Biological efficacy and toxic effect of emergency water disinfection process based on advanced oxidation technology

Tian, Yiping; Yuan, Xiaoli; Xu, Shujing; Li, Rihong; Zhou, Xinying; Zhang, Zhitao

doi:10.1007/s10646-015-1559-9

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…The measurement of each chroma value was performed using a chroma instrument (CN60M/SD9011, Qiangdao Westmid Technology Co. Ltd., Qingdao, China) subsequent to centrifugation of each solution at 10,200× g for 10 min. Before measurements, the instrument was calibrated with platinum-cobaltic standard solutions at chroma values of 0, 50, 100, 250, and 500 [53]. The chroma value of 1 was defined as the color produced when there were 2 mg of hexaaquacobalt (IV) chloride hexahydrate and 1 mg of platinum (in the form of hexachloroplatinic (IV) acid) in each solution.…”

Section: Determination Of Removal Ratio Of Rbb Kn-rmentioning

confidence: 99%

Role of Alkyl Chain Length in Surfactant-Induced Precipitation of Reactive Brilliant Blue KN-R

Liu,

Chang,

et al. 2024

Molecules

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To develop a cost-effective method for the effective removal of reactive brilliant blue KN-R (RBB KN-R) from wastewater, we investigated the interactions between RBB KN-R and three cationic surfactants with different alkyl chain lengths, namely dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), and cetyltrimethylammonium bromide (CTAB). Employing a conductivity analysis, surface tension analysis, ultraviolet-visible spectrophotometry, and molecular dynamics simulation, we ascertained that RBB KN-R formed a 1:1 molar ratio dye–surfactant complex with each surfactant through electrostatic attraction. Notably, an augmentation in alkyl chain length correlated with increased binding strength between RBB KN-R and the surfactant. The resulting dye–surfactant complex exhibited heightened surface activity, enabling interactions through hydrophobic forces to generate dye–surfactant aggregates when the molar ratio was below 1:1. Within these mixed aggregates, self-assembly of RBB KN-R molecules occurred, leading to the formation of dye aggregates. Due to the improved hydrophobicity with increased alkyl chain length, TTAB and CTAB could encapsulate dye aggregates within the mixed aggregates, but DTAB could not. The RBB KN-R aggregates tended to distribute on the surface of the RBB KN-R-DTAB mixed aggregates, resulting in low stability. Thus, at a DTAB concentration lower than CMC, insoluble particles readily formed and separated from surfactant aggregates at an RBB KN-R and DTAB molar ratio of 1:4. Analyzing the RBB KN-R precipitate through scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) and measuring the DTAB concentration in the supernate revealed that, at this molar ratio, all RBB KN-R precipitated from the dye–surfactant mixed solution, with only 7.5 ± 0.5% of DTAB present in the precipitate. Furthermore, the removal ratio of RBB KN-R reached nearly 100% within a pH range of 1.0 to 9.0 and standing time of 6 h. The salt type and concentration did not significantly affect the precipitation process. Therefore, this simultaneous achievement of successful RBB KN-R removal and effective separation from DTAB underscores the efficacy of the proposed approach.

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Section: Determination Of Removal Ratio Of Rbb Kn-rmentioning

confidence: 99%

Role of Alkyl Chain Length in Surfactant-Induced Precipitation of Reactive Brilliant Blue KN-R

Liu,

Chang,

et al. 2024

Molecules

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“…These results indicate that rapid treatment of E. coli O157:H7 infection could serve to limit host metabolic impact and reduce overall host cell death. As for drinking water production, Tian et al (2015) reported an innovative and removable water treatment system for reducing waterborne pathogens, which consists of strong electric field discharge and hydrodynamic cavitation based on advanced oxidation technologies (AOT). The biological efficacy and toxicity effects of this AOT based system were evaluated during water disinfection treatments.…”

Section: Toxic Effect During Disinfection Processmentioning

confidence: 99%

Fate and toxic effects of environmental stressors: environmental control

Zhuang

Henry

et al. 2015

Ecotoxicology

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The potential for toxicants to harm organisms in the environment is influenced by the physicochemistry of the substances and their environmental behaviors and transformation within ecosystems. This special issue is composed of 20 papers that report on studies which have investigated the fate and toxicity of various toxicants including engineered nanoparticles, pharmaceuticals and personal care products, antibiotics, pathogens, heavy metals, and agricultural nutrients. The environmental transformations of these substances and how these processes affect their toxicity are emphasized. This paper highlights the important findings and perspectives of the selected papers in this special edition, with an aim of providing insights into full-scale evaluation on the toxicity of various contaminants that exist in ecosystems. General suggestions are provided for the future directions of toxicological research.

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“…In the field of environmental protection, DBD is used to obtain atmospheric non-equilibrium oxygen plasma to generate ozone based reactive oxygen species and combined with a certain treatment process, can decompose and kill pollutants and microorganisms. It mainly includes ship ballast water treatment [6], drinking water treatment [7,8], wastewater treatment [9], flue gas desulfurization and denitrification [10], etc.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor

LIU¹,

Yu²,

Cao³

et al. 2019

Plasma Sci. Technol.

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The oxygen plasma reactor based on dielectric barrier discharge principle can produce a high concentration of reactive oxygen species, which can cooperate with hydraulic cavitation gas-liquid mixer to realize the application of advanced oxidation technology in water treatment. In this technology, the work pressure of the oxygen plasma reactor is decreased by the vacuum suction effect generated in the snap-back section of the gas-liquid mixed container. In this paper, the characteristics of single micro-discharge at different pressures were investigated with the methods of discharge image, electrical characteristics and spectral diagnosis, in order to analyze the electrical characteristics and reactive oxygen species generation efficiency of oxygen plasma reactor at the pressure range from 60 kPa to 100 kPa. The study indicated that, when the pressure decreases, the duty ratio of ionization in the discharge gap and number of electrons with high energy increases, leading to a rise in reactive oxygen species production. When the oxygen reaches the maximum ionization, the concentration of reactive oxygen species is the highest. Then, the discharge intensity continues to increase, producing more heat, which will decompose the ozone and lower the production of reactive oxygen species. The oxygen plasma reactor has an optimum working pressure at different input powers, which makes the oxygen plasma reactor the most efficient in generating reactive oxygen species.

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Biological efficacy and toxic effect of emergency water disinfection process based on advanced oxidation technology

Cited by 10 publications

References 33 publications

Role of Alkyl Chain Length in Surfactant-Induced Precipitation of Reactive Brilliant Blue KN-R

Role of Alkyl Chain Length in Surfactant-Induced Precipitation of Reactive Brilliant Blue KN-R

Fate and toxic effects of environmental stressors: environmental control

Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor

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