Developing an efficient TiO2-coated biofilm carrier for intimate coupling of photocatalysis and biodegradation

Li, Guozheng; Park, Seongjun; Rittmann, Bruce E.

doi:10.1016/j.watres.2012.09.029

Cited by 69 publications

(21 citation statements)

References 27 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the combined treatment, the photocatalysis partially transforms biorecalcitrant organic compounds into intermediates that can be fully mineralized by biodegradation further. However, the problems of sequential treatment can be optimized and downsized if the photocatalysis and biodegradation occur together; this is called intimate coupling [19]. Marsolek et al successfully demonstrates the concept of intimate coupling of photocatalysis and biodegradation (ICPB) for 2,4,5-TCP in a novel photocatalytic circulating-bed biofilm reactor (PCBBR) that exploits macro-porous cellulose carriers [20].…”

Section: Introductionmentioning

confidence: 99%

High thermostable ordered mesoporous SiO2–TiO2 coated circulating-bed biofilm reactor for unpredictable photocatalytic and biocatalytic performance

Zhang

Xing

Zhang

et al. 2016

Applied Catalysis B: Environmental

115

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

High thermostable ordered mesoporous SiO2–TiO2 coated circulating-bed biofilm reactor for unpredictable photocatalytic and biocatalytic performance

Zhang

Xing

Zhang

et al. 2016

Applied Catalysis B: Environmental

115

View full text Add to dashboard Cite

“…The fine TiO 2 powder, or crystals, can be dispersed in the water, in order to be clarified by irradiation; however, they must be removed by filtering after reaction, which is troublesome and costly. Thus, in order to solve this problem, many researchers have examined methods of fixing TiO 2 on other supporting materials, including glass beads [20][21][22], fiberglass [23][24][25], silica [26,27], an electrode [28], and zeolite [29,30]. Recently, some researchers have used zeolite as hosts to fix semiconductors, due to its unique, uniform pores and channel size.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Y from rice husk ash encapsulated with Ag-TiO2: characterization and applications for photocatalytic degradation catalysts

Mohamed

Mkhalid

Salam

et al. 2013

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TA high level of efficiency in the photocatalytic reactions was achieved by increasing the surface area of the photocatalyst by supporting fine TiO 2 particles on porous materials. Among various supports, zeolites seem to be an attractive candidate. Ti-incorporated Y zeolite was prepared by an ion-exchange method, while Ag was immobilized on the encapsulated titanium via impregnation method. The produced samples were characterized using X-ray diffraction, ultraviolet and visible spectroscopy, photoluminescence emission spectra, scanning electron microscopy, and surface area measurement. Furthermore, the catalytic performances of Ti-Ag/NaY tests were carried out for degradation of cyanide using visible light. The results reveal a good distribution of Ag on the zeolite. Ag doping can eliminate the recombination of electron-hole pairs in the catalyst. These results demonstrate that the optimum weight% of Ag to Ti-NaY is 0.3%; this weight% facilitates high performance by the photocatalyst, degrading 99% of cyanide in a 100 mg/L solution in 60 min.

show abstract

“…Another approach that has been tested in several studies (particularly for mineralizing chlorophenol) is to use systems consisting of microorganisms and photocatalysts adsorbed on a sponge. This format system had achieved remarkable results in phenolic wastewater under visible light [21, 28–30]. …”

Section: Introductionmentioning

confidence: 99%

Simultaneous photocatalytic and microbial degradation of dye-containing wastewater by a novel g-C3N4-P25/photosynthetic bacteria composite

Zhang

Xiao

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

Azo dyes are very resistant to light-induced fading and biodegradation. Existing advanced oxidative pre-treatment methods based on the generation of non-selective radicals cannot efficiently remove these dyes from wastewater streams, and post-treatment oxidative dye removal is problematic because it may leave many byproducts with unknown toxicity profiles in the outgoing water, or cause expensive complete mineralization. These problems could potentially be overcome by combining photocatalysis and biodegradation. A novel visible-light-responsive hybrid dye removal agent featuring both photocatalysts (g-C3N4-P25) and photosynthetic bacteria encapsulated in calcium alginate beads was prepared by self-assembly. This system achieved a removal efficiency of 94% for the dye reactive brilliant red X-3b and also reduced the COD of synthetic wastewater samples by 84.7%, successfully decolorized synthetic dye-contaminated wastewater and reduced its COD, demonstrating the advantages of combining photocatalysis and biocatalysis for wastewater purification. The composite apparently degrades X-3b by initially converting the dye into aniline and phenol derivatives whose aryl moieties are then attacked by free radicals to form alkyl derivatives, preventing the accumulation of aromatic hydrocarbons that might suppress microbial activity. These alkyl intermediates are finally degraded by the photosynthetic bacteria.

show abstract

Developing an efficient TiO2-coated biofilm carrier for intimate coupling of photocatalysis and biodegradation

Cited by 69 publications

References 27 publications

High thermostable ordered mesoporous SiO2–TiO2 coated circulating-bed biofilm reactor for unpredictable photocatalytic and biocatalytic performance

High thermostable ordered mesoporous SiO2–TiO2 coated circulating-bed biofilm reactor for unpredictable photocatalytic and biocatalytic performance

Zeolite Y from rice husk ash encapsulated with Ag-TiO2: characterization and applications for photocatalytic degradation catalysts

Simultaneous photocatalytic and microbial degradation of dye-containing wastewater by a novel g-C3N4-P25/photosynthetic bacteria composite

Contact Info

Product

Resources

About