Peer Reviewed: Defining Bioavailability and Bioaccessibility of Contaminated Soil and Sediment is Complicated

Semple, Kirk T.; Doick, Kieron J.; Jones, Kevin C.; Burauel, Peter; Craven, Andrew; Harms, Hauke

doi:10.1021/es040548w

Cited by 581 publications

(304 citation statements)

References 4 publications

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“…However, due to adsorption processes even aerobic biodegradation is often incomplete or significantly slowed down (Fenger et al 1973;Boethling 1984;Tezel et al 2006) and overall rather poor (Hegstad et al 2010a), likely due to sorption processes reducing the bioaccessibility of QAACs. Usually, a portion of the total concentration of a pollutant in soil may be taken up by microorganisms, commonly equated with the so-called bioavailable or bioaccessible fraction (Semple et al 2004;Hatzinger and Alexander 1995;Jechalke et al 2014). This fraction declines usually much faster with time than the total concentration of a pollutant in soil.…”

Section: Persistence Of Qaacs In Soilmentioning

confidence: 99%

Quaternary ammonium compounds in soil: implications for antibiotic resistance development

Mulder

Siemens

Sentek

et al. 2017

Rev Environ Sci Biotechnol

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Quaternary ammonium compounds (QACs) are surface-active, antimicrobial, high production volume (HPV) chemicals with a broad application in agriculture. This review provides a comprehensive overview of (1) predicted and measured concentrations of QACs in soils including their analysis, (2) sequestration mechanisms in soils based on their physicochemical properties and chemical structure, and (3) implications of concentrations and fate of QACs in soils for the proliferation of antibiotic resistance in the environment. Predicted environmental concentrations (PEC) for QACs that are applied to soils with manure are in the order of 3.5 mg kg -1 . Based on literature data, the median PEC of QAC in sewage sludge amended soils is 25 lg kg -1 . The positively charged QACs are mainly sorbed to clay minerals. We propose that QACs might be sequestered in the interlayer regions of layered silicates in clayrich soils, reducing their acute toxicity, while increasing their persistence. The release of sequestered QACs from soil can still potentially maintain concentration levels that are sufficient to develop antibiotic resistance in the environment.

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Section: Persistence Of Qaacs In Soilmentioning

confidence: 99%

Quaternary ammonium compounds in soil: implications for antibiotic resistance development

Mulder

Siemens

Sentek

et al. 2017

Rev Environ Sci Biotechnol

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show abstract

“…More recently, it was concluded that chemical extractions of metals from multi-contaminated soils did not provide enough information about their bioavailable fractions (Alexander 2000;Ehlers and Luthy 2003;Semple et al 2004;Harmsen 2007) and were not able to reflect the toxicity of all substances in soil, their synergic and antagonistic effects and their interactions with the soil matrix and organisms (Gruiz 2005). In this context, th e application of batteries of terrestrial ecotoxicity tests gained special relevance as complementary, inexpensive, simple and quick tools able to report realistic and nonoverestimated effects of contaminated sites to soil organisms (Leitgib et al 2007;Alvarenga et al 2008;Maisto et al 2011;Alvarenga et al 2012;Agnieszka et al 2014;Bes et al 2014;.…”

Section: Introductionmentioning

confidence: 99%

Geochemistry and environmental threats of soils surrounding an abandoned mercury mine

Bori

Vallès

Navarro

et al. 2016

Environ Sci Pollut Res

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The closure of mercury mining areas is generally associated with a release of Hg and other metals into the environment due to the abandonment of mining wastes. Because of their potential toxic properties, the mobilization of particulate and soluble metal species is of major concern. In the present study, the environmental risks posed by soils surrounding an abandoned mercury mining area in Valle del Azogue (Almeria, Spain) are assessed through the determination of physical-chemical parameters, the quantification of metal concentrations, and the application of aquatic and terrestrial ecotoxicity bioassays. Chemical analysis of soil samples revealed concentrations of Hg, As, Ba, Pb, Sb, and Zn above international intervention values. Results from terrestrial tests showed detrimental effects in all studied organisms (Eisenia foetida, Folsomia candida, and different plant species) and revealed the avoidance response of earthworms as the most sensitive endpoint. Surprisingly, the most toxic samples were not the ones with higher metal contents but the ones presenting higher electrical conductivity. Aquatic ecotoxicity tests with Vibrio fischeri, Raphidocelis subcapitata, Daphnia magna, and Danio rerio were in accordance with terrestrial tests, confirming the need to couple environmental chemistry with ecotoxicological tools for the proper assessment of metal-contaminated sites. In view of the results, a remediative intervention of the studied area is recommendedPostprint (author's final draft

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“…Often total metal concentrations are used, taking for granted that environmental risk assessment based on the total concentrations can overestimate risks, and that organisms respond only to the fraction that is biologically available (Alexander, 2000;Ehlers and Luthy, 2003;Semple et al, 2004). Methods to assess available metal concentrations often use extraction with water or a dilute salt solution, but question is: do they really predict "biological availability"?…”

Section: Introductionmentioning

confidence: 99%

Determining the bioavailability and toxicity of lead contamination to earthworms requires using a combination of physicochemical and biological methods

Luo

Verweij

Gestel

2014

Environmental Pollution

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a b s t r a c tThis study aimed at assessing the bioavailability and toxicity of lead to Eisenia andrei in shooting range soils representing different land uses (forest, grassland, bullet plot). Soils contained 47e2398 mg Pb/kg dry weight (dw), but also had different pH-CaCl 2 (3.2e6.8) and organic matter contents (3.8e13%). Therefore artificial soils with different pH and organic matter contents and two natural soils were included as control soils. Earthworms were exposed for 28 days and toxicity and uptake of Pb were related to total, water and 0.01 M CaCl 2 extractable and porewater Pb concentrations as well as to soil characteristics. Pb uptake in the earthworms linearly increased with increasing soil concentrations. At >2000 mg Pb/kg dw and pH 3.3e3.5, high earthworm mortality with significant weight loss and complete inhibition of reproduction were recorded. At <1000 mg/kg dw, earthworm reproduction was more related to differences in pH and other soil characteristics than to Pb.

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Peer Reviewed: Defining Bioavailability and Bioaccessibility of Contaminated Soil and Sediment is Complicated

Cited by 581 publications

References 4 publications

Quaternary ammonium compounds in soil: implications for antibiotic resistance development

Quaternary ammonium compounds in soil: implications for antibiotic resistance development

Geochemistry and environmental threats of soils surrounding an abandoned mercury mine

Determining the bioavailability and toxicity of lead contamination to earthworms requires using a combination of physicochemical and biological methods

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