Photocatalytic Hydrogen Production from Urine Using Sr-Doped TiO2 Photocatalyst with Subsequent Phosphorus Recovery via Struvite Crystallization

Catalysts

Patiya Kemacheevakul¹  Surawut Chuangchote²  Oranoot Sittipunsakda³  Navadol Laosiripojana³ 

[1]Department of Environmental Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Bangkok 10140, Thailand

[2]Research Center of Advanced Materials for Energy and Environmental Technology (MEET), King Mongkut′s University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Bangkok 10140, Thailand

[3]The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Bangkok 10140, Thailand

关键词: hydrogen energy;    wastewater;    hydrogen production;    struvite crystallization;    human urine;   

DOI  :  10.3390/catal11081012

来源: DOAJ

【 摘 要 】

Currently, the discharge of wastewater and utilization of phosphorus (P) in human activities cause some environmental problems, such as high organic pollutants in aquatic environments which results in dirty water sources, and a shortage of phosphate rock reserves due to the high demand of P. Therefore, fuel energy and struvite crystallization from waste sources can be considered interesting alternatives. In this work, the modified catalyst for hydrogen production, along with solving environmental problems, was examined. The strontium (Sr) doped-titanium dioxide (TiO₂) nanoparticles were synthesized by wetness impregnation method. The synthesized catalyst was characterized using UV-vis spectroscopy (UV-vis), photoluminescence (PL), X-ray diffraction (XRD), photoluminescence (PL), and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS). The Sr-doped TiO₂ catalysts had been utilized as the photocatalyst for the hydrogen production from synthetic human urine (a representative of waste source). The doping content of Sr in TiO₂ varied from 0.5, 1, 2, and 4%, and the photocatalytic performances were compared with pristine TiO₂ nanoparticles. The results showed that 1% Sr-doped TiO₂ had the highest photocatalytic activity for hydrogen production and decreased the amount of chemical oxygen demand (COD) in the synthetic human urine. Subsequently, P could be recovered from the treated human urine in the form of struvite.

【 授权许可】

Unknown