Dredged materials in Morocco: Current practices, policies, and roadmap for sustainable management

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 20, P. e03045 - e03045

Published: March 13, 2024

Dredging is essential for maintaining navigable waters in ports, rivers, and dams, but it faces environmental scrutiny as the push industrial circularity intensifies. The management of dredged materials (DMs) presents a unique challenge opportunity, especially Morocco, where there notable gap research application. This paper conducts two-pronged exploration: critically assesses Morocco's legislative environment concerning DMs, highlighting its strengths shortcomings, evaluates potential DMs civil engineering projects, illustrating their alignment with 11 17 UN Sustainable Development Goals. Central to this stakeholder survey that sheds light on perceived benefits, obstacles, socio-political hindrances DM adoption construction sector. In exploration DMs' advantageous applications, identified key challenges utilization management. Market entry DM-derived products impeded by absence standardized safety regulations. Additionally, transportation costs represent substantial practical hurdle leverage beneficially. Nonetheless, exists discernible willingness among end users adopt containing within operations, despite prevalent lack awareness regarding intrinsic benefits properties DMs. Collectively, study not only vivid snapshot Morocco also charts pathway researchers, policymakers, industry stakeholders collaboratively champion sustainable circular economy practices dredging

Language: Английский

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Enhancing Phytoextraction Potential of Brassica napus for Contaminated Dredged Sediment Using Nitrogen Fertilizers and Organic Acids

Plants, Journal Year: 2024, Volume and Issue: 13(6), P. 818 - 818

Published: March 13, 2024

Dredged sediment contaminated with heavy metals can be remediated through phytoremediation. The main challenge in phytoremediation is the limited availability of for plant uptake, particularly multi-contaminated soil or sediment. This study aimed to assess effect nitrogen fertilizers (ammonium nitrate (AN), ammonium sulfate (AS), and urea (UR)), organic acids (oxalic (OA) malic (MA) acids), their combined addition on enhancing bioavailability efficiency metals. dredged from Begej Canal (Serbia) had high levels Cr, Cd, Cu, Pb was used pot experiments cultivate energy crop rapeseed (Brassica napus), which known its tolerance highest accumulation translocation were observed treatment AN at a dose 150 mg N/kg (AN150), shoot biomass also highest. application OA MA increased metal uptake but resulted lowest production. A combination N showed Cr Cu.

Language: Английский

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Assessment of harbor sediment contamination for a path to valorize dredged material

Arabian Journal of Chemistry, Journal Year: 2023, Volume and Issue: 16(11), P. 105208 - 105208

Published: Sept. 1, 2023

Annually, over one billion m3 of sediment are dredged worldwide to ensure safe access for ships harbors. Dredged from harbors, considered as waste, presents an interesting opportunity sustainable development projects by valorizing it construction material. Characterizing material is a crucial step confirm the feasibility reusing marine and identifying potential valorization pathways. However, previous studies have primarily focused on investigating properties at physical, geotechnical, mineralogical level, with limited analysis presence chemical contaminants, despite their impact assessing quality substitute aggregate. The aim this paper evaluate contamination Safi harbor, located in central Morocco urbanized industrialized area. Determining contaminant content prerequisite process. To achieve objective, characteristics collected six different sampling points studied. On hand, concentrations following trace metals measured: Cadmium (Cd), Arsenic (As), Chromium (Cr), Nickel (Ni), Lead (Pb), Copper (Cu) Zinc (Zn). other Total Petroleum Hydrocarbons (TPH) Organic Carbon (TOC) analyzed. results show that reference values studied contaminants not exceeded port channel. These findings indicate alternative source materials.

Language: Английский

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Multiscale Process Intensification of Waste Valorization Reactions

Accounts of Chemical Research, Journal Year: 2023, Volume and Issue: 56(19), P. 2606 - 2619

Published: Sept. 15, 2023

ConspectusThe central theme of this Account is the development intensified and sustainable chemical processes for sequestration CO2 in synergism with utilization wastes industrial, urban, agricultural origins. A challenge when working solid waste–fluid reactions that mass transfer limitations across solid–liquid, solid–gas, gas–liquid interfaces unfavorable thermodynamics lead to slow reaction rates, incomplete conversions, high energy expenditure processing costs, inadequate product properties. The traditional macroscale approaches overcoming slurry can be effective; however, they come at a cost environment. In treatment or valorization low-grade waste resources, such conventional are often unfeasible on an industrial scale. Sustainable solutions thus needed.In last six years, we have been exploring developing rate environmental relevance by concurrently applying process intensification strategies multiscale engineering approaches. scientific approach has relied laboratory-scale experiments test refine devised strategies, thermodynamic computational modeling work supporting experimental advanced characterization techniques being used elucidate transport mechanisms aid nanoscale models micro- models. research streams, associated four key references, discussed next (a) brine carbonation; (b) mineral carbonation enhanced weathering; (c) integration; (d) techniques.Within number investigated classified as (i) ambient weathering (ii) gas-(wet) accelerated (iii) aqueous (iv) supercritical (v) mineralization from brine. some cases, was aimed producing valuable products reduced risk carbon footprint, organomineral fertilizer zeolites. other aim assess reactivity minerals match right feedstock process, view maximizing net sequestration. There were also cases where reimagined use innovative conditions, reactors, reagents. experience engineered translated into field rock (ERW) agriculture, multidisciplinary served advance ERW science technology ways had resounding effect recent commercial deployment.The completed serves encourage adoption technologies place processes, industry among community, catalyze types required chemical, metallurgical, industries (which critical green transition) reduce their impact emissions. Moreover, developed may extended reduction intensity, footprint could achieved.

Language: Английский

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Green Solutions to Valorize Marine Dredged Sediments as an Anthropogenic Geomaterial

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116219 - 116219

Published: March 1, 2025

Language: Английский

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A review on beneficial use of dredged marine sediment

Anthropocene Coasts, Journal Year: 2025, Volume and Issue: 8(1)

Published: April 27, 2025

Language: Английский

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Some aspects of the compaction of raw dredged sediments for a direct reuse as fill material

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: April 29, 2025

Language: Английский

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Study of the impact of sediments on the mechanical behavior of concrete and towards the penetration of carbon dioxide

STUDIES IN ENGINEERING AND EXACT SCIENCES, Journal Year: 2024, Volume and Issue: 5(1), P. 3022 - 3055

Published: June 18, 2024

Dam reservoirs are exposed to a loss of water storage capacity due the phenomenon siltation. This particularity can be expressed by siltation and entrainment particles transported watercourses. Siltation is critical state which causes reduction in dams. Algeria characterized semi-arid climate, annually loses considerable volume storage. The carbonation concrete influenced number parameters accelerate its kinetics. These porosity concrete, quantity lime contained cement, concentration CO2 atmosphere humidity environment. It should noted that, being vector for moving aggressive agents, carbon dioxide only diffuse through if latter not completely saturated perfectly dry at same time. Another factor increasing permeability amount limestone added cement during manufacture factory. allows diffusion or other agents concrete. addition must therefore used with caution. objective propose economically competitive easy-to-implement formulations allow valorization these materials making ordinary partial substitution (10, 20 30%) influence on progress long-term after six years curing open air. sediment treated calcination 750°C make it active. Natural tests were carried out study concretes order evaluate their durability. results obtained confirmed possibility producing incorporating calcined sludge dosages up 30% without compromising quality from point view behavior face attacks dissolution air interstitial solution meeting economic, ecological technological objectives.

Language: Английский

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A Critical Review of the Crucial Role of the Yellow River’s Sediment in the Interfacial Migration and Fate of Pollutants and Prospects for the Application of Environmental Sediment Restoration

Toxics, Journal Year: 2024, Volume and Issue: 12(9), P. 669 - 669

Published: Sept. 14, 2024

Considering the increasing sediment content and flux of Yellow River over years, it is significance to investigate potential interfacial force mechanism between pollutants sediment. This article has reviewed current research on sediments’ mineral structures while investigating interaction in water environment. conducted a comprehensive analysis influence migration What more, authors have provided an outlook future applications ecological environmental systems. mainly included minerals some clay phases, its irregular surface sites for interface adsorption pollutants. The attributed promoting bacterial growth sediments, physisorption, chemisorption forces. sediments carry transport during long-distance flow process. should be effectively utilized better integrated into or restoration provides reference studying behavior direction efficient utilization.

Language: Английский

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Biochar-Supported Phytoremediation of Dredged Sediments Contaminated by HCH Isomers and Trace Elements Using Paulownia tomentosa

Sustainability, Journal Year: 2024, Volume and Issue: 16(20), P. 9080 - 9080

Published: Oct. 20, 2024

The remediation of dredged sediments (DS) as a major waste generation field has become an urgent environmental issue. In response to the limited strategies restore DS, current study aimed investigate suitability Paulownia tomentosa (Thunb.) Steud tool for decontamination both independently and in combination with sewage sludge-based biochar. experimental design included unamended biochar-supplemented DS application rates 2.5, 5.0, 10.0%, which vegetation P. was monitored. results confirmed that incorporation biochar enriched essential plant nutrients (P, Ca, S), stimulated biomass yield improved plant’s photosynthetic performance by up 3.36 80.0 times, respectively; observed effects were correlated rates. addition, enhanced phytostabilisation organic contaminants shifted primary accumulation potentially toxic elements from aboveground roots. spite inspiring results, further research concentrate on investigation mechanisms improvement development depending biochar’s properties rate studying mitigation explored system.

Language: Английский

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