Effect of soil reclamation process on soil C fractions

Asensio, Verónica; Vega, F.A.; Covelo, Emma F.

doi:10.1016/j.chemosphere.2013.09.108

Cited by 24 publications

(8 citation statements)

References 31 publications

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“…The soil DOC is the carbon component that is best for microbial growth [51]. The DOC content is generally no greater than 2% of the total SOC; however, compared with the relatively stable components of humus, the soil DOC has a higher degradation rate [52,53], and its dynamic changes can reflect the stability of the SOC.…”

Section: Discussionmentioning

confidence: 99%

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Yu-le

et al. 2017

Sustainability

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Soil organic carbon (SOC) plays an essential role in the early stages of pedogenisis and ecological restoration in reclaimed mine soils. Dynamic changes in the SOC content are essential for assessing the quality of reclaimed mine soils and the effect of ecological restoration. To objectively assess the carbon dynamics of reclaimed soils, we selected the surface (0-20 cm) soil of farmland under agricultural use (soybean-wheat rotation) from a reclamation chronosequence (R4: 4 years of reclamation, R7: 7 years of reclamation, R10: 10 years of reclamation and R13: 13 years of reclamation) in the Dongtan Mining Area, Shandong Province, China. The adjacent normal, unaffected farmland was used as a control (CK). The results showed that the SOC content gradually increased with the reclamation age until it reached 7.98 g·kg −1 for R13, which accounted for 76% of that of the CK. However, the total carbon contents of the reclaimed soils did not significantly differ from and even appeared higher than that of the CK. This is mainly because the inorganic carbon contents of the reclaimed soils ranged from 2.98 to 12.61 g·kg −1 , all of which were significantly higher than the 0.87 g·kg −1 obtained for the CK. The microbial biomass carbon (MBC) content and the microbial quotient significantly increased with the reclamation age of the soil, and both parameters were markedly higher for R13 than for the CK. The dissolved organic carbon (DOC) content and its ratio to the SOC were significantly higher for R4-R13 than for the CK and DOC/SOC gradually decreased with the reclamation age. Both the reclamation age and the temperature had positive effects on the soil basal respiration (SBR). The SBR rate constantly increased with the reclamation age and was markedly higher at 25 • C than at 15 • C. The temperature sensitivity (Q 10 ) of the SBR showed a clearly decreasing trend for the reclamation chronosequence, but its value remained higher for R13 than for the CK (2.37). The metabolic quotient constantly decreased with the reclamation age, which suggests that the survival pressure imposed on soil microbes by the soil environment gradually decreased. These results indicate that it takes a long time for organic carbon to accumulate in reclaimed mine soil and that rational agricultural use contributes to sustained improvement of the quality of reclaimed soil.

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Section: Discussionmentioning

confidence: 99%

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Yu-le

et al. 2017

Sustainability

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“…Humified organic C was increased in depleted copper mine soil using organic amendments, on the contrary to tree vegetation. 35 Although soils on coal-mine spoils are quite different from those on Cu post-flotation tailings, results obtained indicate an increase in HS humification degree on reclaimed areas. 11 According to Abakumov et al 2 caloricity of HA tends to increase with increasing site age in a reclaimed mine soil chronosequence (maximum 7-10 years), while on unreclaimed site no trend was evident, explained by ecosystem heterogeneity.…”

Section: Resultsmentioning

confidence: 79%

Properties of humic acids from copper tailings 20 years after reclamation

Radmanović

Marković

Jovanović

et al. 2020

JSCS

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Part of Cu post flotation tailings of Serbia ZiJin Bor Copper, Serbia, was reclaimed by restoration of top soil with arable soils, and revegetation in 1991. Humic acids isolated from these Technosols were investigated to find out if their properties underwent any changes since reclamation. Two groups of control samples were used. Elemental composition (CHNS analysis) falls within the range of average soil humic acids. Humic acids belong to the type B pointing out to its lower humification degree (UV-Vis). Relative abundances of functional groups are ranged as follows: polysaccharide C ≥ aromatic C > carboxyl C > OH group > aliphatic C. Aromaticity indexes are low, 1.88-3.25 (ATR-FTIR). Basic units at pH 10 are in the 11.7-26.8 nm range. Pronounced reaggregation (1462-5218 nm) at pH 3 points out to less expressed humic acid sol stability, as well as to increase in aromatic condensation degree (dynamic light scattering). No significant changes have occurred in technosol humic acids since the recultivation, confirming stability of their properties over time (PCA). Nevertheless, humic acids from very strongly acidic Technosols show higher humifycation degree possibly originating from arable soils used in reclamation, but more likely from low soil pH and low litter input, results of unsuccessful reclamation.

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“…The type of wastes used vary widely between amended sites, and can include sewage sludges, manure, paper mill residues, ashes, residues from agri-food industries and shells from marine animals (Almendro-Candel et al 2007;Asensio et al 2013a, b;Baker et al 2011;Calace et al 2005;Rodríguez-Jordá et al 2012). It has been shown that these wastes can supply high amounts of organic matter and nutrients to soils (Asensio et al 2014b) but, in some cases, they can also provide high quantity of metals (Bowszys et al 2015;Singh and Agrawal 2008). A previous study (Asensio et al 2013c) has shown that a mine soil amended with sewage sludges and paper mill residues has a higher concentration of Ni, Pb and Zn than the same soil without treatment.…”

Section: Introductionmentioning

confidence: 97%

Physical distribution of Ni, Pb and Zn in reclaimed mine soils observed by FE-SEM with an EDS detector

Asensio

Covelo

2015

Environ Sci Pollut Res

Self Cite

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The aim of this study was to physically demonstrate the associations between Ni, Pb and Zn and the different soil components. To achieve this, several soil samples were observed by field emission-scanning electron microscope (FE-SEM) equipped with an energy dispersive spectrometer (EDS) detector. The samples came from mine sites vegetated and/or amended with wastes (sewage sludges and paper mill residues). The concentrations of metals in the different soil fractions were quantified by a chemical sequential extraction in a previous study. The sorption capacity of the soils was evaluated with sorption experiments using the batch method. We corroborated the results obtained by the sequential extraction of metals as well as the sorption experiments with the observations from the FE-SEM with the EDS. We physically observed the associations between Ni, Pb and Zn and oxides, organic matter and clays. We also observed PbCaCO3 crystals in one of the soils, presumably formed during the sorption experiment. As it is not possible to know with complete certainty how Pb was retained by calcium in this soil by only using chemical methods, the use of microscopic techniques is crucial to ascertain how metals are associated with the different soil fractions.

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Effect of soil reclamation process on soil C fractions

Cited by 24 publications

References 31 publications

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Properties of humic acids from copper tailings 20 years after reclamation

Physical distribution of Ni, Pb and Zn in reclaimed mine soils observed by FE-SEM with an EDS detector

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