The soil

Wiklander, Lambert

doi:10.1007/978-3-642-94729-2_6

Cited by 2 publications

(5 citation statements)

References 106 publications

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“…Contrary to phosphate, nitrate is not sorbed in soils at the pH levels prevailing in most soils of large parts of the world [18]. Furthermore, the clay fractions of these soils are dominated by clay minerals, such as illite and montmorillonite, with moderate to high amounts of negative charges and virtually no positive charges.…”

Section: Nitrogenmentioning

confidence: 94%

“…Furthermore, the clay fractions of these soils are dominated by clay minerals, such as illite and montmorillonite, with moderate to high amounts of negative charges and virtually no positive charges. Apart from not being adsorbed, nitrate is subject to "negative adsorption" [18], i.e., being repelled by the negative charges and pushed into the soil solution. Nitrate is consequently highly mobile in soils, and a large proportion of it is leached out of the soil, leading to eutrophication of water bodies and N deficiencies in crops.…”

Section: Nitrogenmentioning

confidence: 99%

“…Recent discussions from an environmental perspective on the fixation of P in soils almost exclusively treat it as a simple adsorption process (e.g., Vardhan et al [1]. The reality is that fixation (sorption) of phosphorus in soils, especially strong fixation, entails much more than adsorption [18,19] Strong fixation of large quantities of P occurs in highly weathered, strongly acidic soils, such as those found in humid tropical and subtropical areas. In these soils, large quantities of P is fixed into forms that are not plant-available, unlike the situation in the red and yellow-brown sandy soils described above.…”

mentioning

confidence: 99%

“…Thus, kaolinite has only a small number of negative charges. It dominantly has variable charge that is pH dependent [4,18]. These charges originate from reactions at exposed hydroxyl groups of alumina octahedra at broken edges of the mineral [18].…”

mentioning

confidence: 99%

“…It dominantly has variable charge that is pH dependent [4,18]. These charges originate from reactions at exposed hydroxyl groups of alumina octahedra at broken edges of the mineral [18]. It develops both negative and positive charges.…”

mentioning

confidence: 99%

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Factors That Determine the Sorption of Mineral Elements in Soils and Their Impact on Soil and Water Pollution

Nortjé

Laker

2021

Minerals

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Soil is an essential ecosystem, delivering valuable services such as the provision of food, energy and raw materials, carbon sequestration, water purification and infiltration, nutrient regulation, pest control and recreation. Therefore, soil is crucial for fighting climate change, protecting human health, safeguarding biodiversity and ecosystems and ensuring food security. Pollution of the soil by organic and inorganic substances is, therefore, detrimental to ecosystem services and/or human health. Heavy metals at harmful concentrations are highly detrimental, and here, mining activities are one of the main sources of soil pollution. According to studies conducted, some of the major soil factors affecting mineral (including P) sorption are time, soil pH, soil organic matter and iron and aluminum oxides of soils. This paper looks at sources of mineral element pollution, including heavy metals, as heavy metals are toxic to all living organisms, including humans. This paper also reviews both cationic heavy metals and inorganic anionic pollutants, such as phosphate and arsenic, as well as cationic, non-heavy-metal pollutants such as nitrogen and potassium.

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Section: Nitrogenmentioning

confidence: 94%

Section: Nitrogenmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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