Importance of the oral arsenic bioaccessibility factor for characterising the risk associated with soil ingestion in a mining-influenced zone

Martínez-Sánchez, María José; Martínez-López, Salvadora; Martinez-Martinez, Lucia Belen; Pérez-Sirvent, Cármen

doi:10.1016/j.jenvman.2012.11.009

Cited by 39 publications

(17 citation statements)

References 23 publications

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“…These include (1) bioaccessibility, which is the elemental component that is released into solution from soil under a chemical digestion, and (2) bioavailable, which is that portion of the bioaccessible component that can be absorbed in the body via the gastrointestinal tract, the pulmonary system, and the skin (e.g., Alexander, 1982;Ruby et al, 1996;Herrchen et al, 1997;Ehlers & Luthy, 2003;Peijnenburg et al, 2007;Hedberg et al, 2010;Luo et al, 2012;Kumpiene et al, 2017). To note just one example of this distinction, in mining-contaminated soils in Spain, Martinez-Sanchez et al (2012) found that whereas total arsenic was dangerously high (well over the 15 ppm soil exposure guidelines for a child set by the ATSDR, 2007), the bioaccessibility of that arsenic was relatively low, and thus, also, the bioavailability was low.…”

Section: Soil Geochemistry and Human Exposure Potentialmentioning

confidence: 99%

New Approaches to Identifying and Reducing the Global Burden of Disease From Pollution

et al. 2020

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Pollution from multiple sources causes significant disease and death worldwide. Some sources are legacy, such as heavy metals accumulated in soils, and some are current, such as particulate matter. Because the global burden of disease from pollution is so high, it is important to identify legacy and current sources and to develop and implement effective techniques to reduce human exposure. But many limitations exist in our understanding of the distribution and transport processes of pollutants themselves, as well as the complicated overprint of human behavior and susceptibility. New approaches are being developed to identify and eliminate pollution in multiple environments. Community-scale detection of geogenic arsenic and fluoride in Bangladesh is helping to map the distribution of these harmful elements in drinking water. Biosensors such as bees and their honey are being used to measure heavy metal contamination in cities such as Vancouver and Sydney. Drone-based remote sensors are being used to map metal hot spots in soils from former mining regions in Zambia and Mozambique. The explosion of low-cost air monitors has allowed researchers to build dense air quality sensing networks to capture ephemeral and local releases of harmful materials, building on other developments in personal exposure sensing. And citizen science is helping communities without adequate resources measure their own environments and in this way gain agency in controlling local pollution exposure sources and/or alerting authorities to environmental hazards. The future of GeoHealth will depend on building on these developments and others to protect a growing population from multiple pollution exposure risks. Plain Language SummaryThe health burdens of legacy contaminants, and the continuing global health burdens of current pollution, are crippling both global health and well-being. Much of the exposure science on these relatively well-studied pollutants is known, as is the general toxicity of past pollutants. But there is a great distance between understanding the toxicity and exposure sources of environmental pollutants and applying that knowledge in practical and just ways. This contribution summarizes several major repositories and ongoing sources of soil, dust, and air pollution and addresses the harmful effects from exposure to these. We also highlight some examples of the future of GeoHealth research in this area by providing case studies of current novel approaches that focus on bridging the science of pollution sources and distribution with real applications at the community level to reduce pollution's role in the global burden of disease.

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Section: Soil Geochemistry and Human Exposure Potentialmentioning

confidence: 99%

New Approaches to Identifying and Reducing the Global Burden of Disease From Pollution

et al. 2020

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“…Human activities have gradually transferred many toxic metals from the earth's crust to the environment, resulting in the spread and contamination of toxic metals in the ecosystem [1][2][3][4]. The metals originate from many sources including mining activities, industrial waste disposals, paints, and gasoline additives that lead to physical and chemical processes such as leaching and oxidation thus causing the accumulation of metals in the soil.…”

Section: Introductionmentioning

confidence: 99%

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Antonângelo

Zhang

2021

Environments

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Little is known about the effect of nitrogen (N) application via biochar on the removal of trace elements by crops, and the effects with chemical fertilizers are inconsistent. We determined, from a previous study, the influence of increased N addition via biochars produced from switchgrass (SGB) and poultry litter (PLB) on cadmium (Cd) removal by ryegrass. The biochar rates of 0, 0.5, 1, 2, and 4% w/w were applied to a Cd-contaminated soil before seeding in a potting experiment with a complete randomized block design (CRBD). Ryegrass yield and N and Cd removed by harvest were strongly related (p < 0.05). The ryegrass yields increased up to 1% of PLB, and Cd removal was also the highest at 1% of PLB. The biomass of ryegrass roots increased with Cd accumulation (p < 0.05). Overall, the Cd transfer factor (TF) from ryegrass roots to shoots increased when up to 206 ± 38 kg N ha−1 was removed in ryegrass shoots (p < 0.0001). The application of PLB up to 1% might be a viable option since it is a practical rate for handling operations requiring less volume of material than SGB. Additionally, the Cd concentration in the aboveground forage remained acceptable for grazing cattle. Future studies are encouraged to evaluate different sources of N fertilizers affecting Cd uptake on cash crops.

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“…The use of pseudo‐total (i.e., aqua regia–extractable) concentrations in the present study is equivalent to the assumption of near‐total bioaccessibility, which could result in an overestimate of risk. An example of the influence of bioaccessibility on risk‐based decision making is provided by Martínez‐Sánchez et al , who concluded that the use of total concentrations in a risk assessment in a mining‐influenced zone in Spain would lead to it being considered contaminated even though it could actually be suitable for agriculture if the oral bioaccessibility of As was contemplated. Lastly, there is a large uncertainty in the default value assigned to several exposure variables.…”

Section: Resultsmentioning

confidence: 99%

Risk assessment from exposure to arsenic, antimony, and selenium in urban gardens (Madrid, Spain)

Miguel

Izquierdo

Gomez

et al. 2016

Enviro Toxic and Chemistry

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The authors discuss the geochemical behavior of arsenic (As), antimony (Sb), and selenium (Se) in urban gardens and the human health implications associated with urban agriculture. A total of 42 samples from 7 urban gardens in Madrid, Spain, were collected from the top 20 cm of soil. Concentrations of As, Sb, and Se and the main soil properties (i.e., total iron, pH, texture, calcium carbonate, and organic matter) were determined. A significant correlation was found between As and Sb and calcium carbonate, indicating the possibility of surface adsorption or ligand exchange with the carbonate group. Also, Sb seemed to form stable chelates with soil organic matter. On the other hand, Se showed a significant association with clay and iron content. The concentration of Sb in soil exceeded the recommended value for agricultural use in 70% of the urban gardens. A human health risk assessment resulted in acceptable levels of both noncarcinogenic and carcinogenic risks (although with elevated values of the latter), with As as the main risk driver and soil and food ingestion as the main exposure pathways. The numerical results of the risk assessment should be interpreted with caution given the considerable uncertainties in some exposure variables and the lack of quantitative values for the suspected carcinogenicity of Sb and Se. Environ Toxicol Chem 2017;36:544-550. © 2016 SETAC.

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Importance of the oral arsenic bioaccessibility factor for characterising the risk associated with soil ingestion in a mining-influenced zone

Cited by 39 publications

References 23 publications

New Approaches to Identifying and Reducing the Global Burden of Disease From Pollution

New Approaches to Identifying and Reducing the Global Burden of Disease From Pollution

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Risk assessment from exposure to arsenic, antimony, and selenium in urban gardens (Madrid, Spain)

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