توزیع فلزات سنگین در برگ و پوست درختان مورد استفاده در جنگلداری شهری همدان

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشگاه ملایر

چکیده

نقش درختان در کاهش میزان فلزهای سنگین و در نتیجه کاهش خطرهای محیط‌‌‌‌زیستی قابل انکار نیست. در بررسی حاضر، توزیع فلزهای کادمیوم، نیکل، سرب و روی در برگ و پوست گونه‌‌های درختی چنار، زبان‌‌گنجشک و کاج تهران در پارک‌‌های شهری همدان بررسی شد. بدین منظور در پارک‌‌های مختلف شهر همدان از پوست و برگ درختان نمونه‌‌برداری انجام شد. بعد از انتقال نمونه‌‌ها به آزمایشگاه و هضم آنها غلظت فلزها با دستگاه جذب اتمی اندازه‌‌گیری شد. نتایج حاصل نشان داد که غلظت فلز روی در پوست و برگ درختان در مقایسه با غلظت سایر فلزهای مورد بررسی بیشتر بود. همچنین مقایسه غلظت فلزها در پوست و برگ درختان با استانداردهای جهانی نشان داد که غلظت کادمیوم در پوست و برگ هر سه گونه مورد بررسی و غلظت نیکل در پوست دو گونه چنار و زبان‌‌گنجشک بالاتر از حد مجاز بود که حاکی از آلودگی محیط شهری است. نتایج همبستگی بین غلظت عناصر سنگین پوست و برگ درختان نشان داد که بین غلظت کادمیوم برگ و پوست گونه‌‌های چنار و کاج تهران همبستگی مثبت معنی‌‌داری در سطح پنج درصد وجود دارد. همچنین فقط در گونه کاج تهران بین غلظت سرب سوزن‌‌ها و پوست همبستگی مثبت معنی‌‌داری مشاهده شد. به‌‌طور کلی مقایسه غلظت فلزهای سنگین در برگ و پوست گونه‌‌های درختی مورد بررسی نشان داد درختان چنار و زبان‌‌گنجشک نسبت به کاج تهران توانایی بیشتری در جذب فلزهای سنگین از محیط اطراف خود را دارا هستند.

کلیدواژه‌ها


عنوان مقاله [English]

Distribution of Heavy Metals in Leaf and Bark of Trees Used in Urban Forestry of Hamadan

نویسندگان [English]

  • Farhad Ghasemi Aghbash
  • Samar Mortazavi
  • Reza Naderi
Malayer Unversity
چکیده [English]

The role of trees in reducing the amount of heavy metals in the air and thus reducing the environmental risks cannot be denied. In the present study, distribution of cadmium, nickel, lead and zinc metals was investigated in leaf and skin of Plane tree, Ash and Eldarica pine in urban parks of Hamadan. For this purpose, in the different parks of Hamadan, samples were taken from the skin and leaves of the trees. After transferring the samples to the laboratory and digesting them, the concentration of metals was measured by atomic absorption. Comparison of the concentration of heavy metals in the leaves and the skin of the tree species showed that the Plane trees have a higher ability to absorb of heavy metals than the Ash and Eldarica pine trees. The zinc concentration in the skin and the leaves of the trees was higher than the concentrations of other elements. Comparison of the concentrations of the elements in the skin and the leaves of the trees with global standards showed that the concentration of cadmium in the skin and leaves of trees was higher than the standard limit and the concentration of nickel in the skin of the two Plane tree and Ash species was higher than the standard limit Which indicates the pollution of the urban environment. Correlation between the concentration of heavy elements in the skin and the leaves of the trees showed that there was a significant positive correlation between cadmium concentrations in leaves and skin of Plane tree and Eldarica pine trees (P <0.05). In general, the comparison of heavy metal concentrations in the leaf and skin of the tree species showed that Plant tree and Ash were very effective in absorbing heavy metals from their surroundings than Eldarica pine.

کلیدواژه‌ها [English]

  • Urban park؛ Plane tree؛ Ash؛ Bioremediation؛ Heavy metals
  • Hamadan
Al Obaidy, A.H.M.J. & Al Mashhadi, A.A.M. 2013. Heavy metal contaminations in urban soil within Baghdad City, Iraq. Journal of Environmental Protection, 4(1): 72-82.

Ali Ahmad Korori, S.; Shirvani, A.; Abdi, A.; Talebi Khour Abadi, T.; Madani Mashaei, A. & Behtash, M.R. 2013. Lead and Cadmium Absorption of Plane and Mulberry Trees, an Indicator for Tehran Infection Zoning and Genetic Index Basis. Journal of Sustainable Natural Ecosystem Technology, 1-11. (in Persian).

Chen, C.; Huang, D. & Liu, J. 2009. Functions and Toxicity of Nickel in Plants: Recent Advances and Future Prospects. Clean, 37: 304-313.

Cheraghi, M.; Dadolahi, S.A.; Safahieh, A.; Ghanemi, K. & Doraghi, A. 2013. A Study On the Heavy Metals Accumulation in Sediment, Leaf and Root of Avicennia Marina in Khuzestan Province. Journal of Marine Sciences and Technology, 11(4): 46-56. (in Persian).

Fang S-B, H.H.; Chun Sun, W. & Pan, J.J. 2011. Spatial Variations of Heavy Metals in the Soils of Vegetable-Growing Land along Urban-Rural Gradient of Nanjing, China.  International Journal Environment Research Public Health, 8(6): 1805-1816.

Farzan, M. & Sobhan Ardakani, S. 2016. Analysis of Fe, Pb, and Cd Content of Surface Runoff in Regions with High Traffic Intensity in Hamedan, Iran, in 2014. Health System Research, 12(2): 208-213. (in Persian).

Ghori, Z.; Iftikhar, H.; Bhatti, M.F.; Nasar-um-Minullah, Sharma, I. & Kazi, A.G. 2016. Phytoextraction: the use of plants to remove heavy metals from soil, in Plant Metal Interaction: Emerging Remediation Techniques ed Ahmad P., editor. (Amsterdan; Boston, MA; Heidelberg; London; New York, NY; Oxford; Paris; San Diego, CA; San Francisco, CA; Singapore; Sydney, NSW; Tokyo: Elsevier), 385-409.

Haj Rasuliha S.; Amini, H.; Hoodaji, M. & Najafi, P. 2007. Biomonitoring of Air and Soil Pollution in Isfahan Region. Journal of Research in Agricultural Science, 2(2): 39-54. (in Persian).

Kabata-pendis, A. & Pendis, H. 1992. Trace Element in soils and Plants, CRC Press, London.

Kabata-Pendias, A. 2011. Trace elements in soils and plants, 4th ed. Taylor & Francis Group, Boca Raton London New York, 548 p.

Khademi, A. & Kord, B. 2010. The Role of Broad Leaf Species (The Plane Tree and The Ash) In Reducing the Pollution Resulting from Lead. Journal of Sciences and Techniques in Natural Resources, 5(1): 1-12. (in Persian).

Kuang, Y. W.; Zhou, G. Y. & Liu, S. Z. 2007. Heavy metals in bark of Pinus massoniana (Lamb.) as an indicator of atmospheric deposition near a smeltery at Qujiang, China. Environment Science Pollution Research. 14: 270-275.

Mingorance, M.D. & Oliva, S.R. 2006. Heavy metals content in N. oleander leaves as urban pollution assessment. Environment Monitoring Assessment. 119: 57-68.

Mollashahi, M.; Ali Mohammadian, H.; Hosseini, S.M.; Feizi, V. & Riyahi Bakhtiari, A. 2013. Zoning of Tehran air pollution to heavy metals using mulberry leaves. Geography and Environmental Hazards, 2(7): 69-84. (in Persian).

Naderi, R.; Ghasemi Aghbash, F. & Mortazavi, S. 2018. Distribution of heavy metals in leaves and bark of forest trees in Hamadan. Master Thesis, Faculty of Natural Resources & Environment, Malayer University, 104p. (in Persian).

Salari, H. & Moghtader, M. 2014. Thlaspi Rotundifolium is the best herbaceous plant of lead accumulating in infected areas. The first specialized bioremediation conference, Tehran. (in Persian).

Shabanian, N. & Cheraghi, Ch. 2013. Comparison of Phytoremediation of Heavy Metals by Woody Species Used in Urban Forestry of Sanandaj City. 21(1): 154-165. (in Persian).

Shete, A.; Gunali, V.R. & Pandit, G.G. 2007. Bioaccumulation of Zn and Pb in Avicennia marina (Forsk.) Vierh. And Sonneratia apetala Buch. Ham. from Urban Areas of Mumbai (Bombay), India. Journal of Applied Science Environment Management, 11(3): 109-112.

Shirvani, Z.; Pourkhabaz, A. & Ghaderi, M. 2012. Distribution of cadmium and lead in leaf and bark of Plane tree and Ash in Shiraz, Master Thesis, Faculty of Agriculture, Birjand University, 76p. (in Persian).

Shokri Ragheb, P. & Sobhan Ardakani, S. 2016. Analysis of Co, Cr and Mn Concentrations in Atmospheric Dry Deposition in Hamadan City. Avicenna Journal of Clinical Medicine, 23(2): 149-156. (in Persian).

Solgi, E.; Esmaili-Sari, A.; Riyahi Bakhtiari, A. & Hadipour, M. 2015. Soil Contamination by Arsenic in Urban Areas: A case study of Arak City. Iranian Journal of Health and Environment, 8(1):1-10. (in Persian).

Vaseghi, S.; Afyuni, M.; Shariatmadari, H. & Mobli, M. 2003. Effects of Sewage Sludge and Soil pH on Micronutrient and Heavy Metal Availability. Soil and Water Sciences, 7(3): 95-106. (in Persian).

Yap, C.K.; Ismail, A.; Tan, S.G. & Omar, H. 2002. Correlations between speciation of Cd, Cu, Pb and Zn in sediment and their concentrations in total soft tissue of green-lipped mussel Perna viridis from the west coast of Peninsular Malaysia. Environment International. 28: 117-126.