Stability of carbon pools and fluxes of a Technosol along a 7-year reclamation chronosequence at an asbestos mine in Canada

Khlifa, Rim; Rivest, David; Grimond, Laurence; Bélanger, Nicolas

doi:10.1016/j.ecoleng.2022.106839

Cited by 10 publications

(6 citation statements)

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“…Soil carbon stocks are expected to substantially increase after PB application due to their high organic carbon content and carbon: nitrogen ratio (Henry et al, 1994;Gagnon and Ziadi, 2012). At an application rate of about 125 Mg ha −1 , the newly added carbon (approximately 50-60 Mg C ha −1 ) is anticipated to become a stable long-term storage in forest soils, similar to observations in ecological restoration projects, some being afforestation efforts, using MBs for soil reconstruction (Trlica and Teshima, 2011;Carbassa et al, 2020;Khlifa et al, 2023). These afforestation projects can also lead to significant tree growth and carbon sequestration as well (e.g., Grimond et al, 2023;Bélanger et al, 2024).…”

Section: Paper Biosolids As Fertilizersmentioning

confidence: 88%

“…Notably, the industry has been using its biosolids as a soil amendment for silvicultural, agricultural and ecological restoration purposes, as well as for biorefinery products such as wood adhesives and fillers, thermoplastic composites, and sorbent materials (Pervaiz and Sain, 2015;Bilodeau-Gauthier et al, 2022;Chen et al, 2023;Grimond et al, 2023). Recycling of PBs in silviculture could increase carbon sequestration by maximizing tree growth (Bilodeau-Gauthier et al, 2022) and promoting a stable form of carbon in soils (Khlifa et al, 2023), as well as reducing GHG emissions compared to synthetic fertilizers (Chen et al, 2023). Additionally, it could avoid a significant CO 2 -equivalent flux to the atmosphere associated with the landfilling or incineration of PBs.…”

Section: Introductionmentioning

confidence: 99%

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Opportunities and challenges to improve carbon and greenhouse gas budgets of the forest industry through better management of pulp and paper by-products

Laberge,

Courcot,

Lagarde

et al. 2024

Front. Environ. Sci.

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Developing land use strategies to optimize carbon sinks and improve carbon footprints involves proposing efficient nature-based solutions that industries and businesses can implement while considering financial and legislative constraints. The pulp and paper industry is associated with significant greenhouse gas (GHG) emissions, primarily due to the substantial carbon dioxide (CO2) footprint of its mills. Also, some forestry operations contribute to the release of carbon to the atmosphere in the form of CO2 and methane (CH4). Conversely, this industry could potentially be a significant ally in the fight against climate change by favoring forestry practices that reduce carbon emissions and increase its sequestration, namely, by adding value to industrial by-products (e.g., biosolids) instead of treating them as wastes and landfilling them. Notably, the pulp and paper industry has been seeking alternative uses of its by-products, such as fertilizers to maximize tree growth. In this paper, we identify opportunities and challenges that exist for the pulp and paper industry in regard to recycling industrial by-products to: 1) lower GHG emissions directly at the mill and 2) improve its GHG budget by increasing carbon sequestration in forests and plantations. We illustrate our analyses by describing a case study of a pulp and paper mill in southern Quebec, Canada, that uses its biosolids and other by-products as fertilizers. This case study highlights that this strategy could not only contribute to the reduction of GHGs but could also create added value and improve economic returns of forest operations.

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Section: Paper Biosolids As Fertilizersmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Opportunities and challenges to improve carbon and greenhouse gas budgets of the forest industry through better management of pulp and paper by-products

Laberge,

Courcot,

Lagarde

et al. 2024

Front. Environ. Sci.

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“…For example, there are still over 2800 operational mines in India 10 . Additionally, countries like Greece 11 , Canada 12 , Russia 13 , and Italy 14 also have asbestos mines in operation or in a state of closure. In China, asbestos mining production in 2020 has reached a total of 100,000 t 15 .…”

Section: Introductionmentioning

confidence: 99%

Risk assessment and source analysis of heavy metals in soil around an asbestos mine in an arid plateau region, China

Li,

Ding,

Xie

et al. 2024

Sci Rep

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Asbestos is widely used in construction, manufacturing, and other common industrial fields. Human activities such as mining, processing, and transportation can release heavy metals from asbestos into the surrounding soil environment, posing a health hazard to the mining area's environment and its surrounding residents. The purpose of the present study was to determine the extent of ecological and human health damage caused by asbestos pollution, as well as the primary contributors to the contamination, by examining a large asbestos mine and the surrounding soil in China. The level of heavy metal pollution in soil and sources were analyzed using methods such as the geo-accumulation index (Igeo), potential ecological risk index (RI), and positive matrix factorization (PMF) model. A Monte Carlo simulation-based health risk model was employed to assess the health risks of heavy metals in the study area’s soil to human beings. The results showed that the concentrations of As, Pb, Cr, Cu, and Ni in the soil were 1.74, 0.13, 13.31, 0.33, and 33.37 times higher than the local soil background values, respectively. The Igeo assessment indicated significant accumulation effects for Ni, Cr, and As. The RI evaluation revealed extremely high comprehensive ecological risks (RI ≥ 444) in the vicinity of the waste residue heap and beneficiation area, with Ni exhibiting strong individual potential ecological risk (Eir ≥ 320). The soil health risk assessment demonstrated that As and Cr posed carcinogenic risks to adults, with mean carcinogenic indices (CR) of 1.56E − 05 and 4.14E − 06, respectively. As, Cr, and Cd posed carcinogenic risks to children, with mean CRs of 1.08E − 04, 1.61E − 05, and 2.68E − 06, respectively. Cr also posed certain non-carcinogenic risks to both adults and children. The PMF model identified asbestos contamination as the primary source of heavy metals in the soil surrounding the asbestos mining area, contributing to 79.0%. According to this study, it is recommended that management exercise oversight and regulation over the concentrations of Ni, Cr, Cd, and As in the soil adjacent to asbestos mines, establish a designated control zone to restrict population activities, and locate residential zones at a safe distance from the asbestos mine production zone.

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“…Reclamation, with soil quality changing throughout the process, also has a significant impact on the soil environment [7]. Several studies examined the variations in soil properties during different reclamation periods and generally observed that soil organic matter and nitrogen content decreased significantly after the reclamation of saline soils [8]. For black soils in Northeast China, it was observed that the initial 20 years of reclamation had much higher rates of decreasing soil nitrogen and organic matter content, after which the soil nitrogen and organic matter content decreased stably [9].…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Liu,

Li,

Zhang

et al. 2023

Agronomy

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The saline soils in the Yellow River Delta are primarily affected by seawater intrusion resulting from the intersection of land and sea, which exhibit variations in salinity. The quality of these soils is also influenced by anthropogenic reclamation, including fertilization and irrigation. This study quantitatively evaluated the distinct soil properties and soil quality characteristics of the Yellow River Delta during different reclamation years (i.e., 0a, 1a, 5a, 10a, and 20a) using principal component analysis (PCA) and the Soil Quality Index (SQI). The findings indicated that the soil salt content (SSC) significantly decreased (p < 0.05) from 6.60 g/kg in the initial reclamation year (0a) to 1.63 g/kg in the 10th year (10a) and then slightly increased to 2.85 g/kg in the 20th year (20a). Consequently, the soil salinity level shifted from saline soil to slight salinity and then increased to medium salinity. Ammonium nitrogen (NH4+-N) notably increased by 8.31 mg/kg during the first five years of reclamation (0a to 5a) and gradually decreased by 2.56 mg/kg in the 20th year (20a). On the other hand, nitrate nitrogen (NO3−-N) experienced a significant decrease of 2–5 times after reclamation but continued to increase by 8.96 mg/kg with subsequent reclamation years. The available nitrogen (AN), available phosphorus (AP), and soil organic carbon (SOC) exhibited a significant increase of 24.87 mg/kg, 10.11 mg/kg, and 6.76 g/kg, respectively, with increasing reclamation years. However, available potassium (AK) gradually decreased after reclamation and then increased in the 20th year (20a). The values of SQI for different reclamation years were 0.307 for 0a, 0.339 for 1a, 0.320 for 5a, 0.318 for 10a, and 0.327 for 20a, indicating an increasing trend with increasing reclamation years. It was discovered that long-term reclamation significantly reduced soil salinity and improved soil quality, leading to the sustainable development of reclaimed saline soils in the Yellow River Delta.

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Stability of carbon pools and fluxes of a Technosol along a 7-year reclamation chronosequence at an asbestos mine in Canada

Cited by 10 publications

References 62 publications

Opportunities and challenges to improve carbon and greenhouse gas budgets of the forest industry through better management of pulp and paper by-products

Opportunities and challenges to improve carbon and greenhouse gas budgets of the forest industry through better management of pulp and paper by-products

Risk assessment and source analysis of heavy metals in soil around an asbestos mine in an arid plateau region, China

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

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