Foods
·
2022
·Vol. 11
·期 7
·903
·
IF 5.561
Mei-Hui Pian,Lu Dong,Zhen-Ting Yu,Fan Wei,Chun-Yang Li,Dan-Cai Fan,Shi-Jie Li,Yan Zhang,Shuo Wang
This study aimed to compare ozone-microbubble-washing (OM) performed by domestic equipment with conventional water-washing (CW) regarding resultant quality attributes of muscle foods. For this purpose, muscle microstructure and lipid and protein oxidation were evaluated in pork and fish samples after OM and CW treatments. The assessment of muscle microstructure showed that OM treatment did not damage the microstructure of muscle fibers in both pork and fish samples. Thiobarbituric acid reactive substances (TBARS) values were not detected in both treatment groups, and they were substantially below the generally acceptable threshold (1 mg MDA/kg). The methylglyoxal (MGO) level of OM-treated fish samples was significantly higher than that of CW-treated fish samples. However, glyoxal (GO) and MGO levels of OM-treated pork samples were significantly lower than that of CW-treated pork samples. Similar types and sites of oxidative modification and similar numbers of modified peptides, as well as no significant difference in the concentration of total and most of the free amino acids (FAA) between treatment groups, indicated that OM treatment did not accelerate protein oxidation.Keywords:ozone-microbubbles-washing;ozone;domestic ozone equipment;washing treatment;pork;fish;oxidation
研究领域:
食品科学
·
肌肉生物学
·
氧化应激
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2019
·Vol. 45
·期 10
·4757-4778
·
IF 2.064
Jiang Longxin,Wang Chunrong,Chen Xiaoya,Liu Dan,Zhang Qi,Wang Xingmin,Li Haiyan,Sun Moxin
Nitrogenous heterocyclic compounds (NHCs) pose a serious threat to human health and ecosystems, and ozonation has been widely applied in the efficient removal of NHCs in water environments. In the present study, the degradation performance of indole in aqueous solutions was investigated. The second-order rate constants of indole reacting with molecular ozone at pH 2 and ·OH at pH 9 were determined to be 223.24 M −1 s −1 and 12.3 × 10 9 M −1 s −1 , respectively. The effect of different operating parameters both on the mass transfer and chemical kinetics was evaluated during the degradation of indole by ozonation. To attain a better removal performance, a pH value around 9 and a temperature of 35.6 °C were preferred. Additionally, the higher initial ozone concentrations were proved to be beneficial for the enhancement of the removal rate. Compared with synthetic solutions, the removal of indole appeared to be more efficient in real bio-treated coal gasification wastewater. A chemical kinetic model was built based on the rate constants and exposures of O 3 and ·OH, and experimental results demonstrated that the removal rates can be satisfactorily predicted. The relative contributions of O 3 and ·OH measured by the modeling results indicated that the molecular ozone played a dominant role in the reaction system. By further analysis of intermediates with gas chromatography–mass spectrometry (GC–MS), a number of products were detected, and three degradation pathways were tentatively proposed. This work provides a reference for kinetic studies on the treatment of other NHCs using ozone technologies.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2020
·
IF 4.982
Zheng Lian,Lina Guo,Shule Zhang,Yongheng Xiong,Fanyu Meng,Yiqing Zeng,Qin Zhong
Excess O 3 is invariably used to ensure the effective oxidation of NO in the industrial simultaneous desulfurization and denitration through combined ozone oxidation and absorbent scrubbing. O 3 is difficult to fully react with NO considering the short residence time of flue gas , remaining O 3 transport into the subsequent absorption device, and even its escape into the atmosphere. To study the influence of excess O 3 on NO 2 absorption in sulfite solution, we simulated an integrative process of pre-oxidation and post-absorption. NO 2 removal efficiency was improved from 36.1% to 66.5% as the mole ratio of O 3 /NO increased from 1.0 to 1.6. Additionally, the effects of temperature, pH, and reactant concentration with the remaining O 3 on NO 2 removal were evaluated. After 5 h of steady absorption, the concentration of total N species in the adsorbent was 82.8 mmol/L at a O 3 /NO mole ratio = 1.6. However, this concentration was only 51.4 mmol/L at a O 3 /NO mole ratio = 1.0, indicating that more NO 2 was absorbed, and the gas-liquid transfer of NO 2 was enhanced by the excess O 3 via oxidizing NO 2 − into NO 3 − . This work contributes to re-utilizing remaining O 3 and reducing O 3 escape in simultaneous desulfurization and denitration technology.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Zizheng Huangfu,Wei Ju,Yunhan Jia,Ruijun Ren,Zhenbei Wang,Chen Li,Xiaomeng Shang,Yujie Li,Hongnan Liu,Yu Wang,Hao Zheng,Fei Qi,Amir Ikhlaq,Jolanta Kumirska,Ewa Maria Siedlecka
Catalytic ozonation is an effective wastewater purification process. However, the low ozone mass transfer in packed bubble columns leads to low ozone utilization efficiency (OUE), poor organic degradation performance, and high energy consumption. Therefore, there is an urgent need to develop efficient supported catalysts that can enhance mass transfer and performance. However, the reaction mechanism of the support on ozone mass transfer remains unclear, which hinders the development of catalytic ozonation applications. In this study, lava rocks (LR)-supported catalysts, specifically CuMn 2 O 4 @LR and MnO 2 Co 3 O 4 @LR, were proposed for catalytic ozonation of IBP degradation due to their superior catalytic activity, stability, and high OUE. Addition of CuMn 2 O 4 @LR or MnO 2 Co 3 O 4 @LR increased IBP removal efficiency from 85% to 91% or 88%, and reduced energy consumption from 2.86 kWh/m 3 to 2.14 kWh/m 3 or 2.60 kWh/m 3 , respectively. This improvement was attributed to LR-supported catalysts enhancing mass transfer and promoting O 3 decomposition to generate •OH and •O 2 − , leading to IBP degradation. Furthermore, this study investigated the effects of ozone dose, supporter sizes, and catalyst components on ozone-liquid mass transfer. The results revealed that the size of the supporter influenced stacked porosity and consequently affected ozone mass transfer. Larger-sized LR (kLa= 0.172 min −1 ) exhibited better mass transfer compared to smaller-sized supports. Based on these findings, it was concluded that both CuMn 2 O 4 @LR and MnO 2 Co 3 O 4 @LR are potential catalysts for catalytic ozonation in residual IBP degradation of pharmaceutical wastewater, and LR showed good credibility as a catalyst supporter. Understanding the effects of supporters and active components on ozone mass transfer provides a fundamental principle for designing supported catalysts in catalytic ozonation applications.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2019
·
IF 3.173
Senlin Ma,Xingtao Zuo,Juan Xiong,Cong Ma,Zhongbing Chen
An ozonation process combined with hydrophobic adsorbent high silica ZSM-5 (HSZSM-5) was designed to enhance sulfamethoxazole (SMX) removal and reduce the ozone consumption. The promoted effect of HSZSM-5 on SMX removal was investigated in terms of SMX removal and TOC removal efficiency as well as the ozone consumption. The impacts of pH and CO 3 2− /HCO 3 - were also analyzed. The presence of HSZSM-5 helped to increase the SMX degradation and TOC removal efficiency and their kinetics rate constants. HSZSM-5 adsorption behaviors for SMX and its degradation intermediates were responsible for the findings. Direct ozone oxidation was the main mechanism of SMX removal as HZSM-5 could not contribute to producing H 2 O 2 and •OH. Much higher CO 3 2− /HCO 3 - concentration (≥10 mM) and pH value (>7) were in favor of SMX degradation. HSZSM-5 had a positive contribution to SMX removal. The mass ratio of ozone consumption to the removed SMX reduced to 0.63 g O 3 /g SMX. This system of introducing high silica zeolite in the ozonation/adsorption process is an environmentally and economically sound technology to removal micropollutants.
研究领域:
环境科学
·
水处理技术
✓ 已验证
DOI
高影响因子
ACS ES&T Engineering
·
2022
·
IF 0
Jingfei Long,Yang Guo,Gang Yu,Sridhar Komarneni,Yujue Wang
Adding catalysts can usually substantially enhance pollutant removal during laboratory semi-batch ozonation experiments with continuous ozone gas bubbling. However, it is unclear whether the enhanced pollutant abatement is mainly caused by the higher •OH yields (moles of •OH formed per mole of O3 consumed) or the higher O3 utilization efficiency in the presence of the catalysts─two effects that can or cannot be effectively transferred to large-scale applications, respectively. To distinguish these two effects during the laboratory experiments, this study compared oxalate removal by conventional ozonation (in the absence of catalysts) and catalytic ozonation with three carbon nanotube catalysts based on the consumed O3 doses during the different processes. In addition, the results of several previous studies that had evaluated varying catalysts (e.g., NiCo2O4, MnFe2O4, and MnO2) for pollutant removal by catalytic ozonation were revisited based on the consumed O3 doses measured in these studies. The results show that while all the catalysts considerably accelerated O3 transfer/consumption and pollutant removal during catalytic ozonation than during conventional ozonation, many of them did not enhance the extent of pollutant removal when the same O3 doses were consumed during the two processes. This finding suggests that in the laboratory experiments, these catalysts only enhanced the O3 utilization efficiency but did not significantly enhance the •OH yield from O3 decomposition during catalytic ozonation relative to conventional ozonation. Therefore, they may not be able to enhance pollutant removal during large-scale applications to the same extent as has been shown in the laboratory experiments. These results indicate that to more realistically predict the performance of catalysts for large-scale applications, the extent of pollutant removal should be evaluated based on the transferred/consumed O3 doses during the laboratory experiments.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Menglan Gao,Zhibin Jiang,Xiaobin Liao,Xingji Bai,Huan Qi,Jing Zou,Wei Cao
Unsymmetrical dimethylhydrazine (UDMH) is found to generate substantial carcinogenic nitroso-dimethylamine (NDMA) during ozonation , moreover, its formation is promoted by ubiquitous bromide ions (Br − ) in water matrixes, but the mechanism is still unclear. In this study, effects of Br − on NDMA formation during ozonation of UDMH were studied, meanwhile, its promotion pathways were also determined. The results demonstrated that Br − promoted NDMA formation from UDMH during ozonation, the formation rate constant with Br − is over 7 times of that without Br − . NDMA amount raised from 142.5 to 327.5 μg/L when Br − dosages increased from 0 to 100 μM. No matter with or without Br − , the augment of O 3 dosages facilitated NDMA formation; the maximum value was achieved at pH 8. NDMA decreased dramatically from 173.8 to 123.5 μg/L with HCO 3 − raising from 0 to 160 μM, while increasing remarkably to 222.5 μg/L with SO 4 2− dosing. In addition, NOM inhibited NDMA formation from UDMH during ozonation. The mass spectrum of LC-MS/MS verified that the generation of Br-UDMH was main cause for promoting NDMA formation. Moreover, hypobromous acid (HBrO) was confirmed to be responsible for Br-UDMH formation. In addition, the position that oxidants and Br − attacked was demonstrated based on Gaussian calculation. The results of this study could provide theoretical basis for the application of ozonation in bromine-containing water matrixes.
研究领域:
环境科学
·
毒理学
·
化学工程
✓ 已验证
DOI
高影响因子
Minerals
·
2018
·Vol. 8
·期 11
·477
·
IF 1.835
Pingfeng Fu,Xiaofeng Lin,Gen Li,Zihao Chen,Hua Peng
Ozonation at a high O3dosage can achieve high efficiencies in removing flotation reagents but it has a low ozone-utilization rate. The ozonation of potentially toxic thiol collectors (potassium ethyl xanthate (EX), sodium diethyl dithiocarbamate (SN-9),O-isopropyl-N-ethyl thionocarbamate (Z-200) and dianilino dithiophoshoric acid (DDA)) was investigated in an ozone-bubbled reactor at a low O3dosage of 1.125 mg/(min·L). The degradation kinetics, mineralization, ozone utilization, changes of biodegradability, and water quality parameters were studied, and the degradation behaviors of four collectors were compared. Thiol collectors could be effectively degraded with a removal ratio of >90% and a mineralization ratio of 10–27%, at a low O3dosage. The ozonation of thiol collectors followed the pseudo first-order kinetics, and rate constants had the order ofkSN-9>kEX>kZ-200>kDDA. The Z-200 and DDA were the refractory flotation reagents treated in the ozonation process. After ozonation, the biodegradability of EX, SN-9, and DDA solutions was remarkably raised, but the biodegradability of Z-200 only increased from 0.088 to 0.15, indicating that the Z-200 and its intermediates were biologically persistent organics. After ozonation, the solution pH decreased from 10.0 to 8.0–9.0, and both the conductivity and oxidation-reduction potential increased. The ozone utilization ratio in decomposing thiol collectors was above 98.41%, revealing almost complete usage of input O3. The results revealed that thiol collectors could be effectively degraded by O3, even at a low dosage, but their degradation behaviors were quite different, due to intrinsic molecular properties.Keywords:thiol collectors;flotation effluents;ozone;mineralization;biodegradability;ozone utilization;water quality parameters
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Dacheng Sun,Yonglei Wang,Baosen Liu,Xinglin Wang,Mengchang Hu
A laboratory-scale study was conducted to investigate the degradation of Geosmin (GSM) utilizing an ozone micro-nano bubble system. The primary objectives of this research encompassed: (1) assessing the comprehensive characteristics of the ozone micro-nano bubble system, (2) evaluating the removal of GSM in water samples using the micro-nano bubble system, and (3) identifying the degradation pathways and primary intermediate products generated by GSM during the degradation process. The ozone micro-nano bubble system was compared with the conventional ozone bubble system in terms of initial particle size distribution, liquid phase ozone concentration, free radical generation efficiency, as well as ozone absorption and utilization rates. Furthermore, the elucidation of the degradation pathways for GSM was achieved through rigorous analysis of intermediate product formation. The comprehensive performance of the ozone micro-nano bubble system is better than that of the ozone traditional bubble system. The ozone absorption rate reached 95 % and the ozone utilization rate reached 91.25 % under the ozone micro-nano bubble system. It is worth noting that in pure water, the GSM removal rate of the micro-nano bubble system is 97.11 %. All in all, the ozone micro-nano bubble system can significantly enhance the utilization rate of ozone and improve the removal effect of pollutants. However, there are still some defects in the stability of the bubble particle size produced by the ozone micro-nano bubble system, which poses the next challenge we need to face.
研究领域:
环境科学
·
水处理工程
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Yizhen Cheng,Xiaoyu Zhu,Pengwei Yan,Binyuan Wang,Jing Kang,Jimin Shen,Qiang Tan,Xinwei Zhu,Tianhao She,Jinxiang Zuo,Shengxin Zhao,Zhonglin Chen
Novel zero-valent iron (ZVI) and zero-valent zinc (ZVZ) bimetal-supported biochar (ZF@BC) was developed for heterogeneous catalytic ozonation (HCO), which demonstrated the unique dual synergistic adsorption and catalysis-induced effective O 3 triggering and interfacial decontamination. ZF@BC exhibited impressive catalytic and structure stabilities for 2-methyl-4-chlorophenoxyacetic acid (MCPA) degradation during long-lasting HCO, which can resist interference from a complex water quality background. Abundant electron-rich oxygen-containing functional groups and defects on BC contributed to the adsorption of MCPA and O 3 , respectively, while the introduced ZVZ was anticipated to expedite O 3 decomposition by facilitating single-electron transfer reduction of O 2 and establishing a robust connection with ZVI. Continuous efficacy of bimetal in three stages enhanced the efficiency of O 3 utilization and hydroxyl radicals ( • OH) yield, thereby safely mitigating the associated toxicity of MCPA after treatment. The development of O 3 /ZF@BC introduced a sustainable, long-term decontamination strategy and provided valuable insights for the advancement of HCO.
研究领域:
环境科学
·
水处理
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Qizhou Dai,Wei Chen,Jinming Luo,Xubiao Luo
In this work, we investigated the abatement of highly concentrated 1H-Benzotriazole (BTA) in aqueous solution by ozonation. Focusing on the COD removal and BTA degradation, the effects of different operational factors were explored, including different initial BTA concentrations (100–1000 mg/L), ozone dosages (16–48 mg/min) and initial pH values (3–11). It was found that the degradation of BTA was obviously affected by the initial concentration of BTA, pH value and O 3 dosage. And the optimized pH value was observed at 11. The increasing of ozone dosage and the pH value would accelerate the degradation efficiency of BTA and COD removal, while the increasing of initial BTA concentration would hamper this process. Based on the effects of ozone dosage, initial BTA concentration and initial pH value, a kinetic model was established with the function of C = C 0 exp(−8.68Q O3 2.4997 C 0 −2.1262 [OH − ] 0.0444 t).
研究领域:
环境科学
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Tian Tian,Peixin Zhu,Chun He,Ya Xiong,Jingyun Fang,Shuanghong Tian
As initial and important reactive species, surface O 3 complexes are rarely investigated in catalytic ozonation, which might be one cause of dispute in mechanistic understanding. Herein, In-situ DRIFTS and premixing-standing experiments confirmed the generation of long-lived Mn-O 3 * complexes upon O 3 adsorption on surface Lewis acid sites of α-MnO 2 . In α-MnO 2 /O 3 system, the oxidation rate of various pollutants showed a good linear correlation with their redox potentials, as well as the energy gap between the pollutants and Mn-O 3 * complexes. Joint catalytic mechanism experiments and density functional theory calculations revealed that the oxidation of pollutants was boosted mainly because there was fast nonradical intermolecular electron transfer from the HOMO of pollutants to the LUMO of Mn-O 3 * complexes. This study illustrates the significance of surface Mn-O 3 * complex in catalytic ozonation and discloses an efficient nonradical catalytic ozonation process that is resistant to pH fluctuation and matrix interference.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）