Growth and metal uptake of canola and sunflower along a thickness gradient of organic-rich covers over metal mine tailings

Campbell, Daniel; Stewart, K. Elaine; Spiers, Graeme; Beckett, Peter

doi:10.1016/j.ecoleng.2017.08.019

Cited by 7 publications

(1 citation statement)

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“…Modern policy-makers consider soil as a non-renewable natural resource of high importance that links atmospheric, subsurface and aquatic media to minimize release of wastes and emissions ( EC, 2006 ; EEA, 2017 ) and support development of monitoring ( Tóth et al., 2016 ) and remediation programs ( Martino et al., 2016 ). However, input of pollutants into soils is still increasing, commonly reaching toxic levels, with examples on the planet where industrial activity has catastrophically affected soil cover and destroyed ecosystems ( Kozlov and Zvereva, 2007 ; Koptsik et al., 2016 ; Campbell et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Organic amendments potentially stabilize metals in smelter contaminated Arctic soils: An incubation study

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et al. 2021

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The long-term emission impacts of the nickel processing industry in the Kola Peninsula, the largest source of sulfur dioxide and heavy metals emissions in Northern Europe, have created vast technogenic barrens near the mineral industry complexes. The pace of rehabilitation using the improved remediation technologies to enhance sustainable environmental management and regional economic development is of crucial social and economic importance. In a 120-day incubation experiment, we evaluated the prospects for the restoration of two soils at different degradation stages via carbon pool regulation comparing to mineral ameliorants – NPK fertilizer, and liming agent. Organic additives used included a humic preparation based on an alkaline brown coal extract, wood-derived biochar, and peat-derived gel, supplied by mycorrhizae fungi. The results demonstrate that the selected organic amendments are suitable for restoration of acidic metal contaminated soils. Specifically, the treatments provided a measurable increase in soil carbon content, a marked decrease in acidity, a decrease in extractable metal contents, together with an enhanced nutrient uptake and vegetative growth. A stabilization effect increased from biochar to peat-gel, liming agent and humic preparation, with an accompanying increase in soil pH. Although biochar showed a reduced ability to metal stabilization, the associated treatments were the most productive. The most effective amendments in multi-metallic contaminated soils need to be able to stabilize bioavailability of metals, adjust pH to the optimum for plant growth, and regulate nutrient consumption.

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