Managing adverse soil chemical environments

Hodson, Mark E.; Donner, Erica

doi:10.1002/9781118337295.ch7

Cited by 14 publications

(11 citation statements)

References 198 publications

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“…In soils of South Africa (a country sharing borders with Swaziland), normal Zn concentration is given as 112e115 mg kg À1 (Kabata-Pendias, 2011). Cu was also lower than concentrations considered to be critical, which according to Ye et al, 2002;Chiu et al, 2006;Dickinson, 2002;Hodson and Donner, 2013;Wu et al, 2010 andShu et al, 2002, are 60e125 mg kg À1 . Both Zn and Cu were also within the range tolerated by earthworms in soils (Lukkari et al, 2005).…”

Section: Influence Of Tusb and Tb Treatments On Soil Total Metal Concmentioning

confidence: 95%

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A greenhouse trial to investigate the ameliorative properties of biosolids and plants on physicochemical conditions of iron ore tailings: Implications for an iron ore mine site remediation

Cele

Maboeta

2016

Journal of Environmental Management

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Section: Influence Of Tusb and Tb Treatments On Soil Total Metal Concmentioning

confidence: 95%

“…This is also considered optimum for plant growth (Maiti and Saxena, 1998). According to Meeinkuirt et al (2012), 0.2 dS/m is the standard level of acceptable salinity, while soils with electrical conductivity values greater than 4 dS/m are considered saline (Hodson and Donner, 2013).…”

Section: Soil Parametersmentioning

confidence: 99%

A greenhouse trial to investigate the ameliorative properties of biosolids and plants on physicochemical conditions of iron ore tailings: Implications for an iron ore mine site remediation

Cele

Maboeta

2016

Journal of Environmental Management

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“…Mineral deficiencies occur worldwide (see below), but some elements occur in potentially toxic concentrations that diminish crop yields (Hodson & Donner, ). Potentially toxic elements may be taken up by plants and animals and accumulate in the food chain with detrimental consequences for human health.…”

Section: Soil Food Production and Food Qualitymentioning

confidence: 99%

Soil, food security and human health: a review

Oliver

Gregory

2014

European J Soil Science

257

119

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Direct effects of soil or its constituents on human health are through its ingestion, inhalation or absorption. The soil contains many infectious organisms that may enter the human body through these pathways, but it also provides organisms on which our earliest antibiotics are based. Indirect effects of soil arise from the quantity and quality of food that humans consume. Trace elements can have both beneficial and toxic effects on humans, especially where the range for optimal intake is narrow. We focus on four trace elements (iodine, iron, selenium and zinc) whose deficiencies have substantial effects on human health. As the world's population increases issues of food security become more pressing, as does the need to sustain soil fertility and minimize its degradation. Lack of adequate food and food of poor nutritional quality lead to differing degrees of under-nutrition, which in turn causes ill health. Soil and land are finite resources and agricultural land is under severe competition from other uses. Relationships between soil and health are often difficult to extricate because of the many confounding factors present. Nevertheless, recent scientific understanding of soil processes and factors that affect human health are enabling greater insight into the effects of soil on our health. Multidisciplinary research that includes soil science, agronomy, agricultural sustainability, toxicology, epidemiology and the medical sciences will facilitate the discovery of new antibiotics, a greater understanding of how materials added to soil used for food production affect health and deciphering of the complex relationships between soil and human health.'Upon this handful of soil our survival depends. Husband it and it will grow food, our fuel, and our shelter and surround us with beauty. Abuse it and the soil will collapse and die, taking humanity with it' Vedas Sanskrit Scripture, 1500 BC.

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“…According to Meeinkuirt et al (2012), 0.2 dS m -1 is the standard level of acceptable salinity, while soils with electrical conductivity values [4 dS m -1 are considered saline (Hodson and Donner 2013).…”

Section: Resultsmentioning

confidence: 99%

Response of soil enzyme activities to synergistic effects of biosolids and plants in iron ore mine soils

Cele

Maboeta

2016

Int. J. Environ. Sci. Technol.

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Past mining activities in Swaziland have left a legacy of abandoned mine sites (iron ore, asbestos, diamond and coal mine dumps), all of which have not been reclaimed. These sites were recently (2013) considered by the country's wastewater treatment authorities as suitable places where biosolids can be applied, firstly as a biosolids disposal alternative and, secondly, as a strategy to accelerate mine soil remediation through phytostabilization. In order to understand the effects that this might have on mine soil conditions and microbiota, two (2) plant growth trials were conducted in biosolid-treated iron mine soils and one (1) trial on undisturbed soil, under greenhouse conditions, for twelve (12) weeks. According to the results obtained, the combination of biosolids and plants led to significant improvements (p \ 0.05) in parameters related to soil fertility. Significant increases (p \ 0.05) in alkaline phosphatase, b-glucosidase and urease soil enzyme activities were also observed. Copper and zinc were significantly (p \ 0.05) increased (Cu from 17.00-50.13 mg kg ); however, these sludge-derived metals did not affect enzyme activities. Improvements in soil physicochemical conditions, organic matter-metal complexes, effects of plants on metals and the essentiality of Cu and Zn to soil enzymes were thought to have masked the effects of metals. Increases in soil enzyme activities were considered to be indicative of improvements in the quality, fertility health and self-purification capacity of iron mine soils due to synergistic effects of biosolids and plants.

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Managing adverse soil chemical environments

Cited by 14 publications

References 198 publications

A greenhouse trial to investigate the ameliorative properties of biosolids and plants on physicochemical conditions of iron ore tailings: Implications for an iron ore mine site remediation

A greenhouse trial to investigate the ameliorative properties of biosolids and plants on physicochemical conditions of iron ore tailings: Implications for an iron ore mine site remediation

Soil, food security and human health: a review

Response of soil enzyme activities to synergistic effects of biosolids and plants in iron ore mine soils

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