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The effect of the antibiotic tetracycline on the growth and photosynthetic activity of the diatoms Cyclotella caspia Grunow, 1878, and Thalassiosira weissflogii (Grunow) G.A. Fryxell & Hasle, 1977, has been studied. The rate of tetracycline concentration decreases in the medium with and without has been estimated. The expediency and prospects of using diatoms as promising objects for water purification from tetracycline are shown. It was found that the rate and efficiency of tetracycline removal from the medium in the presence of algae depends on the initial content of the pollutant in the medium. The maximum efficiency of antibiotic removal is observed at concentrations of the pollutant provoking the hormesis growth of algae at 5 mg/L in C. caspia and 10 mg/L in T. weissflogii. In samples with C. caspia and tetracycline, the residual antibiotic content in the medium was 10-14% lower than in samples without algae. In the experiment with T. weissflogii, this indicator reached 15-16%. At concentrations of the pollutant, 2 and 10 mg/L in C. caspia and 2 and 5 mg/L in T. weissflogii, the effectiveness of removing the antibiotic by algae was lower. The residual content of tetracycline in the medium was on average 8-11% lower than in samples without algae. At antibiotic concentrations of 15 and 20 mg/L, the rate of its removal in samples with and without algae did not significantly differ. This result is obviously due to the toxic effect of tetracycline on cells, leading to pronounced inhibition of algae growth and/or death.

MeSH
Anti-Bacterial Agents * metabolism MeSH
Biodegradation, Environmental MeSH
Water Pollutants, Chemical * metabolism MeSH
Water Purification * methods MeSH
Photosynthesis drug effects MeSH
Diatoms * growth & development metabolism drug effects MeSH
Tetracycline * metabolism MeSH
Publication type
Journal Article MeSH

Article

Prevencia vzniku ventilátorovej pneumónie

Harmatová, Petra
Author Harmatová, Petra HNsP Trstená

Sestra. 2025 ; 24 (1-2) : 31-33.

ISSN 1335-9444
Medvik
Source

Article

PBDEs and dechlorane plus contamination in community e-waste recycling: Environmental and health implications in Northeastern Thailand

Toxicology. 2024 ; 509 (-) : 153972. [pub] 20241018

ISSN 1879-3185
Medvik
Source

Electronic waste (e-waste) poses significant environmental and health risks in Thailand due to both domestic production and international imports. A notable portion of this waste is processed in small-scale, community-based workshops, often located in poorer regions, where safety regulations are improperly enforced or entirely ignored. This study focuses on the Kalasin province in Northern Thailand, a region with numerous such workshops, where no comprehensive analysis of exposure to polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DP) has been conducted. The study's objective was to quantify these toxic substances in environmental and biological samples to assess its contamination and human health risks. Environmental samples, including soil, dust, sediment, ash, eggs, crabs, snails, fish, and rice, were collected from e-waste processing sites and compared with control areas. Blood samples from e-waste workers and a control group were also analysed. Gas chromatography coupled with mass spectrometry operated in negative ion chemical ionization (GC-NCI-MS) was used to quantify PBDEs and DP isomers. Results showed significantly higher concentrations of these toxic compounds in e-waste sites compared to control areas. E-waste workers also had elevated levels of these substances in their blood, suggesting exposure through contaminated dust and food. These findings underscore the severe environmental contamination and health risks associated with improper e-waste management, highlighting the urgent need for regulatory measures and improved recycling practices to safeguard both environmental and public health.

MeSH
Hydrocarbons, Chlorinated * analysis blood MeSH
Electronic Waste * analysis MeSH
Halogenated Diphenyl Ethers * analysis toxicity blood MeSH
Risk Assessment MeSH
Environmental Pollutants analysis blood MeSH
Humans MeSH
Environmental Monitoring methods MeSH
Polycyclic Compounds * analysis MeSH
Dust analysis MeSH
Occupational Exposure analysis MeSH
Recycling * MeSH
Environmental Exposure adverse effects analysis MeSH
Animals MeSH
Check Tag
Humans MeSH
Animals MeSH
Publication type
Journal Article MeSH
Geographicals
Thailand MeSH

Article

Vliv fosforu na specifickou produkci kalu a účinnost denitrifikace průmyslových odpadních vod

Bioprospect. 2024 ; 34 (2) : 36-43.

Bioprospect (Praha)
ISSN 1210-1737
Medvik
Source

MeSH
Water Purification methods MeSH
Denitrification MeSH
Phosphorus chemistry MeSH
Phosphoric Acids MeSH
Humans MeSH
Wastewater * analysis chemistry microbiology MeSH
Sewage analysis chemistry MeSH
Industrial Waste MeSH
Check Tag
Humans MeSH

Online article

Odpady ze zdravotní péče - aktuální situace a přechod na oběhové hospodářství
[Medical waste - current situation and the transition to a circular economy]

Hygiena. 2024 ; 69 (3) : 84-89. [pub] 20240930

ISSN 1802-6281
Medvik
Source

Analýza a následná vizualizace změn v produkci odpadu vztažená k různým úrovním územních celků odráží základní trendy ve změnách struktury poskytované péče v letech 2020−2021. Problematika rizik vyplývající z nakládání s odpady ze zdravotní péče je na světové úrovni posouvána směrem k cirkulární ekonomice ve smyslu managementu materiálových toků ve specifickém prostředí zdravotnictví a jeho nárokům na bezpečnost. Role orgánu ochrany veřejného zdraví v této oblasti spočívá v dozoru, jehož obsah lze prakticky strukturovat do podoby kontrolních listů a tím nalézt bezpečné způsoby pro zavedení principů oběhového hospodářství do zdravotnických zařízení. Tlak na společenskou a environmentální odpovědnost ve zdravotnictví ve spojení s řízením materiálových toků a zvýšením míry recyklace vede v současné době k intenzivní diskuzi nejen v akademické sféře, ale i na úrovni politik jednotlivých výrobců zdravotnické techniky a zdravotnických prostředků. Hledání bezpečné cesty pro recyklaci materiálů, které jsou v současnosti převážně spalovány, je úkolem pro všechny zúčastněné aktéry.

The analysis and subsequent visualisation of changes in waste production related to different levels of territorial units reflect the basic trends of changes in the structure of healthcare provision between 2020 and 2021. The issue of risks arising from healthcare waste management is shifting towards a circular economy at the global level in terms of managing material flows in the specific environment of healthcare and its safety requirements. The role of the public health authority in this matter resides in supervision, the content of which can be practically structured into the form of checklists enabling to find safe ways of introducing the principles of circular economy into healthcare facilities. The pursuit of social and environmental responsibility in the healthcare sector in association with the management of material flows and increased recycling rates is currently being intensively discussed not only in academia but also at the policy level of individual manufacturers of medical devices and equipment. Finding a safe way to recycle materials that are currently predominantly incinerated is a challenge for all stakeholders.