki) was also measured in all soil horizons. Finally, the leaching potential of PTEs and PAHs in water was evaluated. Several changes induced by self-burning were identified in the studied Technosols: development of specific soil horizons; destruction of humified organic matter; contrasting geochemical composition, especially in the deeper horizons; mineralogical modifications, pointing to clay minerals with higher ion exchange capacity and higher specific surface by sulphates of lower structural order; diverse Ki values in the intermediate and lower part of the soil profile; and specific susceptibility to leaching of PTEs and PAHs. The research demonstrated that self-burning causes severe changes of hydropedological relevance, with influence on the leaching of PTEs and PAHs.
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Sazykin IS, Minkina TM, Khmelevtsova LE, Antonenko EM, Azhogina TN, Dudnikova TS, Sushkova SN, Klimova MV, Karchava SK, Seliverstova EY, Kudeevskaya EM, Konstantinova EY, Khammami MI, Gnennaya NV, Al-Rammahi AAK, Rakin AV, Sazykina MA. Polycyclic aromatic hydrocarbons, antibiotic resistance genes, toxicity in the exposed to anthropogenic pressure soils of the Southern Russia. ENVIRONMENTAL RESEARCH 2021; 194:110715. [PMID: 33444610 DOI: 10.1016/j.envres.2021.110715] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 11/02/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
The influence of anthropogenic pollution, particularly with polycyclic aromatic hydrocarbons (PAHs) on soil toxicity and spread of antibiotic resistance genes (ARGs) is extremely important nowadays. We studied 20 soil samples from a technogenically polluted site, municipal solid wastes (MSW) landfills, and rural settlements in the southwestern part of the Rostov Region of Russia. A close correlation was established between the results of biosensor testing for integral toxicity, the content of genes for the biodegradation of hydrocarbons, and the concentration of PAHs in soils. The relation between the quantitative content of ARGs and the qualitative and quantitative composition of PAHs has not been registered. Soils subjected to different types of the anthropogenic pressure differed in PAHs composition. The technogenic soils are the most polluted ones. These soils are enriched with 5 ring PAHs and carry the maximum variety of assayed ARGs, despite the fact that they do not receive household or medical waste.
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Affiliation(s)
- I S Sazykin
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T M Minkina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - L E Khmelevtsova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E M Antonenko
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T N Azhogina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T S Dudnikova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - S N Sushkova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - M V Klimova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - Sh K Karchava
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E Yu Seliverstova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E M Kudeevskaya
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E Yu Konstantinova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - M I Khammami
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - N V Gnennaya
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - A A K Al-Rammahi
- Technical University Al-Furat Al-Awsat, 70, Hill St., Najaf, 54003, Iraq
| | - A V Rakin
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute for Bacterial Infections and Zoonoses, 96a, Naumburger St., Jena, D-07743, Germany
| | - M A Sazykina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation.
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