Ferric-enhanced chemical remediation of dredged marine sediment contaminated by metals and petroleum hydrocarbons.

08:00 EDT 17th August 2018 | BioPortfolio

Summary of "Ferric-enhanced chemical remediation of dredged marine sediment contaminated by metals and petroleum hydrocarbons."

Sediments nearby harbors are dredged regularly, and the sediments require the stringent treatment to meet the regulations on reuse and mitigate the environmental burdens from toxic pollutants. In this study, FeCl was chosen as an extraction agent to treat marine sediment co-contaminated with Cu, Zn, and total petroleum hydrocarbons (TPH). In chemical extraction process, the extraction efficiency of Cu and Zn by FeCl was compared with the conventional one using inorganic acids (HSO and HCl). Despite the satisfactory level for extraction of Cu (78.8%) and Zn (73.3%) by HCl (0.5 M) through proton-enhanced dissolution, one critical demerit, particularly acidified sediment, led to the unwanted loss of Al, Fe, and Mg by dissolution. Moreover, the vast amount of HCl required the huge amounts of neutralizing agents for the post-treatment of the sediment sample via the washing process. Despite a low concentration, extraction of Cu (70.1%) and Zn (69.4%) was done by using FeCl (0.05 M) through proton-enhanced dissolution, ferric-organic matter complexation, and oxidative dissolution of sulfide minerals. Ferric iron (Fe) was reduced to ferrous iron (Fe) with sulfide (S) oxidation during FeCl extraction. In consecutive chemical oxidations using hydrogen peroxide (HO) and persulfate (SO), the resultant ferrous iron was used to activate the oxidants to effectively degrade TPH. SO using FeCl solution (molar ratio of ferrous to SO is 19.8-198.3) removed 42.6% of TPH, which was higher than that by HO (molar ratio of ferrous to HO is 1.2-6.1). All experimental findings suggest that ferric is effectively accommodated to an acid washing step for co-contaminated marine sediments, which leads to enhanced extraction, cost-effectiveness, and less environmental burden.


Journal Details

This article was published in the following journal.

Name: Environmental pollution (Barking, Essex : 1987)
ISSN: 1873-6424
Pages: 87-93


DeepDyve research library

PubMed Articles [12664 Associated PubMed Articles listed on BioPortfolio]

Novel synergy of Si-rich minerals and reactive MgO for stabilisation/solidification of contaminated sediment.

Disposal of significant amounts of dredged contaminated sediment poses an economic and environmental problem worldwide. Transforming contaminated sediment into value-added construction materials using...

Framework for determining optimal strategy for sustainable remediation of contaminated sediment: A case study in Northern Taiwan.

Contaminated sediment may pose a serious threat to human health and ecosystems. However, sediment remediation is typically an expensive and time-consuming process. Therefore, an effective decision-mak...

Microwave (MW) remediation of hydrocarbon contaminated soil using spent graphite - An approach for waste as a resource.

In this study, we have explored the possibility of using an industrial waste for remediation of heavy fuel oil contaminated soil. Microwave (MW) heating in the presence of spent graphite (SG) from an ...

Remediation of Toxic Metal Contaminated Sediment Using Three Types of nZVI Supported Materials.

Due to nZVI effectiveness in the removal of toxic metals as well as low-cost regarding its production, kaolinite, bentonite and carboxymethyl cellulose supported nZVI were chosen for in-situ remediati...

State of the art and future challenges for polycyclic aromatic hydrocarbons is sediments: sources, fate, bioavailability and remediation techniques.

Polycyclic aromatic hydrocarbons (PAHs) are amongst the most abundant contaminants found in the aquatic environment. Due to their toxicity and carcinogenicity, their sources, fate, behaviour, and clea...

Clinical Trials [2163 Associated Clinical Trials listed on BioPortfolio]

Marine Protein Hydrolysate as Dietary Supplement in Elderly Part I

The aim of this study is to investigate the potential effect of a marine protein hydrolysate (MPH) supplement before a meal on postprandial glucose tolerance in healthy subjects, to achiev...

Pulpotomy With Various MTA Materials and Ferric Sulphate

The aim of this study was to determine clinical and radiographic efficacy of the newly developed OrthoMTA and RetroMTA , compared frequently used ferric sulfate for pulpotomy in primary se...

Comparing the Efficacy of Different Iron Formulations: Sucrosomal Ferric Pyrophosphate, SunActive®Fe and Intravenous Ferric Gluconate

The purpose of the study is to evaluate the effects of martial therapy, comparing different formulations, sucrosomal ferric pyrophosphate, SunActive®Fe micronized and ferric gluconate and...

Safety and Efficacy Study of Oral Ferric Maltol Compared to Intravenous Iron To Treat Iron Deficiency Anaemia in IBD

The purpose of this study is to compare the efficacy of ferric maltol and intravenous iron (IVI) Ferric Carboxy Maltose in the treatment of iron deficiency anaemia (IDA) and subsequent mai...

The Long-term Effect of Marine Omega-3 Fatty Acid Supplementation in Renal Transplantation

This is a long-term intervention study on the effects of marine n-3 PUFAs in renal transplantation. Our hypothesis is that patients treated with marine n-3 PUFA supplementation will have l...

Medical and Biotech [MESH] Definitions

Restoration of an environment, ecosystem, or habitat that was physically damaged during land development or by natural disaster, or contaminated by ENVIRONMENTAL POLLUTANTS. This is accomplished by various chemical, biological, and bulk movement methods, in conjunction with ENVIRONMENTAL MONITORING.

Examination of urine by chemical, physical, or microscopic means. Routine urinalysis usually includes performing chemical screening tests, determining specific gravity, observing any unusual color or odor, screening for bacteriuria, and examining the sediment microscopically.

The reaction of potassium ferrocyanide with ferric iron to yield a dark blue precipitate at the sites of the ferric iron. Used to determine ferric iron in tissues, particularly in the diagnosis of disorders of iron metabolism.

Removal of ENVIRONMENTAL POLLUTANTS or contaminants for the general protection of the environment. This is accomplished by various chemical, biological, and bulk movement methods, in conjunction with ENVIRONMENTAL MONITORING.

A species of gram-negative, halophilic bacteria, in the genus VIBRIO. It is considered part of normal marine flora and commonly associated with ear infections and superficial wounds exposed to contaminated water sources.

Quick Search


DeepDyve research library

Searches Linking to this Article