Date of Award
Fall 12-14-2019
Degree Type
Dissertation
Degree Name
Master of Science in Natural Science
Department
College of Science and Mathematics
First Advisor
Dr. Kefa K. Onchoke
Abstract
The influence of biosolids upon the uptake of Mn and Cd by radish (Raphanus sativus L.) was investigated through the characterization of biosolids, sequential extraction of the biosolids, and the determination of the metal content in the root, shoot and leaves of radish (Raphanus sativus L.).The biosolid samples from Nacogdoches Wastewater Sludge (NWWS), Lufkin Wastewater Sludge (LWWS), Soil Therapy Compost (STC) had pHs between 5.33 – 6.74. The elemental compositions of the biosolid samples were determined using inductively coupled plasma optical emission spectroscopy (ICP-OES) and SEM/EDX. Major elements (K, Mg, Mn, P) needed for plant growth were found in the biosolid samples while toxic elements Cd, Cr, As, Pb were determined below the USEPA maximum ceiling limit. The functional groups in the biosolids were determined using Fourier Transform Infrared (FTIR) spectroscopy. The FTIR spectra showed peaks at 3386, 2921, 1640, 1375, 1000, 695, 563 cm -1 attributed to -OH, C-H, C=O, C-N, C-F, C-Cl, and C-Br groups. A scanning electron microscope was used to determine the particle size of the biosolid. The biosolids have particle diameter in the range ~ 25 – 120 µm. X-ray diffraction analysis showed the existence of vermiculite, alunogen, and quartz in the biosolids. By using a modified Tessier sequential extraction protocol Mn and Cd were found bioavailable in biosolid samples. The accumulation of Mn and Cd concentrations in radish were in the order [Mn]leaves > [Mn]shoot > [Mn]root, and [Cd]root > [Cd]shoot > [Cd]leaf,respectively.
Repository Citation
Fateru, Oluwadamilola O., "Influence of Biosolids upon the uptake of Mn and Cd by Radish (Raphanus sativus L.)" (2019). Electronic Theses and Dissertations. 314.
https://scholarworks.sfasu.edu/etds/314
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
