Amir Hossein Baghaie; Raheleh Mirzaee
Abstract
Introduction: In order to optimize the use of industrial wastewater, proper management practices should be applied for wastewater treatment. Thus, this study was done to evaluate the effect of iron slag enriched cow manure, zeolite and pumice on the sunflower Pb concentration in a soil irrigated with ...
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Introduction: In order to optimize the use of industrial wastewater, proper management practices should be applied for wastewater treatment. Thus, this study was done to evaluate the effect of iron slag enriched cow manure, zeolite and pumice on the sunflower Pb concentration in a soil irrigated with wastewater of battery factory. Methods: In this descriptive study, treatments consisted of applying iron slag (0, 1 and 2 % (W/W)) enriched cow manure at the rates of 0 and 30 t/ha, using zeolite (0 and 2 % (W/W)) and pumice (0 and 8 % (W/W), and sunflower irrigation with the wastewater of battery factory mixed with well water with the ratio of 1:1 and 1:2 (water/wastewater). After 60 days, the plant was harvested and the concentration of Pb and Fe was measured using atomic absorption spectroscopy. The SOD enzyme activity was also determined. Results: Application of 2% zeolite and 8% (W/W) pumice significantly decreased the Pb concentration of the soil irrigated with the wastewater at the ratio of 2:1 (wastewater/water) by 8.1%, respectively. The plant Pb concentration was also increased by 11.2 and 13.3%, respectively. The SOD enzyme activity showed a similar trend with the plant Pb concentration. Enrichment of cow manure with iron slag significantly decreased the Pb concentration of the plant that was irrigated with the wastewater at the ratio of 2:1 (wastewater/water) by 11.3% Conclusion: Iron slag enriched cow manure, pumice and zeolite significantly decreased the soil and plant Pb concentration of the soil and plant that was irrigated with wastewater.
Kourosh Mokhtari; Hossein Mazaheri; Amir Hossein Baghaie; Ali Hassani Joshaghani
Abstract
Background: High concentration of heavy metals and NO 3 in vegetables may pose serious health risks to humans. Therefore, this research was done to evaluate the carcinogenic and non- carcinogenic risk of heavy metals and NO 3 due to the consumption of most important greenhouse vegetables produced in ...
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Background: High concentration of heavy metals and NO 3 in vegetables may pose serious health risks to humans. Therefore, this research was done to evaluate the carcinogenic and non- carcinogenic risk of heavy metals and NO 3 due to the consumption of most important greenhouse vegetables produced in Markazi province. Methods: In this descriptive study, sampling of cucumber, tomato, and bell pepper produced in the greenhouses of Markazi province was done randomly and the concentration of Pb, Cd, Cu, Ni and NO 3 of them were determined. Non-cancer risk related to heavy metals and NO 3 sorption from vegetables was evaluated using the EPA method for men and women. Results: The mean concentration of all the studied metals except Cu was in the allowable concentration range. The mean concentration of NO 3 in the cucumber was 300 mg/kg FW, which was about 1.5 times higher than the maximum allowable concentration of that in vegetables. The HQ of Pb, Cd, Ni, Cu and NO 3 for all population groups were smaller than 1. The results showed that NO 3 and Pb were the major risk contributor for the consumers. The excess lifetime cancer risks of Ni for all receptor groups were greater than 1×10 −6 . Conclusion: The results of this study showed that the total risk index of heavy metals and NO 3 through consumption of greenhouse vegetables grown in Markazi province was below one. Also, in the most age groups this index is greater for women related to the men.
Amir Hossein Baghaie; Mohammad Fereydoni
Abstract
Background: This descriptive study was conducted to evaluate the interaction effects of sewage sludge and its biochar on anthracene biological degradation in a Pb polluted soil under sunflower cultivation Methods: Treatments consisted of applying three rates of anthracene (0, 12.5 ...
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Background: This descriptive study was conducted to evaluate the interaction effects of sewage sludge and its biochar on anthracene biological degradation in a Pb polluted soil under sunflower cultivation Methods: Treatments consisted of applying three rates of anthracene (0, 12.5 and 25 mg/kg soil), two levels of sewage sludge and its biochar (0 and 30 t/ha) in the presence of Azetobacter bacteria and Piriformospora indica (P. indica) fungus. After 60 days, plants were harvested and plant Pb concentration was measured using atomic absorption spectroscopy. In addition, the soil petroleum hydrocarbons concentration and soil microbial respiration were measured by the method described by Besalatpour et al. (2011). The catalyze enzyme activity was assayed. Results: Plant inoculation with P.indica and Azotobacter significantly increased the degradation of anthracene in soil by 12.8% in the soil treated with 25 mg anthracene/kg soil. In addition, the soil Pb availability was decreased by 14.6% in the mentioned treatment. Applying 30 t/ha sewage sludge and its biochar significantly increased the plant biomass and anthracene degradation in the soil treated by 12.5 mg anthracene /kg soil by 13.5% and 12.6%, respectively. Conclusion: Soil treated with sewage sludge and its biochar had a positive effect on plant resistance to abiotic stresses and degradation of anthracene in the soil. Among this, plant inoculation with P. indica and Azotobacter had also an additive effect on bio-remediation of anthracene in the soil that is a positive point in environmental studies. However, soil pollution with heavy metals had an adverse effect on it.
