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Selecting Appropriate Forms of Nitrogen Fertilizer to Enhance Soil Arsenic Removal byPteris Vittata: A New Approach in Phytoremediation
- Source :
- International Journal of Phytoremediation. 9:269-280
- Publication Year :
- 2007
- Publisher :
- Informa UK Limited, 2007.
-
Abstract
- Certain plant species have been shown to vigorously accumulate some metals from soil, and thus represent promising and effective remediation alternatives. In order to select the optimum forms of nitrogen (N) fertilizers for the arsenic (As) hyperaccumulator, Pteris vittata L., to maximize As extraction, five forms of N were added individually to different treatments to study the effect of N forms on As uptake of the plants under soil culture in a greenhouse. Although shoot As concentration tended to decrease and As translocation from root to shoot was inhibited, overall As accumulation was greater due to higher biomass when N fertilizer was added. Arsenic accumulation in plants with N fertilization was 100-300% more than in the plants without N fertilization. There were obvious differences in plant biomass and As accumulation among the N forms, i.e., NH4HCO3, (NH4)2S04, Ca(NO3)2, KNO3, urea. The total As accumulation in the plants grown in As-supplied soil, under different forms of N fertilizer, decreased as NH4HCO3(NH4)2S04ureaCa(NO3)2KNO3CK. The plants treated with N and As accumulated up to 5.3-7.97 mg As/pot and removed 3.7-5.5% As from the soils, compared to approximately 2.3% of As removal in the control. NH4+ -N was apparently more effective than other N fertilizers in stimulating As removal when soil was supplied with As at initiation. No significant differences in available As were found among different forms of N fertilizer after phytoremediation. It is concluded that NH4+ -N was the preferable fertilizer for P. vittata to maximize As removal.
- Subjects :
- Nitrogen
Environmental remediation
Biomass
Plant Science
Arsenic
Nutrient
Metals, Heavy
Humans
Soil Pollutants
Environmental Chemistry
Hyperaccumulator
Fertilizers
Rhizosphere
biology
Chemistry
fungi
food and beverages
Phosphorus
Pteris
biology.organism_classification
Pollution
Phytoremediation
Biodegradation, Environmental
Agronomy
Shoot
Pteris vittata
Subjects
Details
- ISSN :
- 15497879 and 15226514
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- International Journal of Phytoremediation
- Accession number :
- edsair.doi.dedup.....ddbff0bebae22885ba5bd7ac49dfc616