Interaction dynamics between a contaminated dredged sediment and extracting solutions of different nature
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The purpose of this work is to study the dynamics between the matrix of a contaminated marine sediment, its contaminants and various desorbing solutions by means of equilibrium tests, sedimentation trials and zeta potential, with the focus on assessing optimum enhancing solutions for decontamination purposes.
Materials and methods
The sediment samples were analysed to determine their physico-chemical characteristics: particle size distribution, solids concentration, total organic carbon (TOC), content of heavy metals, organic contaminants, mineralogical phases, zeta potential and buffer capacity. Twelve extracting solutions of different nature were used for equilibrium tests, in which the dynamic behaviour of the sediment was evaluated. Elemental analysis was carried out for the sediment samples and the solutions before and after the tests.
Results and discussion
The sediment was mainly composed of clay and lime, with a high content of iron, which has a strong influence on sorption-desorption processes. The sediment had a considerable buffer capacity at low and high pH values. The desorption of the metals was not proportional to pH. The highest decrease in the concentration of metals from the sediment was obtained with 0.2 M ethylenediaminetetra-acetic acid (EDTA) and 1 M nitric acid, while the lowest degree of metal extraction occurred in pure water and potassium iodide (KI).
The most important parameters for contaminant release were complexation ability of the solution for the sediment components and pH of the solution. A promising design for the remediation treatment for the investigated sediment includes complexation and strong acid agents.
KeywordsDredged sediment chemistry Extracting solutions Sediment decontamination Sedimentation rate Zeta potential
The authors want to acknowledge the support of the Community of Madrid through the program “Garantía Juvenil” for the doctoral grant of the first author of this research.
- Arribas Jimeno S, Burriel Marti F, Hernendez Mendez J, Lucena Conde F (1992) Química analítica cualitativa. ParaninfoGoogle Scholar
- Balamurugan B, Mehta BR, Avasthi DK, Singh F, Arora AK, Rajalakshmi M, Raghavan G, Tyagi AK, Shivaprasad SM (2002) Modifying the nanocrystalline characteristics—structure, size, and surface states of copper oxide thin films by high-energy heavy-ion irradiation. J Appl Phys 92:3304–3310CrossRefGoogle Scholar
- Barceló D, Petrovic M (eds) (2007) Sustainable management of sediment resources. Sediment quality and impact assessment of pollutants. Elsevier, AmsterdamGoogle Scholar
- Bortone G, Palumbo L (eds) (2007) Sustainable management of sediment resources. Sediment and dredged material treatment. Elsevier, AmsterdamGoogle Scholar
- Brils J (2008) Sediment monitoring and the European water framework directive. Ann Ist Super Sanita 44:218–223Google Scholar
- Heise S (ed) (2007) Sustainable management of sediment resources. Sediment risk management and communication. Elsevier, AmsterdamGoogle Scholar
- Hunter RJ (2013) Zeta potential in colloid science: principles and applications. 2nd edn. Academic pressGoogle Scholar
- Khan MF, Ansari AH, Hameedullah M, Ahmad E, Husain FM, Zia Q, Baig U, Zaheer MR, Alam MM, Khan AM, AlOthman ZA, Ahmad I, Ashraf GM, Aliev G (2016) Sol-gel synthesis of thorn-like ZnO nanoparticles endorsing mechanical stirring effect and their antimicrobial activities: potential role as nano-antibiotics. Sci Rep 6:27689CrossRefGoogle Scholar
- Kloprogge T (2016) Infrared and Raman spectroscopy of minerals and inorganic materials. In: Lindon J, Tranter GE, Koppenaal D (eds) Encyclopedia of Spectroscopy and Spectrometry, 3rd edn. Academic Press, London, pp 267–281Google Scholar
- Landner L (2006) Speciation of metals in water, sediment and soil systems: Proc Intern Workshop, Sunne. October 15–16(1986):11Google Scholar
- Madejová J, Gates WP, Petit S (2017) IR spectra of clay minerals. In: Gates WP, Kloprogge JT, Madejová J, Bergaya F (eds) Developments in clay science. Elsevier, Amsterdam, pp 107–149Google Scholar
- Owens PN (2008) Sustainable management of sediment resources. Sediment management at the river basin scale. Elsevier, AmsterdamGoogle Scholar
- Shaw DJ (1966) Introduction to colloid and surface chemistry. 1st edn, Butterworth-HeinemannGoogle Scholar
- Sposito G (2008) The chemistry of soils, 2nd edn. Oxford University Press, OxfordGoogle Scholar