Chlorella Pyrenoidosa and Modification of Its Hydrochar Derivatives to Treat Heavy Metal Contaminated Wastewater
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Chemistry
Date of Award
9-1-2026
Abstract
Chlorella pyrenoidosa has shown a high affinity for removal of copper and cadmium ions in freshwater solutions. Utilizing an adsorption process known as biosorption, the physical and chemical adsorption methods of binding, deposition, ion exchange, and electrostatic interactions that cause the biological materials to collect metal ions on their surface. By incorporating a high-temperature and pressurized depolymerization process known as hydrothermal carbonization, a hydrochar is produced that holds potential to have a removal effectiveness for metal similar to its original biomass. Comparative analysis of C. pyrenoidosa compared to its hydrochar produced at 200 °C and 220 °C has shown a lower removal effectiveness for copper and cadmium compared to the original biomass at simulated metal concentrations above 2 ppm, with 220 °C hydrochar demonstrating a greater removal of both metals than 200 °C hydrochar. For both the biomass and hydrochars, presence of Cu (II) ions with Cd (II) ions during biosorption led to a significant decrease in metal uptake for cadmium. Characterization indicated a conversion of volatile materials to carbon ash as HTC temperature rose, alterations in FTIR peak signals, and a significant change in morphology to the surface of the material.
Advisor
Ben Jang
Subject Categories
Chemistry | Physical Sciences and Mathematics
Recommended Citation
Smith, Noah Benjamin, "Chlorella Pyrenoidosa and Modification of Its Hydrochar Derivatives to Treat Heavy Metal Contaminated Wastewater" (2026). Electronic Theses & Dissertations. 1391.
https://lair.etamu.edu/etd/1391
