Suchergebnisse

A industrialização e urbanização têm produzido vários rejeitos que muitas vezes são despejados em áreas baixas sem tratamento adequado e sem engenharia de controle. O distrito de Bangalore tem mais de 60 lixões ilegais resultantes de rejeitos industriais ou municipais. Registros do governo apontam mais de 1.500 indústrias instaladas em diversos setores industriais e outros locais em torno da cidade. No presente estudo foi feita uma tentativa de caracterização do lixão da área industrial de Bommasandra, localizada no sul de Bangalore. Esse local de entulho tem de 15 a 20 anos e ocupa uma área de 12,7 acres. Cerca de 60 a 70 indústrias de diversas naturezas se localizam ao redor desse local de entulho. Um grande número de amostras de solo foi coletado para a caracterização do local e, após o conhecimento das propriedades do solo, foi feita uma tentativa de previsão do comportamento do transporte das espécies químicas selecionadas com base em modelos matemáticos disponíveis e em um aplicativo com base no MATLAB – 7 para modelar o processo de migração dessas espécies em função do tempo. Também um modelo disponibilizado pela USEPA DRASTIC foi usado. O Índice DRASTIC calculado para esse lixão foi 146; portanto, pode-se concluir que esse local de entulho é moderadamente vulnerável a poluentes. O comportamento de migração de cátions como sódio, cálcio e anions como sulfato, cloreto foi analisado. Foi observado que os cátions são mais retardados quando comparados aos anions. Isto foi atribuído às reações químicas desses elementos. ; Industrialization and urbanization has produced various types of wastes that sometimes are dumped in low-lying areas without proper treatment and engineering controls. Bangalore district has more than 60 illegal dumpsites consisting of either municipal or industrial waste. Government records indicate that more than 1,500 industries are working at various industrial areas and other locations around the city. In the present study an attempt has been made to characterize the Bommasandra industrial area dump site located at the south of Bangalore. This dump site is 15 to 20 years old and spreads on an area of 12.7 acres. Around 60 to 70 industries of all nature are located around this dump site. A large number of soil samples were collected and after site characterization of soil properties, an attempt has been made to predict the transport behavior of selected chemical species using available mathematical models and a program based on MATLAB- 7 to study the migration properties of these selected chemical species as a function of time. Also a model provided by USEPA DRASTIC has been used. The DRASTIC Index found for this dumpsite was 146; therefore, one can conclude that the studied dumpsite is moderately vulnerable to pollutants. The migrating behavior of cations such as sodium, calcium and anions such as sulphate, chloride were considered. It was observed that cations are better retarded in comparison to anions. This was attributed to exchangeable chemical reactions. ; Industrialization and urbanization has produced various types of wastes that sometimes are dumped in low-lying areas without proper treatment and engineering controls. Bangalore district has more than 60 illegal dumpsites consisting of either municipal or industrial waste. Government records indicate that more than 1,500 industries are working at various industrial areas and other locations around the city. In the present study an attempt has been made to characterize the Bommasandra industrial area dump site located at the south of Bangalore. This dump site is 15 to 20 years old and spreads on an area of 12.7 acres. Around 60 to 70 industries of all nature are located around this dump site. A large number of soil samples were collected and after site characterization of soil properties, an attempt has been made to predict the transport behavior of selected chemical species using available mathematical models and a program based on MATLAB- 7 to study the migration properties of these selected chemical species as a function of time. Also a model provided by USEPA DRASTIC has been used. The DRASTIC Index found for this dumpsite was 146; therefore, one can conclude that the studied dumpsite is moderately vulnerable to pollutants. The migrating behavior of cations such as sodium, calcium and anions such as sulphate, chloride were considered. It was observed that cations are better retarded in comparison to anions. This was attributed to exchangeable chemical reactions.