Medical geology of arsenic, selenium and thallium in China

Li, Shehong; Xiao, Tangfu; Zheng, Bo

doi:10.1016/j.scitotenv.2011.02.040

Cited by 164 publications

(71 citation statements)

References 68 publications

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“…The effects of selenium deficit may be observed in the geographic regions with low selenium soils, such as Siberia and a major part of China [16,26,27]. The symptoms of selenium deficit concern many organs and systems and are manifested by decreased activities, as well as by impaired functions and structures that are associated with this microelement, i.e.…”

Section: The Issue Of Selenium Deficitmentioning

confidence: 99%

“…haematopoiesis disorders, hair loss, infertility, rash, nail fractures, and an unpleasant (resembling garlic) mouth odour, as well as various neurological disorders [7,27,37]. The negative consequences of selenium excess on the endocrine system should also be mentioned, including an impaired synthesis of thyroid hormones (TH), growth hormone, and insulin-like growth factor-1 (IGF-1) [7].…”

Section: Prace Poglądowementioning

confidence: 99%

“…Skutki niedoboru selenu możemy obserwować w rejonach geograficznych, gdzie stwierdzono obecność gleby ubogiej w ten pierwiastek, takich jak Syberia i większa część obszaru Chin [16,26,27]. Objawy niedoboru selenu dotyczą wielu organów i układów i są związane ze zmniejszoną aktywnością, upośledzeniem funkcji i struktury białek związanych z tym mikroelementem, tak zwanych selenoprotein [28].…”

Section: Prace Poglądoweunclassified

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The role of selenium in thyroid gland pathophysiology

Stuss¹,

Michalska-Kasiczak

Sewerynek³

2017

Endokrynologia Polska

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It is now assumed that proper functioning of the thyroid gland (TG), beside iodine, requires also a number of elements, including selenium, iron, zinc, copper, and calcium. In many cases, only an adequate supply of one of these microelements (e.g. iodine) may reveal symptoms resulting from deficits of other microelements (e.g. iron or selenium). Selenium is accounted to the trace elements of key importance for homeostasis of the human system, in particular, for the proper functioning of the immune system and the TG. Results of epidemiological studies have demonstrated that selenium deficit may affect as many as one billion people in many countries all over the world. A proper sequence of particular supplementations is also worth emphasising for the significant correlations among the supplemented microelements. For example, it has been demonstrated that an excessive supplementation of selenium may enhance the effects of iodine deficit in endemic regions, while proper supplementation of selenium in studied animals may alleviate the consequences of iodine excess, preventing destructive-inflammatory lesions in the TG. This paper is a summary of the current knowledge on the role of selenium in the functionality of the TG.

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Section: The Issue Of Selenium Deficitmentioning

confidence: 99%

Section: Prace Poglądowementioning

confidence: 99%

Section: Prace Poglądoweunclassified

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The role of selenium in thyroid gland pathophysiology

Stuss¹,

Michalska-Kasiczak

Sewerynek³

2017

Endokrynologia Polska

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“…Among the 123 survey school children in KBD area of Lhasa, 36 children (29.3 %, 23 boys and 13 girls) had normal hair Se level, according to the threshold of hair Se value classified by past research efforts related to Se-endemic disease in China [57], quoted in many research papers [51,58,59]. The hair Se level of 25 children (20.3 %, 5 boys and 20 girls) was lower than 0.20 μg/g, which was deemed to be in Se deficiency status.…”

Section: Resultsmentioning

confidence: 99%

Hair Selenium Levels of School Children in Kashin–Beck Disease Endemic Areas in Tibet, China

Chen

Yang

et al. 2015

Biol Trace Elem Res

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Previous studies have shown that the selenium (Se) deficiency is an important factor for the etiology of KashinBeck disease (KBD). Although KBD is presently controlled in most regions of China, it is still active in the Tibetan Plateau. The present study aimed to assess the nutritional status of selenium in school children by using the Se level in hair as a biomarker in KBD endemic areas of Lhasa in Tibet, China. Hair samples of 155 school children aged 6-15 years were collected in both KBD areas and non-KBD areas of Lhasa in 2013. The Se level in the hair samples was determined by inductive coupled plasma mass spectrometry (ICP-MS). The average concentration of Se in children's hair was 0.232 μg/g in KBD areas of Lhasa, which was significantly higher than the data reported decades ago. A significant difference in hair Se was observed between the boys (0.255 μg/g) and the girls (0.222 μg/g) in the studied KBD areas (P<0

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“…Thallium (Tl) is a non-essential and very toxic element often excluded from the list of priority metallic pollutants [1,2]. Thallium is regarded to be more toxic to humans than mercury, lead and cadmium and notable for causing occupational, accidental and environmental hazards [3,4].…”

Section: Introductionmentioning

confidence: 99%

The adsorption potential and recovery of thallium using green micro-algae from eutrophic water sources

Birungi

Chirwa

2015

Journal of Hazardous Materials

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Thallium (Tl) is a highly volatile and toxic heavy metal regarded to cause pollution even at very low concentrations of several parts per million. Despite the extremely high risk of Tl in the environment, limited information on removal/recovery exists. The study focussed on the use of green algae to determine the sorption potential and recovery of Tl. From the study, removal efficiency was achieved at 100% for lower concentrations of ≥ 150 mg/L of Tl. At higher concentrations in a range of 250-500 mg/L, the performance of algae was still higher with sorption capacity ( max q ) between 830 and 1000 mg/g. Generally, Chlorella vulgaris was the best adsorbent with a high max q and lower affinity of 1000 mg/g and 1.11 L/g respectively. When compared to other studies on Tl adsorption, the tested algae showed a better max q than most adsorbents. The kinetic studies showed better correlation co-efficient of ≤ 0.99 for Pseudo-second order model than the first order model. Recovery was achieved highest for Chlorella vulgaris using nitric acid at 93.3%. The strongest functional groups responsible for Tl binding on the algal cell wall were carboxyl and phenols. Green algae from freshwater bodies showed significant potential for Tl removal/recovery from industrial wastewater.

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Medical geology of arsenic, selenium and thallium in China

Cited by 164 publications

References 68 publications

The role of selenium in thyroid gland pathophysiology

The role of selenium in thyroid gland pathophysiology

Hair Selenium Levels of School Children in Kashin–Beck Disease Endemic Areas in Tibet, China

The adsorption potential and recovery of thallium using green micro-algae from eutrophic water sources

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