Toxicity of Bauxite Manufacturing By-products in Sea Urchin Embryos

Pagano, Giovanni; Meriç, Süreyya; Biase, A. De; laccarino, Mario; Petruzzelli, Domenico; Tünay, Olcay; Warnau, Michel

doi:10.1006/eesa.2001.2114

Cited by 32 publications

(20 citation statements)

References 13 publications

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“…The sea urchin embryo toxicity test did not show any toxic effect (no significant differences between control and samples, see Table 5). Larval malformations were found in sea urchins in previous investigations conducted in bauxite manufacturing sludge [32] and this could testify that the seawater neutralization treatment is effective also for the reduction of red mud toxicological effects.…”

Section: Eco-toxicological Testsmentioning

confidence: 62%

Reuse of a treated red mud bauxite waste: studies on environmental compatibility

Brunori

Cremisini

Massanisso

et al. 2005

Journal of Hazardous Materials

295

135

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Section: Eco-toxicological Testsmentioning

confidence: 62%

Reuse of a treated red mud bauxite waste: studies on environmental compatibility

Brunori

Cremisini

Massanisso

et al. 2005

Journal of Hazardous Materials

295

135

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“…The level of Fe accumulation was also significantly increased as the concentration of Fe increased in the medium (Figure 2c). Pagano et al (2002) showed that the analytical and toxicity outcomes of red mud are based on ore composition and variable release of toxic contaminants from bauxite byproducts, including their main components Al and/or Fe and some other minor components such as Mn, Zn and Pb. When A. tubingensis was grown in presence of different concentrations of red mud, the mycelial growth increased with the increasing of the concentration of the red mud amended in the medium.…”

Section: Resultsmentioning

confidence: 99%

Aspergillus Tubingensis Reduces the pH of the Bauxite Residue (Red Mud) Amended Soils

Krishna

Reddy

Patnaik³

2005

Water Air Soil Pollut

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Bauxite residue (red mud), a poor substrate for plant growth because of very high pH, salinity and sodicity, is required to be revegetated. The possibility of using Aspergillus tubingensis (AT1), a phosphate solubilizer in red mud amended soils to reduce the alkalinity of the red mud was studied in the present study. A. tubingensis was tested for its ability to grow at high pH and in different concentrations of aluminium (Al), iron (Fe) and sodium (Na). The results showed that A. tubingensis was able to grow at high pH and reduce the alkalinity of the nutrient medium and also to accumulate different metals in the mycelium. The pH values of the red mud amended soils were also significantly reduced (by 2-3 units) by A. tubingensis, which resulted in maize growth improvement. These results suggest that A. tubingensis plays an important role in reducing the pH of the red mud and also helps in promoting the plant growth in it.

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“…Results obtained up to the present (Maddocks et al, 2005;Orešcanin et al, 2003;Brunori et al, 2005b) have not confirmed toxic effects of tested articles or processed red mud on tested organisms (algae, worms, marine gastropods, etc. ), meanwhile unprocessed red mud without neutralisation exhibits toxic effect on water organisms (Pagano et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

“…In the environmental compatibility study of red mud from Italian authors (Brunori et al, 2005b) (Pagano et al, 2002), toxicity of raw red mud on sea urchin embryos was detected because of high alkalinity (pH 12). In various samples from sludge bed of 4 European aluminium works (Turkey, France, Greece and Italy), larval retardation, malformation, development malfunctions and early embryonic mortality were studied.…”

Section: Toxicity Tests and Ecotoxicological Biotestsmentioning

confidence: 99%