International Journal of Environmental Research and Public Health
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2022
·Vol. 19
·期 22
·14726
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IF 4.614
Hong Xiao,Qing Liu,Yingjun Wang,Ying Zhu,Dexin Fang,Ganxue Wu,Zhenxing Zeng,Hong Peng
Fe(II)-activated potassium periodate (KIO4) oxidation was used to improve the dewaterability of waste-activated sludge for the first time. Compared with those of raw sludge, the capillary suction time (CST), specific resistance filtration (SRF), and water content of filter cake (WC) of sludge treated using the Fe(II)/KIO4process under the optimal conditions (i.e., the initial pH = 6.8, KIO4dose = 1.4 mmol/g volatile suspended solids, Fe(II)/KIO4molar ratio = 1.2) decreased by 64.34%, 84.13%, and 6.69%, respectively. For conditioned sludge flocs, the Zeta potential and particle size were increased, and hydrophilic proteins in extracellular polymeric substances (EPS) were partly degraded, accompanied by the transformation of tightly bound EPS into soluble EPS and the conversion of dense sludge flocs into loose and porous ones. During Fe(II)/KIO4oxidation, Fe(IV) and the accompanying•OH were determined as the predominant reactive species and the underlying mechanism of sludge EPS degradation was proposed. This work provides a prospective method for conditioning the sludge dewaterability.Keywords:sludge dewaterability;ferrous ion;potassium periodate;extracellular polymeric substances
研究领域:
环境工程
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废水处理
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PubMed
高影响因子
Analytical Methods
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2016
·Vol. 8
·期 20
·4056-4063
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IF 1.915
Shifeng Li,Li Zhang,Lei Chen,Yiman Zhong,Yonghong Ni
ZnSe quantum dots (QDs) with a homogeneous size distribution and good stability were synthesized by the reaction of zinc acetate and NaHSe in the presence of glutathione (GSH). The obtained ZnSe QDs were characterized using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). Simultaneously, UV-visible spectroscopy (UV-vis) was performed and the fluorescence properties of ZnSe QDs were investigated. The effect of ZnSe QDs on the luminol–potassium periodate (KIO4) chemiluminescence (CL) system, a popular model CL system, was researched. It was found that as-prepared ZnSe QDs could strongly enhance the chemiluminescence (CL) of the luminol–KIO4 system. To discuss the mechanism of the CL enhancement, we studied the UV-vis and CL spectra of the luminol–KIO4–ZnSe QDs system. The CL enhancement should be attributed to the oxidation of luminol to its excited state by KIO4, under the catalysis of ZnSe QDs, which caused strong light emission. It was found that rutin, p-t-butylprocatechol, catechol, paracetamol, resorcinol and tryptophan could markedly inhibit the CL of the luminol–KIO4–ZnSe QDs system among 17 kinds of amino acids and 23 other kinds of organics. The above phenomena presented good linear relations. Thus, effective methods to detect them were developed.
研究领域:
分析化学
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生物医学工程
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高影响因子
LUMINESCENCE
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2010
·Vol. 26
·期 6
·397-402
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IF 1.209
Ying Liu,Zhifeng Fu,Lin Wang
A rapid and simple capillary electrophoresis method coupled with chemiluminescent (CL) detection was proposed for analysis of isoniazid (ISO) based on the enhancement effect of ISO to CL emission of luminol-periodate potassium reaction. Under the optimal conditions, ISO can be assayed in the range of 7.0 × 10 −7 to 3.0 × 10 −5 g mL −1 ( R 2 = 0.9990) with a limit of detection of 3.0 × 10 −7 g mL −1 (signal-to-noise ratio of 3). The whole analysis process can be completed within 2.5 min with a theoretical plate number of 6258. The relative standard deviations of the signal intensity and the migration time were 3.1 and 1.4% for a standard sample at 1.0 × 10 −5 g mL −1 ( n = 5), respectively. The presented novel strategy was successfully applied to the determination of ISO in commercial pharmaceutical preparations and spiked human serum samples. Copyright © 2010 John Wiley & Sons, Ltd.
研究领域:
分析化学
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药物分析
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2024
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IF 6.7
Xiaoxuan Ren,Zhijian Tian,Xuwen Gao,Yaojia Ai,Mengwei Li,Bin Zhang,Guizheng Zou
Chemiluminescence (CL), especially commercialized CL immunoassay (CLIA), is normally performed within the eye-visible region of the spectrum by exploiting the electronic-transition-related emission of the molecule luminophore. Herein, dual-stabilizers-capped CdTe nanocrystals (NCs) is employed as a model of nanoparticulated luminophore to finely tune the CL color with superior color purity. Initialized by oxidizing the CdTe NCs with potassium periodate (KIO4), intermediates of the reactive oxygen species (ROS) tend to charge CdTe NCs in both series-connection and parallel-connection routes and dominate the charge-transfer CL of CdTe NCs. The CdTe NCs/KIO4 system can exhibit color-tunable CL with the maximum emission wavelength shifted from 694 nm to 801 nm, and the red-shift span is over 100 nm. Both PL and CL of each of the CdTe NCs are bandgap-engineered; the change in the NCs surface state via CL reaction enables CL of each of the CdTe NCs to be red-shifted for ∼20 nm to PL, while the change in the NCs surface state via labeling CdTe NCs to secondary-antibody (Ab2) enables CL of the CdTe NCs-Ab2 conjugates to be red-shifted for another ∼20 nm to bare CdTe NCs. The CL of CdTe753-Ab2/KIO4 is ∼791 nm, which can perform near-infrared CL immunoassay and semi-automatically determined procalcitonin (PCT) on commercialized in vitro diagnosis (IVD) instruments.
研究领域:
纳米技术
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分析化学
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生物医学工程
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临床诊断
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PubMed
高影响因子
Carbohydrate Polymer Technologies and Applications
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2026
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IF 7.6
Xiaolong Zhou,Beilin Dong,Yushan Jiang,Wenyi Zhang,Wenjun Sun,Xi Yuan,Mengyang Bao,Chen Yu,Congjiu Liu,Shuangjian Yang,Yan Zhou,Siliang Liu,Yunhui Xu
Chitosan, as one of the most sustainable biomaterials in green and renewable resources, has been widely practised because of its good biocompatibility and biodegradability. However, the challenge of limited solubility of chitosan in neutral or alkaline media (pH ≥ 6.5) has been clearly pinpointed. In this study , a novel water-soluble and fiber-reactive O -[(2‑hydroxy-3-trimethylammonium)propyl] chloride oxidized chitosan ( O HACOC) was prepared with a view to developing the antibacterial finishing agent of textile fibers. The resulted O HACOC contained dicationic groups of quaternary ammonium salt groups at C6 site and amino groups at C2 position in chitosan backbone, which offered good water solubility and antibacterial activity in the wider pH ranges. The water solubility of O HACOC prepared under the optimized process can reach 23.7 g/100 mL, and its minimum inhibitory concentrations were lower than 0.0625 mg/mL against Escherichia coli and 0.125 mg/mL against Staphylococcus aureus , respectively. Meanwhile, O HACOC also showed the high antioxygenic property. This work provides ideas for the design and development of novel functional chitosan derivatives.
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高影响因子
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
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2026
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IF 2.2
Qiucheng Luo,Gangxiang Fei,Xiaoguang Tian,Shuang Han,Jingqiang Guan,Bo Song,Longzhan Gan,Yeming Zhou,Zhijie Wang,Hongbo Lan,Xiao Zou
Two chemotypes, CTA and CTB, were identified in Cordyceps chanhua for the first time. • Intracellular nucleosides were key markers of chemotype differentiation. • CTA showed significantly higher intracellular uridine, guanosine, adenosine, and HEA than CTB. • Altitude and precipitation were the major environmental factors associated with chemotype differentiation. • Intracellular nucleosides showed significant negative correlations with altitude and precipitation and strong positive correlations with each other. Cordyceps chanhua is a valuable medicinal and edible fungus with great potential for functional food development because of its bioactive metabolites with significant pharmacological activities. However, samples from different geographical origins show significant variations in metabolite composition and content. Existing studies are mostly limited to local regions and lack systematic evaluation based on multi-regional samples, particularly regarding chemotype classification and its environmental driving mechanisms. Therefore, this study systematically analyzed the differences in bioactive metabolites, chemotype differentiation patterns, and their environmental driving factors using multi-regional samples. A total of 123 C. chanhua samples were collected from 16 regions across 8 provinces in China. Key bioactive metabolites, including uridine, guanosine, adenosine, N6-(2-hydroxyethyl)-adenosine (HEA), cordycepic acid, extracellular polysaccharides, and ergosterol, were determined in liquid fermentation broth. The results showed significant geographical differences in metabolite accumulation. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) classified the samples into two chemotypes, Chemotype A (CTA) and Chemotype B (CTB). CTA exhibited significantly higher intracellular nucleoside contents than CTB ( p < 0.01), and intracellular nucleosides were identified as the core variables driving chemotype differentiation. Environmental analysis showed that CTA was mainly distributed in low-altitude and low-precipitation regions, while intracellular nucleosides were significantly negatively correlated with altitude and precipitation. Correlation network analysis further revealed synergistic accumulation patterns among multiple metabolites. This study revealed the geographical variation characteristics of bioactive metabolites in C. chanhua , identified its chemotypes for the first time, and clarified that intracellular nucleosides are key chemical markers for chemotype classification. Download: Download high-res image (340KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xianni Song,Xinhua Xu,Donglei Wu,Haijiao Xie
Sulfoxides are widely recognized as probes for identifying and evaluating the generation and contribution of high-valent metals in advanced oxidation processes. However, this paper was surprising to find that the presence of sulfoxides selectively enhanced the degradation of specific pollutants in the Fe(II)/PS system. Represented by methyl phenyl sulfoxide (PMSO), scavenging experiments for active species showed that the presence of PMSO transformed the mechanism from radical dominated (55.60 %) to nonradical dominated (60.91 %), greatly improving the anti-interference ability of the system. Determining the concentration of Fe(Ⅱ) and total iron (Fe tot ) in solution revealed that the presence of PMSO improved the utilization efficiency of Fe(II) and PS by enhancing the redox reaction between Fe(II) and PS, and resulted in the generation of Fe(IV) more favorably than the generation of SO 4 ·− and ·OH. Additionally, comparing the proven high-valent iron dominated Fe(II)/PI system with the free radical dominated Fe(II)/PS system of this paper, it was revealed that the selectively enhanced oxidation of PMSO specifically targets the free radical dominated system. Experiments have shown that the degradation of acetaminophen, ibuprofen, phenol, and p-chlorophenol was enhanced by PMSO, while the degradation of norfloxacin, primidone, chloramphenicol, sulfamethoxazole, p-nitrophenol, benzoic acid, and nitrobenzene was inhibited. Based on density functional theory (DFT) calculations, PMSO has a selectively enhanced degradation effect for organic pollutants with ionization potential (IP) below 8.66 eV, and vice versa, it has an inhibitory effect. The present study provides new insights into the contribution of sulfoxide to the assessment of high-valent metals and sheds new light on the mechanism of active species.
研究领域:
环境科学
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化学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Shifeng Tang,Lin Zhang,Zhaohui Tong,Zhiping Wu,Hui Wang,Peng Zhan,Lishu Shao,Yan Qing,Yougen Wu,Jin Liu
As an essential trace element for plant growth and development , manganese plays a crucial role in the uptake of the heavy metal cadmium by rice ( Oryza sativa L.). In this study, we developed a novel slow-release manganese fertilizer named Mn@LNS-EL. Initially, lignin nanoparticles were derived from sodium lignosulfonate, and a one-step emulsification strategy was employed to prepare a water-in-oil-in-water (W/O/W) Pickering double emulsions. These double emulsions served as the template for interfacial polymerization of lignin nanoparticles and epichlorohydrin, resulting in the formation of microcapsule wall materials. Subsequently, manganese fertilizer (MnSO 4 ) was successfully encapsulated within the microcapsules. Hydroponic experiments were conducted to investigate the effects of Mn@LNS-EL on rice growth and the cadmium and manganese contents in the roots and shoots of rice under cadmium stress conditions. The results revealed that the treatment with Mn@LNS-EL markedly alleviated the inhibitory effects of cadmium on rice growth, leading to notably lower cadmium levels in the rice roots and shoots compared to the specimens treated without manganese fertilizer. Specifically, there was a reduction of 37.9 % in the root cadmium content and a 17.1 % decrease in the shoot cadmium content. In conclusion, this study presents an innovative approach for the high-value utilization of lignin through effective encapsulation and slow-release mechanisms of trace-element fertilizers while offering a promising strategy for efficiently remediating cadmium pollution in rice.
研究领域:
农业科学
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环境科学
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材料科学
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植物生理学
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PubMed
高影响因子
Analytical Methods
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2024
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IF 2.7
Xue Hua Wang,Mei Ju Luo,Xinyu Li,Qingling Yang,Zhishun Guo,Hao Lin Zou,Hong Qun Luo,Nian Bing Li,Bang Lin Li
In this work, 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) was pre-doped into agarose hydrogels; consequently, sustained hydrogel systems with modulated release performance were constructed for simple operation and recyclability in point-of-care detection of formaldehyde (FA). With the increase in FA concentrations, the absorbance response of the supernatant solutions showed linear relationships and the color of the reaction mixtures gradually increased. The detection limit was calculated to be 0.013 μg mL−1. To verify its practical application, a simple, rapid and low-cost FA detection platform was built on the basis of the optimized conditions, and the method shows the merits of simplicity, high sensitivity and selectivity. More importantly, the developed hydrogels are recyclable and can be used at least five times without any loss in sensing performance. Significantly, the sensory hydrogels can be employed by non-skilled people for monitoring food safety and applied for the practical detection of FA in foods.
研究领域:
分析化学
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食品科学
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生物材料学
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PubMed
高影响因子
Asian Journal of Pharmaceutical Sciences
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2024
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IF 10.7
Xianglei Fu,Yanbin Shi,Zili Gu,Hengchang Zang,Lian Li,Qingjie Wang,Yongjun Wang,Xiaogang Zhao,Hang Wu,Shengnan Qiu,Yankun Zhang,Jiamin Zhou,Xiangqin Chen,Hua Shen,Guimei Lin
Despite standard treatment for non-small cell lung cancer (NSCLC) being surgical resection, cancer recurrence and complications, such as induction of malignant pleural effusion (MPE) and significant postoperative pain, usually result in treatment failure. In this study, an alginate-based hybrid hydrogel (SOG) is developed that can be injected into the resection surface of the lungs during surgery. Briefly, endoplasmic reticulum-modified liposomes (MSLs) pre-loaded with the signal transducer and activator of transcription 3 (STAT3) small interfering RNA and lidocaine hydrochloride are encapsulated in SOG. Once applied, MSLs strongly downregulated STAT3 expression in the tumor microenvironment, resulting in the apoptosis of lung cancer cells and polarization of tumor-associated macrophages towards the M1-like phenotype. Meanwhile, the release of lidocaine hydrochloride (LID) was beneficial for pain relief and natural killer cell activation. Our data demonstrated MSL@LID@SOG not only efficiently inhibited tumor growth but also potently improved the quality of life, including reduced MPE volume and pain relief in orthotopic NSCLC mouse models, even with a single administration. MSL@LID@SOG shows potential for comprehensive clinical management upon tumor resection in NSCLC, and may alter the treatment paradigms for other cancers.
研究领域:
肿瘤学
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药理学
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生物医学工程
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免疫疗法
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分子生物学
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PubMed
高影响因子
ACS ES&T Engineering
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2025
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IF 6.7
Anting Ding,Chenchen Zhu,Chuanying Liu,Chengliang Xiao
Precious metal (PM) recovery from discarded waste is essential to mitigate supply risks; however, traditional methods typically cause substantial environmental harm. This study presents a novel leaching process employing a low-concentration peroxymonosulfate (PMS)/CoCl2 Fenton-like system for the efficient recovery of gold (Au), palladium (Pd), and platinum (Pt) from electronic waste and spent catalysts. Through electron paramagnetic resonance spectroscopy, 18O isotope tracing, and density functional theory calculations, SO4·–, ·OH, and reactive Co species were identified as the primary reactive species responsible for the oxidative dissolution of the PMs. Notably, the spontaneous cycling between Co(II) and Co(III) oxidation states sustained the solution’s reactivity for over 12 consecutive cycles. To demonstrate the efficacy of this method, hectogram quantities of spent Pd/C catalyst were processed, yielding 1.97 g of high-purity Pd. Operating at room temperature and without the need for strong acids or toxic cyanides, this method offers a sustainable alternative for PM recovery. Furthermore, this study highlights the broader potential of advanced oxidation processes for the efficient and environmentally friendly recycling of secondary resources.
研究领域:
环境科学
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化学工程
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xiaofang Pan,Hong Ma,Rongning Zhang,Ran Deng,Meng Li,Binfei Yang,Ruiying Zhu,Li Zhao,Yong Liu,Xiaobo Gong
In this study, a manganese co-doped with phosphorus and nitrogen pigeon guano-derived biochar catalyst (Mn/PN-PGC) was constructed for the rapid removal of tetracycline hydrochloride (TC) by activated periodate (PI). The results show that the Mn/PN-PGC materials obtained after Mn doping have increased defects and a higher specific surface area, resulting in more PI catalytic active sites. At room temperature, 0.1 g·L −1 of Mn/PN-PGC and 0.1 g·L −1 of PI could achieve 92.2 % TC removal efficiency with a rate constant of 0.257 min −1 . The removal of TC remained above 84.32 % over a wide pH range. EPR tests, quenching experiments, probe experiments and electrochemical tests demonstrated the mechanism of the synergistic degradation of TC by radical (IO 3 •/•O 2 − /•OH) and non-radical of electron transfer. Additionally, the ecotoxicity was reduced after treatment with the Mn/PN-PGC/PI system, with no toxic reactive iodine production detected. The resourceful utilization of agricultural wastes in this study can alleviate the problem of agricultural waste management, promote sustainable practices, and ultimately facilitate the evolution of advanced and sustainable methods for the remediation of antibiotics in wastewater.
研究领域:
环境科学
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材料科学
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污染控制
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高影响因子
危险品化学品经营许可证（带存储）