environmental fate Articles

Environmental exposure assessment of engineered nanoparticles: why REACH needs adjustment

Engineered nanomaterials (ENMs) possess novel properties making them attractive for application in a wide spectrum of fields. These novel properties are not accounted for in the environmental risk assessment methods REACH proposes in their guidance on environmental exposure estimation, although ENMs are already applied in a variety of consumer and industrial products. It is thus necessary to ...

May 1, 2013

By John Wiley & Sons, Ltd.
Fate of As(V)-treated nano zero-valent iron: Determination of arsenic desorption potential under varying environmental conditions by phosphate extraction

Nano zero-valent iron (NZVI) offers a promising approach for arsenic remediation in the subsurface environment, but the spent NZVI with elevated arsenic content left unattended at treated sites in subsurface could arouse safety concerns regarding the potential remobilization of arsenic under varying geochemical conditions. This paper presents a systematic study aimed at investigating the fate of ...

Jul. 24, 2014

By IWA Publishing
Effect of co-existing copper and calcium on the removal of As(V) by reused aluminum oxides

Among the various heavy metals, arsenic is frequently found in abandoned mine drainage and the environmental fate of arsenic in real aqueous solutions can be highly dependent on the presence of co-existing ions. In this study, removal of arsenate through adsorption on the reused aluminum oxide or through precipitation was investigated in a single and in a binary system as a function of pH and ...

Nov. 6, 2012

By IWA Publishing
Understanding QSPR uncertainty in environmental fate modeling

In cases where experimental data on chemical‐specific input parameters are lacking, chemical regulations allow the use of alternatives to testing, such as in silico predictions based on quantitative structure‐property relationships (QSPRs). Such predictions are often given as point estimates; however, little is known about to what extent uncertainties associated with QSPR predictions contribute ...

Feb. 21, 2013

By John Wiley & Sons, Ltd.
Influence of global climate change on chemical fate and bioaccumulation: The role of multimedia models

Multimedia environmental fate models are valuable tools for investigating potential changes associated with global climate change, particularly because thermodynamic forcing on partitioning behavior as well as diffusive and nondiffusive exchange processes are implicitly considered. Similarly, food‐web bioaccumulation models are capable of integrating the net effect of changes associated with ...

Nov. 8, 2012

By John Wiley & Sons, Ltd.
On the formulation of environmental fugacity models and their numerical solutions

Multimedia models based on chemical fugacity, solved numerically, play an important role in investigating and quantifying the environmental fate of chemicals such as persistent organic pollutants (POPs). These models have been utilised extensively in the study of the local and global distribution of chemicals in the environment. This paper describes potential sources of error that may arise ...

Feb. 17, 2016

By John Wiley & Sons, Ltd.
Bioaccumulation of fullerene (C60) and corresponding catalase elevation in Lumbriculus variegatus

Fullerene (C60) with its unique physical properties and nanometer size has been mass produced for many applications in recent decades. The increased likelihood of direct fullerenes release into the environment has raised interest in understanding both environmental fate and corresponding biological effects of fullerenes to living organisms. Since few studies have emphasized fullerene uptake ...

Jan. 29, 2014

By John Wiley & Sons, Ltd.
Environmental fate and behavior of acesulfame in laboratory experiments

Acesulfame is a widely used artificial sweetener. It can be discharged into surface water by domestic wastewater due to its incomplete retention during wastewater treatment. Concentrations may reach up to 10 μg/L for smaller rivers. State-of-the-art analysis allows the determination of acesulfame traces (0.01 μg/L) and thus a potential tracking of the presence of wastewater in riverbank ...

Sep. 28, 2016

By IWA Publishing
Aquatic environmental risk assessment for human use of the old antibiotic sulfamethoxazole in europe

Sulfamethoxazole (SMX) is an old sulfonamide antibiotic that was launched first in combination with Trimethoprim in 1969 by F.Hoffmann‐La Roche Ltd. While sales figures for SMX have been declining over the past 20 years, it is still a widely used compound; moreover, there are many measured environmental concentrations (MECs) available from Europe, the USA, Asia, Australia and Africa. To assess ...

Feb. 18, 2015

By John Wiley & Sons, Ltd.
Degradation and transformation of 17α‐estradiol in water‐sediment systems under controlled aerobic and anaerobic conditions

17α‐Estradiol is one of the principal metabolites in cattle excreta following the administration of Synovex® ONE, which contains estradiol benzoate (EB) and trenbolone acetate (TBA). As part of the environmental assessment of the use of Synovex® ONE, data were generated to characterize the fate of 17α‐estradiol in the environment. Studies were conducted to determine the degradation and ...

Jan. 23, 2016

By John Wiley & Sons, Ltd.
Challenges for exposure prediction in Ecological Risk Assessment

Evaluating organism exposure in the ecosystems is a difficult task and can be carried out measuring or predicting concentrations in the environment. While current regulatory approaches favour a modelling approach, they either use a static representation of the environment and of the chemical discharge or a simplified dynamic approach (e.g. dealing with pesticides). Improving the ecological ...

Apr. 22, 2013

By John Wiley & Sons, Ltd.
Environmental fate of nanoparticles: physical chemical and biological aspects – a few snapshots

The environmental risk that nanomaterials can undergo is a major problem, which could prevent the commercial development of nanoproducts, especially in technology domains corresponding to large distribution: cosmetics, composite materials, civil engineering materials and leisure materials. The risk assessment is based on a complex approach, which implies the knowledge of the degradation ...

Feb. 7, 2012

By Inderscience Publishers
Environmental fate of three novel brominated flame retardants in aquatic mesocosms

Currently, little is known about the environmental fate and persistence of novel brominated flame retardants (NBFRs). The recent detection of NBFRs in sediment cores and air samples provides insight into their persistence and potential for transport. Limited numbers of laboratory studies have examined the fate and behavior of these compounds, but field‐based fate studies have been especially ...

Feb. 11, 2013

By John Wiley & Sons, Ltd.
Policy by analogy: precautionary principle, science and polybrominated diphenyl ethers

Through the acquisition of scientific data, knowledge is gained about the environmental fate and human exposure of chemical substances. From this knowledge, the risk of using chemicals can be assessed. As a means of facilitating the regulatory process, risk assessments can also compare the substance under investigation to other substances that display similar behaviour or structure, especially ...

Feb. 14, 2005

By Inderscience Publishers
Assessing predictive uncertainty in comparative toxicity potentials of triazoles

Comparative Toxicity Potentials (CTPs) quantify the potential ecotoxicological impacts of chemicals per unit of emission. They are the product of a substance's environmental fate, exposure, and hazardous concentration. When empirical data are lacking, substance properties can be predicted. The goal of this study was to assess the influence of predictive uncertainty in substance property ...

Oct. 14, 2013

By John Wiley & Sons, Ltd.
Combining exposure and effect modelling into an integrated probabilistic environmental risk assessment for nanoparticles

There is a growing need for good environmental risk assessment of engineered nanoparticles (ENPs). Environmental risk assessment of ENPs has been hampered by lack of data and knowledge about ENPs, their environmental fate and their toxicity. This leads to uncertainty in the risk assessment. To effectively deal with uncertainty in the risk assessment, probabilistic methods are advantageous. In ...

May 5, 2016

By John Wiley & Sons, Ltd.
A screening study on the fate of fullerenes (nC60) and their toxic implications in natural freshwaters

Increasing usage of fullerenes (C60) increases their opportunities to be released into the environment. For risk assessment, it is important to understand the environmental fate and ecotoxicological effects of C60. In this study, fullerene settling was measured during a one‐year period with four different lake waters and an artificial freshwater, and D. magna immobilization and fullerene ...

Feb. 12, 2013

By John Wiley & Sons, Ltd.
A simple method to determine mineralization of 14C‐labeled compounds in soil

Degradation of organic compounds in soil is often determined by measuring decrease of parent compound and analyzing occurrence of its metabolites. However, determination of carbon species as end products of parent compound dissipation requires the use of labeled materials which allow more accurate determination of the environmental fate of the compound of interest. The current conventional ...

Feb. 23, 2014

By John Wiley & Sons, Ltd.
Human health risk assessment of triclosan in land‐applied biosolids

Triclosan (TCS; 5‐chloro‐2‐[2,4‐dichlorophenoxy]‐phenol) is an antimicrobial agent found in a variety of pharmaceutical and personal care products. Numerous studies have examined the occurrence and environmental fate of TCS in wastewater, biosolids, biosolids‐amended soils, and plants and organisms exposed to biosolids‐amended soils. TCS has a propensity to adhere to organic carbon in ...

Jan. 14, 2016

By John Wiley & Sons, Ltd.
Characterization of trenbolone acetate and estradiol metabolite excretion profiles in implanted steers

Exogenous growth promoters have been used in United States beef cattle production for over 50 years. The environmental fate and transport of steroid growth promoters suggest potential for endocrine disrupting effects among ecological receptors; however, the initial excretion of steroid metabolites from cattle administered growth promoters has not been well characterized. To better characterize ...

Sep. 22, 2014

By John Wiley & Sons, Ltd.

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you