2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 1: Mining
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 424 pages |
| ISBN: | 978-1-987820-03-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Gold, Silver, and Copper Phytoextraction by Helianthus annuus L. (sunflower) Grown on Mine Tailings Amended with Rooting and Cyanide
Erick Y. Wilson-Perea1; Victor Wilson-Corral2; Juan I. Sarmiento-Sanchez2; Christopher Anderson3; Leopoldo Partida-Ruvalcaba2; Mayra C. Rodriguez-Lopez4; Teresa de Jesus Velazquez-Alacaraz2; Jeiry Toribio-Jimenez5; Werner Rubio Carrasco6;1CENTRO DE ESTUDIOS JUSTO SIERRA (CEJUS), Badiraguato, Mexico; 2AUTONOMOUS UNIVERSITY OF SINALOA, Culiacan, Mexico; 3MASSEY UNIVERSITY, Palmerston North, New Zealand; 4CENTRO DE ESTUDIOS JUSTO SIERRA (CEJUS), Surutato, Mexico; 5AUTONOMOUS UNIVERSITY OF GUERRERO, Chilpancingo, Mexico; 6CENTRO DE INVESTIGACION EN ALIMENTACION Y DESARROLLO (CIAD A. C.), Culiacan, Mexico;
Type of Paper: Regular
Id Paper: 255
Topic: 1
Abstract:
Phytomining has been suggested as an alternative technique for the recovery of gold from some areas of mine tailings and mineralized soil. Plant Growth Regulators have been used to improve rates of metal phytoextraction by some plant species. However, no studies have been published the efficacy of exogenous plant growth regulators to specifically improve the performance of gold phytoextraction for plants growing in mine tailings. To evaluate the influence of plant growth regulators on Au, Ag, and Cu phytoextraction, two commercial products (NaphtaleneAcetic Acid, NAA; and Indole-3-Butyric Acid, IBA) were tested under shade-house conditions. Helianthus annuus L. (sunflower) was grown in mine tailings with a gold concentration of 2.30 mg/kg and a high concentration of Cu and Fe. Solutions of plant growth regulators were applied to plants two weeks after seeding. At the end of the seven-week growth period, a solution of sodium cyanide was applied to each pot to induce metal uptake. Results show that a plant growth regulator solution made up of NAA and IBA can increase the average Cu concentration up to 313 %, the average Ag concentrations up to 150 %, and the average Au concentrations up to 36 % relative to control treatments. This is the first evidence supporting the potential benefit of using rooting (exogenous) plant growth regulators to improve the Au, Ag and Cu concentration in plants grown at mine tailings. The application of this result could benefit directly the profit of phytomining operations.