soil toxicity testing Articles | Environmental XPRT

A highly efficient non‐chemical method for isolating live nematodes (Caenorhabditis elegans) from soil during toxicity assays

The success of soil toxicity tests using Caenorhabditis elegans may depend in large part on recovering the organisms from the soil. However, it can be difficult to learn the ISO/ASTM recovery process that uses the colloidal silica flotation method. The present study determined that a soil‐agar isolation method provides a highly efficient and less technically demanding alternative to the ...

Nov. 12, 2014

By John Wiley & Sons, Ltd.

Improvement of the Caenorhabditis elegans growth and reproduction test to assess the ecotoxicity of soils and complex matrices

A growth and reproduction test using the nematode Caenorhabditis elegans was recently standardized by the International Organization for Standardization. Performing the ISO 10872 protocol (2010) revealed some drawbacks when applied to soil or soil mixed with complex matrices. We propose some modifications to the current protocol in order to normalize the test conditions. An appropriate range ...

May 22, 2013

By John Wiley & Sons, Ltd.

Deriving site‐specific soil clean‐up values for metals and metalloids: Rationale for including protection of soil microbial processes

Although it is widely recognized that microorganisms are essential for sustaining soil fertility, structure, nutrient cycling, groundwater purification and other soil functions, soil microbial toxicity data were excluded from the derivation of Ecological Soil Screening Levels (Eco‐SSL) in the United States. Among the reasons for such exclusion were claims that microbial toxicity tests were too ...

Dec. 27, 2013

By John Wiley & Sons, Ltd.

Evaluation Of Toxic Effects Exhibited By Organic Pollutants Present In Soil

Abstract: Bioassays are widely applied to measure toxic effects of aquatic samples such as surface water and groundwater, leachates and elutriates, as well as sediments, sludges, and soils. Contrary to (eco)toxicity tests, which translate single chemical concentrations into toxic effects (dose-response relationship giving NOEC, EC50, etc.), bioassays are applied to samples from contaminated ...

Jan. 1, 2003

By Microbiotests Inc.

Bioassays used for Detection of Ecotoxicity at Contaminated Areas

Abstract : Ten bioassays were used for the evaluation of acute, (sub)chronic toxicity and genotoxicity of an unknown soil from a military base and six model soils that were contaminated at former military bases with the major pollutants : kerosene, petroleum and used motor oil. The test species represented algae and higher plants, invertebrates and bacteria. The ability to detect toxicants in ...

Jan. 8, 2020

By Microbiotests Inc.

Case Study: Highland Elementary School

Prior to constructing new classroom buildings on newly acquired property adjacent to Highland Elementary School, the California Department of Toxic Substance Control (DTSC) requires that soil testing be conducted as part of a 'Preliminary Endangerment Assessment' (PEA). Ellis is administering testing of soils near existing buildings (lead), and beneath the location of a former hydraulic elevator ...

Sep. 10, 2008

By Ellis Environmental Management, Inc.

$Direct soil contact values for ecological receptors exposed to weathered petroleum hydrocarbon (PHC) fraction 2$

Direct soil contact values for ecological receptors exposed to weathered petroleum hydrocarbon (PHC) fraction 2

Ecological tier 1 Canada‐wide standards (CWS) for petroleum hydrocarbon (PHC) fraction 2 (F2; >nC10–C16) in soil were derived using ecotoxicological assessment endpoints (effective concentrations [ECs]/lethal concentrations [LCs]/inhibitory contrations, 25% [IC25s]) with freshly spiked (“fresh”) fine‐ and coarse‐grained soils. These soil standards might be needlessly conservative when applied to ...

Aug. 4, 2012

By John Wiley & Sons, Ltd.

Quantitative risk assessment for contaminated sites in Spain

Environmental Quantitative Risk Assessment is one of the key factors in the Decision Making Process for contaminated sites. Numerous decisions have to be made before, during and after conducting a quantitative risk assessment.Risk assessment is based on the information gathered previously: Historical information (Phase I) Site characterization (Phase II) Toxicological ...

Oct. 10, 2008

By MediTerra Environmental Consultants, S.L.

Effect of activated carbon or biochars on toxicity of different soils contaminated by mixture of native polycyclic aromatic hydrocarbons and heavy metals

Activated carbon (AC) and biochars (BCS and BCW) were added to the soils sampled from areas of strong anthropogenic influence at doses of 0.5, 1, 2.5 or 5% (w/w) and incubated for two months. At the end of this period, the toxicity of the soils was measured. The effect of AC and biochars on the toxicity of the soils varied based on soil, type of amendment, dose and test organism. For most of ...

Sep. 17, 2015

By John Wiley & Sons, Ltd.

Integrating transcriptomics into triad‐based soil quality assessment

The present study examined how transcriptomics tools can be included in a Triad‐based soil quality assessment to assess the toxicity of soils from river banks polluted by metals. To that end we measured chemical soil properties and used the standardized ISO guideline for ecotoxicological tests and a newly developed microarray for gene expression in the indicator soil arthropod, Folsomia ...

Dec. 31, 2013

By John Wiley & Sons, Ltd.

Adsorption experiment of toxic micro-pollutants derived from automobiles using red soil

In some countries, non-point source pollution derived from a city's economic activities tends to be a barrier to the improvement of water quality. Roadway runoff is known to contain toxic micro-pollutants such as polycyclic aromatic hydrocarbons (PAHs). Conversely, red soil is known to adsorb some organic matter. In this study, artificial roadway runoff water containing toxic micro-pollutants ...

Aug. 18, 2015

By IWA Publishing

Metal Contaminated Soils Fixation

Treatment of Metal Contaminated Soils The EPA requires a Toxicity Characteristic Leaching Procedure (TCLP) test to determine if metal contaminated soils needs to be managed as hazardous or non-hazardous waste. Soils exhibiting hazardous characteristics need to be disposed of at a facility permitted for that material at a high cost. Soils treated in the field prior to off-site disposal can be ...

Aug. 12, 2020

By The TDJ Group, Inc

Comparing soil chemistries of leached and nonleached copper‐amended soils

Leaching metal‐spiked samples has been proposed as a means to reduce the artifacts of the spiking procedure (e.g., salt effect, increased metal solubility) that can artificially increase metal bioaccessibility and toxicity in laboratory ecotoxicity tests. The effects on soil chemistry from leaching Cu‐spiked samples were investigated by comparing chemistries of freshly spiked samples to samples ...

May 31, 2012

By John Wiley & Sons, Ltd.

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