Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Abstract

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“…It is essential to human health in trace amounts but is harmful in excess. According to research (Etteieb et al, 2020, and references therein), possible harmful effects of long-term, low level exposure to selenium should be studied. Selenium deficiency, which is more common, is regarded as a major health problem for 0.5 to 1 billion people worldwide (Haug et al, 2007).…”

“…Most of the Se levels (see Table 4) exceeded the existing selenium water quality guidelines for the protection of freshwater and marine aquatic life (1 µg/L) set by the Canadian Council of Ministers of Environment (Etteieb et al, 2020, and references therein), and the upper limit value (≤0.01 μg/L) of the Type III Chinese groundwater quality standard (GB/T, 2017). Freshwater guidelines for Se set by The Netherlands Water pollution control are 0.09 μg/L and 5.40 μg/L for long-term and short-term occurrences, respectively (Etteieb et al, 2020, and references therein). They have been mostly violated by the Raša CMDs (Medunić et al, 2018a, b, 2019, and the data in Table 4).…”

“…Namely, selenium is the rarest micronutrient, and there are no ores from which Se could be mined as a primary product. CMDs are the initial route of release of Se into surface watercourses (Etteieb et al, 2020). Apart from selenium, radioactivity derived from uranium in coal is also a serious environmental hazard.…”

Investigação Da Potencialidade Adsortiva Da Farinha Da Casca De Banana in-Natura E Modificada Com Tiosemicarbazida Para Remediação De Sb(iii) E Se(iv) Em Águas Naturais / Investigation of Adsorptive Potential of Banana Peel Flour in-Natura and Modified With Thiosemicarbazide for Remediation of Sb(iii) and Se(iv) in Natural Waters

“…Também são reportados estudos que reconhecem a administração de Se como potente agente quimiopreventivo do câncer (SINHA; EL-BAYOUMY, 2004). Entretanto o acúmulo de Seno ambiente por vias de excreção pode desencadear diversos efeitos deletérios em peixes, invertebrados e plantas (ETTEIEB et al, 2020). Em função da crescente presença destes elementos em corpos hídricos, a União Européia (UE) e a Agência de Proteção Ambiental dos Estados Unidos (USEPA) os consideraram como poluentes de preocupação prioritária.…”

Selenite Removal from Water

“…Selenate (SeO4 − ) predominates in oxidizing conditions and is very soluble with low adsorption and precipitation capacities, while selenite (SeO3 2− ) is present in moderate redox potential ranges and neutral pH environments [4]. Increasing reports on water pollution by selenium verify that excess consumption leads to the potential of bioaccumulation to humans and causes adverse health effects, such as selenosis and cancer, which has forced the European Commission to set a Drinking Water Regulation Limit (DWRL) for selenium at 10 μg/L [5,6].…”