Iron Removal from Kaolin by Using Organic Acids of Fungal Fermentation
In this research bioleaching or extraction of iron present in a kaolin from La Virgen mine, Antioquia/Colombia, was carried out. Organic acids produced in SF with Aspergillus niger were used in the process. The fermentation process was carried out in 3 L aerobic stirred bioreactors, at a temperature of 30℃, a stirrerd speed of 700 rpm, an initial pH of 4 and a fermentation time variable between one to 8 days, obtaining broth fermentation samples dally per bioreactor. For iron extraction, fermented broth from second to sixth day of fermentation was evaluated and it was found that the fermentation broth of the third day showed a larger potential for iron removal, 786 ppm, by using kaolin with an initial iron content of 1401 ppm. A set of tests using commercial organics acids such as citric acid and oxalic were carried out because those were found in the fermentation broth and it was found that oxalic acid presented three times more iron removal than citric acid.
Kaolin Iron removal Organic acids Fungal fermentation
M. E. Ramírez J. E. López G.J. Colmenares C. Ocampo A. Castillo
Centro de Estudiosy de Investigación en Biotecnología (CIBIOT), Universidad Pontificia Bolivariana, Sumicol, Sabaneta
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2605-2610
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）