Date

10-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Monet Concepcion C. Maguyon

Co-adviser

Veronica P. Migo

Committee Member

Marilyn C. Del Barrio, John Meynard M. Tengco, Butch G. Bataller

Abstract

The recovery of silver from gold smelting wastewater by electrodeposition was investigated as an alternative to (the more expensive, and more polluting) traditional copper-based recovery method. The effects of operating current and time on silver recovery were investigated from electrodeposition time-course plots. Secondary effects were also observed from temperature, and pH profiles. High silver removal rates and silver removal efficiencies were observed at increased operating currents. Electrodeposition at 9A operating current showed 98.67% silver recovery after 30 minutes. Increase in temperature and decrease in pH were observed during the operation. Charge dose for silver electrodeposition (a scale-up operating factor) was found to be approximately 1.24 Coulombs/ mg metal removed. The computed energy requirement was found to be in the range of 5.5x10-4 to 6.12x10-4 kWh/mg metal removed while the average energy cost was 120.82 PhP/m3 wastewater.

Language

English

LC Subject

Electrolyte, Sewage

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2009 E62 L38

Document Type

Thesis

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Included in

Engineering Commons

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