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Distribution and biomagnification of Hexabromocyclododecanes (HBCDs) in edible marine fish in the Beibu Gulf, China: Implication for seafood dietary risk

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MARINE POLLUTION BULLETIN 2024年 206卷 116737页

作者： Yang, Xi Huang, Liangliang Zhang, Li Zhu, Liang Cheng, Yanan Wang, Caiguang Kang, Bin zhao, shuwen Yang, Yiheng Guilin Univ Technol Coll Environm Sci & Engn Guilin 541004 Peoples R China Guilin Univ Technol Collaborat Innovat Ctr Water Pollut Control & Wate Guilin 541004 Guangxi Peoples R China Minist Nat Resources Inst Oceanog 4 Guangxi Key Lab Beibu Gulf Marine Resources Enviro Beihai Peoples R China Ocean Univ China Coll Fisheries Qingdao 266100 Shandong Peoples R China

Hexabromocyclododecanes (HBCDs) are legacy additive brominated flame retardant. In present study, the distribution, biomagnification and potential human health risk associated with HBCDs were investigated in six edible marine fish species collected from three bays in the Beibu Gulf, China, between March and October 2021. The concentration of HBCDs ranged from 0.05 to 200 ng/g lipid weight (lw), with Scoliodon laticaudus and Trichiurus nanhaiensis having the highest and lowest concentration, respectively. The alpha-HBCD was dominant in most studied fish, expect for Scoliodon laticaudus. Dietary source was the primary factor for the diastereomeric profiles of HBCDs in fish. Only gamma-HBCD demonstrated trophic magnification in the studied fish species. Finally, the estimated daily intake (EDI) was 0.18 ng/kg/day for adults, 0.17 ng/kg/day for teenager and children, and all corresponding margin of exposure (MOE) values were lager than 8 indicating relatively low human exposure risks from fish consumption.

关键词： HBCDs Biomagnification Marine fish Health risk assessment

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Plant cell wall inspired lignin-based membrane with configurable radical scavenging activity

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CHEMICAL ENGINEERING JOURNAL 2024年 495卷

作者： Li, Xupeng Wang, Hairong Li, Jialong Mao, Zijun Zhang, Shuo zhao, shuwen Li, Mingfei Hao, Xiang Peng, Feng Beijing Forestry Univ MOE Engn Res Ctr Forestry Biomass Mat & Energy Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China State Key Lab Efficient Prod Forest Resources Beijing 100083 Peoples R China

Natural antioxidants have received considerable attention due to their inherent biocompatibility and biodegradability, yet inferior antioxidant, storage instability, and structural heterogeneity limit applications. Drawing inspiration from plant structures, we develop antioxidant membranes that are entirely biomass-derived, metalfree, and customizable, using the layer-by-layer (LBL) assembly technique. The natural polyphenolic lignin coassembles with lauryl alcohol derived from cassia bark into macroporous spherical particles in a gamma-valerolactone (GVL)/water mixture, in which the pore size can be facilely adjusted by modulating feed ratio. Furthermore, the lignin nanospheres' free radical scavenging ability is greatly enhanced by enlarging the pore size, offering an alternative way to improve the antioxidant performance. As the hydrophilic shells of lignin spherical assemblies display a strong affinity towards holocellulose nanofibrils (HCNF), multilayered antioxidant membranes with stable mechanical strength are constructed. The entirely biomass-derived antioxidant membrane has proven effective in recycled antioxidative microfiltration applications, demonstrating more than 90 % scavenging activity over seven cycles. Moreover, it exhibits biodegradability even in harsh conditions, with temperatures below 280 K and relative humidity less than 30 RH%. This work illuminates new possibilities for applying natural antioxidants in precise control materials.

关键词： Lignin nanospheres Holocellulose nanofibrils Antioxidant membranes Radical scavenging Biodegradable

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Bias Analysis in the Simulation of the Western North Pacific Tropical Cyclone Characteristics by Two High-Resolution Global Atmospheric Models

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Advances in Atmospheric Sciences 2023年第4期40卷 634-652页

作者： Qiyang LIU Fengxue QIAO Yongqiang YU Yiting ZHU shuwen zhao Yujia LIU Fulin JIANG Xinyu HU Key Laboratory of Geographic Information Science Ministry of EducationEast China Normal UniversityShanghai 200241China School of Geographic Sciences East China Normal UniversityShanghai 200241China Climate Environment and Sustainability CenterSchool of Atmospheric ScienceNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Department of Atmospheric and Ocean Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081China

This study compares the atmosphere-only HighResMIP simulations from FGOALS-f3-H(FGOALS)and MRIAGCM3-2-S(MRI)with respect to tropical cyclone(TC)characteristics over the Western North Pacific(WNP)for the July-October months of *** focus is on investigating the role of the tropical easterly jet over the Western Pacific(WP_TEJ)in modulating the simulation biases in terms of their climatological distribution and interannual variability of WNP TC genesis frequency(TCGF)based on the analysis of the genesis potential index(GPI).Results show that the two models reasonably capture the main TC genesis location,the maximum center of frequency,and track density;however,their biases mainly lie in simulating the intense TCs and TCGF *** MRI better simulates the windpressure relationship(WPR)but overestimates the proportion of super typhoons(SSTYs).At the same time,FGOALS underestimates the WPR and the proportion of SSTYs but better simulates the total WNP TC *** particular,FGOALS overestimates the TCGF in the northeastern WNP,which is strongly tied to an overestimated WP_TEJ and the enhanced vertical circulation to the north of its entrance *** contrast,the MRI simulates a weaker WP_TEJ and vertical circulation,leading to a negative TCGF bias in most of the *** models exhibit comparable capability in simulating the interannual variability of WP_TEJ intensity,but the composite difference of large-scale atmospheric factors between strong and weak WP_TEJ years is overestimated,resulting in larger interannual anomalies of WNP TCGF,especially for ***,accurate simulations of the WP_TEJ and the associated oceanic and atmospheric factors are crucial to further improving WNP TC simulations for both models.

关键词： tropical cyclone genesis HighResMIP tropical easterly jet

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Microphysical Characteristics of Melting Layers in North China Revealed by Aircraft and Radar

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REMOTE SENSING 2024年第12期16卷

作者： Hu, Xiangfeng Hou, Shaoyu Yang, Jiefang zhao, shuwen Zhang, Xiaorui Tao, Yue Li, Hongyu Zhang, Xiaotuo Huang, Hao Hebei Prov Weather Modificat Ctr Shijiazhuang 051432 Peoples R China China Meteorol Adm Key Lab Radar Meteorol Beijing 100044 Peoples R China Chinese Acad Sci Inst Atmospher Phys Lab Cloud Precipitat Phys & Severe Storms Beijing 100029 Peoples R China China Meteorol Adm Cloud Precipitat Phys & Weather Modificat Key Lab Beijing 100044 Peoples R China Nanjing Univ Sch Atmospher Sci Key Lab Mesoscale Severe Weather MOE Nanjing 210023 Peoples R China Nanjing Univ Frontiers Sci Ctr Crit Earth Mat Cycling Nanjing 210023 Peoples R China

The microphysical processes within the melting layer (ML) of stratiform clouds have been understudied, particularly regarding their intricate properties and behaviors. This study explores the ML's microphysical characteristics in three distinct stratiform cloud occurrences over North China from 2017 to 2019. Our findings reveal that the reflectivity factor, coupled with the volume-weighted diameter (Dm), escalates within the upper and middle sections of the ML across all cases, suggesting that aggregation, primarily in the top 40% of the ML, significantly enhances the bright band phenomenon. Notably, the 2019 case (Spiral3) displayed more vigorous aggregation activities compared to the 2017 event (Spiral1), possibly due to larger initial particle sizes, leading to a swift increase in both mean and maximum particle diameters. Conversely, in the lower 60% of the ML, ongoing melting reduces mean particle diameters and potentially decreases total number concentration (Nt) due to accelerated particle descent. However, the 2018 case (Spiral2) deviated by showing a rapid Nt increase in the lowest 20% of the ML, where breakup mechanisms counteracted melting effects. The MLs in Spiral1 and Spiral3, in which aggregates were mainly formed by plate-like ice crystals, were thicker than those in Spiral2, dominated by low-density aggregates formed by the combination of needle and columnar ice crystals. This analysis underscores how variations in particle characteristics, such as habit, density, and size, along with thermodynamic conditions, dictate the onset temperature for melting, ML thickness, and dominant microphysical processes, which differ markedly among the cases.

关键词： snowmelt/ice melt in situ particle measurement aggregation/breakup particle habit

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Relaxation Energy as a Descriptor for Quick Evaluation of Dopability in Defect Engineering of Materials: Application to Dopant Screening in Lu2SiO5

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PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS 2025年第6期19卷

作者： Cui, Yu Sun, Xuejiao Gao, Feng Xue, Zhongjun zhao, shuwen Ding, Dongzhou Yang, Fan Sun, Yi-Yang Changchun Normal Univ Sch Phys Changchun 130032 Jilin Peoples R China Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine M Shanghai 201899 Peoples R China

The development of scintillation materials often requires significant efforts in defect engineering. A quick screening approach of the possible dopant elements is urgently needed. Lu2SiO5 (LSO) is a scintillation material with wide applications in nuclear medicine, public security, and high-energy physics. Ca doping and Al doping have been demonstrated to enhance the scintillation properties of Ce-doped LSO. To further carry out such an approach, it is expected to use first-principles calculations to assist the defect engineering. Unfortunately, the direct calculation of defect formation energy is a complicated process. Herein, the use of the relaxation energy of a dopant in the host lattice as a descriptor for the defect formation energy is proposed. It is suited for high-throughput calculations. 32 elements are selected for doping LSO and the difficulty of substituting Lu and Si sites with these elements was analyzed. For 15 doping cases, the defect formation energies are directly calculated and compared with the corresponding relaxation energies. The results suggest that the relaxation energy could serve the purpose stated above. This descriptor is expected to play a more important role in larger-scale screening for defect engineering in LSO and other inorganic nonmetallic materials, for example, when codoping is planned for.

关键词： defect engineering defect formation energies descriptor Lu2SiO5 scintillation materials

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Luminescence and scintillation properties of Yb - Codoped GAGG:Ce single crystal

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OPTICAL MATERIALS 2022年 123卷

作者： Qi, Qiang Li, Mingqing zhao, shuwen Xue, Zhongjun Ding, Dongzhou Shi, Junjie Chinese Acad Sci Shanghai Inst Ceram Shanghai 200050 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China Univ Shanghai Sci & Technol Shanghai 200093 Peoples R China

Co-doping is one of the important methods to optimize the performance of scintillation crystal. In this work, GAGG:1.0 at.%Ce,x at.%Yb(x = 0, 0.2, 0.5 and 1.0) crystals were grown by Czochralski method. Relationships between Yb concentration and optical, photoluminescence (PL), scintillation properties of GAGG:Ce,Yb are investigated, including absorption, light output, decay time. Moreover, PL decay curves were measured at various temperatures between 77 and 500 K to investigate the luminescence thermal quenching behavior. The results show that with the increase of Yb3+ concentration, the transmittance of GAGG crystal increases. Decay time is also significantly improved. 1.0 at.%Yb co-doped sample showed the fastest PL decay time of 36 ns among the Yb-co-doped samples. In addition, the impact of Yb on Vickers hardness was also studied.

关键词： GAGG:Ce,Yb Co-doping Photoluminescence properties Scintillation properties

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Slow Emission Suppression in YSO:Ce Scintillation Crystals by Cr Codoping

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CRYSTAL GROWTH & DESIGN 2024年第3期24卷 1024-1031页

作者： Xue, Zhongjun Wan, Bo Zhang, Aochen Zhang, Zhe Yang, Jing Zheng, Xiang Xie, Jianjun Shi, Junjie zhao, shuwen Ding, Dongzhou Chinese Acad Sci Shanghai Inst Ceram Shanghai 201899 Peoples R China Shanghai Univ Sch Microelect Shanghai 200444 Peoples R China Shanghai Univ Sch Mat Sci & Engn Shanghai 200444 Peoples R China

This work systematically investigated the effect of Cr4+ codoping on the spectral composition and scintillation performance of YSO:Ce scintillation crystals. A series of YSO:Ce,xCr (x = 0, 0.1, 0.3, 0.6, 1.0, and 2.0 atom %) crystals were grown with the Czochralski method in a nitrogen atmosphere. The influence of Cr4+ codoping on crystal luminescence was analyzed through transmittance spectra, photoluminescence, and X-ray excited luminescence spectra. Scintillation performance and carrier trap states of the crystals were studied by gamma spectroscopy, scintillation decay dynamics, and thermoluminescence curves. It was found that low concentration Cr4+ codoping can significantly reduce the proportion of long wavelength emission of the Ce2 site without decreasing the crystal YSO:Ce light output. In the case of high concentration Cr4+ codoping, light output decreased rapidly due to Cr4+ forming the intense carrier competition and reabsorption of Ce3+ emission. However, the decay time could be optimized by about 10% without significantly deteriorating the light output using high concentration Cr4+ codoped YSO:Ce crystals as an external filter. This could be more valuable for application. In addition, the possible mechanisms of the above phenomena were discussed based on the experimental results.

关键词： Crystal structure Crystals Energy Light Luminescence

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Assessment of potentially toxic element contamination in commercially harvested invertebrates from the Beibu Gulf, China

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MARINE ENVIRONMENTAL RESEARCH 2024年 202卷 106744页

作者： zhao, shuwen Su, Qiongyuan Huang, Liangliang Wang, Caiguang Ma, Jie Zhu, Liang Cheng, Yanan Yang, Xi Yang, Yiheng Kang, Bin Guilin Univ Technol Coll Environm Sci & Engn Guilin 541004 Peoples R China Guangxi Key Lab Environm Pollut Control Theory & T Guilin 541004 Peoples R China Guangxi Collaborat Innovat Ctr Water Pollut Contro Guilin 541004 Peoples R China Guizhou Univ Coll Resources & Environm Engn Guiyang 550000 Guizhou Peoples R China Ocean Univ China Coll Fisheries Qingdao 266100 Shandong Peoples R China

Marine pollutants, especially potentially toxic elements (PTEs), increasingly threaten the ecological environment and fishery resources of the Beibu Gulf due to their bioaccumulative nature, toxicity, and persistence. However, the occurrences of multiple PTEs in marine invertebrates within this region remains unclear. Hence, a total of 18 species of commercially harvested invertebrates (shrimp, crab, cephalopod, shellfish, and sea cucumber) were collected from the Beibu Gulf, and the concentrations of nine important PTEs (As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn) were examined. Subsequent stable isotope analysis for delta 13C and delta 15N facilitated investigations into biomagnification and human health risk assessment. The results showed that, except for As, the concentrations of the PTEs in the invertebrates were below the national safety limits. Furthermore, significant positive correlations were found between trophic levels (TLs) and log-transformed concentrations of As (P < 0.001, R2 = 0.20) and Cr (P < 0.001, R2 = 0.13), indicating biomagnification of these two metals across trophic positions among species. Finally, the human health risk assessment revealed that the consumption of cephalopod, shellfish, and sea cucumber poses a higher risk of adverse effects compared to shrimp and crab.

关键词： Arsenic Marine ecosystems Stable isotopes Biomagnification Health risk assessment

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van der Waals Stacking-Determined Polymorphs of Quasi-One-Dimensional BiSCl Grown by Chemical Vapor Deposition

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JOURNAL OF PHYSICAL CHEMISTRY LETTERS 2024年第31期15卷 7939-7944页

作者： Zeng, Biao Lu, Lingyan Ming, Chen zhao, shuwen Dai, Ruiwen Zhou, Zhengyang Zhang, Jiawei Ding, Dongzhou Xin, Guoqing Sun, Yi-Yang Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine M Shanghai 201899 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China Huazhong Univ Sci & Technol Wuhan Natl High Magnet Field Ctr Wuhan 430074 Hubei Peoples R China Huazhong Univ Sci & Technol Sch Phys Wuhan 430074 Hubei Peoples R China

We report chemical vapor deposition (CVD) synthesis of two quasi-one-dimensional (quasi-1D) polymorphs of BiSCl, denoted by y-BiSCl and r-BiSCl. The length of the CVD samples can reach about 0.4 mm. Such quasi-1D samples of the two polymorphs can be readily separated into individual pieces for either characterization or application. The two polymorphs can be clearly differentiated by Raman spectroscopy. First-principles calculations and group analysis are used to assign each Raman peak to the corresponding vibrational mode. Ultraviolet-visible measurements on solution grown thin-film samples reveal that the two polymorphs exhibit significantly different band gaps of 2.08 eV (y-BiSCl) and 1.81 eV (r-BiSCl). First-principles calculation further shows that the interatomic chain binding energy is 18.1 meV/& Aring;(2), confirming that the van der Waals stacking determines the difference in their band gaps. Our findings highlight the possibility of realizing the desired functionalities in quasi-1D materials by controlling stacking orientation.

关键词： Bismuth compounds

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Repurposing Xylan Biowastes for Sustainable Household Detergents

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ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023年第7期11卷 2949-2958页

作者： Wang, Hairong Li, Xupeng zhao, shuwen Liu, Qiaoling Li, Nan Su, Zhenhua Ren, Junli Hao, Xiang Peng, Feng China Natl Pulp & Paper Res Inst Beijing 100102 Peoples R China South China Univ Technol State Key Lab Pulp & Paper Engn Guangzhou 510640 Peoples R China Beijing Forestry Univ MOE Engn Res Ctr Forestry Biomass Mat & Energy Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China

Seeking sustainable and biocompatible detergent remains a big challenge. In this work, we report a new type of polysaccharide nanocrystal that is extracted from available industrial xylan biowastes via mild ammonium persulfate (APS) aqueous oxidation, which subsequently serves as a sustainable household detergent. By carefully adjusting the oxidation conditions (similar to 0.5 M, 60 degrees C), plate xylan hydrated nanocrystals (XNCs) can be accessed in reasonable yield (similar to 23%) with diameters of 30-50 nm and thicknesses of 5-12 nm. In comparison to the cellulose nanocrystal (CNC), the crystalline structure of XNCs demonstrates remarkable humidity-dependent behavior. Additionally, the acetylated xylan nanocrystals (AXNCs) exhibit high surface/interface activity to form stable Pickering emulsions, intriguing cleaning efficiency in removing stains from fabric surfaces, and the capability to de-wet oil from various types of tableware material. Seed germination, crop growth, and aquatic ecotoxicological evaluation demonstrate that AXNCs show no toxicity toward plants and zebrafish (median lethal concentration > 20,000 mg/L) with which they can be applied either as eco-friendly laundry or kitchen detergents. Our work presents a new avenue for converting industrial biowastes into sustainable household materials.

关键词： industrial xylan biowastes acetylated xylan nanocrystals (AXNCs) household detergents no toxicity sustainable

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