Hybrid peroxi-coagulation/ozonation process for highly efficient removal of organic contaminants

Li, Shasha; Xie, Jinxin; Gu, Jinyu; Zhou, Minghua

doi:10.1016/j.cclet.2023.108204

Cited by 7 publications

(2 citation statements)

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“…It can not only degrade antibiotics but also effectively treat a wide range of other organic pollutants, such as pesticides and pharmaceutical compounds in water and soil . Ozonation stands out as a green and efficient technique with broad applicability and exceptional effectiveness in purifying the environment from low concentrations of various organic pollutants. , However, there are significant drawbacks to ozone-based approaches, involving the substantial energy consumption required for ozone generation and transportation. The system’s operation necessitates electricity usage and a supply of oxygen, rendering the overall process less cost-effective.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the above statements, improving the ozone stability in the aquatic environment and promoting rapid contact with target organic contaminants for the efficient reaction of ozone molecules or their derived reactive oxygen species (ROS) is one of the key factors in this pathway. − Traditionally, ozone exhibits a relatively short half-life of 20–30 min in water . However, introducing ozone in the form of micronano bubbles (MNBs) into sewage largely prolongs its residence time in this environment.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Tetracycline Removal Efficiency through Ozone Micro–Nano Bubbles: Environmental Implication and Degradation Pathway

Zhao,

Padervand,

Ren

et al. 2024

ACS EST Eng.

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Developing green and efficient advanced oxidation technologies is crucial for removing antibiotics from contaminated water environments. Herein, we employed ozone oxidation to eliminate tetracycline from the water. It was found that ozone micronano bubbles, with a diameter of 0.2−60 μm, exhibited remarkable effectiveness, removing approximately 90% of tetracycline (10 mM) within a mere 20 min. This efficiency was 2.2 times higher than that achieved by larger ozone bubbles with diameters ranging from 0.5 to 4.5 mm. Notably, the ozone micronano bubbles demonstrated a consistent (85%) tetracycline removal rate across a wide pH range (3−11) and in the presence of anions. This remarkable ability to resist environmental interference can be attributed to the high mass transfer efficiency of ozone during the reaction and the production of a large number of reactive oxygen species (ROS). This discovery has been validated through electron paramagnetic resonance (EPR). Furthermore, high-performance liquid chromatography−mass spectrometry (HPLC−MS) spectrum analysis unveiled the tetracycline degradation pathway. In terms of environmental safety, toxicity assessments indicated that most of the resulting byproducts exhibited low toxicity. This work underscores the promising potential of ozone micronano bubbles as an environmentally friendly approach for removing antibiotic contamination from aquatic environment.

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Section: Introductionmentioning

confidence: 99%