Phytoextraction of gold and copper by Composite and Normal plants of Borago officinalis

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 873

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شناسه ملی سند علمی:

ICDAN03_067

تاریخ نمایه سازی: 5 بهمن 1395

چکیده مقاله:

To examine the feasibility of gold phytoextraction, and the corresponding uptake of copper that is induced at the same time, greenhouse and laboratory scale experiments (composite plants) were carried out using mine tailings and soil from the Zarshouran gold mine in Tekab, Iran. The available plant species B. officinalis was used in this work, incombination with the chemical amendments: sodium cyanide, ammonium thiocyanate,ammonium thiosulphate, and Potassium cyanide to promote gold uptake. The results show that for B. officinalis, average and maximum gold concentrations were 35.02 mg/kgand 81 respectively in the dry matter of aerial tissues with 2mg/kg potassium cyanide. For copper, average and maximum concentrations were 89 mg/kg and 118 mg/kg respectively in the dry matter of l tissues. For gold and copper uptake, Composite plantsof B. officinalis were very better than None Composite plans. Translocation factor (TF) of gold and copper were 0.89 and 1.73 respectively and there is not significant different between Composite and non compoosite plant of B.officinalis. Poor health of plants aftertreatment with chemicals to induce gold uptake could be a function of toxic concentrations of other trace elements such as copper in the plants. Our results confirmed that phytoextraction technology with B.officinalis can be used to recover precious metals, and that at the current market price for gold, this recovery can be economic

نویسندگان

Mahmood maleki

PhD student, Department of Biotechnology, Faculty of Agriculture, Bu-Ali Sina University, Hamedan

Khosro piri

Associate Professors, Department of Biotechnology, Faculty of Agriculture, Bu-Ali Sina University,Hamedan

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