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Consequential fate of bisphenol-attached PVC microplastics in water and simulated intestinal fluids

Environmental Science and Ecotechnology 2020年第2期2卷 48-56页

作者： Pengfei Wu yuanyuan tang Hangbiao Jin yuanyuan Song Yunsong Liu Zongwei Cai State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and Technology1088 Xueyuan BlvdNanshan DistrictShenzhen518055PR China State Key Laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong Kong SARPR China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of EnvironmentZhejiang University of TechnologyHangzhouZhejiang310014PR China

The ever-increasing prevalence of microplastics and different bisphenols made the presence of bisphenol-attached microplastics a critical *** this study,experiments were performed to examine desorption behaviors and cytotoxicity performance of contaminated microplastics in aquatic surroundings and intestinal environment after ingestion by organisms(cold-/warm-blooded).The kinetic study shows that the rate of desorption for bisphenols can be enhanced threefold under simulated warm intestinal *** Freundlich isotherms indicate multiple-layer desorption of the bisphenols on the heterogeneous surfaces of polyvinyl chloride(PVC)*** was detected in the adsorption/desorption of bisphenols in a water environment,but no adsorption/desorption hysteresis was observed in the simulated intestinal conditions of warm-blooded *** to enhanced bioaccessibility,the desorption results imply that the environmental risk of contaminated PVC microplastics may be significantly increased after ingestion at a high bisphenols *** with different IC_(50),the five bisphenols released under the intestinal conditions of warm-blooded organisms can cause higher proliferation reduction in fish and human cell lines than the bisphenols released in *** study helps elucidate the consequential fate and potential cytotoxicity of contaminated microplastics and the possible implications of the microplastics as a critical vector for bisphenols to increase the potential health risks.

关键词： Microplastics Bisphenols Desorption behavior Bioaccessibility Cytotoxicity

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Cu/Cr co-stabilization mechanisms in a simulated Al_(2)O_(3)-Fe_(2)O_(3)-Cr_(2)O_(3)-CuO waste system

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Frontiers of Environmental Science & Engineering 2021年第6期15卷 259-270页

作者： Fanling Meng Yunxue Xia Jianshuai Zhang Dong Qiu Yaozhu Chu yuanyuan tang State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Chromium slag usually contains various heavy metals,making its safe treatment *** sintering has been applied to resolve this issue and emerged as an effective method for metal immobilization by incorporating heavy metals into stable crystal ***,there is limited knowledge about the reaction pathways adopted by multiple heavy metals and the co-stabilization functions of the crystal *** study the Cu/Cr co-stabilization mechanisms during thermal treatment,a simulated system was prepared using a mixture with a molar ratio of Al_(2)O_(3):Fe_(2)O_(3):Cr_(2)O_(3):CuO=1:1:1:*** samples were sintered at temperatures 600–1300℃ followed by intensive analysis of phase constitutions and microstructure development.A spinel phase(CuFe_(x)Al_(y)Cr_(2–x–y)O_(4))started to generate at 700℃ and the incorporation of Cu/Cr into the spinel largely complete at 900℃,although the spinel peak intensity continued increasing slightly at temperatures above 900℃.Fe_(2)O_(3)/Cr_(2)O_(3) was more easily incorporated into the spinel at lower temperatures,while more Al_(2)O_(3) was gradually incorporated into the spinel at higher ***,sintered sample microstructures became more condensed and smoother with increased sintering ***/Cr leachability substantially decreased after Cu/Cr incorporation into the spinel phase at elevated *** 600℃,the leached ratios for Cu and Cr were 6.28%and 0.65%,*** sintering temperature was increased to 1300℃,the leached ratios for all metal components in the system were below 0.2%.This study proposes a sustainable method for managing Cu/Cr co-exist slag at reasonable temperatures.

关键词： Spinel structure Copper Chromium Co-stabilization Thermal treatment

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Controlled sintering for cadmium stabilization by beneficially using the dredged river sediment

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Frontiers of Environmental Science & Engineering 2023年第5期17卷 105-115页

作者： Yunxue Xia Dong Qiu Zhong Lyv Jianshuai Zhang Narendra Singh Kaimin Shih yuanyuan tang State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Department of Civil Engineering Faculty of EngineeringThe University of Hong KongHong Kong 999077China Environmental Science Center Decarbonisation and Resource ManagementalBritish Geological SurveyNottinghamshireKeyworth NG125GGUK

Cd-bearing solid wastes are considered to be a serious threat to the environment,and effective strategies for their treatment are urgently *** sintering has been considered as a promising method for efficiently incorporating heavy metal-containing solid wastes into various ceramic ***-rich dredged river sediment,especially Al and Si-containing oxides,can be treated as alternative ceramic precursors rather than being disposed of as solid *** examine the feasibility of using waste sediment for Cd stabilization and the phase transition mechanisms,this study conducted a sintering scheme for the mixtures of CdO and dredged river sediment with different(Al+Si):Cd mole *** investigations have been performed on phases transformation,Cd incorporation mechanisms,elemental distribution,and leaching behaviors of the sintered *** showed that Cd incorporation and transformation in the sintered products were influenced by the mole ratio of(Al+Si):*** the high-Cd series((Al+Si):Cd=6:1),CdSiO_(3),Cd_(2)SiO_(4),CdAl_(2)(SiO_(4))_(2) and Cd_(2)Al_(2)Si_(2)O_(9) were predominant Cd-containing product phases,while Cd2Al2Si2O9 was replaced by CdAl_(4)O_(7) when the mole ratio of(Al+Si):Cd was 12:1(low-Cd series).Cd was efficiently stabilized in both reaction series after being sintered at≥900℃,with<5%leached ratio even after a prolonged leaching time,indicating excellent long-term Cd *** study demonstrated that both Cd-containing phases and the amorphous Al-/Si-containing matrices all played critical roles in Cd stabilization.A promising strategy can be proposed to simultaneously reuse the solid waste as ceramic precursors and stabilize heavy metals in the ceramic products.

关键词： Dredged river sediments Cadmium Sintering Stabilization Leaching

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Robust Inference for Censored Quantile Regression

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Journal of Systems Science & Complexity 2024年

作者： tang yuanyuan WANG Xiaorui ZHU Jianming LIN Hongmei tang Yanlin TONG Tiejun School of Statistics and Information Shanghai University of International Business and Economics Department of Statistics and Data Science Southern University of Science and Technology School of Statistics KLATASDS-MOE East China Normal University Department of Mathematics Hong Kong Baptist University

In various fields such as medical science and finance, it is not uncommon that the data are heavy-tailed and/or not fully observed, calling for robust inference methods that can deal with the outliers and incompleteness efficiently. In this paper, the authors propose a rank score test for quantile regression with fixed censored responses, based on the standard quantile regression in an informative subset which is computationally efficient and robust. The authors further select the informative subset by the multiply robust propensity scores, and then derive the asymptotic properties of the proposed test statistic under both the null and local alternatives. Moreover, the authors conduct extensive simulations to verify the validity of the proposed test, and apply it to a human immunodeficiency virus data set to identify the important predictors for the conditional quantiles of the censored viral load.

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低灵敏度FIR滤波器优化结构

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华中科技大学学报（自然科学版） 2021年第1期49卷 55-62页

作者：庄陵唐园园重庆邮电大学通信与信息工程学院重庆400065

针对有限冲激响应(FIR)滤波器实现时因有限精度限制导致滤波器性能下降问题,基于连续时间传递函数,利用增量差分离散方法提出一种低灵敏度FIR滤波器优化结构.首先,根据传统z算子与增量差分Delta算子的关系,利用双线性变换求得模拟域离... 详细信息

针对有限冲激响应(FIR)滤波器实现时因有限精度限制导致滤波器性能下降问题,基于连续时间传递函数,利用增量差分离散方法提出一种低灵敏度FIR滤波器优化结构.首先,根据传统z算子与增量差分Delta算子的关系,利用双线性变换求得模拟域离散后的状态空间实现,并将系数矩阵进行稀疏化分解得到优化结构状态空间实现;然后,采用状态空间法分析优化结构的参数灵敏度,推导灵敏度和舍入噪声增益表达式;最后,比较各结构实现复杂度,利用数值实例分析灵敏度与舍入噪声性能,并在不同采样周期和量化字长下得到滤波器的幅频与相频响应,将其与理想频响特性进行对比.仿真实验结果表明:所提优化结构的系数灵敏度随着采样频率增加逐渐减小,且在有限字长约束下,幅频和相频响应更稳定.

关键词：有限冲激响应(FIR) 数字滤波器状态空间有限字长灵敏度频响特性

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An organic-inorganic hybrid thermochromic ferroelastic with multi-channel switches

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Chinese Chemical Letters 2023年第9期34卷 305-309页

作者： Yipiao Zeng Junchao Liu Lin Zhou Xin Deng Wenli Yang Xin Yan Yanling Luo Xuan Zhu Xiaoyun Huang Xianjiang Song yuanyuan tang Ordered Matter Science Research Center and School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China

Multifunctional switchable materials are attracting tremendous interest because of their great application potential in signal processing,information encryption,and smart ***,we reported an organic-inorganic hybrid thermochromic ferroelastic crystal,[TMIm][CuCl_(4)](TMIm=1,1,3,3-tetramethylimidazolidinium),which undergoes two reversible phase transitions at 333 K and 419 K,***,these three phases experience a remarkable ferroelastic-paraelastic-ferroelastic(2/m-mmm-2/m)transition,which remains relatively unexplored in ***,the ferroelastic domains can be simultaneously switched under temperature and stress ***,[TMIm][CuCl_(4)]exhibits thermochromic phenomenon,endowing it with extra spectral encryption possibilities during information *** with dielectric switching behavior,[TMIm][Cu Cl_(4)]are promising for practical applications in memory devices,next-generation sensors,and encryption technology.

关键词： Organic-inorganic hybrid compounds Ferroelastic domains Thermochromism Multi-channel switches Bistability

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Unveiling microplastic distribution and interactions in the benthic layer of the Yangtze River Estuary and East China Sea

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Environmental Science and Ecotechnology 2024年第4期20卷 114-122页

作者： Xinyu Ge Feng Xu Bo Li Lili Liu Xiao Lu Lijuan Wang Yunxiao Zhang Jiangpeng Li Jiawei Li yuanyuan tang School of Environmental Science and Engineering College of EngineeringSouthern University of Science and TechnologyShenzhen518055China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental EngineeringEast China University of Science and TechnologyShanghai200237China School of Marine Science and Technology Zhejiang Ocean UniversityZhoushan316004China

Microplastics(MPs),recognized as an emerging global environmental concern,have been extensively detected worldwide,with specific attention directed towards the Yangtze River Estuary(YRE)and East China Sea(ECS)*** their critical research significance,there remains a knowledge gap concerning the distribution of MPs in the benthic layer within this area,particularly regarding interactions governing their *** we illuminate the distribution of MPs within the benthic layer and unravel the intricate interplay between bottom water and sediment in the YRE and *** find that MPs are notably more abundant in bottom water,ranging from 8 to 175 times higher than in surface *** MPs predominantly consist of polyester fibers,exhibit a size range between 0.5 and 5.0 mm,and display distinct ***-occurrence network analysis and Principal Coordinate Analysis confirm a robust correlation between MPs in bottom water and sediment,signifying the pivotal role of bottom water in mediating the distribution and transportation of MPs within the benthic ***,a positive correlation between MPs in sediment and bottom water turbidity underscores the impact of surface sediment resuspension and upwelling on MPs *** study clarifies the intricate interactions within the benthic layer and highlights the crucial role of bottom water as a mediator in the vertical distribution of MPs,advancing our understanding of the“source-to-sink”transport processes governing MPs within water-sediment systems.

关键词： Microplastics Bottom water Sediment Distribution Correlation analysis

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Influences of drought on the stability of an alpine meadow ecosystem

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Ecosystem Health and Sustainability 2022年第1期8卷 511-522页

作者： Tao Zhang Ximeng Ji Mingjie Xu Guang Zhao Zhoutao Zheng yuanyuan tang Ning Chen Juntao Zhu Yongtao He Yangjian Zhang College of Agronomy Shenyang Agricultural UniversityShenyangLiaoningChina Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchunJilinChina Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth SciencesBeijingChina College of Resources and Environment University of Chinese Academy of SciencesBeijingChina

Drought plays a prominent role in affecting ecosystem stability and ecosystem *** on eddy covariance and climatic observations during 2012-2020,the Fisher discriminant analysis method was employed to accurately detect drought ***,the ecosystem water sensitivity and its resistance to drought were quantified to evaluate the ecosystem *** results showed that the alpine meadow suffered drought most frequently at the beginning of the growing ***,drought during the peak growing seasons reduced the gross primary productivity(GPP)the most,by 30.5±15.2%.In the middle of the peak growing seasons,the ecosystem water sensitivity was weak,and thus,the resistance to drought was strong,which resulted in high ecosystem *** the beginning and end of the peak growing seasons,the ecosystem stability was relatively *** stability was positively related to the corresponding multiyear average soil water content(SWC_(ave)).However,drought occurring during high SWC_(ave)periods led to larger reductions in GPP,which indicated that the inhibitory effects of drought on ecosystems were more dependent on the occurrence time of droughts than on ecosystem stability.

关键词： Water sensitivity resistance grassland Tibetan Plateau Fisher discriminant analysis

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Membrane Designing For Membrane Distillation Process

Membrane Designing For Membrane Distillation Process

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第十五届中国水论坛

作者： WANG Ziyi tang yuanyuan LI Bao'an School of Environmental Science and Engineering South University of Science and Technology School of Environmental Science and Engineering

With excellent permeability as the foremost requirement for membrane used in membrane distillation（MD） process, the co-continuous structure is identified as the best morphology of porous membrane for permeation. Since hydrophobicity is a basic requirement for membrane used in MD process, the membrane wetting and fouling can be effectively alleviated with superhydrophobic surface. In this study, the binary diluent was employed to generate the porous polyvinylidene fluoride（PVDF） hollow fiber membrane with co-continuous structure. A facile method was introduced for superhydrophobic coating with papillae-like structure on PVDF membrane surface. The original membrane with co-continuous structure exhibits narrow pore size distribution and excellent permeability. The MD flux, wetting and fouling resistance were significantly enhanced after superhydrophobic modification. This study proposed a promising strategy to design PVDF membrane with co-continuous structure and improve the performance of PVDF membrane in the MD process.

关键词： Membrane distillation PVDF membrane Co-continuous structure Superhydrophobic surface

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“十七年”国产彩色电影的色彩计量研究

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当代电影 2023年第4期 70-77页

作者：唐媛媛西安外国语大学新闻与传播学院

本文通过对“十七年”期间彩色电影的色彩计量分析,将该时期电影的色彩风格进行可视化呈现,并尝试将对该时期色彩风格的追问投射在一个多维度的历史语境中。计量数据表明,“十七年”时期的彩色电影在色彩使用上与影片主题和电影类型等... 详细信息

本文通过对“十七年”期间彩色电影的色彩计量分析,将该时期电影的色彩风格进行可视化呈现,并尝试将对该时期色彩风格的追问投射在一个多维度的历史语境中。计量数据表明,“十七年”时期的彩色电影在色彩使用上与影片主题和电影类型等存在着一定的关系。经分析发现,除了当时的文艺政策、技术等因素影响该时期的色彩风格外,“十七年”彩色电影的褪色现象与当代电影的怀旧色存在一定的平行关系。

关键词： “十七年” 彩色电影色彩计量电影学怀旧美学

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