Journal of the Taiwan Institute of Chemical Engineers
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2016
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IF 2.848
Yuanfeng Qi,Bibo Dai,Shengbing He,Suqing Wu,Jungchen Huang,Fei Xi,Yucheng Ma,Meng Meng
In order to solve disposal problems of hazardous solid wastes, oxytetracycline mycelia residue (OMR) and dredged heavy metal-contaminated sediments (DS) from Tai Lake were utilized as raw materials to produce ultra-lightweight ceramsite (ULC). Effects of mass ratios of organic matters/SiO 2 +Al 2 O 3 (O/SA) and MgO+Fe 2 O 3 +CaO/SiO 2 +Al 2 O 3 (MFC/SA) on characteristics of the ceramsite were investigated to optimize the ULC production process. Our results show that OMR and DS were suitable materials for ULC production, while the optimal mass ratios of O/SA and MFC/SA were 0.180–0.296 and 0.115–0.185, respectively. The addition of MFC lowered down the softening temperature and the viscosity of glass phase in ceramsite, promoting the crystallization in the glass phase. A proper MFC/SA ratio of 0.105–0.165 promoted the glass phase and increased the porosity of ceramsite. Al 2 O 3 and SiO 2 played a significant role in the formation process of crystals. However, the varying O/SA ratios only slightly impacted the variation of major crystalline phases and the viscosity of the glass phase. High MFC/SA ratios (≥0.205) decreased the crystallization of quartz, mullite and kyanite, but increased more complex crystalline phases. Additionally, the sintering process immobilized the heavy metals and could be a promising technology to control OMR pollution.
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APPLIED SOIL ECOLOGY
·
2024
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IF 4.8
Kiran Yasmin Khan,Yi Tang,Pengfei Cheng,Yunliang Song,Xinyu Li,Jiabao Lou,Babar Iqbal,Xin Zhao,Rashida Hameed,Guanlin Li,Daolin Du
Microplastics and antibiotics are emerging contaminants that can elicit considerable adverse effects on carbon and nitrogen cycles and greenhouse gas emissions. The effect of the combined occurrence of antibiotics and different types of microplastics on soil ecosystem is poorly understood. We investigated the effects of oxytetracycline (OTC), polylactic acid (PLA) microplastics, and polyethylene (PE) microplastics alone and in combination on plant root growth traits, soil extracellular enzymatic activity, and nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) emissions from the soil. Plant root growth traits including root area, root surface area, root volume and root branches were negatively affected by all treatments; soil extracellular enzymatic activity was also negatively affected by all treatments expect for the cellobiohydrolase. The results showed that CO 2 emission increased in all treatments, with a maximum increase of 505 % in the PLA treatment; however, N 2 O emissions increased in the OTC treatment by 44 % but decreased in all other treatments as compared to the control. Furthermore, partial least squares path modeling analysis suggested that soil extracellular enzymes significantly influenced soil N 2 O and CO 2 emissions ( P < 0.05) and had a strong correlation with root growth traits ( P < 0.05). We thus concluded that changes in soil extracellular enzymatic activities and plant root growth traits, which were affected by different microplastic and antibiotic treatments, influenced soil CO 2 and N 2 O gas emissions.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Liang Yang,Zhiqiang Chen,Yingcai Tang,Qinxue Wen
Oxytetracycline (OTC) in the environment can cause the increase of resistance of pathogenic microorganisms and the spread of antibiotic resistance genes, which poses a serious threat to human health and ecological environment, so the removal of OTC has attracted much attention. In this study, Magnetic ion-exchange resin (MIEX) was used as the adsorbent to remove OTC. The adsorption mechanisms of OTC by MIEX was analyzed through adsorption experiment, characterization analysis and theoretical calculation. The results showed that the adsorption of OTC by MIEX was more consistent with pseudo-first-order kinetic model and Freundlich isotherm model, was mainly chemical adsorption and endothermic. The presence of anions of PO 4 3- , SO 4 2- , Cl - , NO 3 – and organic matter (HA) competed for the adsorption site of MIEX, reduced the removal efficiency of OTC by 22.7 %, 20.0 %, 10.9 %, 7.8 % and 5.8 %, respectively. pH affected the presence of OTC, under alkaline condition, OTC was mainly anion, which was conducive to the anion exchange process. The existence of H bond was confirmed by the theoretical calculation and characterization analysis. MIEX was more reactive with OTC in alkaline conditions, and the binding energy of MIEX-OTC - was −114.60 kcal/mol. In real secondary effluent, various anions and negatively charged pollutants would reduce the removal of OTC, and correlation analysis showed that there was a significant correlation between the removal of OTC and cluster Ⅰ pollutants (C1-C4 and UV 254 ), which could reflect the removal of OTC. This research provides a feasible technical strategy for the removal of hydrophobic refractory substances in wastewater advanced treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xixi Di,Xia Zeng,Tian Tang,Dong Liu,Yixuan Shi,Wei Wang,Zhifeng Liu,Lingxia Jin,Xiaohui Ji,Xianzhao Shao
The application of heterogeneous metal-free catalysis for non-radical peroxymonosulfate (PMS) oxidation is of great significance because of its low environmental effects and mild oxidant dosage. The purpose of this study was to investigate the activation mechanism of PMS using acid-modified activated carbon and oxytetracycline (OTC) as a representative pollutant. Modified activated carbon (MAC)/PMS system was capable of achieving 100 % degradation efficiency of OTC within 60 min, with an observed rate constant ( k obs ) of 0.0414 min −1 . The degradation of OTC is dominated by non-radical oxidation pathways involved in mediated singlet oxygen ( 1 O 2 ) and electron-transfer process through electron paramagnetic resonance (EPR) and radicals quenching studies. The activation of PMS is attributed to the structural defects of MAC, persistent free radicals, and oxygen functional groups such as C-OOH. Moreover, the MAC/PMS system consistently demonstrates high and reliable contaminant removal in various water matrices. A continuous-flow device utilizing MAC shows excellent performance in purifying micro-polluted water. Additionally, the degradation pathways of pollutants and changes in toxicity during the degradation process were identified through density functional theory (DFT) calculations, liquid chromatography-mass spectrometry (LC-MS), and toxicological analysis. Finally, the cultivation of green beans, peas, and wheat was found to significantly decrease the toxicity of contaminated water through degradation. This study proposes a low-cost method to enhance the activation pathway of non-radical PMS by utilizing modified activated carbon materials for pollutant remediation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jiawen Zhang,Haoyang Xu,Yage Zheng,Yue Shen,Chaoqun Mu,Yao Wang,Aili Niyazi,Zhixian He,Zhiqiang Zhang,Liang Zhang,Juanqin Xue
In this work, a Z -scheme heterostructured BiOCOOH/O-gC 3 N 4 material was synthesized and immobilized on chitosan (CTS) to obtain the BiOCOOH/O-gC 3 N 4 /CTS photocatalytic material for photocatalytic degradation of oxytetracycline hydrochloride (CTC).Our findings indicate that the composite material BiOCOOH/O-gC 3 N 4 , as well as the BiOCOOH/O-gC 3 N 4 /CTS composite membrane , displayed a significantly higher efficiency in photocatalytic degradation of CTC compared to BiOCOOH alone, owing to the synergistic effect of adsorption and photocatalysis . Following four cycles of use, the composite material retained around 96 % of its initial photocatalytic degradation activity. The addition of CTS in the photocatalytic material resolved issues such as aggregation and difficult recovery commonly encountered with powder materials, thereby facilitating effective collision between the photocatalytic active sites and CTC. Experimental and theoretical calculations provided confirmation that the combination of BiOCOOH and O-gC 3 N 4 effectively enhanced the light absorption capacity and photocatalytic performance. Furthermore, we investigated the influence of environmental factors such as pH value and anions on the photocatalytic degradation experiment, which offers valuable insights for the application of composite catalysts in wastewater treatment .
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Degui Gao,Yuefei Huang,Shungui Zhou,Bing Li,Guangqian Wang
Seawater, as an alternative magnesium (Mg) source, has the potential to improve the overall economic and environmental footprint of struvite production compared to the use of pure Mg salts. However, the presence of other ions in seawater may affect the migration of tetracyclines (TCs), commonly found in wastewater, potentially reducing the quality of the recovered product, and posing environmental risks. But these effect has not been illustrated before. This study investigated the impact of seawater on oxytetracycline (OTC) migration during struvite recovery from swine wastewater. Under varying pH levels and Mg/P molar ratios, the OTC content in recovered struvite was ranged from 19 to 103 μg/g, which was 6 to 43 μg/g when using MgCl 2 as Mg source. The key factor influencing OTC content was identified as Ca 2+ in seawater. The co-precipitation of hydroxyapatite (HAP) and the incorporation of dissolved organic matter (DOM) were the primary reasons for increased OTC content. Interactions between Ca 2+ on HAP surfaces and the carbonyl oxygen of OTC, along with ternary complex formations involving Ca 2+ , DOM, and OTC, facilitated OTC migration through adsorption onto struvite. Notably, increasing the Mg/P molar ratio reduced OTC enrichment due to the competition between Ca 2+ and Mg 2+ . Density functional theory (DFT) calculations supported these interfacial interactions. These findings enhanced the understanding of antibiotic migration during phosphorus (P) recovery using seawater as alternative Mg source and suggested solutions for reducing P recovery contamination in the future.
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BIORESOURCE TECHNOLOGY
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2016
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IF 4.917
Zhetai Hu,Peide Sun,Zhirong Hu,Jingyi Han,Ruyi Wang,Liang Jiao,Pengfei Yang
The effects of Erythromycin (ERY) and oxytetracycline (OTC), including individual and combinative effect, on enhanced biological phosphorus removal (EBPR) system within a short-term (24 h) were evaluated in this study. Results showed that the P-removal efficiency decreased to 34.6% and 0.0% under the effect of ERY (10 mg/L) and OTC (10 mg/L) for 24 h. OTC concentration higher than 5 mg/L was sufficient to cause serious adverse impact on the EBPR performance. While the performance of EBPR system will be impacted by ERY above 10 mg/L. OTC, due to its special antibacterial action to the gram-negative bacteria which most PAOs belong to, has more serious negative effect on the EBPR performance than ERY does. Moreover, in the combined antibiotics test, neither synergistic nor antagonistic effect was detected between ERY and OTC. Finally, ERY (10 mg/L) and OTC (10 mg/L) could inhibit the microorganisms’ activity, while couldn’t induce serious microorganisms death within 24 h.
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Analytical Methods
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2026
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IF 2.6
Tianyi Zhu,Jian Zhang,Danyi He,Yiwen Yang,Hailong Wang,Jianbo Wang,Longhua Guo,Lei Li,Jianrong Chen,Yanbo Zeng
Oxytetracycline (OTC) residues have seriously threatened human health, as they may trigger allergic responses, hepatotoxicity, and the development of bacterial resistance. Detecting OTC in samples is therefore important. This work developed a pyrene-based fluorescent molecularly imprinted polymer (Py-FMIP) to rapidly and selectively detect OTC. N-allyl-4-(pyren-1-yl) butanamide (Al-Py), a new alkenyl functional monomer, was synthesized using 1-pyrenebutyric acid as the raw material with simple synthesis process. Py-FMIP was then obtained with Al-Py as a functional monomer and OTC as a template molecule. The Al-Py and Py-FMIP absolute fluorescence quantum yields were 74.05% and 69.27%, separately, suggesting the high fluorescence performances of two materials. The fluorescence of Py-FMIP was strongly quenched by OTC through inner filter effect. The prepared Py-FMIP sensor responded to OTC within 1 min, its linear detection range was 0.5–150 μM, and its detection limit was 0.05 μM (S/N = 3). The prepared Py-FMIP sensor also exhibited notable selectivity toward OTC. The recoveries of the Py-FMIP fluorescent sensor were 96.37%–104.60% in milk and tap water, with relative standard deviations lower than 5.13%.
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OPTICAL MATERIALS
·
2026
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IF 4.2
Jie Chen,Lijiao Sun,Xiaoyun Pu,Kezhen Qi,Ya Yan
Water-soluble ZnS-coated AgInS 2 quantum dots (AIS/ZnS QDs) were synthesized via a one-pot aqueous method, and their crystal structure, surface composition, morphology and optical properties were systematically characterized. Based on the fluorescence quenching effect of AIS/ZnS QDs toward oxytetracycline (OTC), a fluorescence spectrophotometric method was established for OTC detection in milk. Under optimal conditions (QDs preparation at pH 5.5, detection temperature of 20 °C, and detection concentration of 0.160 g/L, with a 25 min reaction time), the relative fluorescence quenching degree (ΔF/F 0 ) showed a good linear correlation with logC (OTC concentration), with a linear equation of ΔF/F 0 = 0.2933 logC + 2.3388 (R 2 = 0.9984), a linear range of 1.22 × 10 -8 to 2.5 × 10 -5 mol/L and a detection limit of 1.82 × 10 -9 mol/L. The spiked recoveries of OTC in milk were 96.9%-107.1%. Furthermore, the possible quenching mechanism was proposed. This work offers insights into AIS-based functional material synthesis and expands their applications in fluorescence analysis.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Lanlan Wei,Yilan Zhao,Yaoye Chen,Ke Huang,Xiaoli Xiong,Qing Yang
A dual-emission CDs@Eu-DPA composite was rapidly synthesized via dielectric barrier discharge microplasma technology using carbon dots (CDs), 2,6-dipicolinic acid (DPA), and Eu 3+ as precursors. CDs@Eu-DPA was subsequently applied for ratiometric fluorescence and visual analysis of oxytetracycline (OTC) in food samples. When OTC was introduced, the blue fluorescence of CDs was quenched via the inner filter effect, while OTC coordinated with Eu 3+ in Eu-DPA to form a complex, leading to the enhancement of the red fluorescence of Eu 3+ at 615 nm through antenna effect. Additionally, principal component analysis was employed to distinguish four different antibiotics, including OTC, chlortetracycline, tetracycline, and doxycycline. Under optimized conditions, the ratiometric fluorescence analysis and smartphone-assisted RGB analysis exhibited linear detection ranges of 0.05–210.0 μM and 0.3–90.0 μM for OTC, respectively, with limits of detection of 0.02 μM and 0.08 μM, respectively. The satisfactory recoveries in food samples were ultimately achieved through the dual-mode sensing method.
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JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Hongbin He,Xi Zhu,Ziping Huo,Bolong Liang,Shu-Xuan Liang
AgI@MIL-101(Fe) photocatalyst was fabricated via in-situ precipitation method. • The photocatalyst achieved 95.25% degradation efficiency of OTC within 180 min. • The photocatalyst exhibited excellent practical applicability in real water samples. • Z-scheme heterojunction mechanism and degradation pathway were elucidated. Owing to their extensive and long-term application as well as poor degradability, antibiotics are inevitably persistent in aquatic environments due to their extensive and long-term use as well as heir difficulty in degradation. The development of efficient photocatalysts is therefore of crucial significance in environmental purification. In this study, a Z-scheme MIL-101(Fe) heterojunction photocatalyst was rationally designed and fabricated via a combined solvothermal and in-situ precipitation methods for the efficient removal of oxytetracycline hydrochloride (OTC), where MIL-101(Fe) is a typical member of the metal-organic framework (MOF) family. A series of characterization methods were employed to systematically observe the morphology and microstructure, optical properties, and photocatalytic performance of the as-prepared photocatalyst. The AgI@MIL-101(Fe) nanocomposites achieved an OTC degradation efficiency of 95.25% within 180 min under visible-light irradiation, demonstrating superior photocatalytic activity compared to a single-component counterparts. Structural characterizations results indicated that AgI formed a tight interface contact with MIL-101(Fe), which provided an effective structural foundation for theheterojunction construction. AgI particles were well dispersed on MIL-101(Fe), effectively mitigating their aggregation and thus creating abundant light absorption and reaction sites for photocatalytic reactions. Photoelectrochemical measurements further demonstrated that the nanocomposite possessed strong light absorption ability and high separation efficiency for photogenerated carriers. The as-prepared photocatalyst also exhibited excellent practical applicability in the treatment of actual water samples from Baiyangdian Lake. Five cycles of experiments indicated that its outstanding structural and catalytic stability. Mechanistic investigations identified superoxide radicals (•O 2 − ) as the primary active factors responsible for OTC degradation. Finally, the typical Z-scheme heterojunction mechanism and degradation pathway of OTC were finally proposed. This work provides a new design strategy and practical reference for the development of high-performance photocatalysts targeting the efficient removal of OTC and other antibiotics from aquatic environments. Download: Download high-res image (211KB) Download: Download full-size image
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 18
·3229
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IF 5.1
Xinyi Yang,Yuxin Tang,Fei Qi,Zhihan Xue,Huiying Zhang,Zhaohai Ni,Bo Feng,Ziyang Yue,Guangbo Che
Efficient and reusable photo-Fenton catalysts require the rational integration of photocatalytic platforms, effective H 2 O 2 activation sites, and practical immobilization strategies. Herein, nitrogen-vacancy-rich tubular g-C 3 N 4 (HCNT) was prepared as the photocatalytic platform. Iron (II) phthalocyanine (FePc) was then loaded onto HCNT to form the FePc/HCNT composite for antibiotic degradation. The FePc/HCNT composite was further immobilized in a poly (vinylidene fluoride) (PVDF) membrane, denoted as FePc/HCNT-PVDF, to facilitate catalyst recovery and reuse. Benefiting from the micrometer-scale tubular morphology, the FePc/HCNT remained exposed on the membrane surface, preserving accessible catalytic interfaces and reducing encapsulation within the polymer matrix. The tubular architecture facilitated reactant transport, while surface nitrogen vacancies enhanced photogenerated-carrier separation and utilization. Component-dependent experiments revealed that FePc served as the primary center for H 2 O 2 activation, whereas HCNT functioned as a defect-engineered tubular photocatalytic platform that promoted photogenerated-carrier separation and reactive oxygen species formation. The optimized FePc/HCNT achieved 94% oxytetracycline degradation within 60 min, with an apparent rate constant of 0.04462 min −1 , approximately 11 times higher than bulk g-C 3 N 4 , and exhibited broad-spectrum degradation capability toward various organic pollutants, including rhodamine B, tetracycline, amoxicillin, and ciprofloxacin. The FePc/HCNT-PVDF membrane removed 90% of oxytetracycline within 60 min and maintained stable performance over ten cycles. This work provides insights into the integrated roles of nitrogen vacancy regulation, FePc-mediated H 2 O 2 activation, and morphology-assisted membrane immobilization in the development of reusable g-C 3 N 4 -based photo-Fenton catalysts.
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