Evaluation of recycled silver and mercury for chemical oxygen demand tests on agro- industrial wastewaters

Date

5-1987

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Marlito L. Cardenas

Abstract

PARAYNO, DOLORES ALVIAR, University of the Philippines at Los Banos, Play, 1987. "Evaluation of Recycled Silver and Mercury for Chemical Oxygen Demand Test on Agro-Industrial Wastewaters."

Adviser: Dr. Marlito L. Cardenas

This study was conducted to explore the techno-economic feasibility of recycling silver and mercury in spent solutions from Chemical Oxygen Demand (COD) tests. Successful results of this study were expected to reduce cost and pollution load of COD tests. The initial concentrations of silver and mercury in COD wastewater at the UPLD institute of Chemistry are 845 and 1999, respectively.

Recovery of silver for a small scale experiment was 50%. For larger scale experiment, recovery of silver was 87%. For mercury, the optimum recovery was 46%.

The purity of the recovered reagents ranges from 75 to 89% for silver, the Main impurities being copper and mercury. Recovered mercury was 98-100% pure.'

The COD value of the various effluents using analytical reagent grade and recovered reagents are not significantly different from one another, thereby indicating reusability of Ag and Hg.

Recovered silver and mercury are 50% and 208 cheaper, respectively, than their analytical grade counterpart, so the cost of COD test along with wastewater pollution control can be reduced.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1987 C4 P37

Document Type

Thesis

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