Title

Phosphate reclamation from water using Douglas fir biochar Fe/Mg-LDH Composites

Advisor

Mlsna, Todd E.

Committee Member

Wipf, David O.

Committee Member

Emerson, Joseph P.

Date of Degree

8-1-2020

Original embargo terms

Complete embargo for 2 years||Complete embargo for 2 years||8/15/2022

Document Type

Graduate Thesis - Open Access

Major

Chemistry

Degree Name

Master of Science

College

College of Arts and Sciences

Department

Department of Chemistry

Abstract

Eutrophication, caused by phosphate, can be detrimental both for the aquatic environment and human health. This research aims to provide deep knowledge about the adsorption properties of low-cost Fe/Mg layered double hydroxide modified biochar (LDHBC) for removal of phosphate from aqueous solution. Firstly, Fe/Mg layered double hydroxide (LDH) was synthesized by mixing FeCl3 and MgCl2. 6H2O salts in water, followed by NaOH treatment (coprecipitation method). For LDHBC, FeCl3, and MgCl2. 6H2O salts were dissolved in water, and Douglas fir biochar was added to the salts mixture to make a slurry, followed by NaOH treatment. The surface chemistry and elemental composition of both adsorbents and phosphate-laden adsorbents were characterized using Elemental analysis, BET, PZC, TGA, DSC, XRD, SEM, and TEM. Adsorption ability of LDH and LDHBC was studied by pH effects, kinetics, and the highest capacity for the analyte.

URI

https://hdl.handle.net/11668/18037

Comments

Eutrophication||Soil contamination||phosphate reclamation||layered double hydroxide||biochar

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