Suspended sediment concentration and particle size distribution, and their relationship with heavy metal content

A new focused ultrasonic sensor is proposed, based on which the measurement system for particle size distribution measurement of suspended sediment is established. Compared with the traditional ultrasonic sensors, the one used in this paper is equipped with piezoelectric transducer (PZT) on an arc-shaped shell, to concentrate ultrasonic beams on one measurement point. The sensor is used to measure the particle size distribution of suspended sediment. The experiments were carried out on water-sediment mixtures with different particle size distribution. Due to multiple parameters and non-linearity of the ultrasonic attenuation model, the artificial bee colony (ABC) inversion algorithm is used to estimate particle size distribution, thus improving measurement accuracy. The particle sizes obtained by sieving method are seen as reference values. The results indicate that whether the suspended particles are subject to a unimodal distribution, uniform distribution or random distribution, the particle size distribution obtained by ABC inversion algorithm is consistent with the result obtained by the sieve method. The results demonstrate that the method has good utility and accuracy within the low concentration range.

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The correlations of the particle size, calorific value, moisture- and ash content of waste derived fuel, and examination of its heavy metal content

Analecta Technica Szegedinensia ◽

10.14232/analecta.2020.1.109-117 ◽

2020 ◽

Vol 14 (1) ◽

pp. 109-117

Author(s):

Csaba Leitol ◽

Alexandra Győrfi ◽

Tibor Kiss

Keyword(s):

Heavy Metal ◽

Particle Size ◽

Metal Content ◽

Power Plants ◽

Waste Treatment ◽

Calorific Value ◽

Heavy Metal Content ◽

Particle Size Fractions ◽

Measurement Results ◽

Biological Waste Treatment

Significant development has taken place in the field of waste management recently in the preparation of the energetic exploitation of recyclable, non-hazardous municipal solid waste. With mechanical-biological waste treatment, 35-40% of the weight of this waste can be made appropriate for energetic exploitation, mainly for co-incineration in cement factories and power plants. The recoverability of waste derived fuel produced in mechanical-biological waste treatment plants highly depends on the burning and combustion technological properties of the mixture, and on its compounds influencing burning and different emissions. Waste recovery facilities do not take over fuel below a specific calorific value and over a given heavy metal, halogen and pollutant content. In our research we were looking for correlations in the particle size, calorific value, moisture-, ash- and heavy metal content of waste derived fuel. On the basis of the measurement results, the connection between the particle size fractions and the fuel properties can clearly be stated. The fractions of smaller particle size have higher moisture-, ash- and heavy metal content, while the fractions of bigger particle size have higher calorific value.

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Changes in particle size distribution of suspended sediment affected by gravity erosion: a field study on steep loess slopes

Journal of Soils and Sediments ◽

10.1007/s11368-019-02496-z ◽

2019 ◽

Vol 20 (3) ◽

pp. 1730-1741 ◽

Cited By ~ 3

Author(s):

Wenzhao Guo ◽

Xiangzhou Xu ◽

Tongxin Zhu ◽

Hongwu Zhang ◽

Wenlong Wang ◽

...

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Field Study ◽

Size Distribution ◽

Suspended Sediment

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Effect of Water Temperature on Suspended Sediment Concentration and Particle Size in Ionized Water

Iranian Journal of Science and Technology Transactions of Civil Engineering ◽

10.1007/s40996-020-00460-3 ◽

2020 ◽

Vol 44 (S1) ◽

pp. 355-360

Author(s):

Sivakumar Ramalingam ◽

Venu Chandra

Keyword(s):

Particle Size ◽

Water Temperature ◽

Suspended Sediment ◽

Suspended Sediment Concentration ◽

Sediment Concentration ◽

Effect Of Water

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Sediment transport modelling in riverine environments: on the importance of grain-size distribution, sediment density and boundary conditions

10.5194/hess-2018-511 ◽

2018 ◽

Author(s):

Jérémy Lepesqueur ◽

Renaud Hostache ◽

Núria Martínez-Carreras ◽

Emmanuelle Montargès-Pelletier ◽

Christophe Hissler

Keyword(s):

Grain Size ◽

Sediment Transport ◽

Size Distribution ◽

Suspended Sediment ◽

Grain Size Distribution ◽

Suspended Sediment Concentration ◽

Sediment Concentration ◽

Small Scale ◽

Sediment Grain Size ◽

Model Based

Abstract. Hydromorphodynamic models are powerful tools to predict the potential mobilization and transport of sediment in river ecosystems. Recent studies even showed that they are able to satisfyingly predict suspended sediment matter concentration in small river systems. However, modelling exercises often neglect suspended sediment properties (e.g. particle site distribution and density), even though such properties are known to directly control the sediment particle dynamics in the water column during rising and flood events. This study has two objectives. On the one hand, it aims at further developing an existing hydromorphodynamic model based on the dynamic coupling of TELEMAC-3D (v7p1) and SISYPHE (v7p1) in order to enable an enhanced parameterisation of the sediment grain size distribution with distributed sediment density. On the other hand, it aims at evaluating and discussing the added-value of the new development for improving sediment transport and riverbed evolution predictions. To this end, we evaluate the sensitivity of the model to sediment grain size distribution, sediment density and suspended sediment concentration at the upstream boundary condition. As a test case, the model is used to simulate a flood event in a small scale river, the Orne River in North-eastern France. The results show substantial discrepancies in bathymetry evolution depending on the model setup. Moreover, the sediment model based on an enhanced sediment grain size distribution (10 classes) and with distributed sediment density outperforms the model with only two sediment grain size classes in terms of simulated suspended sediment concentration.

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