Use of phytoremediation technology as a management option for soils contaminated with heavy metal ions

سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 392

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شناسه ملی سند علمی:

CHCONF05_052

تاریخ نمایه سازی: 2 تیر 1397

چکیده مقاله:

Heavy metals are among the contaminants in the environment. Beside the natural activities, almost all human activities also have potential contribution to produce heavy metals as side effects. Migration of these contaminants into no contaminated areas as dust or leachates through the soil and spreading of heavy metals containing sewage sludge are a few examples of events contributing towards contamination of the ecosystems. Several methods are already being used to clean up the environment from these kinds of contaminants, but most of them are costly and far away from their optimum performance. The chemical technologies generate large volumetric sludge and increase the costs chemical and thermal methods are both technically difficult and expensive that all of these methods can also degrade the valuable component of soils. Conventionally, remediation of heavy-metal contaminated soils involves either onsite management or excavation and subsequent disposal to a landfill site. This method of disposal solely shifts the contamination problem elsewhere along with the hazards associated with transportation of contaminated soil and migration of contaminants from landfill into an adjacent environment. Soil washing for removing contaminated soil is an alternative way to excavation and disposal to landfill. This method is very costly and produces a residue rich in heavy metals, which will require further treatment. Moreover, these physic-chemical technologies used for soil remediation render the land usage as a medium for plant growth, as they remove all biological activities. Recent concerns regarding the environmental contamination have initiated the development of appropriate technologies to assess the presence and mobility of metals in soil, water, and wastewater. Presently, phytoremediation has become an effective and affordable technological solution used to extract or remove inactive metals and metal pollutants from contaminated soil. Phytoremediation is the use of plants to clean up a contamination from soils, sediments, and water. This technology is environmental friendly and potentially cost effective. In this study, application of phytoremediation technology as a management option for soils contaminated with heavy metal ions it was discussed.

نویسندگان

Hedieh Ahmadpari

M.Sc. Student of Irrigation and Drainage, Faculty of Aburaihan, University of Tehran

Mortaza Mohamadi Sedigh

M.Sc. Graduate of Water Resources Engineering, Department of Water Engineering, University of Zabol

Efat Mohamadi

M.Sc. Student of Water Resources Engineering, Department of Water Engineering, University of Zabol