From dredged sediment to supplementary cementitious material: characterization, treatment, and reuse

Amar, Mouhamadou; Benzerzour, M.; Kleib, Joelle; Abriak, N.‐E.

doi:10.1016/j.ijsrc.2020.06.002

Cited by 70 publications

(39 citation statements)

References 125 publications

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“…Considerable volumes of sediments are dredged annually in the world (Dubois et al, 2009). In China, more than 100 million m 3 of sediment are dredged per year (Amar et al, 2021). However, due to the potential content of toxic substances in the sediment, how to dispose of the sediment is a key problem.…”

Section: Introductionmentioning

confidence: 99%

“…Bene cial reuse of dredge sediment is a growing practice worldwide (Cappuyns et al, 2015;Wang et al, 2015;Mymrin et al, 2017;Amar et al, 2021). Sediment was used to be processed at high temperature, producing concrete (Tay et al, 2001;Agostini et al, 2007;Benzerzour et al, 2017), bricks (Lim et al, 2019), and ceramsite (Qi et al, 2016;Jin et al, 2019) instead of clay due to its ne particles, strong plasticity and binding force.…”

Section: Introductionmentioning

confidence: 99%

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A new Fe-C porous filter material from dredged sediment: preparation, characterization, and its application

Chu

Pan

et al. 2021

Environ Sci Pollut Res

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A new Fe-C porous lter material was prepared with dredged sediment of river as raw material. The orthogonal test L 9 (3 4 ) and component ratio experiment of raw material were conducted to investigate the optimum technological condition. Further, the lter obtained was characterized by Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), energy dispersive X-ray spectroscope (EDS), and X-ray diffraction (XRD). Results showed that the optimal technological condition was sludge: straw: starch: iron powder: foam: iron powder 74.5∶10∶7.5∶3∶5, preheating temperature 280 ℃, preheating 15 min, sintering temperature 1080 ℃, and sintering 11 min. The BET surface area of the lter was 3.32 m 2 g − 1 , and average pore size was 10.05 nm. Phase composition mainly included SiO 2 , Fe 3 O 4 , Fe 2 O 3 and muscovite (KAl 2 (Si 3 Al)O 10 (OH) 2 ). Average e uent concentrations of total phosphorus (TP), total organic carbon (TOC), and total nitrogen (TN) of the bio lter system lled with the lter obtained were decreased to 0.08, 3.43, and 3.76 mg L − 1 , separately, at hydraulic retention time 4 h. Thus, the lter prepared with dredged sediment of rive as raw material is an alternative material for polluted river water puri cation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new Fe-C porous filter material from dredged sediment: preparation, characterization, and its application

Chu

Pan

et al. 2021

Environ Sci Pollut Res

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“…Dredged sludge is the soil with high moisture content coming from the dredging marine operation in continental watercourses, and is formed by particles introduced into the ecosystem, and precipitates formed by biochemical processes in aquatic environments [1]. Considerable volumes of sediments are dredged annually all over the world.…”

Section: Introductionmentioning

confidence: 99%

“…Considerable volumes of sediments are dredged annually all over the world. Annually, over 100 million tons of sludge are dredged in China [2], against about 230 million tons in the USA [3], and 200 million tons in Western Europe [1]. Treating these huge amounts of sediments is a major challenge, and in the past, dredged sludge was dumped directly at sea in many coastal countries, which potentially deteriorated the benthic environment of the dumping sites, and consequently affected the ecosystems [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, dewatering consumes extra energy to overcome the binding energy between distinct forms of moisture and sludge. Currently, the large-scale applied dewatering technologies include mechanical, thermal and chemical drying [1,10,20,21], and energy cost is one of the most important factors in the selection of these processing techniques. Although many technologies have been commercially used for sludge drying, there still lacks a fundamental model to quantitatively describe the binding energy needed to be overcome during drying.…”

Section: Introductionmentioning

confidence: 99%

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Measurement and Modelling of Moisture Distribution and Water Binding Energy of Dredged Sludge

Mao

Zhao

Zhang

et al. 2020

Water

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The dewatering of dredged sludge is a critical step in the minimization and reutilization of this solid waste. However, there is a lack of available literature on the fundamental drying characteristics of dredged sludge. In this work, two kinds of typical sludge dredged from an urban watercourse were tested by low-field NMR to investigate the water distribution in sludge and it was found that water contained in sludge can be classified into three categories: free water, capillary water and bound water. In addition, a novel model was proposed based on the Lennard-Jones equation and Kelvin law to quantitatively evaluate the binding energy during drying. Further, the model results were experimentally verified by thermogravimetry differential thermal analysis (TG-DTA). Results show that the trends of the model are consistent with the experimental values and the gradient of energy consumption during dehydration can be divided into three main stages. In stage 1, the total energy required for dewatering equals the latent heat of free water. In stage 2, binding energy reaches dozens to hundreds of kJ/kg accounting for capillary action. In stage 3, binding energy increases steeply reaching almost thousands of kJ/kg due to intermolecular interactions. All the discovered aspects could improve the management and disposal of dredged sludge from an energy cost perspective.

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Recycling of Construction Components and Corresponding Sectors

MECHLING,

DILIBERTO,

BRAYMAND

et al. 2024

Recycling, a Challenge for the Circular Economy

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From dredged sediment to supplementary cementitious material: characterization, treatment, and reuse

Cited by 70 publications

References 125 publications

A new Fe-C porous filter material from dredged sediment: preparation, characterization, and its application

A new Fe-C porous filter material from dredged sediment: preparation, characterization, and its application

Measurement and Modelling of Moisture Distribution and Water Binding Energy of Dredged Sludge

Recycling of Construction Components and Corresponding Sectors

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