Ecological risk assessment of contaminated soils through direct toxicity assessment

Fernández, María Dolores; Montalbán, Ekain Cagigal; Vega, M.M.; Urzelai, Arantzazu; Babín, Mar; Pro, Javier; Tarazona, José V.

doi:10.1016/j.ecoenv.2004.11.013

Cited by 110 publications

(44 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, it has been reported that physicochemical analysis such as COD and TOC alone cannot sufficiently and effectively evaluate the safety of environmental water samples (Fernandez et al, 2005). Biological toxicity tests are a useful tool for investigating the effects of all the bioavailable contaminants and their interactions, and they are widely used to evaluate the safety of environmental samples.…”

Section: Toxicity Removalmentioning

confidence: 99%

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

View full text Add to dashboard Cite

h i g h l i g h t sMBR-NF with NF concentrate recycling was tested for antibiotic-wastewater treatment. The system was effective for antibiotic production wastewater treatment and reuse. The MBR-NF process resulted in excellent water quality and a high water yield of 92%. Organic pollutants in the wastewater were almost completely retained by the NF. a r t i c l e i n f o b s t r a c tA double membrane system comprising a membrane bioreactor (MBR) combined with a nanofiltration (NF) membrane was investigated on a pilot scale for the treatment of antibiotic production wastewater over a three-month period at a pharmaceutical company in Wuxi, China. By recycling the NF concentrate, the combined MBR-NF process was shown to be effective for the treatment of antibiotic production wastewater, resulting in excellent water quality and a high water yield of 92 ± 5.6%. The water quality of the pilot-scale MBR-NF process was excellent; e.g., the concentrations of TOC, NH 4 + -N, TP were stable at 5.52, 0.68, 0.34 mg L À1 , respectively, and the values of turbidity and conductivity of the NF permeate were 0.15 NTU and 2.5 mS cm À1 , respectively; these values meet China's water quality standard requirements for industrial use (GB21903-2008). Not only were the antibiotic removal rates of spiramycin (SPM) and new spiramycin (NSPM) over 95%, the acute toxicity was also drastically reduced by the MBR-NF pilot system. The main organics in the MBR effluent were proteins, polysaccharides, and humic-like substances; they were almost completely retained by the NF membrane and further biodegraded in the MBR because the NF concentrate was recycled. The microbial community of the MBR did not significantly change with the recycling of the NF concentrate.

show abstract

Section: Toxicity Removalmentioning

confidence: 99%

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

View full text Add to dashboard Cite

show abstract

“…To achieve this goal, autochthonous populations of hydrocarbon degraders can be stimulated under certain environmental conditions (temperature, soil moisture, nutrients, etc) and their success in reducing hydrocarbons contents can be evaluated through chemical analyses. However, those analyses have proven insufficient for a proper characterization of the overall soil quality because they are unable to identify all compounds in soil (Fernandez et al 2005). Moreover, they cannot detect toxic intermediary metabolites that increase soil toxicity (Haeseler et al 2001;Loibner et al 2003) nor provide information on bioavailability, synergic, and antagonistic phenomena (Juvonen et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Bioassays with terrestrial and aquatic species as monitoring tools of hydrocarbon degradation

Bori¹,

Vallès²,

Ortega³

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

In this study chemical analyses and ecotoxicity tests were applied for the assessment of a heavily hydrocarbon-contaminated soil prior and after the application of a remediation procedure that consisted in the stimulation of soil autochthonous populations of hydrocarbon degraders in staticventilated biopiles. Terrestrial bioassays were applied in mixtures of test soils and artificial control soil and studied the survival and reproduction of Eisenia fetida and the avoidance response of E. fetida and Folsomia candida. Effects on aquatic organisms were studied by means of acute tests with Vibrio fischeri, Raphidocelis subcapitata and Daphnia magna performed on aqueous elutriates from test soils. The bioremediation procedure led to a significant reduction in the concentration of hydrocarbons (from 34264 mg kg -1 to 3074 mg kg -1 i.e. 91% decrease) and toxicity although bioassays were not able to report a percentage decrease of toxicity as high as the percentage reduction. Sublethal tests proved the most sensitive terrestrial bioassays and avoidance tests with earthworms and springtails showed potential as monitoring tools of hydrocarbon remediation due to their high sensitivity and short duration. The concentrations of hydrocarbons in water extracts from test soils were 130 µg L -1 and 100 µg L -1 before and after remediation, respectively. Similarly to terrestrial tests, most aquatic bioassays detected a significant reduction in toxicity, which was almost negligible at the end of the treatment. D. magna survival was the most affected by soil elutriates although toxicity to the crustacean was associated to the salinity of the samples rather than to the concentration of hydrocarbons. Ecotoxicity tests with aqueous soil elutriates proved less relevant in the assessment of hydrocarbon-contaminated soils due to the low hydrosolubility of hydrocarbons and the influence of the physicochemical parameters of the aquatic medium.

show abstract

“…However, the total concentration has been demonstrated not to be directly responsible for the exposure risk of metals to soil biota Giller et al 1998;Lofts et al 2004;Nriagu and Pacyna 1988). Thus, there is an increasing need to incorporate toxicity tests in risk assessments and the establishment of site-specific guidelines for metals in soils (Fernandez et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Leaching impacts Ni toxicity differently among soils but increases its predictability according to nitrification assay

Huang

et al. 2009

J Soils Sediments

View full text Add to dashboard Cite

Purpose Deriving toxicity thresholds through bioassays has become the scientific basis for the risk assessment of metal contamination in soils, but few studies have been reported for Ni toxicity in Chinese soils. In addition, although leaching has been recommended to increase the ecological relevance of the output of soil toxicity bioassays, its impacts on Ni threshold and soil solutions in soils remained to be shown. Therefore, in this study, 17 soils were collected throughout China and were assessed for Ni toxicity using substrate-induced nitrification (SIN) assay for both un-leached and leached treatments. Meanwhile, soil solutions of all Ni treatments were extracted and analyzed. This study provides information for the development of a terrestrial biotic ligand model (TBLM) for Ni in Chinese soils.Materials and methods Soils were artificially amended with NiCl 2 solution to generate nominal Ni contamination levels, and aliquot of each Ni treatment was leached with artificial rain to prepare leached soil samples. All the 17 unleached and the 17 leached soils were subjected to the standard SIN protocol. A total of 816 microcosm tubes were established. Soil solution was extracted, and the solution physiochemical properties were analyzed for each Ni treatments. Both the total-Ni-based and the solution-Nibased median effective concentrations (EC50) in unleached soils and leached soils were calculated from dose-response curves. Free-Ni 2+ -based EC50 was also calculated based on solution chemical properties. Leaching effect was assessed based on these results. Results and discussion Ni EC50 varied largely among soils for both the total-Ni-based and the solution-Ni-based EC50 in un-leached soils. In un-leached soils, the total-Ni-based EC50 values ranged from 52.8 mg kg −1 (Hulunber soil) to 2,385.4 mg kg −1 (Wulumuqi soil), and the solution-Nibased EC50 ranged from 0.70 mg L −1 (Jiaxing soil) to 293.35 mg L −1 (Wulumuqi soil). Stepwise multiple regressions showed that soil pH and total Ca were the best predictors for the total-Ni-based EC50. Protective effects of Ca 2+ and Mg 2+ but not H + against Ni toxicity in soil solution were found. Leaching impacted Ni EC50 differently among soils, with leaching factor ranging from 0.2 (Haikou soil) to 19.7 (Hulunber soil) for the total-Ni-based EC50 and from 0.1 (Dezhou soil) to 35.7 (Jiaxing soil) for the solution-Ni-based EC50. In addition, predictability of Ni EC50 was higher in leached soils. The variations in Ni EC50 were in agreement with the findings in previous studies. Soil pH and Ca may play important roles in the partition of Ni in Chinese soils and thus impact the Ni toxicity. Protective effects of Ca 2+ and Mg 2+ in soil solutions against Ni toxicity may exist, but the role of H +

show abstract

Ecological risk assessment of contaminated soils through direct toxicity assessment

Cited by 110 publications

References 23 publications

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Bioassays with terrestrial and aquatic species as monitoring tools of hydrocarbon degradation

Leaching impacts Ni toxicity differently among soils but increases its predictability according to nitrification assay

Contact Info

Product

Resources

About