Document Type : Research Paper
Authors
Department of Range and Watershed Management, Arak Branch, Islamic Azad University, Arak, Iran.
Abstract
A mixture of urban and industrial wastewater is discharged into the Meighan wetland, Arak, Iran. The heavy metals containing wastewater leads to environmental hazards whereby phytoremediation can be used for removing pollutants from contaminated water. An essential native plant that is abundant in the Meighan wetland is Typha Latifolia L. The effect of T. Latifolia L. was investigated on the removal of heavy metals (aluminum, zinc, copper, and nickel) at the inlet of Arak wastewater treatment plant into Meighan wetland. The soil (0-30 cm in depth) and plants (aerial and root biomass) were sampled in September 2019. In the laboratory, heavy metal accumulation in samples was measured via atomic absorption method. The results of analysis of variance (ANOVA) revealed that the concentrations of all four metals were significantly different across the soil, root, and aerial biomass. The results of mean comparison by Duncan's test indicated that the highest concentration of aluminum was in the soil, while the lowest in aerial parts. Copper was maximum in the root, and the minimum was found in the aerial parts. Also, the concentration of zinc was the highest in the root, and the lowest in the soil. And, nickel was maximum in the soil while being minimum in the root. Data showed that the concentrations of aluminum in the soil, root, and aerial biomass of T. Latifolia L. were multiple times higher than permissible limit. The concentration of nickel in the soil was slightly higher than the acceptable limit, but the concentrations of other heavy metals in the soil, in aerial biomass, and in the root of T. Latifolia L. were within the acceptable range. The results indicated T.
Latifolia L. is a suitable plant for the phytoremediation and water treatment in the Meighan wetland.
Keywords
Ebadati F., Esmaeili Sari A., Riahi Bakhtiari A.R., The level and trend of changes in heavy metals as well as aquatic plant organs plus sediments of Miankaleh wetland, Environmental Science 31 (2005) 53-57.
Firouzshahian N., Payandeh K., Sabzalipour S., Monitoring Cd, Ni, and Vd elements in Phragmites australis and Typha Latifolia L. aquatic plants in Hourolazim wetland in Khuzestan province, Development Biology Journal (2019) 47-60.
Ghasemi A., Accumulation of heavy metals in superficial sediments and in Typha Latifolia L. aquatic plant in Anzali international wetland, MSc., Thesis of environmental science, at faculty of environment at Isfahan industrial University; (2013).
Ghanadpour J., and Zndmoqadam A., Accumulation of heavy metals lead, zinc, nickel and cadmiumin (Typhalatifolia) and river sediments Arvand and Bahmanshir in winter season, Journal Wetlands 5 (2010) 29-36 (In Persian).
Haji Hosseini M., Varvani J., Abdi N., Comparing the concentration of heavy metals (Al, Pb, Zn, Ni) in surface sediments of Meighan wetland, 2st National Congress Of Environmental Protection and Planning, Hamedan, Iran (2013).
Jafari Haghighi M., Soil-sampling analysis methods as well as important physiochemical analyses with emphasis on theoretical and applied principles, First Edition, Nedaye Zoha Publications, Iran; (2003).
Karimi H., The encyclopedia of Iran’s Herbage, First Edition, Agricultural science publications, Iran; (2009).
Norouzi Nodeh R., Investigating two species Alyssum longistylum L. and Aegilops columnaris Zhuk as phyto-remediating plants for Arak wastewater, MSc. Thesis, Arak University; (2009).
Salehi A., Phytoremediation: A remediation technology of heavy metal contaminated soils, Human & Environment 17 (2019) 27-42.
Vahid Dastjerdi M., Shanbezadeh S., Zahab Saniei A., Rouzegar R., Investigating and comparing the accumulation of heavy metals in the water, soil, and plants of Gavkhuni international wetland in 2002-2006, Health System Research 6 (2010) 829-836.
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