Photodecomposition of humic acid and natural organic matter in swamp water using a TiO2-coated ceramic foam filter: Potential for the formation of disinfection byproducts

Mori, Miwako; Sugita, Tsuyoshi; Mase, Akinori; Funatogawa, Takahiro; Kikuchi, Masaru; Aizawa, Kazuhiko; Kato, Shigekazu; Saito, Yoichi; Ito, Tsukasa; Itabashi, Hideyuki

doi:10.1016/j.chemosphere.2012.07.056

Cited by 21 publications

(10 citation statements)

References 37 publications

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“…Owing to their solubility, HA are common water contaminants, hence procedures for their removal from water have been extensively investigated [5,6]. e most common and economically feasible process is considered to be coagulation/flocculation with iron, aluminum, or calcium ions, followed by precipitation [7].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Removal of Humic Acids from Water Using Aluminum Anode: Influence of Chloride Ion and Current Parameters

Capasso

Salvestrini

Roviello

et al. 2019

Journal of Chemistry

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The removal by electrochemical treatment in batch of humic acids (HA) extracted from leonardite has been analyzed using aluminum electrodes at 25°C and neutral pH, under galvanostatic conditions. HA removal, inferred from UV-Vis spectra and total organic carbon determination, occurred within few minutes of treatment under the experimental conditions tested, and no electrode passivation was observed. The removal rate increased with NaCl concentration and electric current density. Our data indicate that energy consumption per unit weight of HA removed can be significantly reduced by operating at low current density under galvanostatic conditions and/or high salt concentration, thus confirming electrochemical treatment as a powerful technology for wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Removal of Humic Acids from Water Using Aluminum Anode: Influence of Chloride Ion and Current Parameters

Capasso

Salvestrini

Roviello

et al. 2019

Journal of Chemistry

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“…As a representative compound of DOM, humic acid (HA) had been widely used to evaluate the effect of natural organic matter on the environmental geochemical processes [35]. HA was a major component of humic substances coming from the decomposition of plants and animal [36], and it belonged to a kind of chemically heterogeneous compound containing abundant functional groups such as phenolic, hydroxyl, and carboxyl. Some research showed that HA could be absorbed on the nanomaterials surface, and the functional groups of HA such as carboxylate and phenolic had a strong complexation effect probably affecting the photocatalytic performance of the nanomaterials [37].…”

Section: Effect Of Humic Acidmentioning

confidence: 99%

Synthesis and Photocatalytic Sterilization Performance of SA/TiO2

Cui-ling

et al. 2020

J Inorg Organomet Polym

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The photocatalyst sorbic acid (SA)/titanium dioxide (TiO 2) was successfully synthesized by sol-gel method and characterized. The composite exhibited regularly spherical particles with the size of 50 nm and the specific surface area of 90.3 m 2 g −1 , furthermore, it showed mesoporous structure and significantly improved dispersion. SA was grafted on TiO 2 surface by-COOTi and TiO 2 existed as pure anatase phase in the composite. The addition of SA made the band gap of TiO 2 increased from 3.03 to 3.35 eV, which indicting that the composite exhibited a strong response to the ultraviolet light. The optimum preparation parameters of the catalyst were as follows: n(Ti):n(SA) = 1:0.05, ethanol 60 mL, glacial acetic acid 40 mL, hydrothermal temperature 180 °C, hydrothermal time 12 h. The composite could reach the 4.31 log reduction of E. coli, with the optimum catalyst dosage of 0.7 g L −1 , irradiated by UV light for 60 min. SA/TiO 2 was an environmentally friendly, non-toxic and safe sterilized nanocomposite material appropriate for future bactericidal applications, providing a new way to effectively increase the dispersion of TiO 2 particles to achieve superior photocatalytic sterilization efficiency.

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“…To overcome those limitations, in terms of removing HA, many studies involving modified TiO 2 photocatalytic have been carried out with certain success. The comparison of using a modified TiO 2 photocatalyst for the removal of HA under various experimental conditions is compared in Table 1 [20,[51][52][53][54][55][56][57][58][59][60][61][62].…”

Section: Enhancement Of Ha Removal By the Modification Of Tio 2 Photomentioning

confidence: 99%

“…Due to its high surface area feature and high adsorption capacity, a suitable pore structure has proven the extensive exhaustive activated carbon as a supporter of TiO 2 photocatalytic. Additionally, Mori et al [53] investigated the photodecomposition of aqueous HA by a TiO 2 -coated ceramic foam filter (TCF) reactor. A remarkable result was given and high stability in consecutive operation cycles was also shown by the TCF reactor.…”

Section: Fixation Of Tio 2 Onto the Support Matrixmentioning

confidence: 99%

Removing Humic Acid from Aqueous Solution Using Titanium Dioxide: A Review

Tung¹,

Xu²,

Zhang³

et al. 2018

Pol. J. Environ. Stud.

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Natural organic matter (NOM) is defined as a complex matrix of organic materials present in all surface, ground, and soil waters [1]. The presence of NOM, mainly humic substances (HS) in surface waters, constitutes the main route for the absorbance of solar energy in aquatic systems through which a series of photophysical and photochemical processes occur. Humic acid (HA) accounts for a significant fraction of the HS.The presence of HA in aqueous solutions is not directly toxic but could lead to organic disinfectant by-products (DBPs), which are undesired and hazardous products in water treatment after disinfection [2][3]. Furthermore, the high HA concentration in drinking water has the potential for some serious diseases, such as stomach cancer [4][5]. Thus, the presence of HA can be the cause of many problems, and their removal from water is a priority task [6] and has been attempted in different ways. Several processes have been attempted to remove HA from water such as coagulation [7-9], electrocoagulation (EC) [4,[10][11][12][13][14][15], electro-oxidation (EO) [16], ion exchange [17], membrane filtration [18-20], activated carbon adsorption and advanced oxidation processes [21-29]. AbstractRecently, the photocatalytic degradation technique with titanium dioxide (TiO 2 ) has been widely applied for the degradation of humic acid (HA) from aqueous solution due to its ability to achieve complete mineralization of organic contaminants. Because TiO 2 is the most commonly used semiconductor photocatalyst, efforts on the modification of TiO 2 in order to improve catalyst efficiency were presented in this review manuscript. The key photoreactor operation parameters such as TiO 2 loading, pH, temperature, oxygen concentration, concentration and nature of HA, light wavelength, light intensity, the presence of inorganic ions and mechanistic pathway for pollutant removal, and the formation of the intermediates and their effects on the mineralization and disinfection of the photo-process were also assessed. Although we can see an increase in the number of papers that have been published in this area, further progress is needed to improve the understanding of the dynamic interactions between TiO 2 photocatalytic oxidation process and HA, as well as to suggest possible future developments in this promising field.

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Photodecomposition of humic acid and natural organic matter in swamp water using a TiO2-coated ceramic foam filter: Potential for the formation of disinfection byproducts

Cited by 21 publications

References 37 publications

Electrochemical Removal of Humic Acids from Water Using Aluminum Anode: Influence of Chloride Ion and Current Parameters

Electrochemical Removal of Humic Acids from Water Using Aluminum Anode: Influence of Chloride Ion and Current Parameters

Synthesis and Photocatalytic Sterilization Performance of SA/TiO2

Removing Humic Acid from Aqueous Solution Using Titanium Dioxide: A Review

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