Nuñez, Nadine Royce T. <br/><br/>
Phytoremediation potential of spreading dayflower (commelina diffusa) for lead contamination in soil along the zapote riverbanks, bacoor city, cavite/ 
Nadine Royce T. Nuñez, Yvonne P. Pallino, Jon Rhuzzel S. Paura, and Jeverson T. Rosario.-- 
 - Manila:  Technological University of the Philippines,  2025. 
 - x, 117pages:  29cm. 
<br/><br/> Bachelor's thesis 
<br/><br/>College of Science.-- 
<br/><br/>Includes bibliographic references and index. 
<br/><br/> Lead (Pb) contamination in soil presents a significant environmental and public health<br/>concern, particularly in urban riverbank areas exposed to industrial and domestic waste.<br/>This study analyzed the phytoremediation potential of spreading dayflower (Commelina<br/>diffusa) in lead-contaminated soils, specifically focusing on the Zapote Riverbanks in<br/>Bacoor City, Cavite. The study aimed to evaluate the plant’s growth response under<br/>varying lead concentrations, quantify its lead uptake capacity using bioconcentration factor<br/>(BCF), bioaccumulation factor (BAF), and translocation factor (TF), and validate its<br/>effectiveness in naturally contaminated soil. A two-month pot experiment was conducted<br/>under a control (0 ppm), lead treatment setups (5 ppm 12.5 ppm, and 25 ppm), alongside<br/>an uncontrolled setup using Zapote soil (12.5 ppm). Weekly growth indicators including<br/>stem width, plant height, leaf discoloration, and number of leaves were monitored. Lead<br/>concentrations in roots and shoots were analyzed by Atomic Absorption Spectroscopy<br/>(AAS). Statistical analyses were performed using correlation analysis and Kruskal-Wallis<br/>tests. Results showed that increasing Pb concentrations negatively affected plant width and<br/>height, with 25 ppm exhibiting the most growth inhibition. However, C. diffusa maintained<br/>growth at 12.5 ppm and in Zapote soil, showing resilience under moderate contamination.<br/>The highest BCF (1.22) and BAF (1.13) were observed at 12.5 ppm, with a TF close to 1,<br/>indicating optimal phytoextraction performance. At 25 ppm and in Zapote soil, lead was<br/>retained mostly in roots (TF < 1), suggesting a shift toward phytostabilization. The study<br/>concludes that C. diffusa demonstrates dual remediation capacity, phytoextraction at<br/>moderate Pb levels and phytostabilization at higher or natural contamination levels, making<br/><br/>it a viable, low-cost, and ecologically sustainable candidate for in-situ remediation of lead-<br/>contaminated riverbank soils. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phytoremediation<br/>Lead (pb) contamination <br/>Commelina diffusa
<br/><br/><label>LC Class. No.: </label>BTH GF 41  / N86 2025