Titanium dioxide sol–gel-coated expanded clay granules for use in photocatalytic fluidized-bed reactor

Pronina, Natalja; Klauson, Deniss; Moiseev, Anna; Deubener, Joachim; Krichevskaya, Marina

doi:10.1016/j.apcatb.2014.10.006

Cited by 29 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a moderately high catalyst load of 1.25 g/L, a low level of reduction in removal rates of methyl orange was observed for a glycerol scaffold-synthesised ZnO catalyst and somewhat higher reduction for TiO 2 -P25 [39]. Photocatalysts in the immobilised form are far less common in the literature, and many reports dealing with TiO 2 and ZnO immobilization do not report reuse efficiency of the immobilised photocatalyst [23,[40][41][42][43], despite reusability being one of the main advantages of immobilised HPC over suspension based one [43]. Lalhriatpuia et al [44] reported encouraging results of reusability of immobilised titania.…”

Section: Photocatalytic Degradation Of Antibioticsmentioning

confidence: 99%

Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria

et al. 2019

View full text Add to dashboard Cite

The threat of antibiotic resistance to the wellbeing of societies is well established. Urban wastewater treatment plants (UWTPs) are recognised sources for antibiotic resistance dissemination in the environment. Herein a novel cerium-doped zinc oxide (Ce-ZnO) photocatalyst is compared to ZnO and the benchmark TiO2-P25 in the immobilised form on a metallic support, to evaluate a photocatalytic process as a possible tertiary treatment in UWTPs. The catalysts were compared for the removal of two antibiotics, trimethoprim (TMP) and sulfamethoxazole (SMX), and for the inactivation of Escherichia coli (E. coli) strain DH5-Alpha in isotonic sodium chloride solution and of autochthonous bacteria in real secondary wastewater. In real wastewater, E. coli and other coliforms were monitored, as well as the respective fractions resistant to ofloxacin and azithromycin. In parallel, Pseudomonas aeruginosa and the respective sub-population resistant to ofloxacin or ciprofloxacin were also monitored. Photocatalysis with both ZnO and Ce-ZnO was faster than using TiO2-P25 at degrading the antibiotics, with Ce-ZnO the fastest against SMX but slower than undoped ZnO in the removal of TMP. Ce-ZnO catalyst reuse in the immobilised form produced somewhat slower kinetics maintained >50% of the initial activity, even after five cycles of use. Approximately 3 log10 inactivation of E. coli in isotonic sodium chloride water was recorded with reproducible results. In the removal of autochthonous bacteria in real wastewater, Ce-ZnO performed better (more than 2 log values higher) than TiO2-P25. In all cases, E. coli and other coliforms, including their resistant subpopulations, were inactivated at a higher rate than P. aeruginosa. With short reaction times no evidence for enrichment of resistance was observed, yet with extended reaction times low levels of bacterial loads were not further inactivated. Overall, Ce-ZnO is an easy and cheap photocatalyst to produce and immobilise and the one that showed higher activity than the industry standard TiO2-P25 against the tested antibiotics and bacteria, including antibiotic-resistant bacteria.

show abstract

Section: Photocatalytic Degradation Of Antibioticsmentioning

confidence: 99%

Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria

et al. 2019

View full text Add to dashboard Cite

show abstract

“…[13,14] Adsorption is recognized as one of the most effective ones among the proposed water treatment approaches, because of its simple operation, strong practicability and ease of popularizing. [15][16][17][18][19][20][21][22][23][24][25] In recent years, a variety of adsorbents based on synthetic materials have been widely studied. [26][27][28][29][30][31][32][33] It is generally accepted that reducing the cost is the key to realize the large-scale application of adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption is recognized as one of the most effective ones among the proposed water treatment approaches, because of its simple operation, strong practicability and ease of popularizing [15–25] . In recent years, a variety of adsorbents based on synthetic materials have been widely studied [26–33] .…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Optimization of 3D Nitrogen‐Doped Carbon Network via Biomass Waste for Highly Efficient Bisphenol S Adsorption

Zhao

Hong

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

In this paper, a 3D nitrogen-doped carbon network with excellent adsorption properties was prepared for bisphenol S (BPS) removal from water. An optimized sample B-T700-N3 with high Langmuir specific surface area as well as plentiful heteroatoms was screened out. Benefiting from the synergistic effect of conjugation and hydrogen bonding between the adsorbent and bisphenol S, B-T700-N3 demonstrated superior adsorption performance. The maximum adsorption amount (q max,e ) of the B-T700-N3 at equilibrium was determined to be up to 91 mg/g, which was comparable or even higher than that of the state-of-the-art reported adsorbents. Experimental results illustrated that this adsorbent could also effectively remove other bisphenols (BPA, BPAF) from water. Overall, this novel adsorbent demonstrated a competitive performance for bisphenols removal in aqueous solution and can be a highly interesting candidate for industrial applications.

show abstract

“…Alternatively the catalyst can be immobilized on an inert support (Borges et al, 2015), which promotes its stability along with recyclability. However, many studies have been reported in literature regarding the fixing of catalyst on support materials like ceramic paper (Vereb et al, 2014), glass plates, cemented slabs, alginate beads (Verma et al, 2014a), cement beads (Verma et al, 2014b), granular expanded clay (Pronina et al, 2015). Cost-effective inert supports and their durability for prolonged use is still an existing need.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous photo-Fenton and photocatalytic degradation studies of 2-chloro-4-nitrophenol (2Cl4NP) using foundry sand and TiO2 coated cement/clay beads

Aggarwal

Verma

Bansal

et al. 2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-Cement and clay beads coated with TiO 2 were used for the photo-degradation and mineralization of 2-chloro-4-nitrophenol (2Cl4NP) along with a heterogeneous solar photo-Fenton process using foundry sand (FS) as the iron source. The degradation process was optimized using slurry photocatalysis where 96% degradation of 2Cl4NP was achieved in 120 min at optimized conditions of C0=50 mgL -1 , pH=4, 0.75 gL -1 TiO 2 and H 2 O 2 = 0.1 mL/200 mL. Degradation of 2Cl4NP was analyzed through HPLC along with UV-Visible spectrophotometer at 266 nm. The degradation of 68% and 52% of 2Cl4NP was attained in fixed-bed photocatalysis using cement and clay beads, respectively. The durability studies of cement and clay beads were carried out in terms of number of recycles. 97.19% degradation was obtained in a solar photo-Fenton process after 105 min at pH=3. Complete mineralization of 2Cl4NP was confirmed through reduction in COD along with the disappearance of the parent compound peak in HPLC chromatograms.

show abstract

Titanium dioxide sol–gel-coated expanded clay granules for use in photocatalytic fluidized-bed reactor

Cited by 29 publications

References 25 publications

Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria

Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria

Green Synthesis and Optimization of 3D Nitrogen‐Doped Carbon Network via Biomass Waste for Highly Efficient Bisphenol S Adsorption

Heterogeneous photo-Fenton and photocatalytic degradation studies of 2-chloro-4-nitrophenol (2Cl4NP) using foundry sand and TiO2 coated cement/clay beads

Contact Info

Product

Resources

About