Ava Heidari; Zahra Jafarpour Chek Ab; Mohamad Farzam; Abbas Rouhani
Abstract
Background and Purpose: Consumption of vegetables contaminated with heavy metals is dangerous for human health. The present research determined some heavy metals in Portulaca oleracea and assessed its health risk.Materials and Methods: P. oleracea was grown in pots using soil polluted with nickel and ...
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Background and Purpose: Consumption of vegetables contaminated with heavy metals is dangerous for human health. The present research determined some heavy metals in Portulaca oleracea and assessed its health risk.Materials and Methods: P. oleracea was grown in pots using soil polluted with nickel and various amounts of iron nanoparticles (0, 15, and 30 mg/kg). The concentration of heavy metals was determined by ICP-OEC after the samples were extracted. The bioaccumulation and transfer factors in plants, daily intake, and risk indicators of heavy metals for humans were all calculated.Results: The treatment with 30 mg/kg of iron nanoparticles resulted in the maximum concentration of nickel and iron in the roots and aerial sections of P. oleracea. The nickel and iron TF were below one for the soil-root but above one for the root-stem. For nickel and iron, the BAF in the plant was discovered to be less than one. Human consumption of P. oleracea poses minimal dangers, as indicated by HRI values that are less than 1. Compared to iron, nickel showed higher HRI values. Across all treatments, children demonstrated high HRIs for nickel and iron than adults.Conclusion: There are no non-cancerous diseases for consumers, according to the hazard ratio of the investigated components in the P. oleracea, which was 1. Overall, the findings demonstrated that the HRI of heavy elements for both analyzed age groups was less than one.
Mersedeh Sadat Hozhabralsadat; Ava Heidari; Zahra Karimian; Mohammad Farzam
Abstract
Abstract Background and Aim: Today, air pollution, with an impact on a global scale, is an important concern of the modern world. It has many adverse effects on human health and the environment. Therefore, it is necessary to find sustainable and environment-friendly solutions that prevent the increase ...
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Abstract Background and Aim: Today, air pollution, with an impact on a global scale, is an important concern of the modern world. It has many adverse effects on human health and the environment. Therefore, it is necessary to find sustainable and environment-friendly solutions that prevent the increase of pollution levels and help eliminate them. One of the newest ways to reduce air pollution and absorb particulate matter, as well as improve air quality, is to use green walls in urban spaces. The present study investigated the potential of green walls in reducing air pollutants. Materials and methodology: In this research, two green walls were installed at the Khayyam intersection in Mashhad for three months. Finally, the Air Pollution Tolerance Index was determined for all the plants by measuring chlorophyll, ascorbic acid, leaf-related water content, and pH. Results All of the plant species planted on the walls were classified as intermediate in the tolerance. Among all the plants, Carpobrotus edulis and Rosmarinus officinalis had higher APTI, which makes them more resistant and suitable for planting in polluted areas. Considering the statistical analysis, the APTI of the plants was correlated with ascorbic acid and leaf-related water content. Conclusion: Our findings suggest the suitability of the above-mentioned plants for plantation in areas with high levels of pollutants.