Remoção de Chumbo de Meios Líquidos Através de Adsorção ...

ABSTRACT
The lead contaminated water was treated with adsorvents of vegetable origin as babassu
activated carbon, wood activated carbon, wastes of processes and activated carbon with
modified surface with sulfur. Under the tested conditions, the obtained reductions were
attractive, except the modified surface with sulfur activated carbon. The Langmuir and
Freundlich models were tested and realized that the precipitation of lead occurs at pH near
to 6, influencing the implementation of these isotherms. Granular activated carbon can be
applied in water treatment using downward flow columns showing the capacity of
removing 22.97 mg Pb / g with rate 6.29 m 3 /m 2 h. Powdered activated carbon and wood
waste was tested on battery plant effluent treatment. These materials can be used as
alternative materials to replace conventional chemical used for this purpose.
Keywords: lead, water, effluent, activated carbon, vegetable waste, adsorption.
XIII