Effect of Season, Phosphate, and Acidity on Plant Growth in Arsenic-Toxic Soils

Benson, N. R.

doi:10.1097/00010694-195309000-00006

Cited by 36 publications

(16 citation statements)

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“…This may in tum affect the amount of arsenic in the river water. Benson (1953) showed that increasing levels of phosphorus decreases the toxicity of arsenic to barley plants by possibly competing for the binding sites that would otherwise have been occupied by this phytotoxic element. It is normal farming practice to apply 400 kg ha-1 phosphate fertiliser to pumice soils (Hill, 1975) and some of the phosphorus leaches into the waterways of the area.…”

Section: Arsenic In the Sediments Of The Waikato Rivermentioning

confidence: 99%

The distribution and fate of arsenic in the Waikato River system, North Island, New Zealand

Robinson

Outred

Brooks

et al. 1995

Chemical Speciation & Bioavailability

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Arsenic levels were determined in waters, sediments, aquatic macrophytes and other organisms taken from the Waikato River system, North Island, New Zealand. All water samples contained elevated levels of arsenic relative to 0.0017 1-Lg g-1 , the background level for arsenic in aquatic systems. Most water samples taken between Lakes Aratiatia and Whakamaru had arsenic levels above the World Health Organization (WHO) limit for arsenic in drinking water (0.01 1-Lg ml -1). Arsenic levels in the water of the river decreased downstream from the Wairakei and Ohaaki geothermal power stations, indicating that these are major sources of arsenic to the river. The arsenic concentration of the sediments was typically around 30 1-Lg g-1 , though there was a large variation. Sediments appear to be a sink for arsenic. Some aquatic macrophytes ( Ceratophyllum demersum and Egeria densa) had arsenic concentrations up to 1 ,000 1-Lg g-1 , (0.1 %) in dried tissue. These plants may be used as bioindicators of arsenic pollution in aquatic systems. Water cress taken near Broadlands (Ohaaki) contained around 300 1-Lg g-1, (dry weight) arsenic, and should not be consumed. Shellfish taken from the mouth of the Waikato river had significantly higher arsenic concentrations than the same species taken further down the coast at Raglan.

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Section: Arsenic In the Sediments Of The Waikato Rivermentioning

confidence: 99%

The distribution and fate of arsenic in the Waikato River system, North Island, New Zealand

Robinson

Outred

Brooks

et al. 1995

Chemical Speciation & Bioavailability

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show abstract

“…The phosphate uptake system is extremely efficient, producing a greater difference in concentration between soil and cell than for any other mineral (Bieleski and Ferguson, 1983). Because of the chemical similarity of this ion to phosphate, arsenic treatment with phosphate has been shown to alleviate the toxic effects of arsenate in normal plants (Benson, 1953). Under some circumstances, however, phosphate can actually stimulate arsenate uptake by plants by increasing its bioavailability (Peryea, 1998).…”

Section: Arsenic Uptakementioning

confidence: 99%

Pteridology in the New Millennium

Chandra¹,

Srivastava²

2003

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“…Among other factors that may affect the availability of arsenic are soil pH and iron and phosphate content of soil (Benson, 1953). Metal chelators and other amendments, which release metal to plant roots and facilitate metal uptake and translocation in plant shoot, can improve phytoextraction.…”

Section: Exhibit 6 Arsenic Uptake By Asparagus Fern After Four Weeksmentioning

confidence: 99%

Phytoremediation of arsenic‐contaminated soil as affected by the chelating agent CDTA and different levels of soil pH

Bagga

Peterson

2001

Remediation Journal

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Elevated levels of arsenic can pose a major threat to both human health and the environment. The phytoremediation of heavy metals from soil is emerging as a cost‐effective technology for the remediation of contaminated soils. The present greenhouse study was undertaken to identify plants capable of tolerating and accumulating high concentrations of arsenic. Asparagus fern and rye grass were found to tolerate and accumulate more than 1,100 ppm of arsenic in plant tissue. Arsenic uptake as affected by different levels of the chelating agent trans‐1, 2‐ cyclohexylenedinitrilotetraacetic acid (CDTA) and soil pH were also studied. The application of 5 mmol kg−1 of CDTA to arsenic‐contaminated medium loam field soil enhanced the accumulation of arsenic by the test plants. Under these conditions, plants accumulated up to 1,400 ppm of arsenic as compared to 950 ppm by the plants grown in soil containing 1,200 ppm of arsenic but without any amendment of the chelating agent. Plants grown in field soil of pH 5 containing 300 ppm of arsenic absorbed higher concentrations of arsenic than at other tested pH levels. Corresponding reductions in arsenic content of soil after plant harvests were observed. © 2001 John Wiley & Sons, Inc.

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Effect of Season, Phosphate, and Acidity on Plant Growth in Arsenic-Toxic Soils

Cited by 36 publications

References 0 publications

The distribution and fate of arsenic in the Waikato River system, North Island, New Zealand

The distribution and fate of arsenic in the Waikato River system, North Island, New Zealand

Pteridology in the New Millennium

Phytoremediation of arsenic‐contaminated soil as affected by the chelating agent CDTA and different levels of soil pH

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