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Avaliação ambiental, biomonitoramento humano e remediação química de arsênio com utilização de nanomaterial magnético em uma região de mineração em Paracatu, MG
| Content Provider | Semantic Scholar |
|---|---|
| Author | Faria, Márcia Cristina Da Silva |
| Copyright Year | 2015 |
| Abstract | Faria, M. C. S. Environmental evaluation, human biomonitoring and chemical remediation of arsenic with magnetic nanomaterial in a mining region from Paracatu-MG 2015. 79f. Thesis (Ph.D., Doctorate). Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 2015. The emission of waste has contributed immensely to humans become vulnerable and exposed to toxic chemicals, among them, the arsenic. This element occupies the first place in the list of substances of high priority, with high toxicological risk and exposure according Agency for Toxic Substances and Disease Registry (ATSDR) of Centers for Disease Control and Prevention (CDC). Exposure to arsenic is associated with the appearance of various types of cancer, diabetes, atherosclerosis, cardiovascular disease, pulmonary, immunological, hematological, gastrointestinal, hepatic, renal, neurological, among others. One of the major anthropogenic sources of arsenic in the world is mining, which can contribute to contamination of soil, water, air and food. An example of environmental contamination by arsenic in Brazil occurs in the Paracatu city of –MG, due to the operation of a gold mine. However, little is known about the risks of the local population to arsenic exposure, although several effects typically associated with high exposure to this toxic chemical. Then, the aims of this study were: (i) assess the concentration of arsenic in particulate matter samples, surface freshwater samples (sub-basin of the Paracatu river), soil and of treated water available for human consumption in neighborhoods with nearby mining region; (ii) Evaluate the concentration of arsenic in urine and nail samples of residents from region of item (i); and (iii) propose a method for environmental remediation of contaminated water samples from the region using magnetic nanomaterial. The values of particulate matter concentration showed large variations between regions under study, but were within the limit established by ATSDR from 20 to 100 ng /m in urban areas. As for the surface water samples showed alterations values in relation with the 10μg L established according to CONAMA 357 of 2005. The concentrations in drinking water generally were within the established limits. Soil samples showed high As concentrations. The values in urine and nail showed since lower values than the minimum limit of detection ( < LOD) until maximum values of 9,210μg g -1 creatinine in urine and 31,502ng g -1 in nail. Finally, the proposed chemical remediation method showed high efficiency for adsorption of As, with maximum adsorption capacity of 37.3 mg g. It is easily possible its application in the remediation of contaminated surface water or in areas of mining wastes. |
| File Format | PDF HTM / HTML |
| DOI | 10.11606/T.60.2016.tde-02052016-153613 |
| Alternate Webpage(s) | https://teses.usp.br/teses/disponiveis/60/60134/tde-02052016-153613/publico/Tese_original_Completa.pdf |
| Alternate Webpage(s) | https://doi.org/10.11606/T.60.2016.tde-02052016-153613 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
