BIOLOGY AND FERTILITY OF SOILS
·
2018
·Vol. 54
·期 7
·807-817
·
IF 3.808
Xiang Leilei,Song Yang,Bian Yongrong,Liu Guangxia,Herzberger Anna,Gu Chenggang,Jiang Xin,Wang Fang
To test whether manure amendment in soil reduces plant uptake of persistent organic pollutants, carrot ( Daucus carota L. ) was used as a model plant and 2,2′,4,4′-tetrabrominated diphenyl ether (BDE-47) was selected as a model persistent organic pollutant to conduct a pot experiment with contaminated soil amended by composted pig manure. The results showed that the concentration and bioconcentration factors (BCFs) of BDE-47 in the edible part of carrot significantly decreased from 229.7 ± 28.2 to 43.4 ± 20.4 ng g −1 and from 1.86 ± 0.5 to 0.15 ± 0.03, respectively, with increasing composted pig manure dose from 0 to 4%. Organic matter (OM) derived from composted pig manure played a dominant role in reducing persistent organic pollutant bioavailability in soil. Composted pig manure amendment and carrot cultivation jointly altered the bacterial community composition in soil, especially the rhizosphere. Rhizodegradation of BDE-47 was enhanced from 8.6 to 28.5% with increasing composted pig manure dose from 0 to 4%, corresponding to increased soil microbe diversity and polybrominated diphenyl ether-degrading bacteria ( Sphingomonas , etc.) abundance in the rhizosphere. This study is the first, to the best of our knowledge, to provide an effective agronomic strategy of manure amendment to reduce plant uptake and simultaneously enhance rhizodegradation of persistent organic pollutants in soil, and thus potentially reduce human health risks through dietary intake.
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NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 10
·4014-4021
·
IF 3.269
Fuchong Li,Yansheng Liu,Tianqiong Ma,Dianhong Xu,Xu Li,Guangbi Gong
Palladium nanoparticles (NPs) were applied for the hydrodechlorination of chlorophenols in contaminated water using H2 as a clean and sustainable reductant. In this study, a high-efficiency Pd-based catalyst (Pd/Fe3O4@C) was facilely synthesized and applied for the reduction of 4-nitrophenol and hydrodechlorination of 4-chlorophenol in an aqueous solution. Compared with most Pd-based catalysts, the Pd/Fe3O4@C nanocatalyst exhibits a higher catalytic performance. The well-dispersed Pd NPs were modified on the spherical carbon surface through coordination chemical bond. The superparamagnetic character of the Fe3O4 core enabled the Pd/Fe3O4@C nanocatalyst to be very easily separated and recovered from the reaction mixture. Thus, the nanocatalyst can be repeatedly used without significant weight loss. The high catalytic activity of the Pd/Fe3O4@C nanocatalyst indicates that noble metal nanoparticles supported on magnetic carbon sphere materials could act as promising catalysts and have potential applications in numerous Pd-based catalytic reactions.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Shasha Fang,Yue Geng,Lu Wang,Jun Zeng,Shimin Zhang,Yucheng Wu,Xiangui Lin
Polybrominated diphenyl ethers (PBDEs) are persistent pollutants that may undergo microbial-mediated debromination in anoxic environments, where diverse anaerobic microbes such as methanogenic archaea co-exist. However, current understanding of the relations between PBDE pollution and methanogenic process is far from complete. To address this knowledge gap, a series of anaerobic soil microcosms were established. BDE-47 (2, 2′, 4, 4′-tetrabromodiphenyl ether) was selected as a model pollutant, and electron donors were supplied to stimulate the activity of anaerobes . Debromination and methane production were monitored during the 12 weeks incubation, while obligate organohalide-respiring bacteria (OHRBs), methanogenic, and the total bacterial communities were examined at week 7 and 12. The results demonstrated slow debromination of BDE-47 in all microcosms, with considerable growth of Dehalococcoides and Dehalogenimonas over the incubation observed in most BDE-47 spiked treatments. In addition, the accumulation of intermediate metabolites positively correlated with the abundance of Dehalogenimonas at week 7, suggesting potential role of these OHRBs in debromination. Methanosarcinaceae were identified as the primary methanogenic archaea, and their abundance were correlated with the production of debrominated metabolites at week 7. Furthermore, it was observed for the first time that BDE-47 considerably enhanced methane production and increased the abundance of mcrA genes, highlighting the potential effects of PBDE pollution on climate change. This might be related to the inhibition of reductive N- and S-transforming microbes, as revealed by the quantitative microbial element cycling (QMEC) analysis. Overall, our findings shed light on the intricate interactions between PBDE and methanogenic processes, and contribute to a better understanding of the environmental fate and ecological implication of PBDE under anaerobic settings.
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ACS Omega
·
2024
·
IF 3.7
Weiming Gao,Dingwu Jiang,Yiming Zhang,Yao Li,Zhilong Xu,Runxi Han,Hao Tian,Hufei Dai,Qijing Lu,Cuiping Li
Detoxification of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with high efficiency and dynamic performance is challenging for a polymeric catalyst. Herein, a series of conjugated microporous polyanilines (CMPAs), capable of efficiently catalytically reducing 4-NP, were synthesized based on the Buchwald–Hartwig cross-coupling reaction mechanism. By adjusting the types of linkers and the molar ratios of linker to core, CMPAs with different Brunauer–Emmett–Teller (BET) specific surface areas and reduction degrees were obtained and used as the catalysts in reducing 4-NP. The ultrahigh catalytic reduction efficiency (K = 141.32 s–1 g–1, kapp = 0.00353 s–1) was achieved when using CMPA-3-0.7 as the catalyst (prepared with 4,4′-diaminodiphenylamine as the linker and a 0.7:1 molar ratio of linker to core). The catalytic reduction performance exhibited a strong correlation with the reduction degree and BET specific surface area of CMPAs. Furthermore, they also exhibit excellent cycling stability and dynamic performance. The coexistence of a microporous structure and high BET specific surface area endowed CMPAs with an increased number of catalytic active centers. The reversible redox transformation of CMPAs in the presence of NaBH4 and air enabled self-healing (the oxidation units in CMPAs were reduced to reduction units by NaBH4, and the newly generated reduction unit in CMPAs was subsequently oxidized to its original state by the O2 in the air), leading to the reduction reaction of 4-NP proceeded continuously and stably. The aforementioned factors resulted in the high efficiency of CMPAs for reducing 4-NP to 4-AP, enhancing the practical application prospects of CMPAs in the detoxification of 4-NP wastewater.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Jie Shi,Yuting Xiong,Junyan Li,Baolei Gao,Guangyan Qing,Qianying Sheng,Minbo Lan
Protein methylation has attracted increasing attention due to its significant regulatory roles in various biological processes. However, the diversity of methylation forms, subtle differences between methylated and nonmodified sites, and their ultralow abundances pose substantial challenges for capturing and isolating methylated peptides from biological samples. Herein, we develop a chromatographic method that utilizes 4-sulfonylcalix[4]arene (SC4A) as a mobile phase additive and Click-Maltose as the stationary phase to separate methylated/nonmethylated peptides through the adsorption of the SC4A-K(Me3) complex. By utilization of the interaction between calix[4]arene cavities and trimethylated lysine residues, methylated peptides could be specifically separated from peptide samples. This method significantly improves the signal-to-noise ratio (S/N), even in samples containing a 10-fold excess of bovine serum albumin (BSA) trypsin digests. Additionally, we successfully enriched 12 methylated peptides from histone digests. This study paves the way for the selective enrichment of lysine methylated peptides in post-translational modification proteomics (PTMs), enhancing both the capture efficiency and selectivity of methylated peptides and providing robust technical support for subsequent proteomics research.
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EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Faliang Luo,Juntao Ren,Chunyu Li,Yanming Hu,Guangyuan Zhou
A styrene derivative, 4-N,N-dimethylaminostyrene (MAS), serving as both catalyst and monomer was exploited in reversible complexation mediated polymerization (RCMP). Radical trap experiment and UV–vis spectroscopy analysis revealed that MAS as a catalyst could abstract iodine from iodine-containing compound to generate propagating radical species. Kinetic studies demonstrated that the polymerization of styrene in the presence of MAS proceeded in a “living”/controlled manner, affording polymers with controlled molecular weights and narrow molecular weight distributions. The livingness of the obtained polymer was confirmed by chain extension. Determined by water contact angle measurement, incorporation of MAS into the polymer led to the enhancement of surface energy. Moreover, using α,ω-bis(2-iodo-2-phenylacetoxy)-end functionalized cis -1,4-polyisoprene as a macroinitiator which was synthesized through cross-metathesis of cis -1,4-polyisoprene with cis -1, 4-bis(2-iodo-2-phenylacetoxy)-2-butene, the polymerization of styrene in the presence of MAS also exhibited typical features of “living”/controlled radical polymerization to yield polystyrene-block-polyisoprene-block-polystyrene.
研究领域:
高分子科学
·
材料科学
·
化学工程
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2014
·Vol. 302
·期 1
·123-130
·
IF 1.415
Sun Zhi-Zhong,Wei Hong-Yuan,Wang Guan-Quan,Zhou Zhi-Jun,He Jia-Heng,Wang Jing,Luo Shun-Zhong
[ 131 I]-5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin and [ 131 I]-5-(4-aminophenyl)-10,15,20-triphenylporphyrin ( 131 I-TPPOH and 131 I-TPPNH 2 ) were prepared and their biodistribution properties were evaluated in normal Kunming (KM) mice and SMMC-7721 tumor-bearing BALB/c mice. The optimized labeling yields were 98 and 96 % for 131 I-TPPOH and 131 I-TPPNH 2 , respectively. They were stable in vitro saline and in vivo. Both compounds had a specific affinity to liver and lung, and mainly metabolized through liver. They showed a time-dependent accumulation and retainable characteristics in SMMC-7721 tumor. These results supported their potential value for targeted tumor therapy agents.
研究领域:
放射医学
·
肿瘤学
·
药理学
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ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2017
·Vol. 643
·期 16
·1082-1087
·
IF 1.144
Chen Shen,Dajiang Mei,Chuanling Sun,Yunsheng Liu,Yuandong Wu
The selenites, Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 , were synthesized under hydrothermal conditions. The crystal structures of Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 were determined by single-crystal X-ray diffractions. Na 2 Be 3 (SeO 3 ) 4 · H 2 O crystallizes in the triclinic space group P 1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Å, and Z = 2, whereas Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 crystallizes in the monoclinic space group C 2/ m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Å, and Z = 2. Na 2 Be 3 (SeO 3 ) 4 · H 2 O features a three-dimensional open framework structure formed by BeO 4 tetrahedra and SeO 3 trigonal pyramids. Na cations and H 2 O molecules are located in different tunnels. Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 has a structure composed of isolated [Mg(H 2 O) 6 ] octahedra and SeO 3 trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in-between. Both compounds were characterized by thermogravimetric analysis and FT-IR spectroscopy.
研究领域:
无机化学
·
材料科学
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 15
·5801-5809
·
IF 4.569
Yuan Yuan,Yuangang Xu,Qiang Xie,Dongxue Li,Qiuhan Lin,Pengcheng Wang,Ming Lu
A series of cyclo-N5−-based lead-containing energetic coordination polymers [Pb(OH)]4(N5)4 (1), [Pb3(N5)3(H2O)9(NO3)]4(N5)8(H2O)5 (2), [Pb(OH)]4(N5)3(NO3)(H2O)3 (3), and [Pb(OH)]4(N5)3(ClO4)(H2O) (4) were synthesized by self-assembly and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, infrared and Raman spectroscopy, high resolution mass spectrometry, elemental analysis, scanning electron microscopy, and differential scanning calorimetry. In addition, their thermal decomposition kinetics have been studied theoretically and experimentally. The results revealed that the synthesized CPs possess regular structures, very high densities (2.852–4.537 g cm−3), good oxygen balances (CO2) (−2.72–+2.61%), good thermal stabilities (80–110 °C), and acceptable sensitivities (9.5–20 J; 120–240 N). This work will provide new inspiration for the development of cyclo-N5−-based coordination polymers and energetic materials.
研究领域:
化学
·
材料科学
·
能源科学
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hui Sun,Baoyang Lu,Xuemin Duan,Jingkun Xu,Liqi Dong,Xiaofei Zhu,Kaixin Zhang,Dufen Hu,Shouli Ming
The copolymerization of 2’-aminomethyl-3, 4-ethylenedioxythiophene (EDOT-MeNH 2 ) and 3, 4-ethylenedioxythiophene (EDOT) was successfully performed electrochemically in acetonitrile (CH 3 CN) containing tetrabutylammonium hexafluorophosphate (Bu 4 NPF 6 ) as the supporting electrolyte by direct anodic oxidation of the monomer mixtures. A series of experiments with different monomer feed ratios were carried out to investigate the influence of monomer feed ratio on the electrochemical copolymerization and the overall properties of the copolymer films. As-formed novel copolymers owned both the advantages of poly(2’-aminomethyl-3, 4-ethylenedioxythiophene) (PEDOT-MeNH 2 ) and poly(3, 4-ethylenedioxythiophene) (PEDOT), i.e ., good electrochemical behavior, excellent electrochemical stability, and good thermal stability. Spectroelectrochemistry analysis of copolymer with the feed ratio of 1:1 reflected λ max due to the π–π* transition and polaron band formation was found to be 620 nm and the band gap ( E g ) was calculated as 1.67 eV. The structure, thermogravimetry and morphology of the copolymers were investigated by infrared spectroscopy, thermal analysis, and scanning electron microscopy, respectively.
研究领域:
材料科学
·
高分子化学
·
电化学
·
导电聚合物
·
有机电子学
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Materials Research Express
·
2018
·Vol. 5
·期 8
·085313
·
IF 1.151
Lei Chen,Li Dai,Zhanxiong Li
The silk fabric was modified with 4-nonafluorobutyl-4'-azobenzol acrylate (NFBA) through atom transfer radical polymerization (ATRP). FT-IR and XPS were used to confirm the structures of the silk fabric before and after modification. The surface morphology was recorded by SEM and surface property was tested by contact angle (CA). The reversible isomerization of azobenzene on silk was observed by processing with UV and visible alternately. As a result, the reversible hydrophobicity-hydrophilicity transformation on silk fabric was successfully achieved by controlled grafting polymerization via ATRP.
研究领域:
材料科学
·
纺织工程
·
高分子化学
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REPRODUCTIVE TOXICOLOGY
·
2026
·
IF 3.4
Shenglin Peng,Jianping Huang,Kun Gao,Fengrong Nie,Zhen Peng,Yimin Cheng,Jin Hu
Growing evidence links environmental pollutant exposure to the deterioration of male reproductive health. In this study, the interactive toxicity between polystyrene nanoplastics (PS-NPs) and 3,3′,4,4′,5-pentachlorobiphenyl on human sperm functions were evaluated. Functional assays were performed on sperm in vitro from healthy volunteers treated separately or jointly with PS-NPs and PCB-126. Key endpoints—motility, cervical mucus-penetrating ability, capacitation, acrosome reaction, intracellular reactive oxygen species, and mitochondrial membrane potential—were significantly more impaired under co-exposure conditions than with individual treatments. Notably, combined treatment synergistically increased ROS accumulation, enhanced mitochondrial depolarization, and inhibited progesterone-stimulated capacitation and acrosome reaction of human sperm. The observed synergistic toxicity may be mediated through oxidative stress and disruption of mitochondrial function, leading to apoptotic-like changes. These results draw attention to the reproductive risks that may emerge from dual exposure to nanoplastics and stable organic environmental chemicals within the setting of idiopathic male infertility.
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