Made available in DSpace on 2014-12-17T15:19:58Z (GMT). No. of bitstreams: 1 LuizFL.pdf: 1831867 bytes, checksum: 040666e9d798b8a1891e7af5671e135c (MD5) Previous issue date: 2006-02-11 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The metal concentrations (Al, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn ) and phosforus(P) had been determined analyzed through Plasma Inductively Coupled Plasme Mass Spectrometer for fine fraction, < 0,63 mm in 22 samples. The sample preparation for analysis had been make in the laboratories of geology of the UFRN. This samples procedures consists in register, dry, bolt and send to analysis in external laboratory (LAKEFIELD GEOSOL) in Belo Horizonte (MG, Brazil). The studied area involves the rivers Trairi, Arar? and N?sia Floresta lagoon, that empties in the sea, situated in the Rio Grande do Norte State. The study objects (Rivers Trair?, Arar? and N?sia Floresta lagoon) receive influences from urban dumpies, agrotoxics and fertilizer, shrimps tank, pastoral, with this, the concentrations of metals (Al, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, P, Zn) (except phosforus) in some points of the study area had been above of the value of reference what it leads to classify them as not polluted to moderately polluted, as the calculated Igeo. In front of discussed, can say about the environmental problems found in Trairi, Arar? and N?sia Floresta Lagoon are still in small scale, since when regard the studied ?rea is over human activity effects / Foram determinadas as concentra??es dos metais (Al, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn ) e do fosf?ro (P) analisadas atrav?s de Espectr?metro de Massa com Plasma Indutivamente Acoplado para fra??o fina, < 0,063 mm, em 22 amostras. A prepara??o das amostras para an?lise foi realizada nos Laborat?rios de Geologia da UFRN e consistiu em cadastrar, secar, peneirar e enviar para an?lise em laborat?rio externo (LAKEFIELD GEOSOL), em Belo Horizonte (MG). A ?rea estudada corresponde aos rios Tra?ri, Arar? e lagoa N?sia Floresta, que des?guam no mar, situados no Estado do Rio Grande do Norte. Os objetos de estudo (Rios Trair?, Arar? e lagoa N?sia Floresta) recebem influ?ncias de lixos urbano, agrot?xicos e adubos, viveiros de camar?es e pastoril; com isto, as concentra??es destes metais em alguns pontos da ?rea de estudo ficaram acima do valor de refer?ncia classificando-os como n?o polu?dos a moderadamente polu?dos, conforme o Igeo calculado. Diante dos dados obtidos conclui-se que os problemas ambientais encontrados nos rios Tra?ri, Arar? e lagoa N?sia Floresta s?o ainda de pequena escala, mesmo quando se considera que na ?rea estudada a atividade humana ? intensa