Adsorption and desorption of lead (II) ions in calcium alginate extracted from Sargassum sp.
Date
10-2012
Degree
Bachelor of Science in Chemistry
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Kristel Mae M. Rabanzo
Committee Member
Mary Grace E. Guardian Ernesto J. Del Rosario
Restrictions
Restricted: Not available to the general public and to those bound by the confidentiality agreement. Access is available only after consultation with author/thesis adviser.
Abstract
The adsorption efficiency of calcium alginate was evaluated using Pb(II) ions. Results showed that the alginate sample was found to be most efficient in adsorbing Pb(II) ions at pH 5. It was also observed that the reaction reached equilibrium after 10mins. Potentiometric titration of the alginate sample showed that the mannuronic and guluronic acids were the groups responsible for the adsorption of the Pb(II) ions. This was further evidenced by the appearance of inflection point between pH 3.0-3.8 which includes the pK values of mannuronic and guluronic acids. FT-IR analysis revealed that the ?OH group as well as the carboxylate group of the mannuronic and guluropnic acid were directly involved in the adsorption of Pb(II) ions. Furthermore, flow-through column adsorption of Pb(II) ions into the alginate sample showed that as the flowrate decreases, the metal uptake increases. The optimum metal inlet flowrate was found to be 20ml/min. Using the optimum flowrate, adsorption efficiency of the alginate was determined using actual lead wastewater from used car battery. It was observed that the maximum metal uptake for the lead wastewater was 22.1 mg metal/g sample. Desorption process was also carried out and results showed that EDTA have higher percent desorption (16.20 ± 0.07) than calcium chloride solution (0.82 ± 0.59).
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
LG 993.5 2012 C4 R33
Recommended Citation
Remorosa, Valerie Fay Argamosa, "Adsorption and desorption of lead (II) ions in calcium alginate extracted from Sargassum sp." (2012). Undergraduate Theses. 1342.
https://www.ukdr.uplb.edu.ph/etd-undergrad/1342
Document Type
Thesis