Potential of Philippine sunflower variants for the phytoremediation of copper contaminated substrate
Date of Publication
6-2020
Document Type
Master's Thesis
Degree Name
Master of Science in Chemical Engineering
Subject Categories
Chemical Engineering
College
Gokongwei College of Engineering
Department/Unit
Chemical Engineering
Thesis Adviser
Lawrence P. Belo
Cynthia F. Madrazo
Defense Panel Chair
Arnel B. Beltran
Defense Panel Member
Vergel C. Bungay
Aileen H. Orbecido
Abstract/Summary
Phytoremediation is the process of using plants to remove, degrade, and stabilize contaminants in water and soil. In this study Sunflower (Helianthus annuus) is used for the phytoremediation of copper-contaminated soil since it is fast-growing and can accumulate heavy metals in soil. Three variants of Philippine Sunflower (F1 Vincent 2 Choice, F1 Vincent 2 Fresh, and Sunrich Orange) were evaluated for the phytoremediation of soil with 177.16 ppm Cu as Cu2+ . Among the three variants, F1 Vincent 2 Choice performed the best in terms of Cu uptake at 3574.22 mg Cu/kg dry biomass. It is also noteworthy that with higher Cu concentration and longer exposure time, more Cu is removed from the soil with Cu concentrations ranging 124.84 – 242.16 ppm. It can be observed that H. annuus is a good hyperaccumulator with a bioconcentration factor (BCF) after 3 weeks ranging from 6.7 – 10.2. Also, during the early stages more Cu was found to concentrate within the roots. However, with longer exposure time, Cu was observed to be translocated to the aerial parts, i.e. the shoots. The translocation factor (TF) after 3 weeks ranging from 0.17 – 0.23. The Cu concentration in the roots was always higher than that of the shoots. Interestingly, in the latter stages, the total amount of Cu in the shoots was always higher than that of the roots due to the amount of biomass. The Cu uptake kinetics of H. annuus was evaluated and it was found out that it best fits with an n=0.7 order model with an average R2 value of 0.967 with a rate constant, k, of 0.0475-0.0491 mg0.3 -kg-0.3 -wk-1 .
Abstract Format
html
Language
English
Format
Electronic
Keywords
Phytoremediation; Sunflowers—Philippines; Soils—Copper content; Soil pollution
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Recommended Citation
Poral, N. J. (2020). Potential of Philippine sunflower variants for the phytoremediation of copper contaminated substrate. Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/5917
Embargo Period
4-10-2022