ecotoxicology testing Articles | Environmental XPRT

The Predictive Potential of a Battery of Ecotoxicological Tests for Human Acute Toxicity, as Evaluated with the First 50 MEIC Chemicals

Abstract : The acute toxicities of the first 50 chemicals (dextropropoxyphene hydrochloride excluded) of the multicentre evaluation of in vitrocytotoxicity (MEIC) programme were determined on four aquatic invertebrates and a bacterial strain (Photobacterium phosphoreumfor the MicrotoxTM test) commonly used in ecotoxicology testing. Three of the aquatic invertebrate tests consisted of cyst-based ...

Jan. 8, 2020

By Microbiotests Inc.

Characterisation of a bioassay using the marine alga Dunaliella tertiolecta associated with spectroscopic (visible and infrared) detection

This paper describes an ecotoxicological test using the alga Dunaliella tertiolecta associated with visible (VIS) and infrared (FTIR) spectroscopic detection. The estimation of toxicity is performed by measuring the cell density at 432 nm instead of 665 nm the results are comparable with those obtained by conventional visual or automatic estimation of celle density. FTIR spectroscopy gives an ...

Jan. 29, 2008

By Inderscience Publishers

The use of Algae in Ecotoxicological Testing : a Review

Abstract :An intensive review on the use of algae in ecotoxicological testing is herein described. The state of the art in algal toxicity testing is given and the currently applied algal tests in hazard assessment schemes are emphasized. However, the need of an alternative, rapid and cost-effective algal tests is underscored considering the inequality between the plethora of new chemicals being ...

Jan. 8, 2020

By Microbiotests Inc.

Regulatory ecotoxicology testing in Canada – activities and influence of the Inter-Governmental Ecotoxicological Testing Group

The Inter-Governmental Ecotoxicological Testing Group (IGETG) is an ad hoc group of government scientists, technologists, data users, and scientific advisors that has been active in the development and application of ecotoxicological testing in Canada. Membership includes representatives from government laboratories that conduct toxicity testing for research and development purposes, monitor ...

Feb. 7, 2013

By IWA Publishing

Environmental impact assessment for nanotechnologies: integrating the ecological and the chemical perspective

The development and application of products containing engineered nanoparticles (ENP) has dramatically increased over the past decade, whereas the assessment of potential hazards to humans and especially to the environment substantially falls behind. The UFT Centre for Environmental Research and Sustainable Technology at the University of Bremen focuses on environmentally benign nanomaterials. ...

Jun. 6, 2014

By Inderscience Publishers

In Response: Biological arguments for selecting effect sizes in ecotoxicological testing—A governmental perspective

Oct. 23, 2015

By John Wiley & Sons, Ltd.

Measurements of nanomaterials in environmentally‐relevant water matrices using liquid nebulization / differential mobility (LN/DMA) analysis

A liquid nebulization‐differential mobility analysis (LN/DMA) methodology was evaluated for the measurement of the size distribution and quantitative mass concentration of nanomaterials in environmentally relevant aqueous media. The analysis time is 8 min, the method requires little routine sample preparation and less than 8 mL of sample. The method can be used for rapid, direct analysis of ...

Dec. 30, 2014

By John Wiley & Sons, Ltd.

Removal of pharmaceutical residues using ozonation as intermediate process step at Linköping WWTP, Sweden

Pilot tests as basis for the design, implementation and operation of a future full-scale oxidation plant completing the existing sewage treatment in Linköping, Sweden, were performed. Using an ozonation step between bio-sedimentation and post-denitrification processes, the primary goal was the removal of the highest priority substances to effluent water levels that will not cause adverse ...

Jan. 27, 2016

By IWA Publishing

Geochemical and ecotoxicological assessment of iron‐ and steel‐making slags for potential use in environmental applications

Prior to the productive use of iron‐ and steel‐making slags as environmental amendments, a risk assessment supported by material characterization concomitant with leaching and ecotoxicological testing is necessary. Five iron‐ and steel‐making slags were characterized geochemically and the leachability of their elemental constituents assessed. The toxicity of slag leachate to microalgae ...

Aug. 8, 2013

By John Wiley & Sons, Ltd.

More ecological ERA: incorporating natural environmental factors and animal behavior

We discuss herein the importance of selected natural abiotic and biotic factors in ecological risk assessment based on simplistic laboratory bioassays. Although it is impossible to include all possible natural factors in standard lower‐tier ecotoxicological testing, neglecting them is not an option. Therefore, we try to identify the most important factors and advocate re‐designing standard ...

Apr. 29, 2013

By John Wiley & Sons, Ltd.

Sediment contact tests as a tool for the assessment of sediment quality in German waters

A sediment contact test (SCT) battery consisting of five ecotoxicological test systems was applied to 21 native freshwater sediments characterized by a broad variety of geochemical properties and anthropogenic contamination. Higher plants (Myriophyllum aquaticum), nematodes (Caenorhabditis elegans), oligochaetes (Lumbriculus variegatus), zebrafish embryos (Danio rerio), and bacteria ...

Oct. 2, 2012

By John Wiley & Sons, Ltd.

Evaluation of the aerobic and anaerobic biodegradability of the antibiotic norfloxacin

The purpose of studying the biodegradability of pharmaceutical compounds is to evaluate their behaviors in relation to the treatment processes generally used in domestic and industrial wastewater treatment plants. The antibiotic norfloxacin was found to be a recalcitrant compound. The studies conducted showed norfloxacin removal rates of 12% and 18% when biomasses from treatments ...

Jul. 23, 2014

By IWA Publishing

Acute toxicity of nanosize TiO2 to Daphnia magna under UVA irradiation

The production and use of nanoparticles (NPs), especially those of titanium dioxide (TiO2) have increased steadily within the last decade. Common knowledge of photoactive nanosized TiO2 (nTiO2) effects on freshwater organisms is largely limited to acute toxicity tests without taking into consideration solar ultraviolet‐A (UVA) irradiation. The authors' approach in the present study, based on a ...

Aug. 8, 2012

By John Wiley & Sons, Ltd.

Aiptasia pulchella: A tropical cnidarian representative for laboratory ecotoxicological research

An urgent need exists to identify suitable tropical marine species for use in the development of sensitive and reliable test methods for routine laboratory ecotoxicological testing. Corals are a group of organisms not represented in routine ecotoxicology due to inherent difficulties in laboratory husbandry, and sea anemones from the same phylum (cnidaria) may be useful proxies. Aiptasia ...

Aug. 24, 2012

By John Wiley & Sons, Ltd.

Proposal for a “harmonized” strategy for the assessment of the HP 14 property

In Europe, the decision whether waste is hazardous or not is based on 15 properties, among them the HP 14 property (“ecotoxic”: waste which presents or may present immediate or delayed risks for one or more sectors of the environment). This document describes a strategy for assessing the HP 14 property, based on a combination of two approaches: the summation of classified compounds in ...

May 1, 2013

By John Wiley & Sons, Ltd.

USE OF FISH EMBRYO TOXICITY TESTS FOR THE PREDICTION OF ACUTE FISH TOXICITY TO CHEMICALS

The Fish Embryo Test (FET) is a potential animal alternative for the acute fish toxicity (AFT) test. A comprehensive validation program assessed 20 different chemicals to understand intra‐ and inter‐laboratory variability for the FET. The FET had sufficient reproducibility across a range of potencies and modes of action. Here the suitability of the FET as an alternative model is subsequently ...

Apr. 19, 2013

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.

Modelling of Human Acute Toxicity from Physicochemical Properties and Non-Vertebrate Acute Toxicity of the 38 Organic Chemicals of the MEIC Priority List by PLS Regression and Neural Network

Abstract :Linear and non-linear modelling of human acute toxicity (as human lethal concentrations; HLCs) of the 38 organic chemicals from the 50 priority compounds of the Multicentre Evaluation ofIn VitroCytotoxicity (MEIC) programme was investigated. The models obtained were derived either from a set of 23 physicochemicals properties of the compounds of from their acute toxicities to five ...

Jan. 8, 2020

By Microbiotests Inc.

Oral exposure to industrial effluent with exceptionally high levels of drugs does not indicate acute toxic effects in rats

The Patancheru area near Hyderabad in India is recognized as a key link in the global supply chain for many bulk drugs. A central treatment plant receives wastewater from approximately 90 different manufacturers, and the resulting complex effluent has contaminated surface, ground, and drinking water in the region. Ecotoxicological testing of the effluent has shown adverse effects for several ...

Dec. 19, 2012

By John Wiley & Sons, Ltd.

Semifield testing of a bioremediation tool for atrazine‐contaminated soils: Evaluating the efficacy on soil and aquatic compartments

The present study evaluated the bioremediation efficacy of a cleanup tool for atrazine‐contaminated soils (Pseudomonas sp. ADP plus citrate [P. ADP + CIT]) at a semifield scale, combining chemical and ecotoxicological information. Three experiments representing worst‐case scenarios of atrazine contamination for soil, surface water (due to runoff), and groundwater (due to leaching) were performed ...

Apr. 14, 2012

By John Wiley & Sons, Ltd.

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