شبیه سازی زمان لازم برای پالایش سبز خاکهای آلوده شده به کادمیم و مس بوسیله گیاه مریم گلی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی واحد علوم و تحقیقات

2 دانشگاه تربیت مدرس

چکیده

پالایش ­سبز یکی از روش­های مناسب برای پالایش محیط زیست است که در آن از گیاهان برای پالایش خاک از فلزات سنگین استفاده می­شود. هدف از این پژوهش، شبیه­سازی زمان پالایش­سبز خاک­های آلوده به کادمیم و مس به­وسیله گیاه مریم گلی بود. بدین منظور از مدلی بر مبنای رفتار خاک و گیاه در برابر آلاینده­های کادمیم و مس استفاده شد. برای دستیابی به داده­های لازم برای ارزیابی مدل­، خاکی با بافت لوم‌شنی با غلظت­های مختلف کادمیم و مس آلوده شد. پس از پر کردن گلدان­های 5/7 کیلوگرمی با خاک­های آلوده، بذرهای مریم­گلی Salvia sclarea در آنها کشت گردید. مدل‌ ارائه شده با استفاده از داده‌های آزمایشگاهی واسنجی گردید و کارایی آن‌ با ملاک‌های کمّی آزموده شد. نتایج نشان داد که نرخ پالایش­سبز کادمیم و مس به‌وسیله­ مریم ­گلی تابع مرتبه­ صفر از غلظت آن‌ها در خاک بود. همچنین نتایج بیانگر کارآیی بالای مدل‌های پیشنهادی با همدمای برون جذبی خطی در برآورد زمان پالایش­سبز کادمیم و مس از خاک بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Simulating of Phytoremediation Time of Cadmium and Copper Spiked Soils by Salvia sclarea

نویسندگان [English]

  • MA Dalalian 1
  • M Homaee 2
چکیده [English]

Phytoremediation is one of the environmental friendly technology that uses plants to clean up soil from heavy metals contamination. The prerequisite for successful phytoremediation is the existence of hyperaccumulator plants. The objective of this study was simulation phytoremediation time of Cd and Cu-spiked soils by Salvia sclarea. A mathematical model was used based on soil and plant responses to Cd and Cu pollutants. To verify the model, an extensive experimental set up was established to obtain the needed data. Large quantity of a sandy loam soil was thoroughly mixed with Cd and Cu to obtain homogeneous concentration of these pollutants within the soil matrix. The Cd and Cu spiked soils were packed into the designated pots. Salvia sclarea seeds were germinated in the containing  7.5 Kg of Cd and Cu spiked soils. The proposed models then were calibrated using the collected data and validated quantitatively. The results indicated that phytoremediation rate of Cd and Cu by Salvia s. is zero-order function for Cd and Cu concentration in soil. The results also indicated that the proposed model with linear adsorption isotherm can reasonably predict the time needed for the remediation of soil Cd and Cu.
 

کلیدواژه‌ها [English]

  • Cadmium (Cd)
  • Copper (Cu)
  • Phytoremediation
  • Simulation
  • Soil pollution

مراجع

Adhikari T and Singh MV, 2003. Sorption characteristics of lead and cadmium in some soils of India. Geoderma 114:81-92.
Alexader M, 1994. Biodegradation and bioremediation. Academic Press, USA.
Anonymous, 1998. A citizen`s guide to phytoremediation. EPA 542-F-98-0ll, Technology Innovation Office.
Basic N, Salamin N, Keller C, Galland N and Besnard G, 2006. Cadmium hyperaccumulation and genetic differentiation of Thlaspi caerulescens populations. Biochemical Systematics and Ecology 34:667-677.
Cao X, Ma LQ, Chen M, Singh SP and Harris WG, 2002. Impacts of phosphate amendments on lead biogeochemistry in a contaminated site. Environ Sci Technol 36: 5296–5304.
Cariny T, 1995. The Re-use of Contaminated Land. John Wiley and Sons, Ny.
Chen YX, He YF, Yang Y, Yu YL, Zheng SJ, Tian GM, Luo YM and Wong MH, 2003. Effect of cadmium on nodulation and N2-fixation of soybean in contaminated soils. Chemospher 50:781-787.
Gupta PK, 2000. Soil, Plant, Water and Fertilizer Analysis. Agrobios, New Delhi, India.
Henry JR, 2000. An Overview of the Phytoremediaton of Lead and Mercury. U.S. Environmental Protection Agency Office of Soild Waste and Emergency Response Technology Innovation Office. WashingtonDC.
Homaee M, Dirksen C and Feddes RA, 2002c. Simulation water uptake. III. Non-uniform transient joint salinity and water stress. Agric Water Mangt 57:127-144.
Khodaverdiloo H and Homaee M, 2008. Modeling of cadmium and lead phytoextraction from contaminated soils. Polish Journal of Soil Science 41:149-162.
Mat LQ, Komar KM, Tu C and Zhang W, 2001. A fern that hyperaccumulates arsenic. Nature 409: 579.
McGrath SP and Zhao FJ, 2003. Phytoextraction of metals and metalloids from contaminated soils. Current Opinion in Biotechnology 14: 1-6.
Mirsal AI, 2004. Soil Pollution: Origin, Monitoring and Remediation. Springer-Verlag, Berlin.
Ouyang Y, 2002. Phytoremediation: modeling plant uptake and contaminant transport in the soil-plant-atmosphere continuum. J Hydrol  266:66-82.
Shu WS, Ye ZH, Lan CY, Zhang ZQ and Wong MH, 2002. Lead, zinc and copper accumulation and tolerance in populations of Paspalum distichum and Cynodon dactylon. Environ Pollut 120: 445–453.
Sulcek, Z and Povondra P, 1989. Methods of decomposition in inorganic analysis. CRC Press, Inc.,Boca Raton, FL.
Sun YB, Zhou QX, Wang L and Liu WT, 2009. Cadmium tolerance and accumulation characteristics of Bidens pilosa L. as a potential Cd-hyperaccumulator. Journal of Hazardous Materials 161:808-814.
Tudoreanu L and Phillips CJC, 2004. Modeling cadmium uptake and accumulation in plants. Adv Agron 84:121-157.
Vogel-Mikus K, Drobne D and Reguar M, 2005. Zn, Cd and Pb accumulation and arbuscular mycorrhizal colonization of pennycress Thlaspi praecox wulf. (Brassicoceae) from the vicinity of a lead mine and smelter in Slovenia. Environmental Pollution 133: 233-242.
Yanai J, Zhao FJ, McGrath SP and Kosaki T, 2006. Effect of soil characteristics on Cd uptake by the hyperaccumulator Thlaspi caerulescens. Environmental Pollution 139:167-175.
Zhou LX and Wong JWC, 2001. Effect of dissolved organic matter from sludge and sludge compost on soil copper sorption. J Environ Qual 30:878-883.

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