Acid-base account effectiveness for determination of mine waste potential acidity

Jennings, Stuart; Dollhopf, D.J.

doi:10.1016/0304-3894(95)00003-d

Cited by 29 publications

(9 citation statements)

References 5 publications

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“…Correction for sulfates and organic sulfur naturally present in some overburdens or resulting from partial weathering of pyritic materials may be necessary to increase accuracy in predicting the acid-producing potential of materials containing mixed sulfur species. When common sulfide (e.g., pyrite) and sulfate (e.g., gypsum) minerals are subjected to acid-base account (ABA) analytical extraction methods, the ABA method may fail to distinguish accurately the acid forming from non-acid forming minerals and may result in errors in the determination of potential acidity (Jennings and Dollhopf, 1995).…”

Section: Acid Sulfate Soils and Acid Generationmentioning

confidence: 99%

Developing Diverse, Effective, and Permanent Plant Communities on Reclaimed Surface Coal Mines: Restoring Ecosystem Function

Vasquez¹,

Sheley²

2018

JASMR

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Surface coal mine disturbances affect vegetation, soil chemical/physical properties, bedrock, and landforms. The scope of this article focuses on lands to be reclaimed back to rangelands (post-mine land use) similar to the pre-mine ecosystem in terms of plant composition/diversity, structure, and ecosystem function. Reclamation programs that solely emphasize plant community composition and structure rather than effectively repairing disturbed or altered ecological processes ignores the foundation upon which the sustainability of reconstructed plant communities depends. Reclamation success may be improved by addressing primary ecological processes driving ecosystem function as part of the reclamation process. Altered primary processes require repair of the physical system in conjunction with adding seeds or plants. Land-form design strategies, which are designed to capture, store, and release water effectively into reconstructed watersheds is the foundation of successfully reclaimed ecosystems. Because plant functional groups can differ in their spatial and temporal acquisition of resources, improving functional diversity may be a method to more fully utilize soil nutrients in reclaimed soils and improve resilience to weed invasion. Strategically combining species with different seed/seedling traits in seed mixtures can increase chances of achieving adequate plant establishment during revegetation. Monitoring program design should be an integral part of the reclamation planning process, and indicators reflecting landscape-scale processes can be adapted to monitor reclamation project success. Effective reclamation plans are process-oriented, seek to initiate self-repair, and address landscape interactions. The probability of achieving successful reclamation is enhanced by pursuing a broader goal of improving ecosystem vigor, organization and resilience utilizing novel assemblages of species that perform desired functions and produce a range of ecosystem goods and services. Reclaiming mined land requires realistic objectives that consider the ecological potential of the site, land-use goals, and socioeconomic constraints. Additional

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Section: Acid Sulfate Soils and Acid Generationmentioning

confidence: 99%

Developing Diverse, Effective, and Permanent Plant Communities on Reclaimed Surface Coal Mines: Restoring Ecosystem Function

Vasquez¹,

Sheley²

2018

JASMR

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“…Note: Sobek method commonly used for samples from coal mines where organic S present; therefore, residual fraction is assumed to be non acid-forming. On the other hand, the Schafer method was designed to evaluate hardrock mine materials for potential acid production; therefore, the residual fraction is considered to be acid-forming (Jennings and Dollhopf, 1995). The other three components of ABA, pH, rock type, and depth below land surface, can provide important information that may influence the manner in which a minesoil or overburden sample is analy:red.…”

Section: Stoichiometrymentioning

confidence: 99%

Acid/Base Account and Minesoils: A Review

Hossner¹,

Brandt²

1997

ASMR

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Generation of acidity from the oxidation of iron sulfides (FeS 2) is a common feature of geological materials exposed to the atmosphere by mining activities. Acid/base accounting (ABA) has been the primary method to evaluate the acid-or alkaline-potential of geological materials and to predict if weathering of these materials will have an adverse effect on terrestrial and aquatic environments. The ABA procedure has also been used to evaluate minesoils at different stages of weathering and, in some cases, to estimate lime requirements. Conflicting assessments of the methodology have been reported in the literature. The ABA is the fastest and easiest way to evaluate the acid-forming characteristics of overburden materials; however, accurate evaluations sometimes require that ABA data be examined in conjunction with additional sample information and results from other analytical procedures. The end use of ABA data, whether it be for minesoil evaluation or water quality prediction, will dictate the method's interpretive criteria. Reaction kinetics and stoichiometry may vary and are not clearly defined for all situations. There is an increasing awareness of the potential for interfering compounds, particularly siderite (FeC0 3), to be present in geological materials associated with coal mines. Hardrock mines, with possible mixed sulfide mineralogy, offer a challenge to the ABA, since acid generation may be caused by minerals other than pyrite. A combination of methods, static and kinetic, is appropriate to properly evaluate the presence of acid-forming materials.

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“…The classical method of determining acid formation potential of acid forming minerals is based on the use of extraction techniques to measure the quantity of acid forming sulfur compounds. Jennings' and Dollhopf (1995) discussed the limitations of this technique and noted that the conventional method fails to distinguish between acid forming and nonacid forming minerals. Lime treatment to achieve neutralization and sewage sludge to achieve reduction was used to treat AMD (McLaughlin, et aL, (1995).…”

Section: Characteriza Tion Prevention Treatment and Reclamationmentioning

confidence: 99%