Adsorption of lead (II) ions from semiconductor wastewater using waste green tea (Camellia sinensis) leaves as adsorbent

Date

4-2012

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Dhan Lord B. Fortela

Committee Member

Catalino G. Alfafara, Michel Vincent O. Laurio

Abstract

The feasibility of using waste tea leaves as an adsorbent for removing lead ions from actual wastewater was investigated in this study. the equilibrium time of adsorption was observed and the effects of adsorbent dosage and pH on lead removal were subsequently evaluated from the residual lead concentrations obtained. Results showed that at a constant initial pH of 1.0 and at varying adsorbent dosage of 0.50g and 1.00g, there was no significant lead removal and the residual concentrations did not meet the DENR standard for the maximum allowable concentration of lead in wastewaters. As the pH was increased to 4.0 and 7.0, using a constant adsorbent dosage of 0.50g,the percent removal of lead also increased. The maximum lead removal achieved was approximately 100% using 0.50 g tea waste adsorbent, wastewater pH adjusted to 7.0 and shaking time of 100 minutes. Also, using 0.50 g tea waste adsorbent and wastewater at pH 7.0. the DENR standard for lead in effluents was met at minimum shaking of 50 minutes. From the experimental data, it was found that wastewater lead and tea leaves adsorption system was fitted to the Langmuir isotherm (R² =0.9212).

Language

English

Location

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

Call Number

Thesis

Document Type

Thesis

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