Thesis
Zinc removal using biogenic iron oxides
Washington State University
Master of Science (MS), Washington State University
2009
Handle:
https://hdl.handle.net/2376/104951
Abstract
More stringent regulations coupled with increasing cost for popular sorbents has created a demand for new, cost effective sorption technologies to remove Zn from regulated surface waters. This research explored the capability of biogenic iron oxides to remove Zn utilizing batch equilibrium experiments. Biogenic iron oxide kinetics followed a pseudo-first order model reaching equilibrium after 24 hours with k = -0.0051 min-1 and R2 = 0.930. Langmuir and the Redlich Peterson sorption isotherms were most effective at modeling sorption. Langmuir R2 values varied between 0.860 and 0.972 with a mean value of 0.940 ± 0.031 (n=7). Redlich Peterson R values varied between 0.891 and 0.982 with a mean value of 0.948 ± 0.024 (n=7). Maximum sorption varied greatly between samples with values ranging between 0.89 to 20.81 mg Zn/g solids. Increasing the pH from 6.54 to 9.0 increased Zn removal four fold from 5.93 to 23.32 mg/g. Zn removal using biogenic iron oxides was comparable to other experiments that investigated natural and engineered sorbents. The use of biogenic iron oxides for agricultural or tertiary wetland treatment to "polish" waste streams is a potential application.
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Details
- Title
- Zinc removal using biogenic iron oxides
- Creators
- Thomas Russell Leake
- Contributors
- Jeremy A. Rentz (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525121301842
- Language
- English
- Resource Type
- Thesis