Date of Award

2021

Publisher

North Dakota State University

Document Type

Thesis

Degree Awarded

Master of Science (MS)

Program

Coatings and Polymeric Materials

Department

Coatings and Polymeric Materials

College

Science and Mathematics

Faculty Advisor

Quadir, Mohiuddin

Description

Pollution by heavy metals, such as lead (Pb), in bodies of water is a serious problem today that poses great risk to human health and the environment. In this study, cellulose-acetate (CA) based membranes were synthesized by immersion precipitation process, and commercially available CA membranes were modified by a layering method. Phytic acid (PA), a phosphorus rich compound known for its chelating properties, was doped into the membrane films to improve their efficiency in removing Pb (II) ions from water. As formulation additives, cellulose nanocrystals (CNCs), amine-functionalized cellulose nanofibers (CNFs) and chitosan were used. Mechanical properties, and filtration efficiency of the resulting membranes as a function of PA content, PA incorporation method, and additive types were assessed. Synthesized membrane films containing CNC, and chitosan/ PA coated membrane films showed up to 60% and 90% removal of Pb (II) ions respectively from water.

Rights

NDSU policy 190.6.2

Rights Link

https://www.ndsu.edu/fileadmin/policy/190.pdf

Handle Identifier

https://hdl.handle.net/10365/32466

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