COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Jiawei Zhao,Li Lu,Sitong Ye,Jiali Shentu,Yuyang Long,Dongsheng Shen,Min Zhu,Shengqi Qi,Dong Zhang,Jörg Rinklebe
The adsorption of organic pollutants onto plant root surfaces is an initial crucial stage in the transfer of these pollutants from aqueous or soil solutions to plant systems. This study explored the potential influence of micro- and nano-plastics (MNPs) (0.1–100 μm) on the process of phenanthrene (Phe) adsorption at the root–water interface. The findings indicate that MNPs can exhibit either promotional or inhibitory effects on the root adsorption of organic pollutants, depending on both their particle size and content. Specifically, both the sorption capability of MNPs for Phe and their tendency to accumulate on or within root tissues increase with decreasing particle size. These dual effects facilitate the accumulation of nanoscale MNPs (0.1–6 μm in this work) within roots, which function as efficient carriers for Phe and increase Phe accumulation in root tissues. In contrast, MNPs with larger particle sizes (1–100 μm in this work) exhibit reduced affinity for roots and are more prone to remain in solution, thereby exerting more pronounced competitive inhibition against the adsorption of Phe by roots. However, when the concentration of nano-plastics in the root water system exceeded the retention capacity of the roots, the excess nano-plastics could compete with the roots for Phe, potentially reducing overall Phe sorption by the roots. These conditional effects of MNPs as either competitors or facilitators (vectors) in the root adsorption processes of organic pollutants may account for the different roles observed in previous studies where MNPs exhibited varying effects on the plant accumulation of organic pollutants.
研究领域:
环境科学
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植物学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
·
IF 4
Qing Wang,Xue Ren,Shao-Feng Tang
Background Limits on ametryn and benzo[a]pyrene in tea beverages are becoming more stringent. To enhance detection efficiency and reduce analysis costs, it is critical to develop mixed-mode extractants for these two analytes with substantial differences in properties concurrently. Biochar (BC) is increasingly being used in the preparation of mixed-mode adsorbents, but there is a challenge in balancing adsorption capacity against adsorption rate. Therefore, it is of great significance to explore mixed-mode adsorbents that can simultaneously adsorb or extract analytes with different properties, such as ametryn and benzo[a]pyrene, and achieve rapid adsorption or extraction. Results The shells of Zizyphus jujuba seeds were used to synthesize K-H-BC, a three-dimensional hierarchical porous BC with a wide range of oxygen-containing functional groups. The synthesis technique included KOH activation and modification using a 1:3 vol ratio of HNO 3 /H 2 SO 4 . K-H-BC's mixed-mode adsorption properties resulted in various interactions with ametryn and benzo[a]pyrene. It exhibited rapid adsorption rates for ametryn and benzo[a]pyrene (reaching equilibrium in 15 min and 5 min, respectively) as well as high adsorption capacities (487.64 mg g −1 and 133.16 mg g −1 , respectively). Using K-H-BC as a dispersed solid-phase extraction adsorbent, combined with high performance liquid chromatography, a method for simultaneously detecting the two analytes in tea beverages was established. Ametryn displayed a linear range of 2–500 μg L −1 with a limit of detection of 0.20 μg L −1 , while benzo[a]pyrene showed a linear range of 25–500 μg L −1 with a limit of detection of 2.12 μg L −1 . Significance and novelty It provides a solution to the problem of high hydrophobicity in KOH-activated BC by modifying it with mixed acids. K-H-BC possesses a three-dimensional hierarchical porous structure and abundant surface oxygen-containing functional groups, allowing it to retain high adsorption capacity during rapid adsorption while co-adsorbing and co-extracting analytes with significantly different properties. This research provides a reference for using BC in sample pretreatment and the comprehensive utilization of non-medicinal parts of Zizyphus jujuba .
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
Antioxidants
·
2025
·Vol. 14
·期 4
·474
·
IF 6.6
Jun Hu,Ji Feng,Yan Bai,Zhi-Sheng Yao,Xiao-Yu Wu,Xin-Yu Hong,Guo-Dong Lu,Kun Xue
Background: Sucralose and benzo(a)pyrene (B[a]P) are widespread foodborne substances known to harm human health. However, the effects of their combined exposure on kidney function remain unclear. This study aimed to investigate the mechanisms by which sucralose and B[a]P induce kidney injury through P-glycoprotein (PGP/ABCB1), a crucial protein involved in cellular detoxification. Methods: C57BL/6N mice were co-treated with sucralose and B[a]P for 90 days to evaluate their impact on kidney histopathology and function. In vitro experiments assessed cell viability, reactive oxygen species (ROS) levels, and B[a]P accumulation by flow cytometry. Molecular docking and cellular thermal shift assay (CETSA) were used to determine the binding affinity of sucralose to PGP. Furthermore, PCR, Western blotting, and immunohistochemistry were performed to analyze the expression of PGP and its upstream transcription factors. Results: Ninety days of co-exposure to sucralose and B[a]P significantly exacerbated renal dysfunction in mice, as evidenced by the elevated level of serum creatinine and urea nitrogen, which could be reverted by ROS scavenger N-acetyl cysteine (NAC). In vitro, sucralose promoted cellular accumulation of B[a]P, consequently enhancing B[a]P-induced cell growth inhibition and ROS production. Consistently, B[a]P accumulation was enhanced by PGP knockdown in both HK2 and HEK-293 cells. Mechanistically, sucralose can directly bind to PGP, competitively inhibiting its efflux capacity and increasing intracellular B[a]P retention. Prolonged co-exposure further downregulated PGP expression, possibly through the reductions of its transcriptional regulators (PXR,NRF2, andNF-κB). Conclusions: Co-exposure to sucralose and B[a]P exacerbates renal injury by impairing PGP function. Mechanistically, sucralose inhibits PGP activity, resulting in the accumulation of B[a]P within renal cells. This accumulation triggers oxidative stress and inhibits cell growth, which demonstrates that sucralose potentiates B[a]P-induced nephrotoxicity by directly inhibiting PGP-mediated detoxification pathways, thus underscoring the critical need to evaluate toxicity risks associated with combined exposure to these compounds.
研究领域:
毒理学
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分子生物学
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医学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
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2018
·Vol. 9
·期 35
·4468-4475
·
IF 4.927
Chang Cheng,Xunchang Wang,Yaoyao Lin,Luying He,Jia-Xing Jiang,Yunfeng Xu,Feng Wang
The development of highly efficient organic photocatalysts for water splitting into hydrogen is one of the key challenges in materials chemistry. Herein, we have designed and synthesized a series of conjugated polymers with either a one- or three-dimensional framework consisting of pyrene and benzothiadiazole with different numbers of fluorine substitutions (0 or 2). The effect of molecular structure and fluorine substitution on their catalytic activity was investigated. It was found that the linear non-fluorinated polymer L-PyBT exhibited the highest hydrogen evolution rate up to 83.7 μmol h−1 under visible light irradiation among the prepared polymers because of its broad light absorption, suitable energy bandgap, and enhanced charge generation and separation process.
研究领域:
材料化学
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光催化
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能源材料
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高分子化学
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光功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xiaotong Shen,Jian Zhang,Huijun Xie,Bo Sun,Shuang Liang,Haiming Wu,Zhen Hu,Huu Hao Ngo,Wenshan Guo,Jiaxing Lu
Mn oxides could realize persistent organic pollutants (POPs) removal through the cycle of Mn between Mn(II) and biogenic Mn oxides in constructed wetlands (CWs) filled with Mn oxides. However, the inefficient cycle of Mn caused by the limited oxidation ability of Mn oxides inhibited its effective degradation of POPs. Ruthenium (Ru) and 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS) could act as electron shuttles in catalytic Mn oxides oxidation process. In this study, phenanthrene (PHE) was selected as a typical POP and biochar (BC) supported Ru (Ru/BC) and ABTS (ABTS/BC) were induced in CWs with Mn oxides (birnessite). The removal efficiencies of PHE in CWs with Ru/BC and ABTS/BC reached 94.61% and 95.51%, higher than the control (79.91%). ABTS performed best for enhancing Mn cycle based on the results of highest oxidation removal capacity and relative abundance of Mn-oxidizing bacteria. What’s more, the addition of Ru/BC contributed to the best adsorption ability and highest relative abundance of PHE degrading bacteria.
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
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Xiupeng Yue,Yongping Shan,Wentao Jiao,Kai Shen,Yaping Zhang
Electrokinetic (EK) delivery followed by thermal activated peroxydisulfate (PS) has turned out to be a potential in situ chemical oxidation technology for soil remediation , but the activation behavior of PS in an electrical coupled thermal environment and the effect of direct current (DC) intervention on PS in heating soil has not been explored. In this paper, a DC coupled thermal activated PS (DC-heat/PS) system was constructed to degrade Phenanthrene (Phe) in soil. The results indicated that DC could force PS to migrate in soil, changing the degradation rate-limiting step in heat/PS system from PS diffusion to PS decomposition, which greatly accelerated the degradation rate. In DC/PS system, 1 O 2 was the only reactive species directly detected at platinum (Pt)-anode, confirming that S 2 O 8 2- could not directly obtain electrons at the Pt-cathode to decompose into SO 4 •- . By comparing DC/PS and DC-heat/PS system, it was found that DC could significantly promote the conversion of SO 4 •- and •OH generated by thermal activation of PS to 1 O 2 , which was attributed to the hydrogen evolution caused by DC that destroys the reaction balance in system. It was also the fundamental reason that DC leaded to the reduction of oxidation capacity of DC-heat/PS system. Finally, the possible degradation pathways of phenanthrene were proposed on the basis of seven detected intermediates.
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
PubMed
高影响因子
MACROMOLECULAR BIOSCIENCE
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2014
·Vol. 14
·期 12
·1748-1754
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IF 3.65
Haisheng Wang,Wei Yu,Wenbo Zhang,Changyou Gao
The amphiphilic pyrene-containing random copolymers with pH-sensitive hydrazone bonds are synthesized by copolymerizing hydrophobic pyrene-containing methacrylhydrazone with hydrophilic N , N -dimethylacrylamide. The hydrolysable copolymers form spherical micelles at pH 6, which are further transformed into pure 1-pyrenecarboxaldehyde nanorods due to cleavage of the hydrazone bonds. Likewise, the shape transformation is observed under pH 5.5 phosphate buffered saline. Moreover, the hydrolysable micelles being co-cultured with A549 cells cause higher cytotoxicity than the non-hydrolysable ones without shape transformation, which are synthesized by reducing the hydrazone bonds with NaHB 4 .
研究领域:
材料科学
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生物医学工程
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2015
·Vol. 31
·期 2
·224-227
·
IF 0.875
Zhang Ran,Xu Lihua,Chen Hui,Qin Zhihong,Zhao Yu,Ni Zhonghai
1-Thiohydroxypyrene( 1 ) and its two intermediates, 1-pyrenyl- O -thiocarbamate( 2 ) and 1-pyrenyl- S -thiocarbamate( 3 ), were synthesized using 1-hydroxypyrene as the starting material. The key synthetic step is Newman-Kwart rearrangement. The results indicate that the Newman-Kwart rearrangement is more effective in suitable solvent than conventional method based on pure organic compound. The structures of compounds 1 – 3 were characterized by FTIR, NMR, GC-MS and elementary analysis. The crystal structures of two new compounds( 2 and 3 ) were determined by single crystal X-ray diffraction analysis. The whole synthetic process is simple, mild and with high yield.
研究领域:
有机化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Long Li,Jibran Iqbal,Hui Li,Yuan Zhang,Lin Sun,Ying Zhu,Wanchao Chen,Yongqing Xi,Ting Wu,Yiping Du
A device was designed integrating solid phase extraction (SPE) and in situ optical detection techniques. A chip assembled in the device to carry out SPE was enclosed in a fully reflective aluminum box to avoid loss of radiation flux in the optical measurement. The spectrum was measured on the SPE material directly after SPE. The device offers simple analytical operation without any elution step comparing with the traditional analytical methods with complicated procedures. The device and the developed analytical technique was used for the determination of rhodamine B and benzo[ a ]pyrene with UV–visible diffuse reflectance and solid phase fluorescence spectroscopies, respectively. Under optimal conditions, standard curves of rhodamine B and benzo[ a ]pyrene showed a linear relationship in concentration ranges of 10–800 μg L -1 (R 2 = 0.99) and 0.07–3.33 μg L -1 (R 2 = 0.99), respectively. The limit of detections (LOD) were 7 μg L -1 and 0.02 μg L -1 . The proposed device was successfully employed to quantify rhodamine B and benzo[ a ]pyrene in tap water samples. The results showed that the recoveries were 90–105% and the relative standard deviations (RSDs) were 2.53–5.55%, indicating that the device and analytical method is capable of trace analytes for rapid quantitative analysis in various samples.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Yao Tang,Jibo Dou,Zhijiang Lu,Jianming Xu,Yan He
The sluggish Fe 3+ /Fe 2+ cycle was the rate-limiting step in the Fenton-like reaction, and metal-free carbonaceous materials are considered as emerging alternatives to solve this problem. However, the effect of carbon material properties on the distribution of reactive species remains poorly understood. This study investigated the possibility and mechanism of using biochar to accelerate the Fe 3+ /Fe 2+ cycle to overcome the low efficiency of Fe 3+ /persulfate (PS) catalytic oxidation of phenanthrene . More importantly, the contribution of reactive species in the reaction systems with the variation of biochar pyrolysis temperatures was quantitatively studied. The results showed that medium-temperature derived biochar (BC500) had the greatest ability to enhance the Fenton-like system compared to the low- and high-temperature (BC350/700), and the first-order rate constant achieved 5.2 and 35.7-fold increase against the biochar/PS and Fe 3+ /PS systems, respectively. Using electrochemical evidence, sulfoxide probe tests, and steady-state concentration calculations, radicals yields were found to rise and then reduce with decreasing pyrolysis temperature, while the nonradical contribution of Fe(IV) increased to 56.3%. Electron paramagnetic resonance, Boehm titration, and Raman spectroscopy unraveled that the enhanced effect of biochar resulted from itself persistent free radicals, phenolic-OH, and edge defects, which enabled electron transfer between Fe 3+ and biochar. Fe 2+ was thus continuously generated and effectively activated the PS. This work enables a better understanding of the Fe 3+ -mediated Fenton-like reaction in the presence of biochar and provides a sustainable green strategy for Fenton chemistry with potential applications.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Shuai Guo,Chaoxian Wei,Yaxian Zhu,Yong Zhang
Plant leaf cuticles play a critical role in the accumulation and transport of atmospheric polycyclic aromatic hydrocarbons (PAHs). The relationship between the distribution and retained amount of PAHs on the leaf cuticles and the leaves micro-zone structures is still unclear. In this study, a confocal microscopic fluorescence spectral analysis (CMFSA) system with a spatial resolution of 200 nm was established as a direct and noninvasive means to determine the microscopic distribution and quantify the retained amount of benzo[a]pyrene (B[a]P) at Aegiceras corniculatum ( Ac ), Kandelia obovata ( Ko ) and Avicennia marina ( Am ) leaf cuticle micro-zones (0.096 mm 2 ). The linear ranges for the established method were 10–1900 ng spot −1 for Ac , 15–1700 ng spot −1 for Ko and 30–1800 ng spot −1 for Am , and the detection limits were 0.06 ng spot −1 for Ac , 0.06 ng spot −1 for Ko and 0.07 ng spot −1 for Am . Notably, B[a]P formed clusters and unevenly distributed at the leaf cuticles. On the adaxial cuticles, B[a]P was mainly accumulated unevenly along the epidermis cell wall, and it was also distinctively distributed in the secretory cells around salt glands for Ac and Am . On the abaxial leaf cuticles, B[a]P was concentrated in the salt glands and stomata apart from being unevenly distributed in the epidermis cell wall. Moreover, the amount of B[a]P retained presented a negative correlation with the polarity of leaf cuticles, which resulted in the amount of B[a]P retained on the adaxial leaf cuticles being significantly higher than that on abaxial leaf cuticles. Our results provide a potential in situ method for investigating the distribution and retained amount of PAHs at plant leaf surface micro-zones, which would contribute to further studying and understanding the mechanism of migration and transformation of PAHs by plant leaves from a microscopic perspective.
研究领域:
植物学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 35
·e54351
·
IF 3
Guanhao Ma,Jiangyu Luo,Jinqing Qu
Two new photoinitiators of acyldiphenylphosphine oxides carrying triphenylamine (NHPO) or pyrene group (BHPO) were designed and synthesized with diphenylphosphine oxide reacting with 4-(diphenylamino) benzaldehyde or 1-pyrenecarboxaldehyde. The solubility of NHPO is about 13.7 wt% in TMPTA, which is higher than that of (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO) (about 12.5 wt%). The UV–Vis spectrum of NHPO and BHPO revealed that their maximum absorption wavelengths have redshifted to 397 and 419 nm, respectively, with a molar extinction coefficient of around 19,057 and 24,257 M −1 cm −1 , suggesting that they are likely to be effective photoinitiators when exposed to light from LEDs. According to real-time Fourier transform infrared spectroscopies, the degree of double bond conversion of NHPO reached 65%, which was higher than that of TPO (about 45%), showing that NHPO had substantially better photoinitiated properties than TPO. Using steady-state photolysis and electron spin resonance spin-trapping studies, the photocuring mechanism was examined, and it was discovered that the NHPO and BHPO had produced two free radicals. Additionally, NHPO exhibited superior biocompatibility performance as demonstrated by cytotoxicity assays and had a low migration rate of only 0.23%, as determined by migration. As a result, NHPO might be utilized in coatings for food packaging.
研究领域:
材料化学
·
光化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）