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Accumulation of heavy metals in agricultural soil irrigated by sewage sludge and industrial effluent (case study: Agh ghallah industrial estate)

Zafarzadeh, A. and Mehdinejad, M. and Amanidaz, N. (2015) Accumulation of heavy metals in agricultural soil irrigated by sewage sludge and industrial effluent (case study: Agh ghallah industrial estate). Journal of Mazandaran University of Medical Sciences, 25 (121). pp. 217-226.

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Background and purpose: Industrial effluent and sewage sludge are used as fertilizer since they contain high levels of nutrient. The main pollutant in industrial effluent is heavy metals. In this study an assessment was made on the impact of industrial wastewater effluent and sewage sludge on accumulation of heavy metals in agricultural soil at Agh ghallah industrial Estate. Materials and methods: In a descriptive-analytic study, 72 samples (sewage sludge, effluent and soil) were collected from the Industrial state. All sampling and tests were performed according to standard methods and concentration of heavy metals was determined using polarography method. To analyze the data, SPSS was used and 95 confidence intervals (P<0.05) were applied. Results: The mean concentrations of Cd, Cu. Pb and Zn in sewage sludge were 0.53, 15.9, 1.44 and 692.7 mg/kg dw, respectively which were found to be lower than EPA standard. The concentrations of investigated heavy metals were within normal range in wastewater effluent that was discharged into surface water. The mean concentrations of metals in soil irrigated by wastewater were higher than those of the control soil. In a 10-year period, the concentration of lead and zinc increased 130 and 4 fold and cadmium and copper concentrations increased less than two-fold. There was a significant correlation between Zn and Pb in soil, sewage sludge and control soil (P<0.05). However, the concentration of Cd and Cu were not affected (P> 0.05). Conclusion: The concentrations of heavy metal were found lower than the maximum allowable level. Therefore, in this area, wastewater and sewage sludge could be used to irrigate agricultural lands and greenspaces in shortage of water, however, environmental regulations should be taken into account. © 2015 Mazandaran University of Medical Sciences. All rights reserved.

Item Type: Article
Additional Information: cited By 1
Uncontrolled Keywords: cadmium; copper; heavy metal; industrial effluent; lead; zinc, Article; controlled study; descriptive research; environmental exposure; irrigation (agriculture); polarography; sampling; sludge; waste water
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 10 Sep 2016 05:19
Last Modified: 24 Dec 2016 08:18
URI: http://eprints.goums.ac.ir/id/eprint/4709

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