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Showing 3 results for Environmental Pollution
Investigation of  Heavy Metals Concentrations in the Water Wells Close to Zanjan Zinc and Lead Smelting Plant
M Mohammadian, J Nouri, N Afshari, J Nassiri, M Nourani,
Volume 1, Issue 1 (10-2008)
Abstract

Background and Objectives: Heavy metals processing industry has always been a major cause of concern which affects soils, surface waters, ground waters and river sediments contaminations. Thus, the Zanjan Zinc and Lead Smelting Plant has been considered as a potential source of contamination.
Mterials and Methods: This cross-sectional study has been conducted in February 2008 in the site region .The concentrations of Lead, Zinc and Cadmium have been assessed. The samples have been taken from 17 wells and atomic absorption spectrophotometeric method has been used to assess the samples. In order to find out and locate the exact situation of the wells under study, Global Positioning System instrument has been used. The correlation between the concentration of each metal and the distance of studied well from the plant has been assessed too.
Results: The findings of this study showed that lead and cadmium concentrations were 53% and 59% respectively out of the guideline values of World Health Organization.
Conclusion: The concentration of Zinc was lower than both national and international values in all samples. As the heavy metal concentration is very important for human health status, the other fields of study like heavy metal air pollution effects and related diseases and conditions should be studied and assessed.


Photocatalytic removal of amoxicillin from aqueous solution using magnetic graphene oxide functionalized with cerium dioxide nanocomposite
Nahid Rashtchi, Soheil Sobhanardakani, Mehrdad Cheraghi, Amirreza Goodarzi, Bahareh Lorestani,
Volume 15, Issue 2 (8-2022)
Abstract
Background and Objective: Amoxicillin (AMX) is one of the commonly used commercial antibiotics due to its high resistance to bacteria and its large spectrum against a wide variety of microorganisms, which it´s existence in the wastewater from pharmaceutical industries and hospital effluents causes unpleasant odor, skin disorder, and microbial resistance among pathogen organisms, and it can lead to the death of microorganisms which are effective in wastewater treatment. Therefore, this study was conducted to investigate of removal efficacy of AMX from aqueous solutions using GO@Fe3O4@CeO2.
Materials and Methods: In this descriptive study, GO@Fe3O4@CeO2 was synthesized and then used as a photocatalyst for the removal of AMX from aqueous solution. GO@Fe3O4@CeO2 was characterized using X-Ray Diffraction (XRD), Scanning Electronic Microscopy (SEM), SEM-EDX elemental analysis, Fourier transform infrared spectroscopy (FTIR), and vibrating sample magnetometry (VSM) methods. Additionally, the influence of variables including pH (3-11), amount of photocatalyst (0.006-0.04 g), contact time (0-150 min), and temperature (25-55 °C) was assessed on the efficacy of AMX removal. 
Results: The results indicated that removal efficiency increased up to 90 min contact time, 0.02 g of photocatalyst, and at the temperature of 25 °C. The optimum pH for AMX removal was 10.
Conclusion: GO@Fe3O4@CeO2 could be an effective and available photocatalyst for the removal of AMX from industrial wastewater under UV light.

Investigating the types and amounts of pesticides used in agriculture in the East Azerbaijan province
Mohammad Mosaferi, Jafar Yahyazadeh, Yusef Mohammadian, Farzaneh Moshtaghi,
Volume 17, Issue 2 (9-2024)
Abstract
Background and Objective: The use of pesticides poses serious risks to the health of living organisms. Knowing the type and amount of pesticide use can provide a good information base for managing potential risks from pesticide consumption. This study was carried out with the main objective of determining the types and amounts of pesticides used on agricultural land in East Azarbaijan Province in 2021.
Materials and Methods: Information about the pesticides have been gathered and analyzed by referring to the Agricultural Jihad Organization and other relevant authorities. Calculations related to the amount of pesticides used per unit area were made using the total area of agricultural lands in the province.
Results: Considering the frequency, 403 kinds of pesticides are used in the following order: Herbicides > Insecticides > Fungicides > Acaricides > Others > Disinfectants. Consdidering total consumption of 2873730 kg pesticides, the order based on the amount is: Insecticides > Herbicide > Fungicides > Miscellaneous > Acaricides and Disinfectants based on the amount. The total ratio of pesticides used to pesticides distributed through the official (government) channel is 2.51. The minimum, maximum, and mean consumption values in counties are 0.4, 21.4, and 4.21 ± 5.33 kg/ha, respectively, and for province is 2.38 kg/ha. There is a correlation between the amount of pesticide applied and the number of farmers and traders.
Conclusion: The consumption of pesticides in the province is higher than the world average. Appropriate management of pesticides is required from the viewpoints of environment and health protection.
 

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