The effects of hematite nanoparticles on the concentrations of arsenic and some micronutrients of corn plant grown in contaminated soils

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MANSOURI T.; GOLCHIN A.

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Journal: Journal of Water and Soil Conservation Year:2018 | Volume:25 | Issue:1 Page(s): 1-34

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Title

The effects of hematite nanoparticles on the concentrations of arsenic and some micronutrients of corn plant grown in contaminated soils

Author(s)

MANSOURI T. | GOLCHIN A. | Issue Writer Certificate

Keywords

ArsenicQ1

CornQ2

Hematite nanoparticlesQ2

NutrientQ1

Abstract

Background and Objectives: Arsenic is one of the metalloid that recently attracted much attentions because of its chronic effects on human health. Long-term exposure to As can cause skin, bladder, lung and prostate cancers. The presence of As in soil and water leads its transfer to the different parts of plants. So far the effect of Hematite nanoparticles (α-Fe2O3) on the concentration of As in plants grown in contaminated soils has not been evaluated. Therefore this study was conducted to evaluate the effects of Hematite nanoparticles on the concentrations of As, P, Fe, Zn and Mn of Corn plant grown in contaminated soils. Materials and Methods: A factorial experiment was conducted using a completely randomized design and three replications. The experimental factors were Hematite nanoparticles (0, 0. 05, 0. 1 and 0. 2%) and soil As (0, 6, 12, 24, 48 and 96 mg/kg) levels. The soil was artificially contaminated with different levels of As using Na2HAsO4. 7H2O salt and incubated for 5 month. Hematite nanoparticles were synthesized from iron nitrate and their properties were investigated by XRD, SEM and TEM techniques. At the end of incubation time, the Hematite nanoparticles were added to the As contaminated and control soils and after 1 month the concentrations of available As was measured. Then, the Corn plant was used as bioindicator. After 75 days, the plants were harvested and the dry weights as well as concentrations of As, P, Fe, Zn and Mn of aerial parts and roots were measured. Results: The spherical morphology of the Hematite nanoparticles was diagnosed by SEM and TEM images and the mean diameter of the particles were predominantly less than 30 nm. The results showed that the concentration of soil available Arsenic and Arsenic concentrations of root and aerial parts increased as the concentration of soil total Arsenic increased. The accumulation of Arsenic in the root was higher than the Corn aerial parts. Contamination of soil by As increased the concentrations of P and Mn and decreased Fe and Zn in Corn root. The concentrations of P, Fe and Zn in the aerial parts of Corn decreased while Mn increased as a result of As application. As also reduced P translocation from the roots to the aerial parts of Corn plants. The application of Hematite nanoparticles significantly decreased the concentrations of Arsenic in soil and in root and aerial parts of Corn. The application of Hematite nanoparticles increased the dry weight of root by increasing Fe and Zn concentrations in root and decreasing the accumulation of As, P and Mn in the plant root. The nanoparticles utilization also increased the dry weight of aerial parts as a result of increased concentrations of P, Fe and Zn and reduced accumulation of As and Mn. However, in case of uncontaminated soils, nanoparticles decreased the concentrations of P, Fe, Zn, Mn and dry weight of root and aerial parts of plants. The most effective level of application of Hematite nanoparticles was 0. 2% in which the decrease of As concentration in root and arial parts of plant were 54. 64 and 40. 20 percent, respectively for the soils with total As of 96 mg As/kg. Conclusions: As at the concentrations of less than 12 mg/kg increased root and aerial parts growth and dry weights but at the concentrations higher than 12 mg/kg, by producing toxic effects and disrupting the balance of Nutrients, reduced the growth and dry weights of root and aerial parts of Corn plant. Hematite nanoparticles have been effective in reducing the concentration of Arsenic that is absorbed by the soil, which reduces the concentration of Arsenic in the plant and increases its growth. In general, these results suggested that Hematite nanoparticles can be used for remediation of Arsenic contaminated soils, if further research is carried out on their environmental effects.

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APA: Copy

MANSOURI, T., & GOLCHIN, A.. (2018). The effects of hematite nanoparticles on the concentrations of arsenic and some micronutrients of corn plant grown in contaminated soils. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(1 ), 1-34. SID. https://sid.ir/paper/156369/en

Vancouver: Copy

MANSOURI T., GOLCHIN A.. The effects of hematite nanoparticles on the concentrations of arsenic and some micronutrients of corn plant grown in contaminated soils. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2018;25(1 ):1-34. Available from: https://sid.ir/paper/156369/en

IEEE: Copy

T. MANSOURI, and A. GOLCHIN, “The effects of hematite nanoparticles on the concentrations of arsenic and some micronutrients of corn plant grown in contaminated soils,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 1 , pp. 1–34, 2018, [Online]. Available: https://sid.ir/paper/156369/en

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