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Quantifying the pollution changes and meteorological dependence of airborne trace elements coupling source apportionment and machine learning

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Science of the Total environment 2024年 948卷 174452页

作者： Wang, Haolin Guan, Xu Li, Jiao Peng, Yanbo Wang, Guoqiang Zhang, Qingzhu Li, Tianshuai Wang, Xinfeng Meng, Qingpeng Chen, Jiaqi Zhao, Min Wang, Qiao Academician Workstation for Big Data Research in Ecology and Environment Environmental Research Institute Shandong University Qingdao266237 China Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation Shandong Academy for Environmental Planning Jinan250101 China Shandong Tianve Engineering Technology Co. LTD China

Airborne trace elements (TEs) present in atmospheric fine particulate matter (PM2.5) exert notable threats to human health and ecosystems. To explore the impact of meteorological conditions on shaping the pollution characteristics of TEs and the associated health risks, we quantified the variations in pollution characteristics and health risks of TEs due to meteorological impacts using weather normalization and health risk assessment models, and analyzed the source-specific contributions and potential sources of primary TEs affecting health risks using source apportionment approaches at four sites in Shandong Province from September to December 2021. Our results indicated that TEs experience dual effects from meteorological conditions, with a tendency towards higher TE concentrations and related health risks during polluted period, while the opposite occurred during clean period. The total non-carcinogenic and carcinogenic risks of TEs during polluted period increased approximately by factors of 0.53–1.74 and 0.44–1.92, respectively. Selenium (Se), manganese (Mn), and lead (Pb) were found to be the most meteorologically influenced TEs, while chromium (Cr) and manganese (Mn) were identified as the dominant TEs posing health risks. Enhanced emissions of multiple sources for Cr and Mn were found during polluted period. Depending on specific wind speeds, industrialized and urbanized centers, as well as nearby road dusts, could be key sources for TEs. This study suggested that attentions should be paid to not only the TEs from primary emissions but also the meteorology impact on TEs especially during pollution episodes to reduce health risks in the future. © 2024 Elsevier B.V.

关键词： Health risks

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Evolution of Polystyrene in Simulated River: Micro(Nano)Plastics Generation and Plastic Additives Release

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SSRN 2024年

作者： Yang, Nina Zuo, Jiane Men, Cong Zhang, Yanyan Xie, Zhenwen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Shenzhen International Graduate School Tsinghua University Shenzhen518055 China School of Energy and Environmental Engineering Beijing Key Laboratory of Resource-Oriented Treatment of Industrialpollutants University of Science and Technology Beijing Beijing100083 China Chengdu Xingrong Environment Co. Ltd Chengdu610041 China Chengdu Drainage Co. Ltd Chengdu610011 China

In rivers, the release of micro(nano)plastics and additives resulting from plastic weathering pose significant environmental threats. However, systematic research on the weathering behaviors of plastics mentioned above is still limited. This study systematically explored these phenomena by exposing PS to UV irradiation and mechanical agitation for different durations (1 day, 5 days, 10 days, 20 days). The degree of ageing and the abundance of carbonyl (C=O) functional groups in polystyrene (PS) gradually increased with time. Notably, flake bulges and cracks emerged as characteristic features of PS ageing. A positive correlation was identified between the released micro(nano)plastics content and the extent of plastic ageing. The 10-20 μm size range accounted for the largest fraction over time and remained relatively stable. Simultaneously, the proportions of 20 μm microplastics gradually increasd, and eventually the proportions of all three tended to equalize. The dominant size range of nanoplastics shifted towards smaller sizes over time, albeit with a certain limit. Twenty types of chemicals were detected, including bisphenol A (BPA), dibutyl phthalate (DBP) and Di(2-ethylhexyl) phthalate (DEHP), with antioxidant 168 showing the highest content. The release of plastic additives was influenced by a combination of ageing time, additive type, and quantity. © 2024, The Authors. All rights reserved.

关键词： Polystyrenes

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Fate of Cd during mineral transformation by sulfate-reducing bacteria in clay-size fractions from soils with high geochemical background

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Journal of Hazardous Materials 2023年第1期459卷 132213页

作者： Yan, Xing Guan, Dong-Xing Li, Jie Song, Yinxian Tao, Hua Zhang, Xianming Ma, Ming Ji, Junfeng Zhao, Wancang Chongqing Key Laboratory of Karst Environment School of Geographical Sciences Southwest University Chongqing400715 China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource Sciences Zhejiang University Hangzhou310058 China College of Resources and Environment Southwest University Chongqing400715 China Department of Geosciences Faculty of Land Resource Engineering Kunming University of Science and Technology Yunnan Province Kunming650093 China Chongqing Geological and Mineral Resource Exploration and Development Bureau 607 Geological Team Chongqing401120 China Key Laboratory of Surficial Geochemistry Ministry of Education School of Earth Sciences and Engineering Nanjing University Nanjing210093 China

Sulfate-reducing bacteria (SRB) can immobilize heavy metals in soils through biomineralization, and the parent rock and minerals in the soil are critical to the immobilization efficiency of SRB. To date, there is little knowledge about the fate of Cd associated with the parent rocks and minerals of soil during Cd immobilized by SRB. In this study, we created a model system using clay-size fraction of soil and SRB to explore the role of SRB in immobilizing Cd in soils from stratigraphic successions with high geochemical background. In the system, clay-size fractions (particle size -OX) and the crystalline iron oxide (Fe-CBD), were separated by extraction. The reaction of SRB with them verified the transformation of primary iron-bearing minerals into secondary iron-bearing minerals, which contributed to Cd redistribution. This study shows that SRB could exploit the composition and structure of minerals to induce mineral recrystallization, thereby aggravating Cd redistribution and immobilization in clay-size fractions from stratigraphic successions with high geochemical background. © 2023 Elsevier B.V.

关键词： Iron oxides

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Modified Peck method of evaluating tunnelling-induced ground movements based on measured data

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Arabian Journal of Geosciences 2022年第9期15卷 1-26页

作者： Zhang, Zhiguo Chen, Jie Zhang, Mengxi Yang, Xuan School of Environment and Architecture University of Shanghai for Science and Technology Shanghai China Key Laboratory of Geohazard Prevention of Hilly Mountains (Ministry of Natural Resources) Fujian Key Laboratory of Geohazard Prevention Fuzhou China Department of Civil and Environmental Engineering National University of Singapore Singapore Singapore Department of Civil Engineering Shanghai University Shanghai China

The precise prediction of ground settlement troughs due to underground tunnelling is of great significance in geotechnical design. The traditional approaches for ground movements are mostly established in individual or underabundant cases. It is necessary to further modify the traditional methods to make them more widely applicable. In this study, two modified Peck formulas of settlement trough width parameters for surface and subsurface ground caused by tunnel excavation are proposed respectively by the numerous measured data from the field projects and model tests. Firstly, the modified fitting formula of width parameter is for surface settlement trough is obtained based on the data from 11 field cases, which can capture the main parameters, including the tunnel radius R, tunnel depth h, and soil physical characters (such as, internal friction angle φ). Additionally, 3 sets of measured surface settlement data from 2 field cases are selected and compared with the results calculated by the proposed formula. Then, by analyzing the measured settlement data from 22 field cases and 2 model tests statistically, the modified formula of subsurface settlement trough width parameter $${i}_{z}$$ is proposed and verified by 4 sets of measured data from 2 projects. Finally, to check the overall applicability of the proposed formulas, the surface and subsurface settlements at different depths in 3 field cases and a model test are calculated and compared with the measured data. The results show that the ground settlements calculated by the proposed modified formulas are in good agreements with field measurements.

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Amino-Modified Nanoplastics at Predicted environmental Concentrations Cause Transgenerational Toxicity Through Activating Germline Egf Signal in Caenorhabditis Elegans

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SSRN 2024年

作者： Liu, Huanliang Tan, Xiaochao Li, Xiaona Wu, Yu Lei, Shuhan Wang, Zhenyu Environment and Health Research division Public Health Research Center Wuxi School of Medicine Jiangnan University Jiangsu Wuxi214122 China Institute of Environmental Processes and Pollution Control School of Environmental and Civil Engineering Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan University Wuxi214122 China

In the real environment, some chemical functional groups are unavoidably combined on the nanoplastic surface. Reportedly, amino-modified polystyrene nanoparticles (PS-A NPs) exposure in parents can induce severe transgenerational toxicity, but the underlying molecular mechanisms remain largely unclear. Using Caenorhabditis elegans as the animal model, this study was performed to investigate the role of germline epidermal growth factor (EGF) signal on modulating PS-A NPs’ transgenerational toxicity. As a result, 1-10 μg/L PS-A NPs exposure transgenerationally enhanced germline EGF ligand/LIN-3 and NSH-1 levels. Germline RNAi of lin-3 and nsh-1 was resistant against PS-A NPs’ transgenerational toxicity, implying the involvement of EGF ligand activation in inducing PS-A NPs’ transgenerational toxicity. Furthermore, LIN-3 overexpression transgenerationally enhanced EGF receptor/LET-23 expression in the progeny, and let-23 RNAi in F1-generation notably suppressed PS-A NPs’ transgenerational toxicity in the exposed worms overexpressing germline LIN-3 at P0 generation. Finally, LET-23 functioned in neurons and intestine for regulating PS-A NPs’ transgenerational toxicity. LET-23 acted at the upstream DAF-16/FOXO within the intestine in response to PS-A NPs’ transgenerational toxicity. In neurons, LET-23 functioned at the upstream of DAF-7/DBL-1, ligands of TGF-β signals, to mediate PS-A NPs’ transgenerational toxicity. Briefly, this work revealed the exposure risk of PS-A NPs’ transgenerational toxicity, which was regulated through activating germline EGF signal in organisms. © 2024, The Authors. All rights reserved.

关键词： Ligands

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Effects of Different Led Green Light Intensities on the Growth, Feeding and Physiological Functions of Juvenile Tiger Puffer (Takifugu Rubripes)

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SSRN 2024年

作者： Sun, Fei Zhang, Yining Liu, Ying Cai, Haowei Ma, He Zhang, Zhibo Li, Xiaohao Key Laboratory of Environment Controlled Aquaculture Dalian Ocean University Dalian116023 China College of Marine Science Technology and Environment Dalian Ocean University Dalian116023 China College of Biosystems Engineering and Food Science Zhejiang University Hangzhou310058 China College of Aquatic and Life Sciences Dalian Ocean University Dalian116023 China

To investigate the effects of different light-emitting diode (LED) green light levels on the growth and development of juvenile tiger puffer (Takifugu rubripes), tiger puffer individuals with a body mass of (15.30±3.72 g) and body length of (7.51±0.70 cm) were exposed to various LED green light intensities (300 mW/m2, 500 mW/m2, 750 mW/m2, 1000 mW/m2, 1500 mW/m2), as well as white light (500 mW/m2) and darkness, over a 60-day period. Three replicates of 60 juvenile tiger puffer were assigned to each group. Survival rate, growth rate, feeding behavior, and physiological parameters were measured at the end of the experiment. The findings are as follows: 1)Tiger puffer juvenile breed under white light, darkness, and green light intensities ranging from 500 to 1000 mW/m2 exhibited higher body length and weight. 2) juvenile exposed to green light intensities between 500 and 1000 mW/m2 showed improved relative fatness and feed conversion efficiency. 3) juvenile reared in darkness, under green light at 500 mW/m2, and in white light conditions demonstrated higher survival rates. 4) juvenile exposed to green light intensities of 500 and 750 mW/m2 exhibited increased levels of growth hormone and digestive enzyme activities in juvenile tiger puffer. 5) Green light intensities of 1000 and 1500 mW/m2 inhibited metabolic enzyme activities in juvenile tiger puffer. 6) Green light intensity of 500 mW/m2 and a white light environment enhanced antioxidant enzyme activities in juvenile tiger puffer. In conclusion, juvenile tiger puffer raised under green light intensities ranging from 500 to 750 mW/m2, along with a white light environment, displayed improved digestive metabolism and resistance to oxidative stress, leading to enhanced growth and feeding performance. © 2024, The Authors. All rights reserved.

关键词： Feeding

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Visible Light Can Also Efficiently Activate Chlorine Dioxide for the Abatement of Micropollutants

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SSRN 2025年

作者： Zhang, Bin Lv, Qixiao Zeng, Ge Zhang, Wenjun Su, Peng Hou, Xiangyang Li, Wenqi Wu, Zihao Yang, Tao Jiangmen Key Laboratory of Synthetic Chemistry and Cleaner Production Institute of Carbon Peaking and Carbon Neutralization School of Environmental and Chemical Engineering Wuyi University Guangdong Province Jiangmen529020 China State Key Laboratory of Urban Water Resource and Environment School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin150090 China Guangdong-Hong Kong Joint Laboratory for Water Security Center for Water Research Advanced Institute of Natural Sciences Beijing Normal University Zhuhai Campus Zhuhai519087 China

Advanced oxidation processes (AOPs) based on chlorine dioxide (ClO2) activation via ultraviolet (UV) exist the defect of high-energy consumption. Herein, a novel visible-activated ClO2 oxidation system (Vis-LED/ClO2) was developed. Results showed that 93.04% of atenolol (ATL) was rapidly removed by Vis425-LED/ClO2 process within 20 mins. Compared with single ClO2 or Vis425-LED system, the degradation rates of selected six contaminants were significantly increased in the Vis425-LED/ClO2 system. Under visible light irradiation, ClO2 decomposed into Cl−, ClO2−, ClO3− and free chlorine. Quenching and probe experiments confirmed that hydroxyl radicals (HO•), chlorine oxide radicals (ClO•) and chlorine radicals (Cl•) and ozone (O3) co-contributed to the degradation of ATL. The steady-state concentrations of HO•, ClO• and Cl•, as well as the average concentration of O3, were determined in Vis-LED/ClO2 systems at wavelengths λ=425, 440, 460 and 480 nm. Solution pH hardly affected the degradation of ATL, while increasing of ClO2 concentration enhanced the ATL degradation. The established kinetic model accurately predicted ATL degradation, reactive species concentrations, and the contributions of each component in the Vis-LED/ClO2 system. Cl– had little effect on ATL degradation, while HCO3– and humic acid (HA) inhibited ATL degradation by quenching reactive species. The effectiveness of the system in real water and the low risk of disinfection byproducts were also verified. This work provided an efficient and energy-saving AOPs for the elimination of contaminants, which has important implications for understanding the photolysis and transformation of ClO2 under visible light irradiation. © 2025, The Authors. All rights reserved.

关键词： Photolysis

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Drivers of ecological drought recovery: Insights from meteorological and soil drought impact

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Journal of Hydrology 2025年 646卷

作者： Ge, Chenhao Sun, Peng Yao, Rui Zhang, Yayi Shen, Han Yang, Huilin School of Geography and Tourism Anhui Normal University Wuhu241002 China State Key Laboratory of Earth Surface Processes and Resource Response in the Yangze-Huaihe River Basin Anhui Normal University Wuhu241002 China Engineering Technology Research Center of Resources Environment and GIS Anhui Normal University Wuhu241002 China

Prolonged droughts typically have more severe impacts on ecosystems. The recovery time (RT) from drought is a crucial indicator for assessing the extent of drought impact on ecosystems. However, the drought recovery extent and dominant factors in the recovery characteristics of ecological drought (ED) from meteorological drought (MD) and soil drought (SD) remain to be further clarified. Therefore, this study employs reanalysis data and remote sensing vegetation indices to analyze the spatial patterns of ED recovery times from MD/SD (MRT/SRT). The dominant factors affecting RT across climatic zones were identified using random forest regression models and partial correlation, and the response characteristics of RT to these dominant factors under different land cover and irrigation types were explored. Regions with high recovery pressure and differential rates were identified, and their driving factors were explored. The results show that the SRT in China is approximately twice the MRT. Farmland experiences the highest MRT (4.9 months), particularly in the continuous and double-cropping irrigation areas of North China, while bare ground has the highest average SRT (6.4 months). MRT/SRT in China is most significantly influenced by surface temperature (TEM) and atmospheric vapor pressure deficit (VPD) during the recovery period, showing a predominant positive response to dominant factors across climatic zones. Grassland RT is notably affected by variations in all types of climatic factors. However, an increase in TEM and VPD significantly extends the RT of farmlands, especially in the double-cropping irrigation areas of North and Central China. Compared to MD, ED has more difficulty recovering from SD, exhibiting higher RT, recovery stress, and recovery differential rate. Decrease in soil moisture (SM) lead to poorer drought recovery outcomes. This study uncovers the differentiated recovery characteristics of ED in response to various types of drought and their dominant

关键词： Drought recovery time Ecological drought Meteorological drought Recovery differential rate Recovery stress Soil drought

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The defect-rich porous CoP4/Co4S3 microcubes as robust electrocatalyst for clean H2 energy production via alkaline overall water splitting

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Applied Catalysis A: General 2023年 668卷

作者： Wang, Xiangmei Xiao, Xin Yan, Honglin Chen, Chuntao Zhang, Dongen Sun, Dongping Xu, Xingyou Institute of Chemicobiology and Functional Materials School of Chemistry and Chemical Engineering Nanjing University of Science and Technology 200 Xiao Ling Wei Street Nanjing210094 China Jiangsu Key Laboratory of Marine Bioresources and Environment Jiangsu Ocean University Lianyungang222005 China

Although water electrolysis is one of the most environmentally friendly methods for producing hydrogen (H2) and oxygen, designing robust non-noble electrocatalysts for overall water splitting remains a massive challenge. Modulating the morphology and chemical composition of non-noble-metal bifunctional electrocatalysts is an effective way to enhance catalytic activity in water electrolysis. Herein, a robust electrocatalyst with porous CoP4/Co4S3 microcubes rich in defects was synthesized through the phosphorylation and hydrothermal vulcanization of a Co–Co Prussian blue analog (Co–Co PBA). Given that the as-prepared CoP4/Co4S3 microcubes can provide additional active sites to accelerate electron transfer at the heterointerface, they exhibit enhanced catalytic activities in hydrogen and oxygen evolution reactions in 1.0 M KOH. When used as a bifunctional catalyst in a two-electrode electrolyzer, the micrucubesrequire a cell voltage of 1.67 V to achieve a current density of 10 mA cm−2 in 1.0 M KOH, indicating its potential as an efficient alkaline non-noble electrocatalyst for overall water splitting. This study provides a promising electrocatalyst for clean H2 energy production by modulating its morphology and chemical composition. © 2023

关键词： Electrocatalysts

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Atmospheric duct propagation loss prediction based on time convolution network(TCN)

Atmospheric duct propagation loss prediction based on time c...

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作者： Ziliang Wei Jiajing Wu Bo Yin Dongning Jia Jiali Xu School of Information Science and Engineering Ocean University of China National key laboratory of electromagnetic environment Chinese Research Institute of Radiowave Propagation Pilot National Laboratory for Marine Science and Technology

The accurate prediction of propagation loss of radio waves in atmospheric duct environment is a hot issue in radar signal transmission and target detection research. Deep learning has achieved good results in many fields, and there are corresponding applications in the accurate prediction of propagation loss prediction. In this paper, we use the timeseries convolutional network(TCN) model to predict the data of evaporative duct and surface duct over-the-horizon propagation loss time series and compare the prediction effect with the current state-of-the-art time-series prediction network models LSTM and GRU. The RMSE is used as the evaluation index to calculate their accuracy, and the experiments prove that the TCN model has the best prediction effect than the most advanced LSTM and GRU models, both in the evaporative duct and surface duct environments.

关键词： propagation loss time-series prediction TCN LSTM GRU

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