Authors: Annabel Arnott,
Identifier: CSBE21794
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Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions

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Description: Land degradation as a result of unregulated mineral exploration and mining, negatively impacts local communities and vulnerable ecosystems. Phytoremediation is used as a progressive rehabilitation strategy to stabilize tailings sites, reduce soil erosion and immobilize heavy metal contaminants. However, in order to develop successful and sustainable phytoremediation methods, native plants must overcome several abiotic stressors. This project investigates the potential of repurposing rock dust tailings material as a soil amendment and native boreal forest species combinations for mine reclamation purposes. All field experiments have been established at sites within Anaconda Mining Inc.?s Point Rousse Project Site, located within the Baie Verte Mining District (49'57?42? N, 56'07?23? W) in north-central Newfoundland, Canada. They are comprised of three separate randomized plot design experiments with varying ratios of rock dust (RD) to topsoil-organics (Top-Org) material and combinations of native boreal forest species. The objectives of this project are to determine the best RD:Top-Org ratio that will support revegetation and determine the best performing native species combinations to establish a self-sustaining vegetative community. It is hypothesized that soil amendment with rock dust tailings material will improve revegetation through soil remineralization, due to the availability of essential and beneficial nutrients at functional concentrations. Preliminary plant height and percent cover data reveals the potential of a 25% RD: 75% Top-Org ratio, as well as the addition of 0.5% biochar to treatments in both the Pine Cove Site and Stog?er Tight Site. However, this data collection remains ongoing and thus is currently inconclusive.

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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 4 - Soil conservation & Pollution Control

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Publication type: Presentation
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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