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Heavy Metals and Polycyclic Aromatic Hydrocarbons in Sludge From Three Industrial Wastewater Treatment Plants of the Industrial Parks of Isfahan Province Publisher



Mardan S1 ; Ebrahimi A2, 3 ; Amin MM4 ; Momeni SA5 ; Ghodousi H5 ; Adineh MA6
Authors
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Authors Affiliations
  1. 1. Department of Environmental Engineering, Small Industries and Industrial Parks Organization, Tehran, Iran
  2. 2. Department of Environmental Health Engineering, Student Research Center, School of Health, Isfahan University of Medical Sciences (IUMS), Isfahan, Iran
  3. 3. Environmental Sciences and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
  4. 4. Environment Research Center, Research Institute for Primordial Prevention of Noncommunicable Disease, IUMS, Department of Environmental Health Engineering, School of Health, IUMS, Isfahan, Iran
  5. 5. Department of Environmental Engineering, Isfahan Province Industrial Estates Company, Isfahan, Iran
  6. 6. Department of Water and Wastewater Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran

Source: International Journal of Environmental Health Engineering Published:2015


Abstract

Aims: In this study, the characterization of heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) were investigated in three different industrial sewage sludges in industrial parks of Isfahan province, Isfahan, Iran. Materials and Methods: Sludge samples were collected from three dry bed wastewater treatment plants (WWTPs) within the province during of four seasons of 2011-2012. Gas chromatography-mass spectrometry and inductively coupled plasma were used to measure PAHs and HMs contents in sludge. Results: The average concentrations of Cd, Cr, Cu, Mo, Ni, Pb, As, Hg, and Se in sewage sludge were 305.67, 514, 1019, 6.46, 102.33, 1181.33, 277.33, 226.83, and 6.35 mg/kg dry weight (d.w.), respectively. The concentrations of HMs in most of the sludge samples were above the regulatory limits for the sludge class 1 and 2 to be used in agriculture in Iran. The levels of Σ8 PAHs varied from 92.33 µg/ the to 257.87 µg/kg d.w. in the sludge, that lower than the limitation value (6 mg/kg) recommended by the Europe Union and US Environmental Protection Agency for land application. Phenanthrene, pyrene, and fluorene were predominant isomers of PAH in sludge samples. The highest value was found in the Morchekhort WWTP. Conclusion: The concentration and composition of PAHs and HMs in sewage sludge varied and depended mainly on the quantity and type of industrial wastewater accepted by the WWTPs. There is a pyrene in sewage samples that is a carcinogenic. The concentration of HMs in sewage sludge was above of standard levels. Finally, we are not recommended the using of industrial sewage sludge in agriculture because of the high value of HMs was found in samples. © 2015 International Journal of Environmental Health Engineering. All rights reserved.
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