Risk of Collapse in Water Quality in the Guandu River (Rio de Janeiro, Brazil)

Bacha, Leonardo; Ventura, Rodrigo; Barrios, M. A.; Seabra, Jean de Aguiar; Tschoeke, Diogo; Garcia, Gizele D.; Masi, Bruno Pereira; Macedo, Larissa; Godoy, José Marcus; Cosenza, Carlos Alberto Nunes; Rezende, Carlos Eduardo de; Lima, Vinícius Santos; Ottoni, Adacto Benedicto; Thompson, Cristiane; Thompson, Fabiano L.

doi:10.1007/s00248-021-01839-z

Cited by 11 publications

(3 citation statements)

References 60 publications

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“…HAdV sequences were classified as F40 and F41, enteric types most associated to acute gastroenteritis (AG) cases in young children (Rafie et al, 2021;Tahmasebi et al, 2020). The presence of enteric viruses may reflect the epidemiological scenario of AG in the metropolitan area of Rio de Janeiro, since this area suffers from inadequate water distribution, sanitation, and investments in hygiene programs (Bacha et al, 2021;Faria et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Investigation of Human and Animal Viruses in Water Matrices from a Rural Area in Southeastern Region of Brazil and Their Potential Use as Microbial Source-Tracking Markers

et al. 2023

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This study assessed the sources of contamination of water matrices in a rural area using detection of a host-specific virus (human adenovirus [HAdV], porcine adenovirus [PAdV] and bovine polyomaviruses [BoPyV]) as potential microbial sourcetracking tool, and rotavirus A [RVA], given its epidemiological importance in Brazil. From July 2017 to June 2018, 92 samples were collected from eight points (P1-P8) of surface and raw waters in southeastern region of Brazil. Fifty-five (59.8%) were positive for HAdV, 41 (44.5%) for RVA, 10 (10.9%) for PAdV and four (4.3%) for BoPyV. HAdV and RVA were detected at all sites, and over the entire sampling period, PAdV was detected at a porcine breeding area and at Guarda River site, presenting high concentrations up to 2.6 × 10 9 genome copies per liter [GC/L], and viral concentrations ranging from 9.6 × 10 1 to 7.1 × 10 7 , while BoPyV (1.5 × 10 4 GC/L-9.2 × 10 5 GC/L) was only detected in samples from the bovine breeding areas. The combination of human and animal virus circulation presents a potential impact in the environment due to raw sewage discharge from regional communities, as well as potential hazard to human and animal health.

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Section: Discussionmentioning

confidence: 99%

Investigation of Human and Animal Viruses in Water Matrices from a Rural Area in Southeastern Region of Brazil and Their Potential Use as Microbial Source-Tracking Markers

et al. 2023

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“…In these channels, the pH correction occurs with the addition of quicklime. Fluoride is also applied to treated water as an auxiliary agent in the fight against dental caries 68 .…”

Section: Methodsmentioning

confidence: 99%

Mobile resistome of microbial communities and antimicrobial residues from drinking water supply systems in Rio de Janeiro, Brazil

Bianco

Farias

Gonçalves-Brito

et al. 2022

Sci Rep

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Antibiotic resistance genes (ARGs) are widespread in the environment due to the overuse of antibiotics and other pollutants, posing a threat to human and animal health. In this study, we evaluated antimicrobial residues, bacterial diversity and ARGs in two important watersheds, Guandu and São João, that supply drinking water to Rio de Janeiro city, Brazil. In addition, tap water samples were collected from three different cities in Rio de Janeiro State, including the metropolitan area of Rio de Janeiro city. Clarithromycin, sulfamethoxazole and azithromycin were found in untreated water and drinking water in all samples. A greater abundance of Proteobacteria was observed in Guandu and São João watersheds, with most of the sequences belonging to the Gammaproteobacteria class. A plasmidome-focused metagenomics approach revealed 4881 (Guandu), 3705 (São João) and 3385 (drinking water) ARGs mainly associated with efflux systems. The genes encoding metallo-β-lactamase enzymes (blaAIM, blaGIM, blaIMP, and blaVIM) were detected in the two watersheds and in drinking water samples. Moreover, we demonstrated the presence of the colistin resistance genes mcr-3 and mcr-4 (both watersheds) and mcr-9 (drinking water and Guandu) for the first time in Brazil. Our data emphasize the importance of introducing measures to reduce the disposal of antibiotics and other pollutants capable of promoting the occurrence and spread of the microbial resistome on aquatic environments and predicting possible negative impacts on human health.

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“…LMB has recently been (mis)used as a palliative measure to control cyanobacterial blooms in Guandu Lagoon, Brazil (Bacha et al, 2021). This misuse and the following conclusion were responded too , and my results (Chapter 2) underpin that SPS like LMB and AMZ cannot direct kill algae cells as "emergence management", also, it was not developed as, nor should be considered a panacea for the management of cyanobacteria nuisance (Chapter 2).…”

Section: Sol I D-phas E P S or Be Nt S -Lm B Am Zmentioning

confidence: 96%

Tackling cyanobacterial blooms : Evaluating compounds and techniques for effective eutrophication management across different scales

Kang

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The purpose of this thesis was to investigate various potential compounds and techniques to manage eutrophication and mitigate cyanobacteria blooms. This research was conducted on different scales, beginning with laboratory experiments (Chapters 2, 3 and 4), then processing to in situ enclosure study (Chapter 5), and ultimately culminating in a large-scale intervention in a 114 ha shallow lake (Chapter 6).In-lake measures are gaining attention as complementary measures to speed up recovery in lakes and ponds suffering from nuisance eutrophication issues. In-lake measures must be efficient, easy to apply, and relatively cheap and safe, which means minimizing unwanted consequences, such as cyanotoxin releases. This thesis starts by evaluating the impact of nine commercially available products on a common bloom-forming cyanobacterium (Microcystis aeruginosa) and cyanotoxin (microcystins) releases (Chapter 2).According to Chapter 2, we learned that copper-based algaecides have excellent properties for killing M. aeruginosa, yet they may also be toxic to non-target zooplankton grazers, such as Daphnia magna, which play an important role in the water ecosystem. Thus, in Chapter 3, we conducted experiments to assess the impact of four copper-based algaecides on Daphnia magna. P binders (also called Phosphorus sorbents (PS)) as in-lake measures that immobilize the internal P pool are essential to manage eutrophication in the case. While P sorbents induced a milder response on M. aeruginosa, they were efficient in reducing phosphate concentration (Chapter 2). As abiotic factors might affect their efficiency, PS was tested under a realistic pH and temperature range (Chapter 4).Chapter 5 involved an enclosure study in a pond to investigate dredging, lanthanum-modified bentonite clay (LMB), aluminium-modified zeolite (AMZ) and iron chloride (FeCl2), which was partly studied in Chapters 2 and 4, in mitigating nutrient release from sediment.Building on the findings of Chapters 2, 4, and 5, a whole lake treatment using LMB was performed in Chapter 6. We collected sediment cores from the large-scale lake at pre-, post-3 months, and post-15 months LMB application and tested the sediment nutrients released under different pH.Lastly, Chapter 7 presents the key findings and provides a discussion on water restoration. Compounds to mitigate cyanobacterial blooms affect growth and toxicity of M i c r oc y s t i s ae r ugi nos a Li Kang, M aí r a M ucci , M i quel Lür l i ng

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Risk of Collapse in Water Quality in the Guandu River (Rio de Janeiro, Brazil)

Cited by 11 publications

References 60 publications

Investigation of Human and Animal Viruses in Water Matrices from a Rural Area in Southeastern Region of Brazil and Their Potential Use as Microbial Source-Tracking Markers

Investigation of Human and Animal Viruses in Water Matrices from a Rural Area in Southeastern Region of Brazil and Their Potential Use as Microbial Source-Tracking Markers

Mobile resistome of microbial communities and antimicrobial residues from drinking water supply systems in Rio de Janeiro, Brazil

Tackling cyanobacterial blooms : Evaluating compounds and techniques for effective eutrophication management across different scales

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