Optimum P levels for arsenic removal from contaminated groundwater by Pteris vittata L. of different ages

Santos, Jorge Antônio Gonzaga; Gonzaga, Maria Isidória Silva; Lena, Q.

doi:10.1016/j.jhazmat.2010.04.087

Cited by 17 publications

(6 citation statements)

References 19 publications

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“…However, the low initial growth of A. mangium and M. caesalpiniaefolia observed in this study indicates that these species might not be efficient for this purpose. On the other hand, some well-known agronomic practices, such as phosphate fertilization or inoculation with mycorrhizal fungi, improve plant growth in Ascontaminated sites (Madeira et al, 2010;Santos et al, 2010;Cozzolino et al, 2010). Further studies should test these practices for M. caesalpiniaefolia and A. mangium.…”

Section: Resultsmentioning

confidence: 99%

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Cipriani

Dias²,

Costa³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYAcacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)-contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caesalpiniaefolia were grown for 120 d in an Oxisol-sand mixture with 0, 50, 100, 200, and 400 mg kg -1 As, in four replications in four randomized blocks. The plants were assessed for visible toxicity symptoms, dry matter production, shoot/root ratio, root anatomy and As uptake. Analyses of variance and regression showed that the growth of A. mangium and M. caesalpiniaefolia was severely hindered by As, with a reduction in dry matter production of more than 80 % at the highest As rate. The root/shoot ratio increased with increasing As rates. At a rate of 400 mg kg -1 As, whitish chlorosis appeared on Mimosa caesalpiniaefolia seedlings. The root anatomy of both species was altered, resulting in cell collapse, death of root buds and accumulation of phenolic compounds. Arsenic concentration was several times greater in roots than in shoots, with more than 150 and 350 mg kg -1 in M. caesalpiniaefolia and A. mangium roots, respectively. These species could be suitable for phytostabilization of As-contaminated sites, but growth-stimulating measures should be used.Index terms: arsenate, heavy metals, phytoremediation, root anatomy, soil contamination.(

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Section: Resultsmentioning

confidence: 99%

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Cipriani

Dias²,

Costa³

et al. 2013

Rev. Bras. Ciênc. Solo

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“…Though the level of arsenic reduction was not substantial, some arsenic was lost in the control tank. In a hydroponic study, we examined optimum P levels on arsenic removal from groundwater by P. vittata [24]. With no P being supplied, 100% arsenic removal is accounted by plant removal.…”

Section: Resultsmentioning

confidence: 99%

Phytoremediation of arsenic-contaminated groundwater using arsenic hyperaccumulator Pteris vittata L.: Effects of frond harvesting regimes and arsenic levels in refill water

Natarajan

Stamps

Lena

et al. 2011

Journal of Hazardous Materials

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“…During P starvation, many plants respond by increasing root length and density, and by exuding organic compounds to mobilize insoluble P in soils , Not only does PV tolerate low P availability, the presence of As has been shown to improve its biomass . These properties make PV unique in its ability to scavenge for P, especially in the presence of As.…”

Section: Introductionmentioning

confidence: 99%

“…7,16 Not only does PV tolerate low P availability, the presence of As has been shown to improve its biomass. 17 These properties make PV unique in its ability to scavenge for P, especially in the presence of As.…”

Section: ■ Introductionmentioning

confidence: 99%

Sparingly-Soluble Phosphate Rock Induced Significant Plant Growth and Arsenic Uptake by Pteris vittata from Three Contaminated Soils

Lessl

Lena

2013

Environ. Sci. Technol.

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We evaluated the ability of As-hyperaccumulator Pteris vittata (PV) to remove As from As-contaminated soils over five harvests in 2.5 years in raised beds (162 kg soil/bed). We tested the hypothesis that a P-limiting environment would enhance PV growth and As uptake owing its unique ability to uptake P under As-rich environment. In Dec. 2009, PV was transplanted to three As-contaminated soils (pH of 5.5-7.2) containing 25-129 mg kg(-1) As, which was amended with sparingly-soluble phosphate rock (PR-soil) or soluble P fertilizer (P-soil). During the 2.5-year, PV obtained sufficient P (1882 vs 2225 mg kg(-1)) from PR-soils, with increased root biomass (33%) and root exudation (53%) compared to P-soils. In addition, its frond biomass increased by 20% consecutively with each harvest (six month interval) from 18 to 36 g plant(-1). Its frond biomass in PR-soils (52.2 g plant(-1) year(-1) or ∼12 mt ha(-1) year(-1)) averaged 39% more than that in P-soils. To our knowledge, this represented the largest PV frond biomass reported, demonstrating the unique ability of PV in using insoluble P from PR in alkaline soils. In addition to biomass increase, PV from PR-soils had ∼1.5 times more As in fronds (2540, 780, and 920 mg kg(-1)) than those from P-soils (1740, 570, and 400 mg kg(-1)), with soils containing 129, 25, and 30 mg kg(-1) As, respectively. The low available P in PR-soils induced substantial plant growth and As uptake by PV. This translated into significantly more As removal from soil, averaging 48% reduction in PR-soils and 36% in P-soils in 2.5 years. With multiple harvests and PR amendments, our results showed As removal by PV from contaminated soils was ∼7 times faster than published studies.

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Optimum P levels for arsenic removal from contaminated groundwater by Pteris vittata L. of different ages

Cited by 17 publications

References 19 publications

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Phytoremediation of arsenic-contaminated groundwater using arsenic hyperaccumulator Pteris vittata L.: Effects of frond harvesting regimes and arsenic levels in refill water

Sparingly-Soluble Phosphate Rock Induced Significant Plant Growth and Arsenic Uptake by Pteris vittata from Three Contaminated Soils

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