Estimates of ambient background concentrations of trace metals in soils for risk assessment

Zhao, Fang; McGrath, Steve P.; Merrington, Graham

doi:10.1016/j.envpol.2006.10.041

Cited by 89 publications

(67 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Often this is realized using tiered approaches, i.e., starting from relatively simple but ecologically less relevant, towards more complex but ecologically more relevant methods. For example, for metals, precautionary monitoring programmes may initially sample 'total' trace element concentrations, undertaking dissolved measurements as a first refinement step and only initiating bioavailability measurement, modelling and/or direct toxicity assessments at sampling sites where potential risks are identified (ANZECC and ARMCANZ 2000a; Figure 1 Alternately, modelling methods used to estimate ABCs in soils (Hamon et al 2004;Zhao et al 2007) could, with modification, offer potential. It is, arguably, a policy-based approach to deliver a pragmatic fix for local assessments and management decisions.…”

Section: Whilst Biological and Chemical Sampling Is To Be Undertaken mentioning

confidence: 99%

Water quality guidelines for chemicals: learning lessons to deliver meaningful environmental metrics

Merrington

Grist

et al. 2013

Environ Sci Pollut Res

View full text Add to dashboard Cite

Many jurisdictions around the globe have well developed regulatory frameworks for the derivation and implementation of water quality guidelines (WQGs) or their equivalent (e.g. environmental quality standards, criteria, objectives or limits). However, a great many more still do not have such frameworks and are looking to introduce practical methods to manage chemical exposures in aquatic ecosystems. There is a potential opportunity for learning and sharing of data and information between experts from different jurisdictions in order to deliver efficient and effective methods to manage potential aquatic risks, including the considerable reduction in the need for aquatic toxicity testing and the rapid identification of common challenges. This paper reports the outputs of an international workshop with representatives from 14 countries held in Hong Kong in December 2011. The aim of the workshop and this paper was to identify 'good practice' in the development of WQGs to deliver to a range environmental management goals. However, it is important to broaden this consideration to cover often overlooked facets of implementable WQGs, such as demonstrable field-validation (i.e., does the WQG protect what it is supposed to?), fit for purpose of monitoring frameworks (often an on-going cost) and finally how are these monitoring data used to support management decisions in a manner that is transparent and understandable to stakeholders. It is clear that regulators and the regulated community have numerous pressures and constraints on their resources. Therefore the final section of this paper addresses potential areas of collaboration and harmonisation. Such approaches could deliver a consistent foundation from which to assess potential chemical aquatic risks, including, for example, the adoption of bioavailability-based approaches for metals, whilst reducing administrative and technical burdens in jurisdictions.

show abstract

Section: Whilst Biological and Chemical Sampling Is To Be Undertaken mentioning

confidence: 99%

Water quality guidelines for chemicals: learning lessons to deliver meaningful environmental metrics

Merrington

Grist

et al. 2013

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…The similar results have been documented by Sundaray et al (2011) 49 when RAC was assessed in the Mahanadi river estuarine sediments in India. Similarly, Zhao et al (2007) 50 concluded that the concentrations of Cr and Ni were strongly associated with Al and Fe fraction in soils collected from England and Wales, and therefore Al-Fe fraction in the experimental soils can be used to predict ambient background concentrations of trace metals in soils.…”

Section: Distribution Pattern and Risk Assessment Code (Rac) Of Heavymentioning

confidence: 99%

nfluence of Metals In Soil on The Comparative Phyto chemical Characterization and Antioxidant Study of Indian Golden Shower (Cassia Fistula)

Das¹,

Dang²,

Sutar³

et al. 2016

IJPER

View full text Add to dashboard Cite

Objective: This paper highlighted the effect of selected soil containing metals, viz. Cd, Cr, Cu, Fe, Ni, Pb and Zn on the biochemical compositions and antioxidant activity in leaf of 20 years old two Cassia fistula L. (CF) cultivars. The leaf samples were collected from CF grown on road sides from the states of Maharashtra and Karnataka in India. Methods: Antioxidant activity and total phenol contents from methanolic and aqueous leaf extract were evaluated by assays like oxygen radical absorbance capacities (ORAC), 2, 2 / -Azino-bis (3-ethylbenzothiozoline-6-sulphonic acid) diammonium salt (ABTS) and folin-ciocalteu reagent methods respectively. Maximum dose dependent antioxidant activity was observed in methanol leaf extract of both the cultivars, but marginal variation observed in antioxidant activity. Results: The result revealed that total phenolic content was maximum in the methanolic leaf extract (11.40 ± 0.37 mg g −1 of gallic acid equivalent). A positive correlation between antioxidant activity and total phenol compounds was noticed from both the samples. Furthermore a significant correlation was observed between element contents and antioxidant activities. Conclusion: This was may be due to elements like Fe, Cu, and Zn for accumulation of secondary constituents in the methanolic leaf extract that are major contributors to the antioxidant potential of CF. There were no other heavy metals (Ni, Cd, Pb and Cr) reported in both the samples.

show abstract

“…Se han realizado varios estudios en diferentes regiones del mundo para estimar el valor de fondo geoquímico y la concentración de línea base de elementos traza (Gough et al 1994, Tobías et al 1997, Chen et al 1999, Zhao et al 2007, Bini et al 2011. De acuerdo con lo expuesto, en este estudio se calculó el Igeo como una herramienta de calidad para determinar el grado de contaminación por metales, en este caso Hg.…”

Section: Discussionunclassified

Impacto De La Minería Del Oro Asociado Con La Contaminación Por Mercurio en Suelo Superficial De San Martín De Loba, Sur De Bolívar (Colombia)

Rocha-Román

Olívero-Verbel

Caballero-Gallardo

2018

Rev. Int. Contam. Ambie.

View full text Add to dashboard Cite

Palabras clave: toxicidad, ambiente, actividades antrópicas, salud humana RESUMEN Las actividades humanas han aumentado la contaminación por mercurio (Hg) en los ambientes terrestres, especialmente en áreas de minería de oro. El objetivo de este estudio fue evaluar las concentraciones de mercurio total (Hg-t) en muestras de suelo superficial de San Martin de Loba, sur de Bolívar (Colombia), así como determinar el nivel de contaminación en el suelo. Un total de 202 muestras de suelo superficial fueron colectadas en San Martín de Loba. Los niveles de Hg-t fueron medidos por atomización electrotérmica y espectroscopia de absorción atómica. Las concentraciones de Hg-t variaron de 0.002 a 23.83 μg/g, con un valor medio de 3.40 ± 0.36 μg/g, el cual es ligeramente más alto que para el Hg en suelo a nivel mundial. El índice de geo-acumulación (Igeo) para suelo alcanzó valores superiores a 5, indicando una contaminación extrema (Clase 6) en el 17 % de las muestras, mientras que el 70 % fueron Clase 5 (fuertemente a extremadamente contaminado). Este estudio también ofrece un mapa de riesgos para evaluar las posibles repercusiones negativas. En conclusión, el municipio de San Martín de Loba puede considerarse una zona fuertemente contaminada con alto contenido de Hg. La tecnología utilizada para extraer oro a lo largo de los procesos de amalgamación provoca un alto grado de contaminación por Hg en torno a esta área de minería de oro. Por lo tanto, deben considerarse métodos alternativos de extracción para reducir los niveles de Hg que pueden liberarse al ambiente y afectar la salud humana.Key words: toxicity, environment, anthropogenic activities, human health ABSTRACT Human activities have increased mercury (Hg) contamination of terrestrial environments, especially gold mining areas. The aim of this study was to evaluate total Hg concentrations (T-Hg) in surface soil samples of San Martín de Loba, south of Bolívar (Colombia), to determine their Hg contamination level. For that purpose, 202 surface soil samples were collected. T-Hg levels were measured by electrothermal atomization and atomic absorption spectroscopy. The T-Hg surface soil concentrations ranged between 0.002 and 23.83 μg/g, with a median value of 3.40 ± 0.36 μg/g, which is

show abstract

Estimates of ambient background concentrations of trace metals in soils for risk assessment

Cited by 89 publications

References 18 publications

Water quality guidelines for chemicals: learning lessons to deliver meaningful environmental metrics

Water quality guidelines for chemicals: learning lessons to deliver meaningful environmental metrics

nfluence of Metals In Soil on The Comparative Phyto chemical Characterization and Antioxidant Study of Indian Golden Shower (Cassia Fistula)

Impacto De La Minería Del Oro Asociado Con La Contaminación Por Mercurio en Suelo Superficial De San Martín De Loba, Sur De Bolívar (Colombia)

Contact Info

Product

Resources

About