Microbial respiration as an indication of metal toxicity in contaminated organic materials and soil

Nwachukwu, O. I.; Pulford, I. D.

doi:10.1016/j.jhazmat.2010.10.024

Cited by 51 publications

(19 citation statements)

References 30 publications

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“…Respiration rates were influenced by weather conditions, microbial size and availability of heavy metals, also reported in literature (e.g. Conant et al, 2000;Kao et al, 2006;Nwachutkwu and Pulford, 2011). Mineralization of organic carbon was lower in Gorguel than in Lirio, despite applying the same quantity of slurry.…”

Section: Discussionsupporting

confidence: 64%

Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste

et al. 2013

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Section: Discussionsupporting

confidence: 64%

Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste

et al. 2013

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“…1 Other studies with similar tests confirm our results. In soil respiration tests, for instance, higher soil OC content (and also higher CEC), was related with a lower inhibition of CO 2 emission from soils contaminated with Pb [68,69]. Furthermore, high concentrations of lead were shown to cause an immediate decrease of basal soil respiration [70].…”

Section: Tablementioning

confidence: 92%

Effect of soil properties on the toxicity of Pb: Assessment of the appropriateness of guideline values

Romero‐Freire

Peinado

Gestel

2015

Journal of Hazardous Materials

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“…This is probably related to the lower applied dose and to the highly degraded OM provided by LE (see further discussion below), which might be less effective in terms of plant fertility. Among others, Nwachukwu & Pulford () observed that the organic amendments improved microbial respiration in contaminated soils, with a positive correlation between the amendment rate and respiration rate. In general, the highest respiration rates were observed in the BC treatments.…”

Section: Resultsmentioning

confidence: 99%

Carbon Sequestration in Restored Soils by Applying Organic Amendments

et al. 2015

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The study of different natural carbon sinks has become especially important because of climate change effects. The restoration of contaminated areas can be an ideal strategy for carbon sequestration. The studied area was affected by toxic Aznalcóllar mine spill in 1998. Restoration process of the contaminated area was based, mainly, on the use of two organic amendments: leonardite (LE) and biosolid compost (BC). The objective of this study was to verify whether the application of these amendments promotes the long-term carbon sequestration in this soil. Five treatments were established: untreated control, biosolid compost (doses 4 and 2) and leonardite (doses 4 and 2). The addition of amendments implied an improvement in soil quality that was directly related to the amendment dose: decrease in bulk density, increase in pH, higher respiration rates and an improvement in the stratification ratio. Dose-dependent changes in the molecular composition of soil organic matter were shown by nuclear magnetic resonance analysis. Both amendments promoted carbon retention, although because of the low mineralization rates of soil organic matter in LE treatments, the carbon storage was higher. The dosage effect on the carbon balance was more important in LE treatments, whereas in the BC treatments, the balance was similar for both doses. Our findings suggest that LE4 significantly increased the total organic carbon and it was the most suitable treatment for long-term carbon storage, because of its molecular composition rich in relatively stable aromatic and lignin-derived compounds.

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Microbial respiration as an indication of metal toxicity in contaminated organic materials and soil

Cited by 51 publications

References 30 publications

Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste

Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste

Effect of soil properties on the toxicity of Pb: Assessment of the appropriateness of guideline values

Carbon Sequestration in Restored Soils by Applying Organic Amendments

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