Regenerative Energie
Dredging of several hundred million cubic meters of sediments each year from harbors and waterways is mandatory in order to maintain the efficiency of the navigation system. Presently, the most common approach to management of dredged sediments is generally limited to dumping into confined disposal facilities (CDFs), but this solution could create potential concerns such as contaminant exposure and slow dewatering/consolidation (Reddy et al., 2006); in addition, disposal is space-consuming and proper sites can be difficult to find (Nystroem et al., 2006). Conversely, dredged sediments could be used in a valuable way, such as for habitat restoration and creation, beach nourishment, industrial and commercial development, enlargement of harbors and other coastal structures.
In the present work two processes were applied for the treatment of real heavy metal-contaminated sea sediment. Ethylendiaminetetraacetic acid (EDTA), acetic acid and nitric acid were used for washing, while deionized water, EDTA and nitric acid were employed as circulating solutions during electrokinetic treatment. The results indicated that the remediation efficiency can be significantly affected by the liquid to solid ratio adopted or achievable during the applied process, as well as by the speciation of metals and the buffer capacity of the material. The use of nitric acid in both the investigated treatments allowed the achievement of the highest removal efficiency.
| Copyright: | © IWWG International Waste Working Group |
| Quelle: | Specialized Session D (Oktober 2007) |
| Seiten: | 13 |
| Preis: | € 13,00 |
| Autor: | Giorgia de Gioannis Aldo Muntoni Martina Piredda |
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Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau
der Wasserstoffinfrastruktur in Deutschland
Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens
- ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.
Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit