استفاده از کشت مخلوط برای پالایش گیاهی خاک‌های آلوده به کادمیوم در حضور کی‌لیت‌های طبیعی و مصنوعی

نوع مقاله : مقاله کوتاه

نویسندگان

دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

چکیده

آلودگی خاک از چالش‌های مهم عصر کنونی است.یکی از روش‌های آلودگی‌زدایی خاک، روش پالایش گیاهی است. استفاده از عوامل کی‌لیت کننده در خاک می‌تواند کارآیی این روش را افزایش دهد. تا‌کنون از روش کشت مخلوط برای بررسی روش گیاه‌پالایی خاک‌های آلوده به فلزات سنگین استفاده نشده است. هدف از این پژوهش، ارزیابی توانایی گیاه پالایی دو گیاه شاهی و تربچه، به صورت کشت مخلوط، در حضور دو نوع کی‌لیت طبیعی و مصنوعی در خاک‌های آلوده به کادمیوم بود. بدین منظور آزمایشی فاکتوریل در قالب طرح کاملاً تصادفی با 20 تیمار و سه تکرار انجام شد. فاکتور‌های آزمایشی شامل کادمیوم درپنج سطح (0،3،10،25،50 میلی‌گرم در کیلوگرم خاک از منبع نیترات کادمیوم)، کی‌لیت‌های اتیلن دی آمین تترا استیک اسید 1EDTA و نیتریلو تری استیک اسید 2NTA در دو غلظت 1 و 5/2 میلی‌مول بر کیلوگرم خاک بود. نتایج نشان داد پتانسیل استخراج سبز کادمیوم از خاک در کشت مخلوط بیشتر از روش تک‌کشتی است به‌گونه‌ای که پتانسیل استخراج سبز کادمیوم از خاک در تیمار کی‌لیت EDTA2.5 در 3Cd50 گیاه تربچه و شاهی در کشت مخلوط به ترتیب 7/7 و 7/5 و در روش تک‌کشت 4/5 و 4 کیلوگرم کادمیوم در هکتار ­است. هم‎چنین،پتانسیل استخراج سبز کادمیوم از خاک توسط تربچه بیش از شاهی بود. نتایج هم‎چنین نشان داد که کی‌لیت EDTA در مقایسه با NTA در استخراج سبز کادمیوم از خاک موثرتر بوده و انتقال کادمیوم از ریشه به شاخساره در حضور کی‌لیت EDTA بیشتر از  NTAاست.

کلیدواژه‌ها


عنوان مقاله [English]

Applying Multicropping System to Phytoremediate Cadmium Contaminated Soils by Using Natural and Synthetic Chelates

نویسندگان [English]

  • Donya Mottaghi
  • Mehdi Homaee
  • Rasoul Rahnemaie
Faculty of Agriculture, Tarbiat Modares University, Tehran
چکیده [English]

Soil contamination is one of the most recent and important environmental challenges worldwide. The so-called phytoremediation is one of the reclamation technologies used to decontaminate polluted soils. Application of some chelate agents can increase the efficiency of phytoremediation. However, this technology has not been evaluated for decontamination of heavy metals under multicropping system. The objective of this study was to evaluate the phytoremediation capability of cress and radish, as a mixed-culture by using some natural and synthetic chelates in Cd-contaminated soils. Consequently, a factorial experiment in a completely randomized design with 20 treatments and three replications was conducted. The experimental factors were consisted of five levels of cadmium (0, 3, 10, 25, 50 mg Cd kg-1 soil, added as Cd(NO3)2, EDTA and NTA chelates, and chelate concentrations of 1 and 2.5 mmol kg-1 soil. Results indicated that the Cd phytoextraction potential in multicropping culture is higher than the single-cropping system. Phytoextraction of cadmium from contaminated soils for both cress and radish plants, in EDTA2.5 and Cd50 treatments was 7.7 and 5.7 kg Cd ha-1 in multicropping system and was 4 and 5.4 kg Cd ha-1 in the single-cropping system. Furthermore, radish could phytoextract more cadmium than cress from the contaminated soils. The results further indicated that EDTA could enhance more Cd phytoextraction than NTA and can better assist to transfer cadmium from roots to shoots.

کلیدواژه‌ها [English]

  • Cadmium
  • Chelate
  • Cress
  • Multicropping
  • Phytoremediation
  • Radish
  1. Atafar Z, Mesdaghinia A R, Nouri J, Homaee M, Yunesian M, Ahmadimoghaddam M, Mahvi A H. Effect of fertilizer application on soil heavy metal concentration. Environmental Monitoring and Assessment; 2010; 160:83-89.
  2. Khodaverdiloo H, Homaee M, Liaghat A M, Mirnia KH. Quantitative assessmentAbility toPhytoremediation of Cadmium contaminated soils using Cress. Iranian Journal of Agriculture science; 2008; 13(2): 357-371. [In Persian]
  3. Dallalian M R, Homaee M.Simulating of Phytoremediation Time of Cadmium and Copper Spiked Soil by Salvia Sclarea. Water and Soil Science; 2010; 20(4): 129-141. [In Persian]
  4. Asadi Kapourchal S, Eisazadeh Lazarjan S, Homaee M. Phytoremediation of cadmium polluted soils resulting from use of phosphorus fertilizers. Curr Opinion in Biotech; 2011; 225:S15-S152.
  5. Jafarnejadi A R, Homaee M, Sayad G, Baybordi M. Evaluation of main soil properties affecting Cd concentrations in soil and wheat grains on some calcareous soils of Khuzestan Province. Journal of Water and Soil Conservation; 2012; 19(2): 149-164. [In Persian]
  6. Jafarnejadi AR, Homaee M, Sayyad G. Large scale spatial variability of accumulated Cadmium in the wheat farm grains. Soil and Sediment Contamination Journal; 2011; 20(1): 93-99.
  7. JafarnejadiAR, Sayyad G, Homaee M, Davami A H. Spatial variability of soil total and DTPA-extractable cadmium caused by long-term application of phosphate fertilizer, crop rotation and soil characteristics. Environ Monito Assess; 2013; 185: 4087-4096.
  8. Evangelou M, Ebel W H M, Schaeffer A. Chelate assisted phytoextraction of heavy metals from soils. Effect, mechanism, toxicity, and fate of chelating agents. Chemosphere; 2007; 68: 989-1003.
  9. DavariM, Homaee M, Rahnemaei R. An analytical deterministic model forsimultaneous phytoremediation of Ni and Cd from contaminated soils. Environmental science and pollution research; 2015; DOI: 10.1007/S11356-014-4032-Z.
  10. Babaeian E, Homaee M, Rahnemaie. Enhancing Phytoextraction of Lead Contaminated Soils by Carrot (Daucus carrota) Using Synthetic and Natural Chelates.Journal ofSoil and Water; 2012; 26(3): 607-618. [In Persian]
  11. Arabi Z, Homaee M, Asadi M A. Comparison Effects of Citric Acid and Synthetic Chelators In Enhancing Phytoremediation of Cadmium. Journal of science and technology of Agriculture and Natural Resources Water and Soil Science; 2010; 14(54): 85-95. [In Persian]
  12. Quartacci MF, BakerA J M, Navari-Izzo F. Nitriloacetate and citric acid assisted phytoextraction of cadmium by Indian mustard (Brassica juncea (L.) Czernj, Brassicaceae). Chemosphere; 2005; 59: 1249-1255.
  13. Wenzel WW, Unterbrunner R, Sommer P, Pasqualina S. Chelate-assisted phytoextraction using canola (Brassica napus L.) in outdoors pot and lysimeter experiments. Plant Soil; 2003; 249: 83-96.
  14. Babaeian E, Homaee M, Rahnemaie R. Enhancing Lead Phytoextraction of Land Cress (Barbara verna) Using Aminopolycarboxylic Acids. Soil and Water Journal; 2010; 24(6): 1-9, Mashhad, Iran. [In Persian]
  15. Li HF, Wang Q R, Cui Y S, Dong Y T, Christie P. Slow release chelate enhancement of lead phytoextraction by corn ( Zea mays L.) from contaminated soil-a preliminary study. Environmental Pollution; 2005; 339: 179-187.
  16. Davari M, Homaee M. Providingamacromodel forPhytoremediationofsoils contaminated withnickelbased onLinearandnon-linear declinefunctions. Journal of Agroecology; 2011; 1(1): 1-13. [In Persian]
  17. Davari M, Homaee M. A New Yield Multiplicative Model for Simultaneous Phytoextraction of Ni and Cd from Contaminated Soils. Soil and Water Journal; 2011; 25(6): 1332-1343. Mashhad, Iran. [In Persian]
  18. Davari M, Homaee M, Khodaverdiloo H. Modeling Phytoremediation of Ni and Cd from Contaminated Soils Using Macroscopic Transpiration Reduction Functions. Journal of science and technology of Agriculture and Natural Resources Water and Soil Science; 2010; 14(52): 75-85. [In Persian]
  19. Khodaverdiloo H, Homaee M. Modeling Phytoremediation of Cd from Contaminated Soils Using Macroscopic Transpiration Reduction Functions. Iranian Journal of Irrigation & Drainage; 2008; 2(1): 1-16. [In Persian]
  20. Asadi Kapourchal S, Asadi Kapourchal S, Pazira E, Homaee M. Assessing radish potential for phytoremediation of lead-polluted soils resulting from air pollution . Plant Soil and Environment; 2009; 55(5): 202-206.
  21. MauskarJM. cadmium – An Environment Toxicant central pollution control Board , Ministry of Environment & Forests , Govt of India , parivesh Bhawan; 2007; East Arjun Nagar , Delhi -110032.
  22. Khodaverdiloo, H. and M. Homaee. Modeliung Cadmium and Lead phytoextraction from contaminated soils. Polish Journal of soil Science; 2008; XLI(2): 149-162.
  23. Nowack B, Schulin R, Robinson B H. Critical assessment of chelant-enhanced metal phytoextraction. Environmental Science & Technology; 2006; 40(17): 5225-5232.
  24. Blaylock M J, Salt D E, Dushenkov S, Zakharova O, Gussman C, Kapulnik Y, Ensley B D, Raskin I. Enhanced accumulation of Pb in Indian mustard by soil-applied chelating agents. Environmental Science and Technology; 1997; 31: 860-865.
  25. Alipour N, Asadi Kapourchal S, Homaee M, Mazhari, M. Assessing Chenopodium album L. to Tolerate and Phytoextract Lead from Heavy Metal Contaminated Soils. Environmental Sciences; 2015; 13(1):105-112. [In Persian]
  26. Mohammadipour F, Asadi Kapourchal S. Assessing land cress potential for phytoextraction of cadmium from Cdcontaminated soils. Journal of Soil and Water Resources Conservation; 2012; 2(2):25-35. [In Persian]
  27. Eisazadeh Lazarjan S, Asadi Kapourchal S, Homaee M. Phytoextraction and estimating optimal time for remediation of Cd-contaminated soils by spinach (Spinacia oleracea L.). Journal of Agroecology; 2015; 4(2): 916-926. [In Persian].