Environmental impact of ongoing sources of metal contamination on remediated sediments
| Autor: | Todd Redder, John R. Wolfe, Charles E. Milliken, John C. Seaman, Anna Sophia Knox, Michael H. Paller |
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| Rok vydání: | 2016 |
| Předmět: |
Lumbriculus variegatus
Geologic Sediments Environmental Engineering 010504 meteorology & atmospheric sciences Environmental remediation Amendment chemistry.chemical_element Biological Availability 010501 environmental sciences 01 natural sciences Arsenic Selenium Metals Heavy Lumbriculus Animals Environmental Chemistry Oligochaeta Waste Management and Disposal Environmental Restoration and Remediation 0105 earth and related environmental sciences Cadmium biology Environmental engineering Sediment Contamination biology.organism_classification Pollution chemistry Environmental chemistry Environmental science Metalloid Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Science of The Total Environment. :108-117 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2016.04.050 |
| Popis: | A challenge to all remedial approaches for contaminated sediments is the continued influx of contaminants from uncontrolled sources following remediation. We investigated the effects of ongoing contamination in mesocosms employing sediments remediated by different types of active and passive caps and in-situ treatment. Our hypothesis was that the sequestering agents used in active caps and in situ treatment will bind elements (arsenic, chromium, cadmium, cobalt, copper, nickel, lead, selenium, and zinc) from ongoing sources thereby reducing their bioavailability and protecting underlying remediated sediments from recontamination. Most element concentrations in surface water remained significantly lower in mesocosms with apatite and mixed amendment caps than in mesocosms with passive caps (sand), uncapped sediment, and spike solution throughout the 2520h experiment. Element concentrations were significantly higher in Lumbriculus variegatus from untreated sediment than in Lumbriculus from most active caps. Pearson correlations between element concentrations in Lumbriculus and metal concentrations in the top 2.5cm of sediment or cap measured by diffusive gradient in thin films (DGT) sediment probes were generally strong (as high as 0.98) and significant (p |
| Databáze: | OpenAIRE |
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