Analytical Methods in Environmental Chemistry Journal
AMECJ

Measurement of heavy metals in soil, plants and water samples based on MWCNTs modified with Bis(triethoxysilylpropyl)tetrasulfide by flame atomic absorption spectrophotometry

Document Type : Original Article

Authors

Mohammad Reza Rezaei Kahkha 1
Ahmad Salarifar 2
Batool Rezaei Kahkha 1

1 Department of Health Engineering, Zabol University of Medical Sciences, Zabol, Iran

2 Environmental Engineering Department, Faculty of Natural Resources, Islamic Azad University, Bandar Abbas Branch, Iran

https://doi.org/10.24200/amecj.v5.i01.167
Abstract
Heavy metals (HMs) are considered as the major environmental pollutants that accumulated in soil and plant. Consumption of such contaminated plants by humans and animals would ultimately harm the health of communities. This study aims to evaluate the amount of copper(Co), cadmium(Cd), and lead(Pb) in soil and cultivated plants that are irrigated by the city of Zabol’s wastewater. Also, the heavy metals determined in 20 mL of Zabol’s water based on Bis(triethoxysilylpropyl)tetrasulfide (S4[C3H6Si(OEt)3]2, TEOSiP-TS) modified on MWCNTs as an adsorbent by the uniform dispersive -micro-solid phase extraction (UD-µ-SPE) at optimized pH. In this study, 52 samples including wheat, corn grain, and wild spinach, as well as agricultural soil were selected randomly from three village stations. The concentrations of heavy metals in plants, soils, and water samples were measured using a flame atomic absorption spectrometer (F-AAS).  By optimizing parameters, the linear range (LR) and the detection limit (LOD) of Cu, Cd, and Pb were obtained 1.5-1000 μg L-1, 1-200 μg L-1, 5-1500 μg L-1 and 0.5 μg L-1, 0.25 μg L-1, 1.5 μg L-1, respectively in water samples (RSD%<2). This study indicates that irrigation of agricultural fields using wastewater causes the accumulation of heavy metals in soil and plants.

Graphical Abstract

Measurement of heavy metals in soil, plants and water samples based on MWCNTs modified with Bis(triethoxysilylpropyl)tetrasulfide by flame atomic absorption spectrophotometry

Keywords

Heavy Metals
Environment sample
Bis(triethoxysilylpropyl)tetrasulfide
Uniform dispersive -micro-solid phase extraction
Flame atomic absorption spectrophotometer
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Analytical Methods in Environmental Chemistry Journal
Volume 5, Issue 1
Winter 2022
Pages 49-60