Adsorption of sediment phosphorus by porous ceramic filter media coated with nano-titanium dioxide film

Zeng, Yi; He, Feng; Xia, Shibin; Kong, Lingwei; Xu, Dong; Wu, Zhenbin

doi:10.1016/j.ecoleng.2013.12.056

Cited by 31 publications

(5 citation statements)

References 37 publications

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“…Temperature is usually considered as an important factor for adsorption process 24 29 . The P adsorption from the sediment in West Lake by PCFM was studied at various temperatures ranging from 5 °C to 70 °C.…”

Section: Resultsmentioning

confidence: 99%

“…The new porous ceramic filter media (PCFM) developed by means of red mud as main raw material, has the characteristics of anticorrosion, heat-resistant, high mechanical strength, no secondary pollution, long service life, large specific surface, low cost and high adsorption capacity. As a kind of ecological environment material, it has more extensive spreading values and prospects for applying 24 . In the paper, we choose PCFM as physico-chemical adsorbent, and the removal effect of sediment P in all fractions with the combined technology of PCFM and submerged macrophytes was conducted in West Lake, Hangzhou, China.…”

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confidence: 99%

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In-situ Adsorption-Biological Combined Technology Treating Sediment Phosphorus in all Fractions

Zhang

Wang

et al. 2016

Sci Rep

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The removal efficiency of sediment phosphorus (P) in all fractions with in-situ adsorption-biological combined technology was studied in West Lake, Hangzhou, China. The removal amounts of sediment Ca-P, Fe/Al-P, IP, OP and TP by the combined effect of PCFM (Porous ceramic filter media) and V. spiralis was 61 mg/kg, 249 mg/kg, 318 mg/kg, 85 mg/kg and 416 mg/kg, respectively, and the corresponding removing rate reached 10.5%, 44.6%, 27.5%, 30.6% and 29.2%. This study suggested that the combination of PCFM and V. spiralis could achieve a synergetic sediment P removal because the removal rates of the combinations were higher than the sum of that of PCFM and macrophytes used separately. From analysis of sediment microbial community and predicted function, we found that the combined PCFM and V. spiralis enhanced the function of P metabolism by increasing specific genus that belong to phylum Firmicutes and Nitrospirae. Thus it can be seen the in-situ adsorption-biological combined technology could be further applied to treat internal P loading in eutrophic waters.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

In-situ Adsorption-Biological Combined Technology Treating Sediment Phosphorus in all Fractions

Zhang

Wang

et al. 2016

Sci Rep

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“…This has stimulated a continuous research on the subject. 11,12) Some studies reported very promising results that reduction of strength could be minimized by controlling size, size distribution, and shape of pores. 13,14) Another report claimed that a proper control of pore distribution can enhance resistance to mechanical damages.…”

Section: Introductionmentioning

confidence: 99%

Effect of Porous Substrate on the Strength of Asymmetric Structure

Kim¹,

Park²,

Kim³

et al. 2015

Journal of the Korean Ceramic Society

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In this study, we investigate the effect of porous Al 2 O 3 substrate on the strengths of asymmetric structures after we prepare such a structure consisting of a dense Li 2 ZrO 3 top layer and porous Al 2 O 3 substrate layer. The porosity and elastic modulus of the substrate layer are controlled by sintering temperature, which has three values of 1150, 1250 and 1350 o C. The porosity is controlled in the range of ~ 30-50 vol%, elastic modulus is ~80-120 GPa and elastic mismatch E s /E c is ~ 0.6-1.0. Indentation stressstrain curves are obtained and analyzed to evaluate the yield stress of the asymmetric structure by concentrated local loading of WC balls. Conventional flexural strengths are also obtained to evaluate the strength of the asymmetric structure. The results indicate that the local yield strength of the asymmetric structure has mid-values between the top and the substrate layer; however, the flexural strength of the asymmetric structure are mainly influenced by elastic modulus and strength of the substrate.

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“…Due to its high adsorption ability to organic contaminants corresponding with good quality photocatalytic efficiency, TiO 2 photocatalysts have been used in many types of reactor configurations, including circulating columns, fluidized beds, membrane reactors, and immobilized films [11]. By using many different techniques, TiO 2 can be immobilized on ceramic, glass, plastic, and polyvinyl chloride-coated fabrics [12][13]. To facilitate the practical application of the photocatalytic process, the finding out of a suitable carrier substrate for synthesizing and immobilizing crystalline TiO 2 is required.…”

Section: •-mentioning

confidence: 99%

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

Tung¹,

Xu²,

Zhang³

et al. 2018

Pol. J. Environ. Stud.

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Humic substances are among the most important natural organic matters (NOM) existing in ground and surface waters and are known as one of the main disinfection by-product (DBPs) precursors that may act as health risk factors [1]. Humic substances -mainly humic acids (HA), which constitute the major fraction of NOM in water supplies -have been suggested as a standard for mimicking NOM in the laboratory. HA are non-biodegradable and have color, odor, and also exhibit a wide range of distribution in molecular weight and Pol. J. Environ. Stud. Vol. 27, No. 6 (2018), 2765-2774 AbstractA photocatalyst comprised of strontium-doped TiO 2 coated on porous ceramic filter media (Sr-TiO 2 /PCFM) was prepared using the heat-treated process. The main objective of this study was to investigate the effects of catalyst dosage, initial HA concentrations, pH, and temperature on the adsorption and degradation of humic acid (HA) in a solution containing Sr-TiO 2 /PCFM under irradiation of UV light. Removal efficiency of 84.25% for HA was achieved under experimental conditions for a Sr-TiO 2 /PCFM dosage of 80 g at an initial concentration of 15 mg/L over a period of 8 h. Higher degradation was found for HA in the acidic environment and at higher operating temperatures. The rate of the adsorption reaction followed the pseudo second-order kinetics with the sorption isotherm well fitted to the Freundlich and Langmuir isotherm models. The oxidation rate constants of HA were evaluated by using pseudo first-order kinetics that can describe the photodegradation process. Furthermore, the photocatalytic stability of Sr-TiO 2 /PCFM was performed with 3 cycles reused. These findings suggest that the Sr-TiO 2 /PCFM was found to be an effective and promising approach to eliminating HA in water resources.

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Adsorption of sediment phosphorus by porous ceramic filter media coated with nano-titanium dioxide film

Cited by 31 publications

References 37 publications

In-situ Adsorption-Biological Combined Technology Treating Sediment Phosphorus in all Fractions

In-situ Adsorption-Biological Combined Technology Treating Sediment Phosphorus in all Fractions

Effect of Porous Substrate on the Strength of Asymmetric Structure

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

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