Removal efficiency of phenol by ozonation process with calcium peroxide from aqueous solutions

Honarmandrad, Zhila; Javid, Neda; Malakootian, Mohammad

doi:10.1007/s13201-020-01344-7

Cited by 23 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reaction between ozone and metals is essentially a redox reaction (reduction-oxidation). Ozone can decompose to hydroxyl radical OH − and superoxide O 2 − , while the former is a strong oxidant to react with various substances [ 53 , 54 ]. The literature presented that magnesium, manganese, and iron are able to react with ozone effectively, as shown in ( 5 ) [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Jiang

Wen

2022

PLoS ONE

View full text Add to dashboard Cite

Managing indoor ozone levels is important because ozone is a hazardous pollutant that has adverse effects on human health. Coffee is a popular daily beverage, and thus, coffee beans and spent coffee grounds are common in many places such as offices, homes, aircraft, cafeterias, and such. The most common material used to remove ozone is activated carbon which can be made from coffee beans or spent coffee grounds with proper activation processes. This paper presents a novel idea: to remove ozone at the level of an indoor environment using unactivated coffee products. This paper examines the ozone removal efficiency and the ozone deposition velocity at 130 ppb ozone for two types of coffee: solid coffee (powder) and liquid coffee (beverage). The activated carbon, the deionized water, and the seawater are also included for comparison and validation purposes. The tests show that the fine coffee powder has a removal efficiency of 58.5% and a deposition velocity of 0.62 cm/s. The liquid coffee has a removal efficiency of 34.4% and a deposition velocity of 0.23 cm/s. The chemical inspections indicate that the oxidation reactions with the carbohydrates in solid coffee and the metal/mineral elements in liquid coffee are responsible for ozone removal. These results have confirmed that ozone removal via coffee is effective, controlling indoor air quality by coffee products is thus becoming possible.

show abstract

Section: Resultsmentioning

confidence: 99%

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Jiang

Wen

2022

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Metal peroxides (MO 2 ), such as CaO 2 , CuO 2 , MgO 2 , BaO 2 , and ZnO 2 , are considered high-quality sources of hydrogen peroxide. Composed of peroxy groups and metal ions, MO 2 can generate H 2 O 2 in acidic conditions as well as slowly release O 2 under water or heating conditions. , These characteristics have made them widely applied in a variety of fields, including antibacterial applications, agricultural production, and environmental protection . MO 2 has recently come under increased scrutiny for its potential to be utilized in tumor nanotherapeutics, thanks to its ability to be decomposed in an acidic tumor microenvironment, releasing metal ions and H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Self-Supplying of Hydrogen Peroxide/Oxygen Based on CaO₂-Co₃O₄ Cascade Nanoreactors for Cellular Microenvironment Regulation

Zhu

Liu

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Monitoring and regulating levels of hydrogen peroxide and oxygen in cells can provide valuable information for cancer diagnosis, treatment, and development. However, it remains a significant challenge. In this study, a new nanocomposite (CaO 2 -Co 3 O 4 @HA) was developed by combining CaO 2 nanoparticles and Co 3 O 4 nanopolyhedrons and functionalization with hyaluronic acid (HA). The resulting nanoreactor can dynamically regulate contents of hydrogen peroxide and oxygen in cells. Due to the presence of HA, the synthesized CaO 2 -Co 3 O 4 @HA has good biocompatibility and active targeting ability. The CaO 2 nanoparticles produce enough H 2 O 2 in a slightly acidic (pH 6.5) environment, while the Co 3 O 4 nanopolyhedrons with good catalase (CAT) mimic activity can effectively catalyze H 2 O 2 into O 2 . The CaO 2 -Co 3 O 4 @HA then acted as a cascade nanoreactor for the self-supplying of hydrogen peroxide/ oxygen. The process was monitored using H 2 O 2 and O 2 fluorescence probes and confirmed by fluorescence spectra and fluorescence confocal microscopy. This study not only verifies that the nanoreactor has a high ability to self-supply H 2 O 2 and catalyze the generation of oxygen via the metal oxides under slightly acidic conditions but also provides a new way to regulate the contents of oxygen and hydrogen peroxide in cells. The tandem nanoreactor may have potential implications for cancer diagnosis and treatment through the regulation of reactive oxygen species in the cellular microenvironment.

show abstract

“…Phenol is highly toxic, chemically stable, and appreciably soluble in water. Phenols have their presence in the effluent from major chemical and pharmaceutical industries such as petrochemical industries, petroleum refineries, coal gasification operations, liquefaction process, resin manufacturing industries, dye synthesis units, pulp and paper mills, and pharmaceutical industries (Honarmandrad et al., 2021). Phenol is a highly corrosive and nerve poisoning agent.…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from aqueous environments by natural & chemically modified kaolin clay

Abdel‐Aleem

Abdel‐Tawab

Hassouna

2022

Environmental Quality Mgmt

View full text Add to dashboard Cite

Natural, acid and base modified kaolin clays were studied for the sake of phenol and 4-chlorophenol removal from aqueous environments and their application to real ground and industrial wastewater samples. Scanning electron microscope (SEM), infrared spectroscopy (IR), X-ray diffraction (XRD), Thermo Gravimetric Analysis (TGA), Differential Thermal Analysis (DTA), and Surface area analysis were employed for characterization of the adsorbents microstructure. Operating factors such as adsorbent dose, solution pH, initial phenol concentration, and contact time were studied. The experimental data displayed that the increase of the adsorbent dose, contact time, and pH value from 2 to 7 increases the efficiency of the removal process. Optimal conditions for phenolic removal were; contact time of 300 min, primary phenol solution of 25 mg/L, pH 7 and 2.5 g/L as an appropriate adsorbent dose using crude (natural), acid modified and base modified kaolin clays. The higher phenolic removal efficiencies were obtained at 5 mg/L as 90, 97, 96.2%, respectively, for the adsorbents in the previously mentioned order. The adsorption capacity in the removal of phenol and 4-chlorophenol were 7. 481 and 4.195, 8.2942 and 3.211, and 8.05185 and 18.565 mg/g, respectively, for the adsorbents in the same mentioned order. The adsorption equilibrium data were fitted and analyzed with four isotherm models, namely, Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm equations.The adsorption process of phenol on studied adsorbents was exothermic, spontaneous and thermodynamically favorable proved by the negative values of their thermodynamic parameters ΔH • and ΔG • . The correlation coefficient (R 2 ) for all concentrations was higher than 0.94, which indicates that in the studied system, the data suitably fit the first-order kinetics. The % desorption capacity was amounted to 96%, 91.11%, and 87.06% of adsorbed phenol, respectively, for the adsorbents in the previous order using 0.1N NaOH and 10% V/V ethanol solutions as eluents at 25 • C, indicating the reusability of the adsorbents. Kaolin and its modified forms can be introduced as eco-friendly and low-cost adsorbents in water remediation implementation.

show abstract

Removal efficiency of phenol by ozonation process with calcium peroxide from aqueous solutions

Cited by 23 publications

References 27 publications

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Self-Supplying of Hydrogen Peroxide/Oxygen Based on CaO₂-Co₃O₄ Cascade Nanoreactors for Cellular Microenvironment Regulation

Phenol removal from aqueous environments by natural & chemically modified kaolin clay

Contact Info

Product

Resources

About

Removal efficiency of phenol by ozonation process with calcium peroxide from aqueous solutions

Cited by 23 publications

References 27 publications

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Indoor ozone removal and deposition using unactivated solid and liquid coffee

Self-Supplying of Hydrogen Peroxide/Oxygen Based on CaO2-Co3O4 Cascade Nanoreactors for Cellular Microenvironment Regulation

Phenol removal from aqueous environments by natural & chemically modified kaolin clay

Contact Info

Product

Resources

About

Self-Supplying of Hydrogen Peroxide/Oxygen Based on CaO₂-Co₃O₄ Cascade Nanoreactors for Cellular Microenvironment Regulation