Preparation and physicochemical characterization of dry and carbonized shells of Magayon and M. Orolfo varieties of pili (Canarium ovatum Engl.)

Date

4-2013

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Hidelisa P. Hernandez

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

Compositional analysis of dry and carbonized shells of Magayon and M. Orolfo varieties of Canarium ovatum Engl (pili) was conducted. Proximate analysis showed high fiber content with 70.65% for Magayon variety and 69.62% for M. Orolfo variety and low contents for moisture, ash, fat, and protein. Metal analysis using X-ray fluorescence showed high concentrations of Ca, K, Fe, and Zn, trace amounts of Ti, and ultratrace amounts of Mn, Sr, Pb, Cu, Zr, Mo, and Rb in both varieties. Activated carbons were produced with or without soaking in phosphoric acid then by heating at 400oC, 600oC, and 800oC. Increasing the carbonization temperature decreases the yield of carbon due to higher removal of volatile matter. Highest carbon yield were 49.70% at 400oC with 1:1H3PO4:precursor impregnation ratio for the Magayon variety and 70.24% at 400oC with 1:0.33H3PO4:precursor impregnation ratio for the M. Orolfo variety. The adsorption capacity of the carbon were analyzed using methylene blue through UV-Visible spectrophotometry. Methylene blue adsorption increased with increasing carbonization temperature. For Magayon variety, the activated carbon prepared with 1:0.33 precursor:H3PO4 impregnation ratio at 800oC had a maximum methylene blue number of 18.69 mg/g and surface area of 570.10 m2/g. For M. Orolfo variety, the activated carbon prepared with 1:0.25 precursor:H3PO4 impregnation ratio at 800oC had maximum methylene blue number of 17.87 mg/g and surface area of 545.03 m2/g. FT-IR analysis showed small differences between the untreated and the treated samples which indicated that chemical transformation would have taken place during the chemical treatment with phosphoric acid.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2013 C42 /S25

Document Type

Thesis

This document is currently not available here.

Share

COinS