Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zhenjun Xiao,Junlong Zhang,Yijie Lin,Kaixuan Zheng,Zili Lin,Mengyang Niu,Wanlin Lin,Yuchun Hong,Zhongyang Li,Ping Chen,Qingbin Song,Wenying Lv,Guoguang Liu
Developing new technologies to address emerging contaminants are urgently needed. To this end, a novel advanced oxidation system (US/CaSO 3 /PDS) utilizing ultrasound to activate persulfate (PDS) and calcium sulfite (CaSO 3 ) for the effective degradation of emerging contaminants was constructed in this study. The pseudo first-order kinetics constant of Phoxim (PHO) can reach 4.3 × 10 −2 min −1 in US/CaSO 3 /PDS system, revealing the prospects for the treatment of pollutants in water. Electron paramagnetic resonance spectra demonstrated that persulfate anion radicals, hydroperoxyl radicals, hydroxyl radicals, and singlet oxygen were produced in the system. Further, quenching experiments and reactive species probes were used to verify the chemical reaction mechanism of this novel system, and the experimental results highlight the key role of 1 O 2 in the degradation of pollutants thanks to the participation of oxygen. In addition, 11 main products in the PHO degradation process were identified by liquid chromatography-high-resolution precise mass spectrometry, and the possible degradation path of PHO in US/CaSO 3 /PDS system was proposed. US/CaSO 3 /PDS system had high pollutant removal efficiency against a variety of emerging pollutants and was applicable in real water matrix. This study provides a new scheme for the development of advanced oxidation technology based on PDS activation for the removal of refractory emerging pollutants in water.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
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2024
·
IF 3.9
Mengting Huang,Yuan Ma,Qianru Fan,Shunli Che,Jun Zhang,Shuquan Ding,Shuren Zhu,Xilei Li
Nanopolystyrene (NP) and phoxim (PHO) are pervasive environmental contaminants that pose a significant threat to the health of aquatic organisms, prompting widespread concern among researchers and the public alike. The hepatopancreas play important roles in the Chinese mitten crab ( Eriocheir sinensis ), such as digestion, absorption and detoxification. This study assessed the hepatopancreatic toxicity caused by the exposure of Eriocheir sinensis to environmentally relevant concentrations of NP and/or PHO. After a 21-day exposure period, NP (1.0 × 10 10 particles/L) and PHO (24 μg/L) exposure resulted in reduced number of blister-like, resorptive, and fibrillar cells and an elevation in lipid droplets within the hepatopancreas compared to the control group. Furthermore, trypsin and lipase activity decreased, amylase activity increased, and a significantly decrease in the expression of digestion-related genes, including CHT , CarL , and CarB , suggested impairment in both digestive and metabolic functions. The marked upregulation of key genes, including PPARγ , GYK , PEPCK , and SCD , as well as key metabolites such as 4-methylzymosterol-carboxylate, zymosterone, lathosterol, 7-dehydro-desmosterol, vitamin D2, 24-methylene-cycloartanol, 5-dehydroepisterol, and sitosterol in the lipid metabolic pathway, showed that the peroxisome proliferator-activated receptor (PPAR) and steroid biosynthesis signaling pathways were highly affected by exposure to NP and/or PHO. These findings indicated that exposure to NP and/or PHO might adversely affect the hepatopancreatic physiological homeostasis in E. sinensis by causing tissue damage and interfering with digestive and metabolic functions. Our results provide ecotoxicological insights into the effects of nanopolystyrene and/or phoxim exposure on the digestive function of Eriocheir sinensis .
研究领域:
环境科学
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生态毒理学
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分子生物学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Chao Ma,Shuilai Qiu,Bin Yu,Junling Wang,Chengming Wang,Wenru Zeng,Yuan Hu
Epoxy resins inherently suffer flammability and brittleness. Various approaches have been used to improve their fire safety or toughness, however, glass transition temperature ( T g ) is always deteriorated concomitantly. Herein, a novel hyperbranched poly(aminomethylphosphine oxide-amine) (HPAPOA) was synthesized from α -aminomethylation reaction of trihydroxymethylphosphine (THP) with piperazine before oxidation. THP was prepared from tetrakis(hydroxymethyl)phosphonium sulfate and barium hydroxide to avoid complex purification in the synthesized process. When HPAPOA was utilized as co-curing agent for epoxy resins, T g and impact strength of epoxy thermosets are improved due to the increased cross-linking density and the multiple toughening mechanisms. Simultaneously, fire safety include flame retardancy, smoke suppression and toxicity reduction is raised (except 1.0 wt% added). The condensed phase flame retardant mechanism is verified as increased char yield and protective and barrier effect of the formed char layer and the gas phase for release of phosphorus-containing species of HPAPOA. With as low as 3.0 wt% HPAPOA incorporated, epoxy thermoset achieved vertical burning V-0 rating with a limited oxygen index of 30.7%. The blowing-out effect for upgradation of vertical burning rating is elucidated. Moreover, the curing reactivity of epoxy systems is slightly changed and the reaction activation energy is elevated. The thermal decomposition temperature of epoxy thermoset diminishes. With 2.0 wt% HPAPOA added, tensile and flexural properties are improved and those with other contents are slightly depressed. The practical HPAPOA modified epoxy thermosets with obvious disadvantage conquered and higher T g can be used in industries for high-performance applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xinran Wang,Xufeng Zang,Xin Wang,Wenjie Zhang,Yishan Fang,Bo Cui
The common detection methods of phoxim mostly rely on the output mode of single signal, which is easily disturbed by complex environmental media and causes errors. Herein, in order to improve the reliability of detection, we developed a dual-mode detection strategy based on nanozyme for the detection of phoxim. Firstly, manganese-nitrogen co-doped carbon nanozyme (Mn@NC) with peroxidase-like activity was synthesized by one-step pyrolysis, which was used to construct in the luminol-H 2 O 2 electrochemiluminescence (ECL) system with molecularly imprinted polymer (MIP) technology. Among them, Mn@NC can act as a co-reaction promoter to catalyze H 2 O 2 to produce large amounts of hydroxyl radicals ( • OH), thereby significantly amplifying the cathode signal of luminol and improving the stability of the signal. Benefiting from the specific selection of phoxim by MIP, this molecularly imprinted electrochemiluminescence (MIECL) mode has considerable sensitivity and selectivity, with a low limit of detection (LOD) of 0.011 ng/mL (S/N = 3). Moreover, the • OH produced by Mn@NC-catalyzed H 2 O 2 oxidized the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxidized TMB (oxTMB). Taking advantage of the fact that the simultaneous presence of acetylcholinesterase (AChE) and acetylthiocholine (ATCh) inhibited the activity of Mn@NC. A sensitive and simple colorimetric pesticide sensing platform was constructed by combining the nanozyme with the TMB-H 2 O 2 system to achieve the colorimetric detection of phoxim, with the LOD as low as 1.27 ng/mL. The dual-mode sensor was successfully applied to the determination of phoxim in agricultural products with satisfactory results, showing its great potential in the monitoring of food hazards.
研究领域:
分析化学
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食品安全
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Lei Tan,Manli Guo,Jiean Tan,Yuanyuan Geng,Shuyi Huang,Youwen Tang,Chaochin Su,ChunChe Lin,Yong Liang
In spite of the high-brightness of perovskite quantum dots (QDs), their instability and sensitive to oxygen and moisture are still major challenges that obstruct their analytical applications. This work demonstrates the fabrication and application of perovskite CsPbBr 3 QDs embedded in a molecularly imprinted polymer (MIP) for specific and sensitive detection of phoxim in real samples. CsPbBr3 QDs were obtained via a simple and convenient hot injection method. Based on the chemical structure of phoxim, we designed and synthesized a siloxane functional monomer with multiple functional groups to allow various types of interactions with phoxim. Next, the MIP/QDs composites were synthesized by slowly hydrolyzing the organosilicon monomers in situ. The obtained MIP/QDs composites possessed excellent selectivity for phoxim, and the imprinting factor of the optimized MIP/QDs was 3.27. Compared with previous studies regarding the detection of organophosphorus pesticides, the MIP/QDs fluorescence sensor exhibited high sensitivity and specificity. Under optimal conditions, the fluorescence quenching of the MIP/QDs had a good linear correlation for phoxim in the concentration range of 5–100 ng/mL, and with a limit of detection of 1.45 ng/mL. Finally, the method was used for the detection of phoxim in potato and soil samples, achieving recoveries of 86.8–98.2%.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Lina Zhou,Yujuan Cao,Bixia Lin,Shuhua Song,Ying Yu,Lingling Shui
It is necessary to develop new detection methods of pesticide residues because pesticide residues endanger human health. In this study, a fluorescent immunoassay probe (PDs-Ab) was designed in order to establish an in-situ visual and ultrasensitive detection method of phosmet. PDs-Ab probe which could recognize phosmet was synthesized by coupling phosmet antibody with polymer dots (PDs) based on poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-(1-cyanovinylene-1, 4-phenylene)]. The experiment results showed PDs-Ab probe was used not only for fluorescent imaging but also for ultrasensitive detection of phosmet. The fluorescent imaging realized in-situ visual and semi quantitative detection of phosmet residues on apple surfaces. The ultrasensitive detection of phosmet utilized a poly (dimethylsiloxane) (PDMS) sheet. Phosmet and PDs-Ab probe were orderly loaded on PDMS sheet, and eluted by absolute ethanol. The fluorescence intensity of absolute ethanol eluant increased in proportion to the concentration of phosmet. The limit of detection for phosmet was 0.4 ng/L with a correlation coefficient of 0.9968. The PDMS sheet was served to concentrate trace phosmet and eliminate the fluorescence interference from excess PDs-Ab. Also, this method was used to monitor phosmet residues in real samples, such as lake water, orange peels and Chinese cabbage leaves, with acceptable recovery range from 97.15% to 102.1%.
研究领域:
环境科学
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分析化学
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食品安全
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2019
·Vol. 30
·期 7
·1684-1695
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IF 2.162
Jingshang Zhou,Miaojun Xu,Xiaohan Zhang,Yang Leng,Yintong He,Bin Li
The unsaturated polyester resins (UPR) were usually applied in electronic equipment, but the intrinsic flammability severely retrained their application. A mono-component flame retardant poly (piperazine methylphosphonic acid neopentylglycol ester) (PPMPNG) made in our lab was selected and applied to improve their flame retardant performance. The UPR thermosets achieved UL-94 V-0 grade during vertical burning tests and the limiting oxygen index was as high as 32.1% when 15 wt% PPMPNG was incorporated. PPMPNG promoted the decomposition and carbonization of UPR materials in advance during heating process, and the residual mass was effectively enhanced at high temperature. The flame retardant mechanism of UPR/PPMPNG thermosets was investigated by pyrolysis-gas chromatography/mass spectrometry tests, and the measurement of the morphologies and chemical components of the char residue. The phosphine oxygen radical was generated and then quenched the active free radicals in gas phase. Moreover, the av-EHC of FR-UPR was declined from 15.8 MJ kg −1 of pure UPR to 8 9 MJ kg −1 corresponding a reduction of 43.6%, which also verified the flame retardant effect in gas phase. The compact, integrated, and graphitized char layer was produced on materials surface and then exerted excellent barrier effect in condensed phase. Thus, the UPR/PPMPNG composites were conferred superior flame retardant properties.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
Food Bioscience
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2023
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IF 5.2
Wenhui Hao,Gengli Huang,Guoyong Jiang,Sa-adu Abiola Dauda,Fuwei Pi
To control and on-site evaluate the contamination of organophosphorus pesticides, one direct sensing approach based on spontaneous fluorescence resonance energy transfer (FRET) was developed in this study. The luminescent metal-organic frameworks (LMOFs), a novel achievement of MOFs, could provide adjustable adsorption capacity and fluorescence index to scientific analysis was first employed to evaluate phoxim molecules in vegetables and fruits. Through the π-π recognition and FRET sensing between phoxim molecules and skeleton of Nu-1000 LMOFs probes, an ultra-low detection limit of 1.65 pg/L in the range of 5×10 −7 to 5×10 −3 mg/mL ( R 2 =0.998) was achieved in the presence of phoxim. Such simple and accurate LMOFs- FRET-based sensing strategy could offer valuable reference for developing sensitive FRET sensors and/or on-site evaluation approaches in the areas of food quality control and food safety.
研究领域:
分析化学
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食品科学
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环境科学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2019
·Vol. 12
·期 9
·2094-2105
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IF 2.413
Yaseen Tehseen,Pu Hongbin,Sun Da-Wen
The sensitivity of surface-enhanced Raman spectroscopy (SERS) extremely relies on experimental parameters including pH and aggregating agents. Using Au@Ag nanoparticles (NPs) with 26 nm Au core size and 6 nm Ag shell thickness as the substrate, the effect of cationic (Ca 2+ , K + , Na + ) and anionic (Cl − , Br − ) aggregating agents was investigated on the SERS detection of phosalone. The optimum concentrations of the aggregating agents in relation to the maximum SERS intensity differed broadly from 1 × 10 −2 mol/L for CaBr 2 to 1 × 10 1 mol/L for KCl. Both anions and cations greatly affected the SERS enhancement. With employing Br − as the anion, Ca 2+ and K + showed the maximum SERS intensities for phosalone, while using Ca 2+ as the cation, Br − produced the maximum SERS enhancement. Among these aggregating agent combinations, the maximum SERS enhancement was achieved by employing 1 × 10 −2 mol/L CaBr 2 at pH 3.0. The detection limits of phosalone in standard solution and peach were 0.02 mg/L and 0.2 mg/kg, respectively. This study demonstrated that the Au@Ag NP-based SERS approach could be used as a sensitive, rapid, and simple method for detecting trace contaminants in food matrices.
研究领域:
分析化学
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食品科学
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纳米技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 8
·717
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IF 4.4
Pengxing Sha,Chushu Zhu,Tianran Wang,Peitao Dong,Xuezhong Wu
In this research, a method was developed for fabricating Au–Au nanorod array substrates through the deposition of large-area Au nanostructures on an Au nanorod array using a galvanic cell reaction. The incorporation of a granular structure enhanced both the number and intensity of surface-enhanced Raman scattering (SERS) hot spots on the substrate, thereby elevating the SERS performance beyond that of substrates composed solely of an Au nanorod. Calculations using the finite difference time domain method confirmed the generation of a strong electromagnetic field around the nanoparticles. Motivated by the electromotive force, Au ions in the chloroauric acid solution were reduced to form nanostructures on the nanorod array. The size and distribution density of these granular nanostructures could be modulated by varying the reaction time and the concentration of chloroauric acid. The resulting Au–Au nanorod array substrate exhibited an active, uniform, and reproducible SERS effect. With 1,2-bis(4-pyridyl)ethylene as the probe molecule, the detection sensitivity of the Au–Au nanorod array substrate was enhanced to 10−11M, improving by five orders of magnitude over the substrate consisting only of an Au nanorod array. For a practical application, this substrate was utilized for the detection of pesticides, including thiram, thiabendazole, carbendazim, and phosmet, within the concentration range of 10−4to 5 × 10−7M. An analytical model combining a random forest and a one-dimensional convolutional neural network, referring to the important variable-one-dimensional convolutional neural network model, was developed for the precise identification of thiram. This approach demonstrated significant potential for biochemical sensing and rapid on-site identification.
研究领域:
分析化学
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纳米技术
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机器学习
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环境科学
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产品关联
DOI
PubMed
高影响因子
AQUATIC TOXICOLOGY
·
2024
·
IF 4.1
Shuquan Ding,Shunli Che,Mengting Huang,Yuan Ma,Longteng Shen,Jianbin Feng,Xilei Li
Nanopolystyrene (NP) pollution in aquatic environments has become an increasing concern. Phoxim (PHO), one of the major organophosphorus pesticides, has also been detected in aquatic environments, posing serious health risks to crustaceans. This study aimed to assess the detrimental effects of NP and/or PHO exposure at environmentally relevant concentrations on the intestinal histopathology, intestinal microbiota, and metabolome of adult crabs ( Eriocheir sinensis ) for 21 days. Our study revealed significant histopathological abnormalities in the intestines. In all the exposure groups, there was a discovery of vacuolar degeneration occurring in epithelial cells. Additionally, the peritrophic membrane exhibited thinning after NP or PHO single exposure, while thickening was observed after co-exposure. Exposure to NP and/or PHO disrupted the intestinal microbiota homeostasis, as evidenced by the proliferation of pathogenic bacteria and suppression of beneficial bacteria. Notably, PHO exposure resulted in increased abundance of pathogenic bacteria ( Spiroplasma and Arcobacter ) and decreased abundance of beneficial bacteria ( Bacteroides ). Analysis of the metabolome revealed that exposure to NP and/or PHO led to alterations in the metabolic profile as well as several critical pathways. Among these, the upregulation of arachidonic acid metabolism, ABC transporters, and biosynthesis of amino acids was observed in both NP single exposure and co-exposure, while PHO single exposure downregulated these pathways. Additionally, NP and/or PHO exposure downregulated neuroactive ligand-receptor interaction. Spearman correlation analysis revealed that the significant reduction of some differentially expressed metabolites (DEMs) was potentially regulated by the low-abundance bacterial genera following exposure to NP and/or PHO. And these DEMs have a role in anti-inflammatory or antioxidant properties. Collectively, our results offer novel perspectives on the intestinal toxicity of crustaceans by NP and/or PHO at environmentally relevant concentrations.
研究领域:
环境科学
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毒理学
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水生生物学
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微生物学
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代谢组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）