The fate of trace metals in pore water collected from wetland sediments and organisms exposed to petroleum coke were evaluated within in situ aquatic microcosms. Oil sands operators of Fort McMurray, Alberta, Canada produced 60 million tonnes of petroleum coke by 2008, containing elevated concentrations of sulphur and several trace metals commonly seen in oil sands materials. This material may be included in the construction of reclaimed wetlands. Microcosms were filled with a surface layer of petroleum coke over mine-waste sediments and embedded in a constructed wetland for three years to determine how these materials would affect the metal concentrations in the sediment pore water, colonizing wetland plants and benthic invertebrates. Petroleum coke treatments produced significantly elevated levels of Ni. We also found unexpectedly higher concentrations of metals in "consolidated tailings" waste materials, potentially due to the use of oil sands-produced gypsum, and higher background concentration of elements in the sediment used in the controls. A trend of higher concentrations of V, Ni, La, and Y was present in the tissues of the colonizing macrophytic alga Chara spp. Aeshnid dragonflies may also be accumulating V. These results indicate that the trace metals present in some oil sands waste materials could be taken up by aquatic macro-algae and some wetland invertebrates if these materials are included in reclaimed wetlands.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2011.10.011 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Preparation of heteroatom-doped hyper-crosslinked polymers via waste utilization of sulfur-containing petroleum coke: A promising adsorbent for CO capture.
Environ Pollut
January 2025
School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, 510006, Guangzhou, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), 510006, Guangzhou, China; Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, 510006, Guangzhou, China.
To overcome the worldwide environmental crisis related to the continuous emission of CO, the use of porous organic polymers, which are excellent absorbents and conversion materials, to reduce CO emission is of great significance. Among them, hyper-crosslinked polymers (HCPs) are porous materials with a high pore density that are synthesized using a simple one-pot method that is economical and can realized at a low temperature, hence they have good application prospects as adsorbents for CO. In this study, a batch of petroleum coke-based HCPs with different sulfur contents was prepared via the one-pot Friedel-Crafts alkylation reaction using inexpensive and abundant petroleum coke as raw material.
View Article and Find Full Text PDFTreating Waste with Waste: Activated Bauxite Residue (ABR) as a Potential Wastewater Treatment.
ACS Omega
November 2024
Department of Civil and Environmental Engineering, University of Alberta, 9211-116 St. NW, Edmonton, Alberta T6G 1H9, Canada.
Article Synopsis
- Bauxite residue, a waste from alumina extraction, is being explored for reuse, specifically in treating oil sands process-affected water (OSPW) and supplementing municipal wastewater treatment.
- Activated bauxite residue (ABR) is created through a reduction roasting process, improving its ability to act as an adsorbent for removing harmful substances in wastewater.
- ABR significantly reduced contaminants in both OSPW (like acid-extractable organics and estrogenicity) and municipal wastewater (including fecal coliform and total phosphorus), but higher dosages can increase cytotoxicity, indicating the need for further optimization before widespread use.
Research on Activation Mechanisms In Situ during Rapid Desorption of Mercury-Absorbing Activated Coke by the Heating Method.
ACS Omega
November 2024
National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University, Jinan, Shandong 250061, China.
The adsorption of active coke is a good method to control mercury in coal-fired power plants, but spent powdered activated coke (SPAC) will cause secondary pollution and waste of resources if it is not properly treated. The purpose of this study was to explore the desorption performance of SPAC when heated in a drop-tube reactor under different atmospheres. The carbon consumption was 0.
View Article and Find Full Text PDFEffect of coal quality and preparation on the stamping performance and quality of coke.
Sci Rep
November 2024
Department of Oil, Gas and Solid Fuel Refining Technologies, National Technical University Kharkiv Polytechnic Institute, Kharkiv, Ukraine.
This article presents the results of the research on real coal charges of different compositions intended for coking with loading into the chamber by the stamping method. The results of the study established that with an increase in the content of coal at a low stage of metamorphism and a decrease in the content of coal at a high stage of metamorphism in the charges, a decrease in the quality indicators of the coke obtained from them leads to a decrease in the yield of coke. At the same time, there is a gradual decrease in the compaction of the charges from 22.
View Article and Find Full Text PDFComposition and polymerisation products influence on the viscosity of coal tar wash oil.
Sci Rep
November 2024
State Enterprise Ukrainian State Scientific Research Institute of Coal Chemistry (SE UKHIN), Vesnina 7, Kharkiv, 61023, Ukraine.
Wash oil is a fraction obtained by the distillation of coal tar and is primarily used for the absorption of light oil from coke oven gas. During operation, the oil undergoes polymerization and loses some components, necessitating the removal of the used oil and its replacement with fresh wash oil. The rheological properties of the studied oils were determined using a Brookfield DV2T rotational controlled-shear rate rheometer.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!