JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2024
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IF 2.8
Peng Wang,Qiuliang Xu,Hua Zou,Ming Liu,Xiangjing Gao,Hong Ren,Junlin Wang,Yiyao Cao
Accurate, reliable, and sensitive methods for the determination of eight metabolites of p-chloronitrobenzene (p-CNB) were developed based on ultra-performance liquid chromatography − quadrupole − orbitrap high resolution mass spectrometry (UPLC-Q-Orbitrap HRMS). The free and conjugated forms of metabolites were determined before and after urine samples were hydrolyzed with acid. Subsequently, three solid phase extraction steps were used for concentration and purification. The calibration curves of the eight metabolites exhibited good linearity with an R 2 of >0.999, and the precision was good as well, with the coefficient of variations of intra-day and inter-day being lower than 7.0 % and 8.5 %, respectively. Analytical accuracy for all metabolites varied within ranges of 76.0–102.9 %, and the limit of detection and limit of quantification of all the metabolites varied within ranges of 0.2–7.7 μg/L and 0.6–25.6 μg/L in human urine, respectively. In addition, the application potential of the proposed methods were evaluated by applying them to the determination of metabolites in the urine of workers exposed to p-CNB, and these results showed that these methods were accurate, reliable, and sensitive, which makes them an excellent choice for detecting the metabolites of p-CNB in the urine of exposed workers.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2017
·Vol. 24
·期 19
·16220-16227
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IF 2.741
Xu Xiangyang,Gao Xinyi,Jin Jie,Vidonish Julia,Zhu Liang
A novel laboratory-scale bioelectrode and anaerobic sludge coupled system was established for the enhancement of p -chloronitrobenzenes ( p -ClNB) reductive transformation with addition of magnetite nanoparticles. In this coupled system, the bioelectrodes were supplied with a voltage of 0.8 V and the amount of magnetite nanoparticles was set at 7.4 mL/400 mL. Results showed that high p -ClNB transformation rate of 0.284 h −1 and high p -chloroaniline ( p -ClAn) dechlorination rate of 0.082 h −1 were achieved in the coupled system at p -ClNB initial concentration of 30 mg L −1 , and p -ClAn is one of the reductive products of p -ClNB. The cyclic voltammetry curve showed that when the potential was −1000 mV, the magnetite-biocathode current was about 10.7 times of the abiotic cathode. Also, a shift in the reductive peak potential and a dramatic increase in reductive peak current were observed. These findings suggest that magnetite nanoparticles could enhance the electrocatalytic activity and may act as electron conduits between microorganisms or between electrodes and microorganisms to promote the extracellular electron transfer.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yang Liu,Jian Li,Jiawei Liu,Changwei Tang,Quan Bai
Metal-organic frameworks (MOFs) are promising packing materials in liquid chromatography, but their micropore character extremely prevents the separation performance. Herein, we proposed an acidic etching strategy to fabricate a hierarchically porous University of Oslo-66 (HP-UiO-66) coated silica shell-core composite by using phosphoric acid as an etchant. The prepared composite, namely HP-UiO-66@silica-PA, was characterized by SEM, TEM, FT-IR, and N 2 -adsorption–desorption isotherms, demonstrating the generation of mesopores in HP-UiO-66 shell with pore width ranging in 4–5 nm. The chromatographic performance of HP-UiO-66@silica-PA-1 (etched by 1 mL phosphoric acid for 2 h) as HPLC stationary phase was evaluated in reversed-phase mode, and the separations of three groups of small solutes were studied and compared with the microporous UiO-66@silica (MP-UiO-66@silica) column. The results proved the obviously improved performances with narrower peak width, better resolution, and higher symmetry were achieved by the HP-UiO-66@silica-PA-1 column. The faster diffusion and mass transfer kinetics in the HP-UiO-66 shell signally reduce the plate height and improve the column efficiency. Specifically, the plate number of o -xylene was 18,442 plates m −1 , which was about 18.5 times higher than that on the MP-UiO-66@silica column (993 plates m −1 ). Furthermore, good repeatability and reproducibility with RSDs of both retention time and peak area less than 0.5 % confirmed the high stability and outstanding reliability of the HP-UiO-66@silica-PA-1 column. This study demonstrates that the phosphoric acid etching strategy is simple, mild, and controllable to fabricate hierarchically porous MOFs-based stationary phase for enhancing the HPLC separation performance.
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BIORESOURCE TECHNOLOGY
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2018
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IF 5.807
Linlin Chen,Junjie Shao,Hui Chen,Caiqin Wang,Xinyi Gao,Xiangyang Xu,Liang Zhu
For enhanced dechlorination of 2,4-dichloronitrobenzene (2,4-DClNB), a coupled microbial electrosynthesis-upflow anaerobic sludge reactor (MES-UASB) was established, and the effect of cathode potential on the performance of combined process was investigated in this study. Results showed that a higher dechlorination efficiency of 78.5 ± 6.1% was achieved in the coupled MES-UASB at −660 mV, and the degradation rate of 4-chloroaniline (4-ClAn) reached 4.61 mg·L −1 ·d −1 within 120 h at −660 mV of cathode potential in batch experiments. The results of Illumina sequencing indicated that the biocathode operated at a lower potential favored the enrichment of dechlorination-related microbes such as Dehalobacter , Dehalococcoides and Anaeromyxobacter both in granular sludge and cathode biofilm. It could be speculated that a lower cathode potential is more feasible for the dechlorination of 2,4-DClNB due to the enrichment of dechlorination-related microbes as well as the production of electrons with higher energy for long-distance electron transfer (LDET).
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JOURNAL OF CHROMATOGRAPHY A
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2024
·
IF 3.8
Yali Yang,Jia Chen,Xiaojing Liang,Bei Liu,Kaijun Quan,Xiuhui Liu,Hongdeng Qiu
In this paper, three imidazole- and C18- bifunctional silica stationary phases (Sil-Im-C18) were prepared by adjusting introduction interval of octadecyltrichlorosilane (ODS) and 3-imidazol-1-ylpropyl(trimethoxy)silane (TMPImS), which can be used for reversed-phase liquid chromatography (RPLC) and ion exchange chromatography (IEC) with adjustable performance. The successful preparation of Sil-Im-C18 were confirmed by the characterizations of elemental analysis, infrared spectroscopy (FTIR) and contact angle (CA). Chromatographic performance of Sil-Im-C18 were evaluated by the separation of Tanaka test mixture, alkylbenzenes, linear PAHs and a set of analytes with different properties (uracil, phenol, 1,2-dinitrobenzene and naphthalene), and compared with commonly used C18 column. It was found that the chromatographic performance of Sil-Im-C18 changed significantly with the difference in bonding amount of imidazole and C18. Sil-Im-C18 demonstrated the excellent separation performance towards polycyclic aromatic hydrocarbons (PAHs), phenylesters, phenylamines , phenols and inorganic anions, and notably, nucleobases and nucleosides can be separated using pure water as mobile phases . The van Deemter plot showed that the column efficiency of Sil-Im-C18-3 was 64,933 plate· m − 1 for naphthalene, indicated that Sil-Im-C18 was reasonably chromatographic columns. The RSD values of retention time were 0.22 %-0.61 % for 10 needles alkylbenzenes injected continuously at 50 °C to investigate thermal stability and repeatability, all the fluctuations of k of naphthalene were less than 2.3 % for Sil-Im-C18-1 during flushing 24 h with the mobile phase at different pH values (pH = 3 and 8), the retention time of alkylbenzenes were almost same for Sil-Im-C18-1 at different time, the RSD values of retention time of alkylbenzenes were 0.45 %-2.28 % for two batches Sil-Im-C18-1, revealing the excellent repeatability, thermal stability, durability and reproducibility of Sil-Im-C18, and implying a commercial prospect.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Changjin Ou,Sujuan Yuan,Fujii Manabu,Ke Shi,Mohamed Elsamadony,Juntong Zhang,Juan Qin,Jian Shi,Zhipeng Liao
Anaerobic biotechnology for wastewaters treatment can nowadays be considered as state of the art methods. Nonetheless, this technology exhibits certain inherent limitations when employed for industrial wastewater treatment, encompassing elevated substrate consumption, diminished electron transfer efficiency, and compromised system stability. To address the above issues, increasing interest is being given to the potential of using conductive non-biological materials, e,g., iron sulfide (FeS), as a readily accessible electron donor and electron shuttle in the biological decontamination process. In this study, Mackinawite nanoparticles (FeS NPs) were studied for their ability to serve as electron donors for p -chloronitrobenzene ( p -CNB) anaerobic reduction within a coupled system. This coupled system achieved an impressive p -CNB removal efficiency of 78.3 ± 2.9% at a FeS NPs dosage of 1 mg/L, surpassing the efficiencies of 62.1 ± 1.5% of abiotic and 30.6 ± 1.6% of biotic control systems, respectively. Notably, the coupled system exhibited exclusive formation of aniline (AN), indicating the partial dechlorination of p -CNB. The improvements observed in the coupled system were attributed to the increased activity in the electron transport system (ETS), which enhanced the sludge conductivity and nitroaromatic reductases activity. The analysis of equivalent electron donors confirmed that the S 2- ions dominated the anaerobic reduction of p -CNB in the coupled system. However, the anaerobic reduction of p -CNB would be adversely inhibited when the FeS NPs dosage exceeded 5 g/L. In a continuous operation, the p -CNB concentration and HRT were optimized as 125 mg/L and 40 h, respectively, resulting in an outstanding p -CNB removal efficiency exceeding 94.0% after 160 days. During the anaerobic reduction process, as contributed by the predominant bacterium of Thiobacillus with a 6.6% relative abundance, a mass of p -chloroaniline ( p -CAN) and AN were generated. Additionally, Desulfomonile was emerged with abundances ranging from 0.3 to 0.7%, which was also beneficial for the reduction of p -CNB to AN. The long-term stable performance of the coupled system highlighted that anaerobic technology mediated by FeS NPs has a promising potential for the treatment of wastewater containing chlorinated nitroaromatic compounds, especially without the aid of organic co-substrates.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
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IF 11.3
Xia Li,Jie Song,Yanji Jiang,Huimin Sun,Xianqiang Yin
Aniline compounds (ACs) and microplastics (MPs) are emerging contaminants that frequently co-occur in industrial wastewater and soil-groundwater systems. However, their co-transport mechanisms and in particular the role of MPs as carriers to enhance ACs transport remain unclear. This study employs adsorption and column experiments to systematically analyze the adsorption characteristics and mechanisms of polyacrylonitrile microplastics (PANMPs) for aniline and p-chloroaniline. It also examines the effects of key parameters, such as flow rates, pH, and IS, on the transport behavior of ACs in the presence of MPs, thereby offering new insights into their environmental fate. The adsorption experiments revealed that the adsorption of MPs onto ACs follows a multilayer physical adsorption mechanism, with enhanced adsorption capacity observed at lower pH and higher ionic strength (IS). Column transport experiments demonstrated that PANMPs significantly promote ACs migration. Notably, pH and IS modulated the co-transport behavior by altering the adsorption affinity between MPs and ACs, thereby enhancing the disparity in their transport behavior. Furthermore, the greater mobility of PANMPs with increasing flow rates led to a greater extent of ACs transport in the sand column. These findings are of great significance for understanding the transport behavior and fate of MPs and ACs in soil-groundwater.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhengkai Wu,Yunning Chen,Xueying Cheng,Renquan Guan,Shuyu Chen,Yingna Guo,Qingkun Shang
How to design and optimize the single-molecule structure of perylene diimide derivatives (PDIs) to obtain high-performance photocatalysts is one of the challenges facing the current research field of PDIs photocatalysis. In this article, we regulate the π-π self-assembly stacking and optoelectronic properties of PDIs by changing the type and position of substituents on the amide site. The PDI-PBA photocatalyst with excellent performance was obtained from seven types of PDIs supramolecular materials. Theoretical calculations and optoelectronic performance tests have shown that PDI-PBA has good crystallinity and maximum dipole moment, resulting in its maximum built-in electric field, effectively promoting the separation and transport of photo-generated carriers. The transient absorption spectra further indicate that photogenerated electrons and holes of PDI-PBA have outstanding separation efficiency and ultra-long lifetime. In the batch reactor, PDI-PBA can degrade almost 100% acetaminophen within 60 min. In the dynamic cycling system with a surface hydraulic load of 14.56 L/(m 2 ·h), the efficiency of PDI-PBA photocatalytic degradation of acetaminophen can reach 84%. PDI-PBA can also effectively degrade phenol, levofloxacin, and ciprofloxacin. This work provides a successful example for the design of novel and efficient PDIs supramolecular materials, and lays the foundation for the application of PDIs photocatalysts in practical wastewater treatment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Hong Meng,Junhui Zhou,Yongqing Zhang,Jiaqi Cui,Yu Chen,Wenye Zhong,Yan Chen,Charles Q. Jia
A non-radical persulfate oxidation system activated by biochar-supported single-Co-atom catalyst (CoNBC600) was explored in this work. The experimental data and density functional theory calculations showed the Co atom coordinated with three N atoms was the primary active site for peroxymonosulfate (PMS) activation, resulting in the formation of surface-bonded active complexes (CoNBC600-PMS*) and high-valent metal oxides. Acetaminophen (APAP) was completely degraded within 11 min through a nearly 100 % internal electron transfer process between CoNBC600-PMS* and APAP, with an outstanding specific rate constant of 15.33 min −1 g −2 L 2 . The CoNBC600/PMS system exhibited high selective degradation toward organic pollutants that have low half-wave potential and high levels of the highest occupied molecular orbital. The polyvinylidene fluoride supported CoNBC600 membrane sustained steady PMS activation in a continuous flow-through system. This work provides a comprehensive understanding of the activation process of PMS by the CoNBC600 and offers a pathway to developing practical Fenton-like systems for wastewater remediation.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Kaihua Pan,Weihao Zhu,Yanni Huang,Changchang Wang,Hongfei Liu,Qian Li,Qian Zhu,Junqiang Hu,Mingliang Zhang,Jiguo Qiu,Xin Yan,Qing Hong
3,5-Dichloroaniline (3,5-DCA) is extensively used in synthesizing dicarboximide fungicides, medical compounds and dyes. Due to its widespread use in agriculture and industry, 3,5-DCA is often detected in groundwater, wastewater, sediments and soil, posing great risk to animals and humans. However, the genes and enzymes involved in 3,5-DCA degradation remain unidentified. In this study, 3,5-DCA-degrading activated sludge was obtained through 90 days of alternating anaerobic-anoxic acclimation. Microbial community analysis and further study revealed that Dehalobacter sp. DH-1 (OTU10) can convert 3,5-DCA to 3-chloroaniline anaerobically. Pseudomonas sp. DCA-1 (OTU58) can degrade 3,5-DCA, 3-chloroaniline and 2,5-dichloroaniline aerobically. Two gene clusters, ddoA1A2A3A4 and ddoBCDE , responsible for 3,5-DCA degradation, were identified via transcriptome analysis and heterologous expression. The dioxygenase genes of cluster ddoA1A2A3A4 convert 3,5-DCA to 3,5-dichlorocatechol, while those of cluster ddoBCDE mineralize the latter. Ultimately, the iprodione-degrading gene cluster ipaH-ddaH-duaH (responsible for sequential hydrolysis of the dicarboximide fungicide iprodione to 3,5-DCA) was introduced into strain DCA-1 to construct a genetically engineered microorganism, named strain IHC-DCA-1, that is capable of completely degrading iprodione. This study reveals the degradation mechanism of 3,5-DCA and provides potential strains to remediate 3,5-DCA and iprodione in the environment.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Zhou-Yang Li,Min Li,Xue-Ning Zhang,Kun Zheng,Han-Bing Xiao,Ai-Jie Wang,Yi-Lu Sun
Triclocarban (TCC), a persistent antimicrobial compound widely present in municipal wastewater, poses potential risks to biological nitrogen removal processes. However, the potential risks posed by TCC to advanced treatment processes—particularly sulfur-metabolism biofilm reactor—remain poorly understood and require further elucidation. This study investigated the impact of TCC on sulfur-metabolism biofilm base on sulfur-metabolism biofilm reactor, focusing on nitrogen removal performance, TCC transformation pathways, and microbial community dynamics. The results showed that sulfur-metabolism biofilm maintained stable nitrogen removal efficiency under trace TCC (≤ 25 μg/L) stress with nitrate removal improved from 93 % to 98 %, whereas performance declined significantly at 100 μg/L, reducing nitrate removal to 81.8 ± 3.9 % and increasing effluent NO 2 ⁻-N and N 2 O-N by 6.0- and 28.0-fold, respectively. Functional predictions via FAPROTAX suggested TCC-induced alterations in sulfur and nitrogen metabolic pathways. In addition, TCC and its transformation intermediates (MCC, DCC, NCC, 3,4-DCA, 4-CA) accumulated in the biofilm. Network analysis revealed syntrophic interactions between sulfur-oxidizing bacteria (e.g., Sulfurisoma and Sulfuritalea ) and hydrogenase-rich TCC degraders (e.g., Unclassified Chloroflexi ). These findings highlight the potential of sulfur-metabolism biofilm to achieve simultaneous nitrogen removal and micropollutant transformation in low-carbon, sulfur-rich wastewater environments, offering a sustainable solution for advanced wastewater treatment systems.
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