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Showing 3 results for Bakhtiyari
Evaluation of copper, zinc, and chromium concentration in landfill soil and hospital waste ash of Shahrekord municipal solid waste landfill
M Hatami Manesh, M Mirzaei, M Gholamali Fard, A.r Riyahi Bakhtiyari, M Sadeghi,
Volume 8, Issue 1 (8-2015)
Abstract

Background and Objectives: one of the most important environmental concerns is heavy metals emissions from human activities to natural ecosystems, particularly transfer to soil. The aims of this study were measured the concentrations of Cu, Zn and Cr in landfill soil and hospital waste ash of Shahrekord municipal solid waste landfill. Materials and Methods: Soil samples were collected from three sites: out of the landfill, municipal landfill and hospital landfill. In each site 2, 1, and 1 stations ware selected respectively and each sample was replicated in three times. Results: We found that there was a significant difference between concentrations of Cu, Zn and Cr in the landfills soil (95% confidence, P <0.05). Furthermore, the highest levels of Zn and Cu were detected in the hospital landfill and also for Cr in the municipal landfills. However, the concentration levels of heavy metals in all of the sites were in order as follows: Zn>Cu>Cr. Conclusion: High concentrations of metals determined in the present study represents the high application of these metals in the structure of municipal and hospital solid wastes and also their inaccurate separation. Thus, awareness about physical and chemical characteristics of municipal and hospital wastes and also the landfill soil is necessary for evaluating their effects on the soil quality and surrounding environments.


Investigating the amounts and risk assessment of lead in raw milk collected from farms in Tehran province in winter, 2022
Alireza Bakhtiyari, Behrouz Akbari-Adergani, Parisa Shavli-Gilani, Liela Karami, Najmeh Yazdanfar, Parisa Sadighara,
Volume 17, Issue 1 (6-2024)
Abstract
Background and Objective: Given the crucial role of milk and its products in human diets, it is imperative to implement effective measures to ensure the safety of milk by minimizing the presence of hazardous pollutants. This study aims to assess the concentration and potential risks associated with lead in raw milk produced in Tehran province.
Materials and Methods: This cross-sectional descriptive study involved the collection of raw milk samples from 24 diverse livestock farms in Tehran province during the winter season of 1401. The samples were analyzed for lead contamination using flame atomic absorption spectrometry. Statistical tests were applied to compare the results with international standards, and subsequent risk assessment was conducted based on the average amounts.
Results: The study revealed that none of the samples exceeded the permissible limit for lead. The mean and standard deviation of lead concentration in the samples was 7 ± 5.8 (ppb), well below the international standard. There was no significant variation in lead levels among the tested livestock farms. The Hazard Quotient (HQ) values for both children and adults were calculated to be less than 1.
Conclusion: The concentration of lead in all samples remained below the permissible limits set by Codex and the Iran Standards Organization, indicating no non-carcinogenic risks associated with milk consumption in terms of lead contamination, as suggested by the calculated HQ values.
 

Investigating the concentration of Patulin in various juices samples sold in Tehran market in 2024
Soheyl Eskandari, Alireza Bakhtiyari, Ali Mirzakhani, Saeed Aghebat-Bekheir, Parisa Shavali-Gilani,
Volume 18, Issue 4 (3-2026)
Abstract
Background and Objective: Patulin is one of the most important mycotoxins produced by a wide range of molds. The main source of this mycotoxin is rotten fruits, especially apple juice. Patulin may damage the liver, spleen, and kidneys and cause seizures, edema, intestinal inflammation, and vomiting. Patulin may also have genotoxic and neurotoxic properties and disrupt the functioning of the immune and nervous systems.
Materials and Methods: In this study, the concentration of patulin in 34 random samples of fruit juice, including 26 apple juice samples, 4 apple and banana mixed juice samples, 2 apple and kiwi mixed juice samples, and 2 pomegranate juice samples sold in stores in Tehran in May 2024, was measured and reported using the HPLC-UV method.
Results: The LOD and LOQ levels were 1.21 and 3.49 µg/kg, respectively, and the recovery percentage was between 91 and 97 percent. The mean and standard deviation of patulin concentration in a total of 34 samples was 13.425 ± 21.348 µg/kg, which was below the permissible limit of the Iranian standard and Codex (50 µg/kg), and only the findings related to one of the samples were higher than the standard limit (14.88 µg/kg).
Conclusion: The results of this study show that the levels of patulin in the samples examined are mostly within the limits of Iranian and Codex standards. However, more comprehensive studies with a larger number of samples are recommended for a more accurate assessment of potential risks.
 

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