Title :
Small-Scale Formation of Struvite by Electrochemical Deposition and Its Characterization
Author :
Wang Chong-chen ; Hao Xiao-di
Author_Institution :
Sch. of Environ. & Energy Eng., Beijing Univ. of Civil Eng. & Archit., Beijing, China
Abstract :
Precipitates with high content of struvite were harvested by electrochemical deposition method from an aqueous solution containing Mg2+, NH4+ and HnPO4 3-n ions. The generation of OH- via electrochemical reduction of dissolved oxygen increased the interfacial pH near cathode, resulting into the formation of struvite precipitates. The structure, the morphology, the composition and the thermal properties of the harvested precipitates were investigated by X-ray diffraction (XRD), micro-image analysis by high-resolution color digital camera, Infrared (IR) spectra, energy-dispersive spectrometry(EDS), element analysis (EA) and thermogravimetric analysis (TGA). Especially a new and novel calculation method was introduced to determine exactly the struvite content in the precipitates harvested by electrochemical deposition.
Keywords :
X-ray diffraction; ammonium compounds; electrochemistry; environmental engineering; infrared spectra; magnesium compounds; precipitation (physical chemistry); thermal analysis; wastewater; MgNH4PO4; X-ray diffraction; electrochemical deposition; electrochemical reduction; element analysis; energy dispersive spectrometry; high resolution color digital camera; infrared spectra; interfacial pH; microimage analysis; precipitates; struvite; thermogravimetric analysis; Cathodes; Civil engineering; Digital cameras; Image color analysis; Infrared spectra; Magnesium; Morphology; Power engineering and energy; X-ray diffraction; X-ray scattering;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163406
