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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).

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    

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    

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    

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    

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    

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    

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    

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    

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    

Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

Jinghuan ZHANG, Mengchang HE, Chunye LIN, Ke SUN, Bin MEN, John L. ZHOU,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 434-442 doi: 10.1007/s11783-009-0150-0

Abstract: Black carbon (BC) in ten contaminated sediments from the Song-Liao watershed, NE China, was isolatedsorption nonlinearity parameter ( values) and BC/total organic carbon (TOC) content of the original sedimentsAt a given , the BC had higher value than the original sediments, revealing a higher sorption capacitysorption at =0.05 , clearly indicating the dominance of BC particles in overall sorption of Phen by sediments

Keywords: phenanthrene     sorption     black carbon     sediment     Song-Liao watershed    

Different response of bacterial community to the changes of nutrients and pollutants in sediments from

Fang Zhang, Hao Zhang, Ying Yuan, Dun Liu, Chenyu Zhu, Di Zheng, Guanghe Li, Yuquan Wei, Dan Sun

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1207-3

Abstract: • Bacterial community varied spatially in sediments from the urban river network. • Key environmentalHowever, how the diversity and structure of bacterial communities in sediments from an urban river networkThe goal of this study was to understand the patterns of bacterial communities in sediments from a highlyThe diversity and richness of bacterial community in sediments increased from upstream to downstreamZn, Cu, Hg and As were selected as the key environmental factors shaping the bacterial community in sediments

Keywords: Sediment     Urban river network     Bacterial community     Network analysis     Indicator species    

Spatial distribution of phosphorus forms in sediments with different distances to the estuary of the

Shaoyong LU, Xiangcan JIN, Fengchang WU, Jing SI, Jianning GUO,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3,   Pages 295-300 doi: 10.1007/s11783-010-0231-0

Abstract: Effects of human activity on the distribution of phosphorus (P) forms were investigated for the sedimentsinorganic-P (I-P), and organic-P (Org-P), and the ratio of iron-bound P (Fe-P)/calcium-bound P (Ca-P) in the sedimentsPollution load and water quantity also had an important influence on the concentrations of P in sediments

Keywords: estuary sedimentary area     phosphorus (P)     spatial distribution     human activity     the Dianchi Lake    

Analysis and assessment of heavy metal contamination in surface water and sediments: a case study from

Zhaoming WANG,Ranhao SUN,Haiping ZHANG,Liding CHEN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 240-249 doi: 10.1007/s11783-014-0646-0

Abstract: away from the river also suggests that anthropogenic activities contribute to heavy metal pollution Sediments

Keywords: heavy metal     water     sediment     geo-accumulation index     Luan River    

Fundamental characteristics of gas hydrate-bearing sediments in the Shenhu area, South China Sea

Xin LYU, Qingping LI, Yang GE, Junlong ZHU, Shouwei ZHOU, Qiang FU

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 367-373 doi: 10.1007/s11708-020-0714-z

Abstract: The basic physical properties of marine natural gas hydrate deposits are important to the understanding of seabed growth conditions, occurrence regularity, and occurrence environment of natural gas hydrates. A comprehensive analysis of the core samples of drilling pressure-holding hydrate deposits at a depth of 1310 m in the Shenhu area of the South China Sea was conducted. The experimental results indicate that the particle size in the hydrate sediment samples are mainly distributed in the range from 7.81 µm to 21.72µm, and the average particle size decreases as the depth of the burial increases. The X-ray CT analytical images and surface characteristics SEM scan images suggest that the sediment is mostly silty clay. There are a large number of bioplastics in the sediment, and the crack inside the core may be areas of hydrate formation.

Keywords: natural gas hydrate     Shenhu area     reservoirs characteristics    

Title Author Date Type Operation

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

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

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

Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

Jinghuan ZHANG, Mengchang HE, Chunye LIN, Ke SUN, Bin MEN, John L. ZHOU,

Journal Article

Different response of bacterial community to the changes of nutrients and pollutants in sediments from

Fang Zhang, Hao Zhang, Ying Yuan, Dun Liu, Chenyu Zhu, Di Zheng, Guanghe Li, Yuquan Wei, Dan Sun

Journal Article

Spatial distribution of phosphorus forms in sediments with different distances to the estuary of the

Shaoyong LU, Xiangcan JIN, Fengchang WU, Jing SI, Jianning GUO,

Journal Article

Analysis and assessment of heavy metal contamination in surface water and sediments: a case study from

Zhaoming WANG,Ranhao SUN,Haiping ZHANG,Liding CHEN

Journal Article

Fundamental characteristics of gas hydrate-bearing sediments in the Shenhu area, South China Sea

Xin LYU, Qingping LI, Yang GE, Junlong ZHU, Shouwei ZHOU, Qiang FU

Journal Article