Solubilization of Manganese and Trace Metals in Soils Affected by Acid Mine Runoff

Green, C. H.; Heil, Dean; Cardon, Grant; Butters, G. L.; Kelly, Eugene F.

doi:10.2134/jeq2003.1323

Cited by 37 publications

(23 citation statements)

References 23 publications

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“…In turn, Mn and Fe oxides are reductively dissolved and released in solution with their respective metal/metalloid loading. Many authors have considered Mn and Fe oxides to be a major parameter controlling trace metal mobility in wetland soils (Charlatchka and Cambier 2000;Chuan et al 1996;Davranche et al 2003;Francis and Dodge 1990;Green et al 2003;Quantin et al 2001Quantin et al , 2002. Several studies report positive correlations between Mn(II) and Fe(II) concentrations in wetland soil solutions and dissolved organic matter (DOC).…”

Section: Introductionmentioning

confidence: 99%

Biogeochemical Factors Affecting Rare Earth Element Distribution in Shallow Wetland Groundwater

et al. 2014

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Wetlands are specific areas able to regulate metals mobility in the environment. Among metals, rare earth elements (REE) appear to be particularly interesting because of the information that could be provided by the REE patterns. Moreover, as REE are becoming a matter of great economic interest, their significant release into the environment may be expected over the next few decades. Wetlands would then play a key role in the regulation of their concentration in the environment. This review demonstrated that REE are released in wetland bound to colloidal organic matter. During the flood season, the released REE concentrations are largely higher than those released during the wet period. This solubilization is related to the organic matter desorption caused by the pH rise imposed by the reducing reactions. The resulting REE patterns depend on the heterogeneity of the humic acid (HA) binding sites and the presence of potential competitive cations, such as Fe(III) and Al(III). At high REE loading, REE are bound to HA carboxylic groups and the pattern exhibit a MREE downward concavity. At low loading, REE are bound to phenolic and chelate groups and the pattern exhibits a lanthanide contraction. At low loading, REE seem to act as cationic bridges between two organic molecules, whereas at high loading they seem to be engaged in strong multidentate bonding. Moreover, the REE patterns can be modified with the competitive cations amount and speciation. The prime factor governing all these processes is pH, which drives the organic colloid production, REE loading and solubility of competitive cations.

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Section: Introductionmentioning

confidence: 99%

Biogeochemical Factors Affecting Rare Earth Element Distribution in Shallow Wetland Groundwater

et al. 2014

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“…At foliar Mn concentrations of 610 ppm on the acidic clay site, neither DIS nor ERI showed any foliar symptoms of phytotoxicity on the SH coal mine spoils. Manganese is an essential plant nutrient, but toxic levels of Mn have been reported in arid areas under irrigation and from metal-rich mine surface runoff and drainage waters [35]. Shanahan et al [13] established toxicity thresholds of 2791 and 3117 mg L −1 for Mn, and 556 and 623 mg L −1 for Zn, in two willow species native to western North America.…”

Section: Discussionmentioning

confidence: 99%

“…Although reclamation and phytoremediation of heavy-metal-contaminated sites using willows have been investigated in Europe, these studies have been restricted to a limited number of species and a limited number of genotypes (or clones) within species [11,12,[19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Of special concern for bioenergy production in the context of land reclamation is the identification of well-adapted, native plant species that can tolerate highly acidic soil conditions that may contain potentially toxic levels of metals and high EC [8,13,14,21,[33][34][35][36]. Soil pH changes the solubility and mobility of metals, thereby increasing potential toxicity as soil acidity increases [37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation Efficacy of Salix discolor and S. eriocephela on Adjacent Acidic Clay and Shale Overburden on a Former Mine Site: Growth, Soil, and Foliage Traits

Mosseler¹,

Major²

2017

Forests

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Plants regularly experience suboptimal environments, but this can be particularly acute on highly-disturbed mine sites. Two North American willows-Salix discolor Muhl. (DIS) and S. eriocephala Michx. (ERI)-were established in common-garden field tests on two adjacent coal mine spoil sites: one with high clay content, the other with shale overburden. The high clay content site had 44% less productivity, a pH of 3.6, 42% clay content, high water holding capacity at saturation (64%), and high soil electrical conductivity (EC) of 3.9 mS cm −1 . The adjacent shale overburden site had a pH of 6.8, and after removing 56.5% stone content, a high sand content (67.2%), low water holding capacity at saturation (23%), and an EC of 0.9 mS cm −1 . The acidic clay soil had significantly greater Na (20×), Ca (2×), Mg (4.4×), S (10×), C (12×) and N (2×) than the shale overburden. Foliar concentrations from the acidic clay site had significantly greater Mg (1.5×), Mn (3.3×), Fe (5.6×), Al (4.6×), and S (2×) than the shale overburden, indicating that these elements are more soluble under acidic conditions. There was no overall species difference in growth; however, survival was greater for ERI than DIS on both sites, thus overall biomass yield was greater for ERI than DIS. Foliar concentrations of ERI were significantly greater than those of DIS for N (1.3×), Ca (1.5×), Mg (1.2×), Fe (2×), Al (1.5×), and S (1.5×). There were no significant negative relationships between metal concentrations and growth or biomass yield. Both willows showed large variation among genotypes within each species in foliar concentrations, and some clones of DIS and ERI had up to 16× the Fe and Al uptake on the acidic site versus the adjacent overburden. Genetic selection among species and genotypes may be useful for reclamation activities aimed at reducing specific metal concentrations on abandoned mine sites. Results show that, despite having a greater water holding capacity, the greater acidity of the clay site resulted in greater metal mobility-in particular Na-and thus a greater EC. It appears that the decline in productivity was not due to toxicity effects from the increased mobility of metals, but rather to low pH and moisture stress from very high soil Na/EC.

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“…Solubility of TEs increases during the course of submergence [34]. Mass flow of elements into roots especially that of Fe and Mn, accelerates at this stage.…”

Section: Regulatory Role Of Micronutrientsmentioning

confidence: 95%

Trace Element Management in Rice

Sebastian¹,

Prasad²

2015

Agronomy

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Trace elements (TEs) are vital for the operation of metabolic pathways that promote growth and structural integrity. Paddy soils are often prone to TE limitation due to intensive cultivation and irrigation practices. Apart from this, rice paddies are potentially contaminated with transition metals such as Cd, which are often referred to as toxic TEs. Deficiency of TEs in the soil not only delays plant growth but also causes exposure of plant roots to toxic TEs. Fine-tuning of nutrient cycling in the rice field is a practical solution to cope with TEs deficiency. Adjustment of soil physicochemical properties, biological process such as microbial activities, and fertilization helps to control TEs mobilization in soil. Modifications in root architecture, metal transporters activity, and physiological processes are also promising approaches to enhance TEs accumulation in grains. Through genetic manipulation, these modifications help to increase TE mining capacity of rice plants as well as transport and trafficking of TEs into the grains. The present review summarizes that regulation of TE mobilization in soil, and the genetic improvement of TE acquisition traits help to boost essential TE content in rice grain.

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Solubilization of Manganese and Trace Metals in Soils Affected by Acid Mine Runoff

Cited by 37 publications

References 23 publications

Biogeochemical Factors Affecting Rare Earth Element Distribution in Shallow Wetland Groundwater

Biogeochemical Factors Affecting Rare Earth Element Distribution in Shallow Wetland Groundwater

Phytoremediation Efficacy of Salix discolor and S. eriocephela on Adjacent Acidic Clay and Shale Overburden on a Former Mine Site: Growth, Soil, and Foliage Traits

Trace Element Management in Rice

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