Magntic susceptibility as a proxy to heavy metal content in the sediments of Anzali wetland, Iran
Tóm tắt
Heavy metal concentrations and magnetic susceptibility of sediment samples were analyzed as indicators of urban and industrial contamination in Anzali wetland in Gilan, Iran. The aim was to investigate the suitability of magnetic properties measurements for indicating heavy metal pollution. The concentration of six heavy metals (Ni, Cr, Cd, Zn, Fe, and Pb) was determined in different depths of four sediment core samples within four different regions of the wetland (Abkenar, Hendekhaleh, Shijan and Siakeshim). Average concentration of heavy metals in the sediment cores was higher than the severe effect level (SEL) for Ni, Cr and Fe (77.26, 113.63 ppm and 5.2%, respectively) and lower than SEL for Cd, Zn and Pb (0.84, 137.7, 29.77 ppm, respectively). It was found that the trend of metal concentrations with the depth is different in each core and is related to the pollution discharges into the rivers entering the wetland. Core magnetic susceptibility measurements also showed different magnetic properties in each core. Cluster analysis was applied using Pearson correlation coefficient between heavy metal concentrations and magnetic properties across each core. Significant relationship was found to exist between magnetic susceptibility and the concentration of Ni in Abkenar and the concentration of Fe in other regions. Whereas Abkenar is almost the isolated and uncontaminated region of the wetland, it revealed a difference in magnetic properties between contaminated and uncontaminated sediments. It was concluded that magnetic properties of samples from contaminated zone were mostly related to Fe content. The result of this study demonstrated that magnetic susceptibility measurements could be applied as a proxy method for heavy metal pollution determination in marine environments in Iran especially as a rapid and cost-effective introductory site assessments.
Tài liệu tham khảo
Alagarasmi A: Environmental magnetism and application in the continental shelf sediments of India. Mar Environ Res. 2009, 68: 49-58. 10.1016/j.marenvres.2009.04.003.
Chan LS, NG LS, Davis AM, Yim WWS, Yeung CH: Magnetic properties and heavy metal contents of contaminated seabed sediments of Penny's bay, Hong Kong. Mar Pollut Bull. 2001, 42 (7): 569-583. 10.1016/S0025-326X(00)00203-4.
Dearing JA, Hay KL, Baban SMJ, Huddleston AS, Wellington EMH, Loveland PJ: Magnetic susceptibility of soil: an evaluation of conflicting theories using a national data set. Geophys J Int. 1996, 127: 728-734. 10.1111/j.1365-246X.1996.tb04051.x.
Hoffmann V, Knab M, Appel E: Magnetic susceptibility mapping of roadside pollution. J Geochem Explor. 1999, 66: 313-326. 10.1016/S0375-6742(99)00014-X.
Karimi R, Ayoubi S, Jalalian A, Sheikh-Hosseini AR, Afyuni M: Relationships between magnetic susceptibility and heavy metals in urban topsoils in the arid region of Isfahan, central Iran. J Appl Geophysics. 2011, 74: 1-7. 10.1016/j.jappgeo.2011.02.009.
Petrovsky′ E, Ellwood BB: Magnetic monitoring of pollution of air, land and waters. Quaternary Climates, Environments and Magnetism. Edited by: Maher BA, Thompson R. 1999, UK: Cambridge University Press, 279-322.
Veneva L, Hoffmann V, Jordanova D, Jordanova N, Fehr T: Rock magnetic, mineralogical and microstructural characterization of fly ashes from Bulgarian power plants and the nearby anthropogenic soils. Phys Chem Earth. 2004, 29: 1011-1023. 10.1016/j.pce.2004.03.011.
Thompson R, Oldfield F: Environmental Magnetism. 1986, London: Allen and Unwin
Schmidt A, Yarnold R, Hill M, Ashmore M: Magnetic susceptibility as proxy for heavy metal pollution: a site study. J Geochem Explor. 2005, 85: 109-117. 10.1016/j.gexplo.2004.12.001.
Haghani S, Amini AH, Alizadeh H, Leroy S: EGU General Assembly conference, held 2–7 May, 2010 in Vienna, Austria. Application of magnetic susceptibility of Holocene deposits in survey on Caspian sea-level fluctuation. 2010, 7893-
Dearing JA: Environmental Magnetic Susceptibility Using the Bartington MS2 System. 1999, Oxford: England, 2
Sparks DL, Page AL, Helmke PA, Loeppert RH, Soltanpour PN, Tabatabai MA, Johnston CT, Sumner ME: Methods of Soil Analysis- Part3-Chemical Methods, SSSA Book Series. 1996, USA, 127-128.
APHA AWWA, WEF: Standard methods for the examination of water and wastewater. 1998, Washington, DC: American Public Health Association, American Water Work Association, Water Environment Federation, 20
NYSDEC (NewYork State Department of Environmental Conservation): Technical Guidance for Screening Contaminated Sediments. 1999, Wildlife and Marine Resources, Albany, New York: Department of Fish
Graney JR, Eriksen TM: Metals in pond sediments as archives of anthropogenic activities: a study in response to health concerns. Appl Geochem. 2004, 19: 1177-1188. 10.1016/j.apgeochem.2004.01.014.
Pourang N, Richardson CA, Mortazavi MS: Heavy metal concentrations in the soft tissues of swan mussel (Anodonta cygnea) and surficial sediments from Anzali wetland, Iran. Environ Monit Assess. 2010, 163: 195-213. 10.1007/s10661-009-0827-7.
Ghazban F, Zare M: Source of heavy metal pollutions in sediments of the Anzali wetland in northern Iran. J Environ Stud. 2009, 37 (1): 45-56.
Amini Ranjbar G: Heavy metal concentration in surficial sediments from Anzali wetland, Iran. Water Air Soil Pollut. 1997, 104: 305-312.
Öztürk M, Özözen G, Minareci O, Minareci E: Determination of heavy metals in fish, water and sediments of Avsar Dam Lake in Turkey. Iran J Environ Health Sci & Eng. 2009, 6 (2): 73-80.
Chandra Sekhar K, Chary NS, Kamala CT, Suman Raj DS, Sreenivasa Rao A: Fraction studies and bioaccumulation of sediment-bound heavy metals in Kolleru lake by edible fish. Environ Int. 2003, 29: 1001-1008.
Avila-Perez P, Balcazar M, Zarazua-Ortega G, Barcelo-Quintal I, Dıaz-Delgado C: Heavy metal concentrations in water and bottom sediments of a Mexican reservoir. Sci Total Environ. 1999, 234: 185-196. 10.1016/S0048-9697(99)00258-2.
Sartaj M, Fathollahi F, Filizadeh Y: An investigation of the evolution of distribution and accumulation of heavy metals (Cr, Ni, Cu, Cd, Zn and Pb) in Anzali wetland’s sediments. Iranian J Nat Resour. 2005, 58 (3): 623-634.
Callender E, van Metre PC: Reservoir sediment cores show US lead declines. Environ Sci Technol. 1997, 31: A424-A428. 10.1021/es972473k.
Karbassi AR, Nabi Bidhendi G, Bayati I: Environmental geochemistry of heavy metals in sediment core of Bushehr, Iran. Iran J Environ Health Sci and Eng. 2005, 2 (4): 255-260.