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The age measurese and its layer sequence stratigraphy of Late Quaternary sediment in Lushan Dajiaochang of China

Hu Dongsheng,Hu Rong,Li Xiaoyu,Hu Wenxuan,Wang Xulong,Tian Xinhong,Liu Weiguo,Zhang Guowei

Strategic Study of CAE 2012, Volume 14, Issue 11,   Pages 36-43

Abstract: and sink to cumulate the sediment environment, by early to night for thedivided to 4 developmentic gyrationalstages the section geologic strata: the I stage is climate period of the glacial epoch (400~200 Ka.B.P

Keywords： sediment of late quaternary period     various dating data     layer type sequence and synthesis age     gyrationalstages of sediments     Dajiaochang area of Lushan in China    

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Adsorption and partition of benzo(a)pyrene on sediments with different particle sizes from the Yellow

XIA Xinghui, HU Lijuan, MENG Lihong

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 172-178 doi: 10.1007/s11783-007-0030-4

Abstract: Experiments have been carried out to study the sorption of Benzo(a)pyrene(Bap) on sediment particles from the Yellow River using a batch equilibration technique. Effects of particle size on the adsorption and partition of Bap were investigated with the particle content of 3 g/L. Several significant results were obtained from the study. (1) Isotherms of Bap could be fitted with the dual adsorption-partition model under different particle sizes, and the measured value of the adsorption and partition was in agreement with the theoretical value of the dual adsorption-partition model. (2) When the particle diameter was "e 0.025 mm, the adsorption was predominant in the sorption of Bap, which accounted for 68.7% 82.4% of the sorption. For the particles with the size of 0.007 mm "e < 0.025 mm, the adsorption was predominant when the equilibrium concentration of Bap was 0 8.87 μg/L in the water phase; and the partition was predominant when the equilibrium concentration of Bap was higher than 8.87 μg/L in the water phase. When the particle diameter was <0.007 mm, the partition was predominant. (3) On the point of particle size, the contribution of adsorption to sorption followed the order: "e0.025 mm > 0.007 mm "d<0.025 mm > <0.007 mm . (4) The partition coefficients of Bap in solids with different particle sizes were linearly correlated with the organic content, and the K of Bap was about 1.26 x 10 (L/kg).
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Prediction of bed load sediments using different artificial neural network models

Reza ASHEGHI, Seyed Abbas HOSSEINI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 374-386 doi: 10.1007/s11709-019-0600-0

Abstract: Modeling and prediction of bed loads is an important but difficult issue in river engineering. The introduced empirical equations due to restricted applicability even in similar conditions provide different accuracies with each other and measured data. In this paper, three different artificial neural networks (ANNs) including multilayer percepterons, radial based function (RBF), and generalized feed forward neural network using five dominant parameters of bed load transport formulas for the Main Fork Red River in Idaho-USA were developed. The optimum models were found through 102 data sets of flow discharge, flow velocity, water surface slopes, flow depth, and mean grain size. The deficiency of empirical equations for this river by conducted comparison between measured and predicted values was approved where the ANN models presented more consistence and closer estimation to observed data. The coefficient of determination between measured and predicted values for empirical equations varied from 0.10 to 0.21 against the 0.93 to 0.98 in ANN models. The accuracy performance of all models was evaluated and interpreted using different statistical error criteria, analytical graphs and confusion matrixes. Although the ANN models predicted compatible outputs but the RBF with 79% correct classification rate corresponding to 0.191 network error was outperform than others.

Keywords： bed load prediction     artificial neural network     modeling     empirical equations    

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Sorption of tetracycline to sediments and soils: assessing the roles of pH, the presence of cadmium andproperties of sediments and soils

Guixiang ZHANG, Xitao LIU, Ke SUN, Ye ZHAO, Chunye LIN

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 421-429 doi: 10.1007/s11783-010-0265-3

Abstract: sorption experiments were conducted to evaluate the sorption behavior of tetracycline (TC, H L) on sedimentsand soils in the presence and absence of cadmium (Cd), as affected by pH and properties of sedimentsThe results indicated stronger nonlinearity and higher capacity of TC sorption on sediments than on soilsThe presence of Cd (II) increased TC sorption on both sediments and soils, which resulted from the decrease

Keywords： sorption     tetracycline (TC)     pH     cadmium (Cd)     antibiotic    

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The Difference Effect of Environmental Regulation on Two Stages of Technology Innovation in China’s Manufacturing

Bao-long Yuan,Sheng-gang Ren,Xing Hu,Xuan-yu Yang

Frontiers of Engineering Management 2016, Volume 3, Issue 1,   Pages 24-29 doi: 10.15302/J-FEM-2016007

Abstract: This paper divides technological innovation into two stages: technology development and technology transfermanufacturing industries during 2003–2012 to test the econometric regression model for the industry of the sub stages

Keywords： environmental regulation     technology innovation     stage difference     manufacturing    

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Development of small-molecule viral inhibitors targeting various stages of the life cycle of emerging

Xiaohuan Wang, Peng Zou, Fan Wu, Lu Lu, Shibo Jiang

Frontiers of Medicine 2017, Volume 11, Issue 4,   Pages 449-461 doi: 10.1007/s11684-017-0589-5

Abstract:

In recent years, unexpected outbreaks of infectious diseases caused by emerging and re-emerging viruses have become more frequent, which is possibly due to environmental changes. These outbreaks result in the loss of life and economic hardship. Vaccines and therapeutics should be developed for the prevention and treatment of infectious diseases. In this review, we summarize and discuss the latest progress in the development of small-molecule viral inhibitors against highly pathogenic coronaviruses, including severe acute respiratory syndrome coronavirus and Middle East respiratory syndrome coronavirus, Ebola virus, and Zika virus. These viruses can interfere with the specific steps of viral life cycle by blocking the binding between virus and host cells, disrupting viral endocytosis, disturbing membrane fusion, and interrupting viral RNA replication and translation, thereby demonstrating potent therapeutic effect against various emerging and re-emerging viruses. We also discuss some general strategies for developing small-molecule viral inhibitors.

Keywords： emerging and re-emerging viruses     small-molecule inhibitor     coronavirus     Ebola virus     Zika virus     life cycle    

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implications of planting mode on cadmium uptake and remobilization in rice: Field experiments across growth stages

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1431-5

Abstract:

•Direct seeding (DS) method led to more distributed Cd in aerial parts of rice.

Keywords： Cadmium     Genotypes     Growth stages     Micro X-ray fluorescence     Planting mode    

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Assessment on contaminations in sediments of an intake and the inflow canals in Taihu Lake, China

Xiaolong WANG,Shiming DING,Qi ZHANG,Weiping HU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 665-674 doi: 10.1007/s11783-014-0701-x

Abstract: In the present study, we investigated the contaminations of nutrients and heavy metals in the sedimentsHowever, the concentrations of Cr, Ni, Cu, Zn and Pb in the sediments of the intake exceeded the lowestIn addition, the concentrations of Ni in the sediments of Tianji Canal and Jinshu Canal exceeded theMore importantly, the concentrations of Cu in the sediments of Tianji Canal exceeded three times of thenutrient accumulation, and the leakage of electronic trash dominated the enrichment of metals in the sediments

Keywords： drinking water resource     nutrients     heavy metals     sediments     Taihu Lake    

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The temporal changes of the concentration level of typical toxic organics in the river sediments around

Qiang Li, Xiong Xu, Yaoyao Fang, Ruiyang Xiao, Donghong Wang, Wenjue Zhong

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 6, doi: 10.1007/s11783-018-1054-7

Abstract:

The current situation of typical organics in the sediments around

The change of different organics in the sediments

Keywords： Organic compounds     Endocrine disrupters     Sediments     Concentration     Temporal changes    

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Unstressed state control method for process control of structure formed by stages

Qin Shunquan

Strategic Study of CAE 2009, Volume 11, Issue 10,   Pages 72-78

Abstract: establishes a mechanical equilibrium equation for structure in any construction process of bridge formed by stagesstructural elements provides a solution to the problem of rection calculation for bridge constructed by stages

Keywords： bridge constructed by stages     unstressed length     unstressed curvature     parallel operation     erection calculation    

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Recent advances in pharmaceuticals and personal care products in the surface water and sediments in China

Wentao Zhao, Ying Guo, Shuguang Lu, Pingping Yan, Qian Sui

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0868-4

Abstract: Higher risks were posed by PPCPs in sediments than in surface water.It includes PPCP occurrence in surface water and sediments, their geographical distribution, and outcomesIt shows that antibiotics have received much more attention in both surface water and sediments thanDespite limited research on the environmental risk assessment of PPCPs in sediments, higher risks posedby PPCPs in the sediments rather than surface water were identified highlighting the need for further

Keywords： Surface water     Sediment     Antibiotics     Geographical distribution     Risk assessment    

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Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands: From sediments, rhizosphere to

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1523-x

Abstract:

• In sediments, the transformation of sulfides may lead to the release

Keywords： Coastal wetland     Heavy metal     Sulfur     Biogeochemical cycle    

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Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater

Ruiping LIU, Wei XU, Kun WU, Wenxin GONG, Huijuan LIU, Jiuhui QU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 568-578 doi: 10.1007/s11783-013-0514-3

Abstract: significantly increased levels of arsenic in water; however, the species distribution of arsenic in sedimentsbinding phases of arsenic (i.e., water soluble, ion-exchangeable, strongly-bound, and precipitates) in sedimentsThe content of arsenic in the sediments was relatively low and the maximum content was observed to beAs(III) and As(V) showed different binding phases in sediments, and the average fractions of these fourthe sediment samples, the content of arsenic showed no relationship with the characteristics of the sediments

Keywords： river sediments     arsenic     species distribution     binding phases     unexpected discharge of high-As wastewater    

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Characterization of phosphorus species and modeling for its organic forms in eutrophic shallow lake sediments

Hongguang CHENG,Xiao PU,Yiting CHEN,Fanghua HAO,Liming DONG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 905-921 doi: 10.1007/s11783-014-0650-4

Abstract: Variations of phosphorus (P) and its species in surface sediment of Baiyangdian Lake, a eutrophic shallow lake located in North China, were investigated through combination of field survey and numerical calculation based on cluster analysis. P fractionation was performed by a sequential extraction scheme, categorized as loosely bound P (NH Cl-P), reductant soluble P (BD-P), metallic oxide bound P (NaOH-P), calcium bound P (HCl-P) and organic P (Org-P). P concentrations exhibited regional similarities and a total of four sub-areas were identified in which the same rank was HCl-P>Org-P>BD-P ≈ NaOH-P>NH Cl-P. NH Cl-P, BD-P and Org-P were found to contribute to P enrichment in overlying water column. Specifically, labile Org-P acted as a potential pool with a greater contribution in aerobic layer compared to anaerobic layer. A hysteresis (lag= 4 months) existed when labile Org-P concentration was negatively correlated with aerobic layer thickness. In view of magnitude of identified P contributors in sub-areas, higher potential of P release was present in Fuhe River and Tang River estuary areas. On the basis of calibration and verification, the mathematical model with parameter settings applied in this study was improved to serve as a tool for limnology management and eutrophic control.

Keywords： phosphorus fractionation     variation characteristics     modeling     sediment     Baiyangdian Lake    

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Transferral of HMs pollution from road-deposited sediments to stormwater runoff during transport processes

Qian Wang, Qionghua Zhang, Mawuli Dzakpasu, Nini Chang, Xiaochang Wang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 1, doi: 10.1007/s11783-019-1091-x

Abstract:

Ratio of turbidity and TSS (Tur/TSS) was used to characterize PSD of stormwater particles.

Pb and Zn preferred to accumulate in finer RDS, while Cu, Cr and Ni in coarser RDS.

HMs pollution in stormwater particles increased linearly with Tur/TSS.

Dissolvability of HMs and PSD variations contribute to the differences between RDS and stormwater.

Keywords： Road-deposited sediment     Stormwater runoff     Heavy metal     Particle size     Pollution variation    

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Title Author Date Type Operation

The age measurese and its layer sequence stratigraphy of Late Quaternary sediment in Lushan Dajiaochang of China

Hu Dongsheng,Hu Rong,Li Xiaoyu,Hu Wenxuan,Wang Xulong,Tian Xinhong,Liu Weiguo,Zhang Guowei

Journal Article

Adsorption and partition of benzo(a)pyrene on sediments with different particle sizes from the Yellow

XIA Xinghui, HU Lijuan, MENG Lihong

Journal Article

Prediction of bed load sediments using different artificial neural network models

Reza ASHEGHI, Seyed Abbas HOSSEINI

Journal Article

Sorption of tetracycline to sediments and soils: assessing the roles of pH, the presence of cadmium andproperties of sediments and soils

Guixiang ZHANG, Xitao LIU, Ke SUN, Ye ZHAO, Chunye LIN

Journal Article

The Difference Effect of Environmental Regulation on Two Stages of Technology Innovation in China’s Manufacturing

Bao-long Yuan,Sheng-gang Ren,Xing Hu,Xuan-yu Yang

Journal Article

Development of small-molecule viral inhibitors targeting various stages of the life cycle of emerging

Xiaohuan Wang, Peng Zou, Fan Wu, Lu Lu, Shibo Jiang

Journal Article

implications of planting mode on cadmium uptake and remobilization in rice: Field experiments across growth stages

Journal Article

Assessment on contaminations in sediments of an intake and the inflow canals in Taihu Lake, China

Xiaolong WANG,Shiming DING,Qi ZHANG,Weiping HU

Journal Article

The temporal changes of the concentration level of typical toxic organics in the river sediments around

Qiang Li, Xiong Xu, Yaoyao Fang, Ruiyang Xiao, Donghong Wang, Wenjue Zhong

Journal Article

Unstressed state control method for process control of structure formed by stages

Qin Shunquan

Journal Article

Recent advances in pharmaceuticals and personal care products in the surface water and sediments in China

Wentao Zhao, Ying Guo, Shuguang Lu, Pingping Yan, Qian Sui

Journal Article

Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands: From sediments, rhizosphere to

Journal Article

Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater

Ruiping LIU, Wei XU, Kun WU, Wenxin GONG, Huijuan LIU, Jiuhui QU

Journal Article

Characterization of phosphorus species and modeling for its organic forms in eutrophic shallow lake sediments

Hongguang CHENG,Xiao PU,Yiting CHEN,Fanghua HAO,Liming DONG

Journal Article

Transferral of HMs pollution from road-deposited sediments to stormwater runoff during transport processes

Qian Wang, Qionghua Zhang, Mawuli Dzakpasu, Nini Chang, Xiaochang Wang

Journal Article