Influence of different forms of acidities on soil microbiological properties and enzyme activities at an acid mine drainage contaminated site
TL;DR: Though acid mine drainage affected soils had higher microbial biomass and activities due to higher organic matter content than those of the baseline soils, the ratios of microbial parameters/organic carbon indicated suppression of microbial growth and activitiesdue to acidity stress.
About: This article is published in Journal of Hazardous Materials.The article was published on 2010-07-15. It has received 30 citations till now. The article focuses on the topics: Acid mine drainage & Soil classification.
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01 Jan 2004
329 citations
TL;DR: The design of engineered sulfate-reducing bacteria (SRB) consortia will be an effective tool in optimizing degradation of acid mine tailings waste in industrial processes and the understanding of the complex functions of SRB consortsia vis-à-vis the metabolic and physiological properties in industrial applications is discussed.
Abstract: Mining industries produce vast waste streams that pose severe environmental pollution challenge. Conventional techniques of treatment are usually inefficient and unsustainable. Biological technique employing the use of microorganisms is a competitive alternative to treat mine wastes and recover toxic heavy metals. Microorganisms are used to detoxify, extract or sequester pollutants from mine waste. Sulfate-reducing microorganisms play a vital role in the control and treatment of mine waste, generating alkalinity and neutralizing the acidic waste. The design of engineered sulfate-reducing bacteria (SRB) consortia will be an effective tool in optimizing degradation of acid mine tailings waste in industrial processes. The understanding of the complex functions of SRB consortia vis-a-vis the metabolic and physiological properties in industrial applications and their roles in interspecies interactions are discussed.
104 citations
Cites background from "Influence of different forms of aci..."
...This also results in significant reduction in soil nutrient turnover because of the combined effect of H and Al3+ (Sahoo et al., 2010)....
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...This also results in significant reduction in soil nutrient turnover because of the combined effect of H+ and Al3+ (Sahoo et al., 2010)....
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TL;DR: The overall results suggest that indigenous earthworm, M.posthuma could be utilized as a successful candidate for bioprocessing of toxic wastes.
88 citations
Cites background from "Influence of different forms of aci..."
...Generally, MBC is largely affected by low pH (Sahoo et al., 2010)....
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TL;DR: The detection of one known sulfate-reducing bacteria suggested that biotic sulfate reduction may occur in acidic samples, which offers multiple advantages to AMD contamination treatment, and mechanistic insights into the effects of contamination on the soil microbiota are provided.
80 citations
29 Jan 2016
TL;DR: In this article, the average concentrations of trace elements in soils near coal mine areas from various cities/countries to provide a current global summary of this issue was assessed by using global reference materials and various contamination indices.
Abstract: The present paper reviewed the average concentrations of trace elements in soils near coal mine areas from various cities/countries to provide a current global summary of this issue. The contamination of soils was assessed by using global reference materials and various contamination indices. The results show that the average concentrations of trace elements varied widely: As (0.5–38.3 mg/kg), Mn (86–3,700 mg/kg), Zn (1.5–296 mg/kg), Cu (0.5–110 mg/kg), Cr (17.5–954 mg/kg), Ni (4.3–390 mg/kg), Pb (0.5–433 mg/kg), Cd (0.02–4.48 mg/kg), and Hg (0.02–0.69 mg/kg). Most of these values are higher than the average world background soils and upper continental crust (UCC). The geo-accumulation (I
geo
) and contamination factor (CF) indices show that the contamination levels of Ni and Pb are higher than other elements. The potential ecological risk index (E
i
) suggests a high risk from Cd, especially in the Tabagi River watershed in Brazil and Ledo coal mines in India, and Hg, especially in Oltu (Turkey). The degree of contamination index (C
d
) reveals that the soils from Barapukuria (Bangladesh), Ledo (India), Ptolemais-Amynteon (Greece), and the Tibagi River (Brazil) have a higher degree of contamination than other sites. To control soil contamination, effective monitoring and legislative measures must be taken immediately. For the long term, various physical, chemical, and biological methods should be implemented. Although the selection of suitable methods is site-specific based on the extent and nature of contamination, in general, phytoremediation seems to be more beneficial and cost-effective than physical/chemical techniques.
55 citations
References
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14 Feb 1996
8,749 citations
TL;DR: The Mehlich 3 (M3) extractant as discussed by the authors is composed of 0.2N CH3COOH, 0.25N NH4N03•0.015NNH4F, 0,013NHN03−0.001M EDTA.
Abstract: The objectives of this study were to modify the Mehlich 2 (M2) extractant to include Cu among the extractable nutrients, retain or enhance the wide range of soils for which it is suitable and minimize it's corrosive properties. The substitution of nitrate for chloride anions and the addition of EDTA accomplished those objectives. The new extracting solution, already designated Mehlich 3 (M3) is composed of 0.2N CH3COOH‐0.25N NH4N03‐0.015NNH4F‐0.013NHN03‐0.001M EDTA. Extractions from 105 soils using M3, M2, Bray 1 (Bl) and Ammonium Acetate (AA) were compared to evaluate the new extractant. The quantity of F extracted by M3 exceeded that by M2 20% and that by Bl 4% but the results from all extractions were highly correlated. Extractions of both K and Mg by M3 were 6–8% higher than those by AA and 3–4% higher than those by M2, but, again, there was high correlation among methods. Addition of EDTA increased Cu extractions by 170%, Mn by 50% and Zn by 25%. Cu extractions by M3 correlated with those fr...
4,798 citations
01 Jan 1982
2,974 citations
Book•
01 Jan 1970
2,237 citations
"Influence of different forms of aci..." refers background in this paper
...Besidesnormalizing and reducingoutliers, these transformations also tend to homogenize the variance of the distribution [27]....
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