ENVIRONMENTAL RESEARCH
·
2020
·
IF 5.715
Wei Qian,Hui Huang,Zenghui Diao,Huankai Li,Hui Liu,Maoyou Ye,Yili Deng,Zhimin Xu
The deposal of residual hydrogen peroxide (H 2 O 2 ) in Fenton-like system and the requirement of oxygen in bioreactor are essential parts for the treatment of integrative Fenton-like/bioreactor. A novel low-cost integrative Fenton-like and MnO 2 -filled upward flow biological filter bed (Fenton-like/MBFB) equipped with the modified ceramsite was constructed to evaluate the main properties and catalytic activity of modified ceramsite, and the optimal conditions of integrative system and compare integrative and traditional systems. In this study, the Fenton-like reactor with modified ceramsite had higher catalytic ability whose Acid Orange 7 (AO7) degradation efficiency reached to 79.3% due to large surface area and high porosity, compared with that with raw ceramsite (44.3%). Furthermore, total utilization efficiency of H 2 O 2 in integrative system (from 32.41% to 53.51%) and removal efficiencies of COD and AO7 were remarkably improved, which would effectively decrease the waste of H 2 O 2 and the setting of regulation pool and aeration tank. Thus, the integrative system can save 0.51 CNY/m 3 in construction cost and 0.21 CNY/m 3 in operating cost. The average COD removal efficiency, AO7 degradation efficiency and effluent DO concentration were achieved to 64.8%, 79.5% and 9.3 mg/L respectively in integrative system were achieved in integrative system during sixty successive runs. Also, the potential degradation pathway of contaminants was also proposed according to the OH-enhanced at Fenton-like reactor due to catalyst and adsorption of modified ceramsite and the removal of microorganisms and modified ceramsite for contaminants at MBFB. This study demonstrated the feasibility of integrative Fenton-like/MBFB filled with modified ceramsite for simultaneously decreasing operational cost and complexity and enhancing removal efficiency, thus provided a one-step alternative for refractory dye wastewater.
研究领域:
环境科学
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污水处理
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2024
·
IF 2.2
Tianju Zhu,Jiao Song,Xiaoling Zhou,Yuqin Liu
Composite flocculant PAFS-PDM was prepared from Polymeric aluminium ferric sulphate (PAFS) and Poly (diallyl dimethyl ammonium chloride) (PDM) in this study. A bacterium was selected from the soil near the shale gas exploitation platform as a bioflocculant-producing bacterium, and polysaccharide was extracted and combined with PAFS-PDM to obtain composite bioflocculant (CBF) to treat shale gas fracturing flowback fluid. The prepared CBF was characterized and the results showed that the prepared PAFS-PDM contained aluminium-iron hydroxyl polymer, which was a cationic flocculant. By measuring the turbidity removal rate and chemical oxygen demand (COD) removal efficiency, the function mechanism of CBF on the shale gas fracturing flowback fluid was discussed. The results showed that CBF had a stable treatment effect on fracturing flowback fluid when the pH value was about 7.0. With the increase of dosage, the coagulation efficiency increased first and then decreased. When the dosage of the CBF was 2500 mg·L−1, the treatment effect of shale gas fracturing flowback fluid was the best, and COD removal rate reached 89.43%. Through Zeta potential analysis, it was concluded that one of the coagulation mechanisms was electrical neutralization. According to the characterization results, it could be concluded that both adsorption bridging and charge neutralization mechanisms played important roles in the treatment of shale gas fracturing flowback fluids.
研究领域:
环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
Water
·
2025
·Vol. 17
·期 2
·179
·
IF 3
Wei Xu,Xiaoping Zhang,Guichang Zhang,Xin Zhang
The treatment of wastewater using microalgae is regarded as a green and potential technology. However, its engineering application has been largely hindered because of the limitation of microalgae separation and harvesting. Therefore, immobilization technology has been widely used to embed microalgae for wastewater treatment. In this paper, sodium alginate (SA) and polyvinyl alcohol (PVA) as the common immobilized carriers were used to immobilizeankistrodesmus falcatusfor simulated slaughtering wastewater (SSW) treatment. The experimental results of the mass transfer and adsorption of immobilized carriers were found to show that the mass transfer of SA-SiO2gel balls (SS-GB) was better than PVA-SA gel balls (PS-GB) and that the adsorption of PS-GB was better than SS-GB. When immobilizing microalgae with the two kinds of carriers, it was found that SA-SiO2microalgal spheres (SS-MS) were better than PVA-SA microalgal spheres (PS-MS) for the maintenance of microalgal cell activity and that PS-MS were better than SS-MS for the resistance to biodegradation. This is because the carrier of PS-MS had a thick shell and dense structure, while the carrier of SS-MS had a thin shell and loose structure. The results of SSW treatment by PS-MS and SS-MS were found to show that the total phosphorus (TP) removal rates of PS-MS and SS-MS were 90.31% and 86.60%, respectively. This indicates that the TP removal effect of PS-MS was superior to that of SS-MS. The adsorption kinetics simulation showed that the adsorption of TP onto PS-GB was controlled by chemisorption and that the adsorption of TP onto SS-GB was controlled by physical adsorption. The chemical oxygen demand (COD) and ammonium nitrogen (NH4+-N) removal of PS-MS were 9.30% and 10.70%, respectively, and the COD and NH4+-N removal of SS-MS were 54.60% and 62.08%, respectively. This indicates that the COD and NH4+-N removal effect of SS-MS were superior to PS-MS. This is the result of the combined action of the degradation by microalgal cells and adsorption by the carrier.
研究领域:
环境科学
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生物技术
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Qiaoji Tian,Li Hao,Qian Zhang,Huilin Huang,Chaoxin Tu,Chaozhong Fan,Hu Hou
A novel cod bone peptide GETGPA with high calcium chelating capacity (4.60 ± 1.06 μg/mg) was prepared and synthesized to elucidate the binding mechanism of peptide with Ca 2+ . The chelation sites, binding modes, and coordination bond formation mechanism were systematically investigated by experimental methods combined with molecular dynamics simulation and density functional theory calculation. FTIR and Raman spectra showed that the oxygen atoms of carboxyl groups were likely involved in the binding of GETGPA with Ca 2+ . Furthermore, mass spectrometry identified Glu-2 as the primary calcium binding site of GETGPA. NMR indicated that the free carboxyl group of Ala-6 and Glu-2 might be participated in Ca 2+ chelation. There were multiple chelating modes in the system where multiple GETGPA molecules coexisted with Ca 2+ . The coordination bond formed between GETGPA and Ca 2+ exhibited excellent chemical and thermodynamic stability. This study provided new insights into the binding mechanisms of peptides and calcium.
研究领域:
生物化学
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食品科学
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计算生物学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Xiaohan Zheng,Bowen Zou,Ruitao Zhu,Junwei Zhang,Xiaokang Na,Ming Du,Beiwei Zhu,Chao Wu
Structured binary protein networks offer a pathway for designing gel-based foods with less ecological and economic effects. This study investigated the heat-mediated interaction and gelation kinetics of cod-soy mixed proteins at molecular level. Results indicated that denaturation degree of soy proteins was fundamental in determining the protein-protein interactions during heating. Considerable non-natural β-sheet was generated in the heterogeneous structures to initiate their aggregation behavior. Cod actomyosin comprising myosin heavy chains and actin mainly regulated their aggregation below 70 °C. At higher temperatures, the formation of large-sized and intermediary-sized aggregates was dominated by disulfide bond exchange between cod actomyosin and soy A-B aggregates (≤ 85 °C) or dissociated B subunits (> 85 °C). These aggregates were further evidenced as essential components to form gel networks with higher storage modulus (G'). These findings provide fundamental insights for designing gel-based products with desirable nutritional and textural properties based on plant-animal binary proteins.
研究领域:
食品科学
·
分子生物学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Haizhou Wu,Shulan Xiao,Jie Yin,Jianhao Zhang,Mark P. Richards
The roles of lipid oxidation substrates and muscle microstructure in lipid oxidation were investigated in two muscle models (cod and pig). Added myoglobin (Mb) promoted lipid oxidation in washed cod muscle (WCM) but not in washed pig muscle (WPM). The differing microstructure of WCM e.g. more exposed fat cells or membrane of muscle cells compared to the “denseness” or “wrapped” structure of WPM, may have contributed to the better ability of Mb to facilitate lipid oxidation in the WCM. Added phospholipids with polyenoic indexes of 282 and 24 activated Mb as an oxidant similarly in WPM while added neutral lipids and added free fatty acids had little effect. It is suggested that muscle microstructure and accessibility of Mb to phospholipids play critical roles in relation to Mb-mediated lipid oxidation while the degree of unsaturation in the phospholipids was less important.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Jiaqian Yang,Jining Jia,Jiade Wang,Qingqing Zhou,Ruihao Zheng
An inverse computation machine learning (ML) framework that couples genetic algorithm (GA) to feedforward neural network was developed to optimize the operating parameters for maximizing electrochemical removal of chemical oxygen demand (COD) and total nitrogen (TN) from wastewater. Conventional neural networks (NN) are generally unable to implement inverse computation from a desired abatement to feasible input conditions, and NN trained from small-scale datasets tends to be unreliable for multivariate simulation. To address this issue, we employed GA for tuning the weights and biases of the network to enhance the stability and generalization performance of NN, the optimization of multiple operating conditions was performed by the GA strategy of iterative evolution and global search. In this work, we investigated and analyzed the performance of multivariate optimization approaches such as orthogonal design, response surface methodology (RSM), traditional NN, and the developed neuro-genetic model (GANN). Significance and error analysis demonstrate that GANN exhibits superior stability and generalization ability with the highest R 2 of 0.946 (COD), 0.874 (TN), and the lowest RMSE of 0.022 (COD), 0.028 (TN). The introduction of GA is significant for improving the prediction accuracy of NN derived from small-scale datasets. The average error of the GANN trained by 25 data points is lower than that of the RSM model derived from 54 data points. According to the validation outcomes, the scheme suggested by GANN achieves the best COD (93.6%) and TN (62.8%) degradation efficiencies, which are 6.1% and 9.9% higher than the optimal values in the original dataset, respectively. The proposed multivariate global optimization strategy can be extended to other cases, and the computational framework of GANN also contributes to the progress of more reliable ML models.
研究领域:
环境科学
·
机器学习
·
电化学工程
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DOI
高影响因子
Food Chemistry-X
·
2026
·
IF 9.2
Shengli Shi,Mengkai Li,Yiqing Wang,Dan Li,Tiantian Wang,Aiguo Luo,Hongmei Zhao,Xiaoli Ma,Yanjun Yang
Cod skin possesses a pronounced savoury flavour yet remains underutilised as a processing by product. As a potential source of umami peptides, cod skin holds significant development potential. This study employed gel permeation chromatography (GPC), ultrafiltration (UF), sensory evaluation, high–performance liquid chromatography tandem mass spectrometry (LC–MS/MS), and virtual screening to isolate, purify, screen, and identify potential umami peptides from cod skin enzymatic hydrolysate (EHCS). Five potential umami peptides: GDRGFPGER, SSGDQGPAG, SSGPFGE, LPGADDDKF, and GLPGADDKF were screened. Their interactions with T1R1/T1R3 receptors and the stability of peptide–receptor complexes were investigated via molecular docking and molecular dynamics simulations. Ultimately, GDRGFPGER was identified as a potent umami peptide, while SSGDQGPAG and SSGPFGE exhibited umami enhancing characteristics. This study provides a screening and identification methodology for extracting umami peptides from cod skin, elucidates the molecular perception mechanism of umami peptides, and establishes a theoretical foundation and technical support for developing natural umami enhancers.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Kaiyu Jiang,Wei Gong,Yu-Xuan Liang,Juncai Tu,Jinjin Li,Weiman Gao,Xiuping Dong,Beiwei Zhu
To investigate the effects of processing temperatures on α, β-unsaturated aldehyde-mediated modifications of cod protein, a clickable probe, 4-(2-Propyn-1-yloxy)-2-butenal (yne-ACR), was developed to simulate α, β-unsaturated aldehyde modifications on cod protein in simulated processing systems (25 °C, 90 °C, and 180 °C). Processing at 180 °C resulted in a 3-fold increase in the hydrophobicity, while modifications under thermal processing had limited effects on the content of free nucleophilic amino acids. However, modification at 180 °C significantly increased the content of carbonylated proteins to 14.7 nmol/mg protein. Cod protein modified during thermal processing (90 °C and 180 °C) exhibited superior emulsifying and foaming properties than those subjected to heating alone. Cod protein processed at 90 °C exhibited 757 identified modified components, representing the highest number among the three processing temperatures, and thermally induced structural changes in cod protein facilitated multiple modifications on a single peptide. These findings provide new tools and insights for the study of food protein modification.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Jiahao Ren,Yiting Fan,Xinglong Xiao,Yifang Cao,Youning Zou,Xuying Luo,Fengsong Liu
Chlorogenic acid (CGA) is a bioactive phenolic compound with antioxidant and antimicrobial properties, but its poor solubility, stability, and bioavailability limit practical use in food preservation. In this study, a novel starch@CGA emulsion was developed using gelatinized starch as the core, a CGA-rich MCT oil phase, and Tween-80 as stabilizer. FTIR and microscopic confirmed successful encapsulation and uniform dispersion. Molecular docking simulations showed tight and stable binding of CGA to the starch matrix, contributing to prolonged retention. The emulsion showed strong antioxidant activity, with 0.10 mg/mL CGA achieving 85.28 % and 96.61 % scavenging of DPPH and ABTS radicals, respectively, and reduced Shewanella putrefaciens viability to 0.61 %. Transcriptomic analysis revealed that the emulsion disrupted bacterial energy metabolism, oxidative stress response, and key metabolic pathways. In cod fillet preservation, the emulsion extended shelf life from 6 to 8 days, inhibited spoilage, and reduced oxidation. This biocompatible, food-grade emulsion offers promising potential for active food packaging and preservation.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shiva Pandeya,Rui Ding,Qianqian Shang,Xueqing Zhu,Yufei Ma,Xuling Han,Meixing Gui,Narayan Bhattarai,Ziliang Li,Mahesh Kumar Joshi
This study aims to develop a reusable, self-supporting Ag 2 S/TiO 2 photocatalyst for the degradation of tetracycline hydrochloride (TCH) and chemical oxygen demand (COD) removal under visible light irradiation. The flexible Ag 2 S/TiO 2 nanofibrous membranes (NFMs) were prepared by electrospinning and subsequent calcination followed by the deposition of Ag 2 S quantum dots (QDs) on TiO 2 nanofibers by the successive ionic layer adsorption and reaction (SILAR) method. The precise deposition of Ag 2 S QDs preserved the self-standing properties of TiO 2 NFM, and the amount of Ag 2 S QDs was regulated by altering precursor concentration while keeping the SILAR cycles constant. The SEM-EDX, XPS, TEM, and PL measurements confirmed the formation of an Ag 2 S/TiO 2 heterojunction, which lowered the band gap energy to 2.68 eV. This band gap engineering reduced the electron-hole pair recombination and accelerated TCH degradation and COD removal under visible light. The photocatalytic degradation of TCH obeyed pseudo-first-order reaction dynamics, showing a strong influence of the Ag 2 S amount and the pH of the TCH solution on degradation. The Ag 2 S/TiO 2 heterojunction exhibited superior photocatalytic degradation, achieving up to 85.6 % in 90 min, compared to 66.6 % for TiO 2 NFM. The TCH degradation rate significantly increased from 0.012 min⁻¹ for TiO 2 NFM to 0.029 min⁻¹ for Ag 2 S/TiO 2 NFM, marking a 2.4-fold improvement. Furthermore, the optimal TCH degradation occurred at neutral pH 7, while COD removal (94.2 %) from pharmaceutical samples was most effective at acidic pH 5, demonstrating the significant influence of pH on photocatalytic pollutant removal. The as-prepared Ag 2 S/TiO 2 NFM demonstrated strong recyclability, retaining high efficiency after five cycles of use, while maintaining its self-supporting properties, allowing for easy separation after application.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Kun Zhou,Boran Wu,Lianghu Su,Xiaofeng Gao,Xiaoli Chai,Xiaohu Dai
Severe water pollution caused by excessive emissions of phosphorus (P) and nitrogen (N) into water bodies is a significant concern worldwide. In the present study, we synthesized a novel nano composite, nano-CaO 2 @clinoptilolite, for the simultaneous removal of P, COD, and N from sewage. X-ray diffraction and X-ray photoelectron spectroscopy were used to characterize the crystalline composition of the nano composite and confirm the presence of CaO 2 . The spatial distribution of nano CaO 2 particles and the microtopography of nano-CaO 2 @clinoptilolite were characterized by transmission electron microscopy and energy-dispersive X-ray spectroscopy. P uptake analysis indicated that nano-CaO 2 @clinoptilolite was highly effective for P removal over a wide pH range of 7.0–11.0, and that phosphate precipitation induced by the solubilization of Ca 2+ from CaO 2 was determined to be the main mechanism of P removal. In addition, simultaneous P, COD, and N removal efficiencies of 50.4, 74.7, and 80.7%, respectively, were obtained when nano-CaO 2 @clinoptilolite was applied to sewage samples. The realization of synergistic peroxidation, adsorption, and precipitation by nano-CaO 2 @clinoptilolite provides a novel insight into the high-efficiency purification of sewage.
研究领域:
环境科学
·
水处理
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）