Baseline Levels of Metals in Volcanic Soils of the Azores (Portugal)

Amaral, André F.S.; Cruz, J. Virgílio; Cunha, Regina Tristão da; Rodrigues, Armindo

doi:10.1080/15320380500506255

Cited by 29 publications

(16 citation statements)

References 21 publications

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“…The rainwater pH in the Azores is near 6.7 (Rodrigues et al, 2002), and is not sufficiently acid for producing the Na + -H 3 O + inter-diffusion. However, the water in volcanic Azorean soils has a pH around 5.5 to 5.7 (Amaral et al, 2006) making it possible to generate the mentioned cationic exchange.…”

Section: Sample Genesis and Experimental Confirmation Of Packed Micromentioning

confidence: 99%

Early Atlantic Navigation: Pre-Portuguese Presence in the Azores Islands

Rodrigues¹,

Martins²,

Ribeiro³

et al. 2015

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We present here evidence of pre-Portuguese presence in the Azores Islands, Portugal, found near the site of Grota do Medo (Posto Santo), discovered by Rodrigues (2013) in Terceira Island, Azores. This evidence was dated by Accelerator Mass Spectrometry, and indicates the presence of human activity in Terceira Island before or during the XI th century. The evidence consisted in a man-made rock basin, which was found in a site that contains also striking similarities with many other aspects from ancient cultures, including other man-made rock basins, arrangements of large stones which resemble megalithic constructions, and inscriptions in stones which resemble ancient petroglyphs. Although the dating of this evidence is highly suggestive of the presence of human activity in the Azores Islands long before the arrival of the Portuguese navigators of the XV th century, there is no clear evidence which enables us to identify which specific culture may have existed in the Azores before the Portuguese arrival.

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Section: Sample Genesis and Experimental Confirmation Of Packed Micromentioning

confidence: 99%

Early Atlantic Navigation: Pre-Portuguese Presence in the Azores Islands

Rodrigues¹,

Martins²,

Ribeiro³

et al. 2015

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“…These clays have a greater metal sorption capacity (Hooda and Alloway, 1998), which can promote iodine retention to the soil (Fuge, 2005). Such metal sorption capacity was already demonstrated in the study of Amaral et al (2006) that revealed higher levels of Fe oxides in Santa Maria soils.…”

Section: Discussionmentioning

confidence: 74%

“…It is also important to consider that Azorean soils are of volcanic origin but each island has specific soil characteristics: Our results demonstrated significant differences in pH and organic matter content that can influence the iodine content and its mobility (Mehra et al, 2014). However the most relevant difference in the soils of these two islands is the occurrence in Santa Maria soils of a higher fraction of clay minerals that can be as high as 50% (Amaral et al, 2006). These clays have a greater metal sorption capacity (Hooda and Alloway, 1998), which can promote iodine retention to the soil (Fuge, 2005).…”

Section: Discussionmentioning

confidence: 79%

Iodine environmental availability and human intake in oceanic islands: Azores as a case-study

Linhares

Garcia

Almada

et al. 2015

Science of The Total Environment

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“…This is because the diffusion of acidic volcanic gases through water permeable rocks contributes to the hydrological material transfer in volcanic strata. The activities from volcanoes are reported to be responsible for the release of metals such as arsenic, mercury, aluminum, rubidium, lead, magnesium, copper, zinc and a host of others (Amaral et al, 2006).…”

Section: Sources Of Heavy Metals In Wastewater Effluentmentioning

confidence: 99%

Heavy Metal Pollutants in Wastewater Effluents: Sources, Effects and Remediation

Akpor¹

2014

ABB

219

136

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Abstract:Heavy metals, also known as trace metals, are one of the most persistent pollutants in wastewater. The discharge of high amounts of heavy metals into water bodies leads to several environmental and health impacts. The exposure of humans to heavy metals can occur through a variety of routes, which include inhalation as dust or fume, vapourisation and ingestion through food and drink. Some negative impacts of heavy metals to aquatic ecosystems include death of aquatic life, algal blooms, habitat destruction from sedimentation, debris, increased water flow, other short and long term toxicity from chemical contaminants. Abundant amounts of heavy metals present in soils cause reduction in quality and quantity of food preventing plants' growth, uptake of nutrients, physiological and metabolic processes. Severe effects on animals may include reduced growth and development, cancer, organ damage, nervous system damage, and in extreme cases, death. To help mitigate the negative impacts of heavy metals on the health of humans, animals and the environment, a variety of remediation processes exists. These remediation processes are broadly classified into chemical and biological, although the latter is advocated in recent years. Biological remediation processes (microbial remediation and phytoremediation) are indicated to be very effective in the treatment of heavy metal pollutants in wastewater. Microbial remediation is the restoration of the environment and its quality using microorganisms, such as bacteria, fungi, protozoan and algae while phytoremediation is the use of plants to degrade or accumulate toxic metals, thereby leading to a reduction in the bioavailability of the contaminant in the soil or water. This paper was therefore aimed at reviewing the sources, impacts and remediation processes for heavy metals in wastewater.

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Baseline Levels of Metals in Volcanic Soils of the Azores (Portugal)

Abstract: Data on metal concentrations present in the soils of the Azores (Portugal)

Cited by 29 publications

References 21 publications

Early Atlantic Navigation: Pre-Portuguese Presence in the Azores Islands

Early Atlantic Navigation: Pre-Portuguese Presence in the Azores Islands

Iodine environmental availability and human intake in oceanic islands: Azores as a case-study

Heavy Metal Pollutants in Wastewater Effluents: Sources, Effects and Remediation

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