Carlos Ernando da Silva

Diagnóstico dos resíduos de serviços de saúde no interior do Rio Grande do Sul

The paper aims to analyze and evaluate the medical wastes management in the cities of Vacacai river basin in the State of Rio Grande do Sul, Brazil. Health care facilities (hospitals, health centers and clinical laboratories) were surveyed to provide information about the management, segregation, generation, storage and disposal of medical wastes. The results about management aspects indicate that practices in most healthcare facilities do not comply with the principles stated in Brazilian legislation (CONAMA Resolution N. 283/2001). Average generation rate of total waste in the hospitals was estimated to be 3,245 kg/bed.day (17.6% from Group A). A total medical waste generated in the study area was estimated to be 182,640 kg/month (22.1% from Group A).

Aplicação de Fenton, foto-Fenton e UV/H2O2 no tratamento de efluente têxtil sintético contendo o corante Preto Biozol UC

Os efluentes texteis, geralmente, sao carregados de corantes nao biodegradaveis, o que dificulta o seu tratamento. Dentre as novas alternativas de tratamento estudadas, estao os Processos Oxidativos Avancados (POA). Os mesmos sao processos com potencial de produzir radicais hidroxila (•OH), especies altamente oxidantes, capazes de mineralizar a materia orgânica. Assim, o objetivo deste trabalho foi estudar a aplicacao dos POA (Fenton, foto-Fenton e UV/H2O2) no tratamento de efluente textil sintetico contendo o corante Preto Biozol UC. Dentre os processos estudados, o mais eficiente foi o foto-Fenton (H2O2 = 1.500 mg.L-1 e Fe2+ = 75 mg.L-1), em pH = 3, que obteve 95,4% e 73,0% para as remocoes de cor e demanda quimica de oxigenio (DQO), respectivamente.

Características gerais da composição química de mananciais da planície do Araguaia

This study aimed to investigate the general characteristics of the chemical composition of waters of the Araguaia floodplain, in this case ionic balance and classification of water bodies under study into general categories. The study was conducted on the Araguaia Plain (Tocantins). In each of the sources under study a collection point was placed where samples were taken for analysis of concentrations of major ions (Ca, Mg, Na, K, Cl, SO4, HCO3 ), dissolved organic carbon (COD) and dissolved inorganic carbon (CID). The interpretation of the data obtained showed that the values of the concentrations of most elements analyzed were statistically similar between the Javaés and Araguaia rivers during the rainy season. However, during the dry period, when there is no influence of bioleaching processes, the concentrations were statistically different. This behavior indicates that the terms of use and occupation developed in the area of influence of the river Javaés currently do not show changes in the studied region. It was also found that the biogeochemistry of lake Chave is significantly influenced by its connection with the seasonal river Javaés, which indicates that the occurrence of changes in the waters of this river may disturb the lentic environments of the region. Key-words: Araguaia floodplain, biogeochemistry, ionic

Diagnóstico ambiental do balneário Curva São Paulo no rio Poti em Teresina, Piauí

This study evaluated the environmental conditions of the Curva Sao Paulo bathing place, located in Poti river, at Teresina city, Piaui, Brazil. A monitoring program of water quality was carried out between June 2009 to October 2010, through the faecal coliform, turbidity, pH, and temperature. The results indicated that the place presented a satisfactory condition for bathing in 90% of the monitored period. This favorable scenario is due to the low level of urban occupation at the upstream of the resort. Restrictions on recreational use occur during the rainy season (December-May), which was attributed to diffuse pollution. In order to provide greater health security to the swimmers and encourage recreation in the study area, it is proposed to the establishment a monitoring program of balneability.