The content of dioxins and furans in soils, bottom sediments of water bodies, and tissues of small mammals near the landfill site with municipal solid wastes (Moscow, Russia)

Abstract

For the first time, the levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were characterized in the tissues of wild small mammals living in contaminated sites near a municipal solid waste landfill (Moscow, Russia). The Ural field mice Sylvaemus uralensis, the bank voles Clethrionomys glareolus, and the common shrews Sorex araneus were trapped at 1- and 5-km distances from the landfield "Salariyevo." High-resolution chromatography-mass spectrometry was used to measure the levels of 17 PCDD/Fs congeners in the animal organisms and natural objects (soils, bottom sediments). The values of the total toxic equivalencies (WHO-TEQ) for animals were many times higher than those for soils and bottom sediments. The octo-substituted congeners dominated in the samples from the habitat, whereas the highly toxic 2,3,7,8-substituted ones - in the mammalian tissues. The levels of WHO-TEQ were comparable in the soil samples collected at 1- and 5-km distances from the dump body. The levels of WHO-TEQ in tissues of mammals caught 1 km from the dump were much higher than those of the distant territory inhabitants. The maximum WHO-TEQ levels were found in the shrews, and this has been considered in terms of nutrition characteristics. The data obtained will be used to assess the risks of chronic exposure to low doses of PCDD/Fs contaminating the environment near landfills.

Peculiarity of Marker Genes’ Expression in Bank Voles Clethrionomys Glareolus Characterizing Ecotoxicity Effects of the Territory Contaminated With Dioxins

“…При анализе диаграмм важно учитывать, что наши исследования выполнены на животных из двух функциональных группировок, т.е. фактически из сменяющих друг друга в течение года поколений локальной популяции, ткани которых содержали значимо различимые концентрации диоксинов [17]. Наличие этой разницы позволяет рассматривать регистрируемые эффекты экспрессии маркерных генов не только во взаимосвязи с реакциями организма на разных уровнях (генетическом и эпигенетическом), но и как отражающие последствия воздействия диоксинов и сопутствующих им ксенобиотиков на цикломорфных млекопитающих.…”

Potential landfill sites selection using GIS-based multi-criteria decision analysis in Dodoma capital city, central Tanzania

“…Poor collection of waste, recycling, and uncontrolled dumping results in human and environmental problems (Duve et al, 2015), and may cause contamination of surface and groundwater through leachate, direct contact with surface water, air pollution, land pollution, and associated health impacts on communities (Rikta et al, 2018). Also, various studies indicate the presence of heavy metals in leachate which may lead to death (Rikta et al, 2018;Roumak et al, 2018). Therefore, amongst many reasons, proper landfill sites selection is inevitable in growing cities and towns worldwide (Abedi-Varaki & Davtalab, 2016;Ajibade et al, 2019;Ebistu & Minale, 2013;Khorsandi et al, 2019).…”

Concentration of dioxin and screening level ecotoxicity of pore water from bottom sediments in relation to organic carbon contents

“…Among the contaminants of the aquatic environment, a significant role is played by persistent organic pollutants (POPs), such as polychlorinated dibenzo- p -dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) (Ying et al 2009 ; Förstner et al 2016 ; Roumak et al 2018 ; Urbaniak et al 2016 ). PCDDs/PCDFs toxicity, persistence and bioaccumulation are widely recognised as posing a risk to living organisms (Nie et al 2013 ; Kukučka et al 2015 ).…”