Souza A M, Salviano A M, Melo J F B, Felix W P, Belém C S, Ramos P N
Laboratório de Aquicultura e Bioquímica, Universidade Federal do Vale do São Francisco - UNIVASF, Rodovia BR 407, Km 12, Lote 543, Distrito de Irrigação Senador Nilo Coelho, CEP 56300-990, Petrolina, PE, Brazil.
Laboratório de Solos, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Rodovia BR 428, Km 152, CEP 56302-970, Petrolina, PE, Brazil.
Braz J Biol. 2016 Oct-Dec;76(4):967-974. doi: 10.1590/1519-6984.05215. Epub 2016 May 6.
In this study we determined the concentration of metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in the water lower São Francisco River basin, to evaluate the influence of urbanization and industrialization on environmental changes in the water resource. All samples were analyzed using the IUPAC adapted method and processed in an atomic absorption spectrophotometer. The sampling stations located near the industrial areas were influenced by industrialization because they presented higher concentrations of Cd, Cr, Ni and Cu. The other sampled locations showed changes with regard the trace elements probably originating in the soil, like Fe, Zn and Pb. There was a gradual increase in the concentrations of metals, in general, in the period of highest rainfall of the hydrographic network. Overall, except for Zn and Mn, the trace elements exceeded the maximum allowed value established by national legislation (CONAMA). Lower São Francisco River basin has suffered interference from urbanization and industrialization, so awareness programs should be developed so as to control and lessen future problems.
在本研究中，我们测定了圣弗朗西斯科河下游流域水体中金属（镉、铬、铜、铁、锰、镍、铅和锌）的浓度，以评估城市化和工业化对水资源环境变化的影响。所有样品均采用国际纯粹与应用化学联合会（IUPAC）的适配方法进行分析，并在原子吸收分光光度计中进行处理。位于工业区附近的采样站受到工业化的影响，因为它们的镉、铬、镍和铜浓度较高。其他采样地点的微量元素含量出现了变化，这些变化可能源于土壤，如铁、锌和铅。总体而言，在水文网络降雨最多的时期，金属浓度逐渐升高。除锌和锰外，其他微量元素均超过了国家立法（国家环境委员会，CONAMA）规定的最大允许值。圣弗朗西斯科河下游流域受到了城市化和工业化的干扰，因此应制定宣传计划，以控制和减少未来的问题。
