Dr. Matthew G. Siebecker

Assistant Professor Applied Environmental Soil Chemistry
Department of Plant and Soil Science
Texas Tech University

 

https://www.depts.ttu.edu/pss/faculty_pages/msiebecker.php

 

 

 

     

      Cynthia Jordan - MS (thesis) student

 

Cynthia is pursuing a master's degree in Plant and Soil Science with a concentration in Soil Science. She is co-advised by Drs. David Weindorf and Matthew Siebecker. During her time as the senior research technician, she advanced research initiatives to integrate multiple types of proximal sensors, such as portable X-ray fluorescence (PXRF), VisNIR, and the NixPro color sensor, into soil characterization. As a graduate student, Cynthia's research project involves soil visualization via core samples from southern Lamb County, TX, and northern Lubbock County, TX. The project's objectives include the collection of soil cores at variable spatial resolutions, acquirement of proximal sensor and traditional laboratory characterization, and development of a novel three-dimensional data visualization tool based upon soil core data (i.e., combining physical, chemical and color measurements). With the completion of this degree, Cynthia seeks to continue her studies in soil science to pursue a doctoral degree.

 

Katherine is a junior level undergraduate student in the College of Arts and Sciences working toward a bachelor's degree in Geoscience. She is a member of the Honors College and is an undergraduate research assistant under Dr. Siebecker. She began working in the Plant and Soil Sciences lab in January of 2021. Her academic interests include climate change, water management, and planetary geology.

Under the instruction of Dr. Siebecker, Katherine is working to better understand potassium fixation in newly formed minerals, particularly in West Texas soil. She is conducting adsorption experiments with varying concentrations and changing pH. She is utilizing the ICP-OES as well as techniques such as TEM, SEM, and XRD.

 

 

      Danira Garcia Gutierrez - Undergraduate

 

Danira is a second year undergraduate student in the College of Arts and Sciences. She is currently majoring in Biochemistry and minoring in both Biology and English. She is a member of the Honors College and an Undergraduate Research Scholar under the guidance of Dr. Siebecker. She began working in the Environmental Soil Chemistry Lab in the Spring of 2019. In the future, Danira hopes to enroll at the Texas Tech Health Sciences Center where she will study medicine.

With the direction of Dr. Siebecker, Danira is working on several projects. Her main study is on the mobility and speciation of arsenic in contaminated soils and sediments from northwestern Costa Rica. The soil and sediment samples have unusually high concentrations of the toxic, due to local water filtering techniques used to remove geogenic arsenic from drinking water. The focus of this project is to understand the effects of arsenic mobility in both urban and agricultural settings. She is conducting experiments using techniques such as Particle Size Analysis, X-ray diffraction, and scanning emission microscopy (SEM).

 

Thanh is a junior level undergraduate student. He majors in Chemical Engineering and minors in Bioengineering and Mathematics. He aims to pursue PhD and become a professor. Under the instruction of Dr. Siebecker, Thanh is working on potassium binding to soil and how minerals transform over time using different types of metal oxides and techniques such as: Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM). This study helps improve soil health and crops production.