RemoÃÃo de Sulfeto em uma estaÃÃo de tratamento de efluentes de nÃquel por oxidaÃÃo Ãmida

AUTOR(ES)

Valderice Pereira Alves

DATA DE PUBLICAÇÃO

2006

RESUMO

The waste treatment of electronics components industry that use nickel in your electrochemistry process consist in aplication phisical-chemical metods as precipitation and filtration. This industry of northeast region remove nickel by add sulphide in excess with total precipitation of metal. The oxidation process adoptee by industry for removing this sulphide remaining is compressed air, this process is not efficient for according enviroment parameters (1mg/L CONAMA 357/05). The present study analyse the sulphide oxidation based sample with 100mg/L using as oxidants: hydrogen peroxide, potassium permanganate, sodium hypochlorite and calcium hypochlorite. Realized a factorial planned 2Â for determination the best condition of oxidation. The variable studed were: concentration (%), pH and reaction time (min). The results were: 85% for calcium hypochlorite pH (6,5), concentration (3 min) and time (5 min); 76% for hydrogen peroxide pH (6,5), concentration (10%) and times (1 min); 91% for sodium hypochlorite pH (3,5), concentration (3%) and times (1 min) and 80% for potassium permanganate pH (3,5), concentration (3%) and times (5 min). The best performance was sodium hypochlorite

ASSUNTO(S)

sulphide efluentes chemical oxidation oxidaÃÃo quÃmica engenharia quimica sulfeto efluent.

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