银离子对钴矿石微生物浸出的影响
|
摘要
在微生物浸出钴矿石过程中添加银离子,考察了银离子对浸矿细菌生长、钴矿石生物浸出行为的影响。结果表明,银离子添加量对浸矿细菌的生长有直接影响,当添加量低于20 mg/L时,银离子对浸矿细菌的生长影响不大,但继续提高银离子浓度将对浸矿细菌的生长产生抑制作用;添加银离子能够加速含钴矿物的氧化溶解速率,显著提高金属浸出率,在矿浆浓度10%、浸出温度38℃、转速160 r/min、银离子浓度15 mg/L条件下,银离子的催化效果最佳,此时金属钴浸出率可提高28.0%,金属铜浸出率可提高26.8%。
A study was conduct on the bioleaching of cobalt ore by adding silver ion for investigating effects of Ag~+ on the bacterial growth and bioleaching behavior of cobalt ore. The results indicated that the bacterial growth was sensitive to the concentration of Ag~+ in the culture medium. When the Ag~+ concentration was less than 20 mg/L, Ag~+ had less effect on bacterial growth. However, the bacterial growth was inhibited as the concentration of Ag~+ increased. Furthermore, the addition of Ag~+ promoted the dissolution of minerals, thus significantly enhanced the bioleaching efficiencies of metals. It was shown that with slurry concentration of 10%, leaching temperature of 38 ℃, rotation speed at 160 r/min, Ag~+ concentration of 15 mg/L, the leaching efficiencies of cobalt and copper could be increased by 28.0% and 26.8%, respectively, achieving a best catalytic effect of Ag~+.
A study was conduct on the bioleaching of cobalt ore by adding silver ion for investigating effects of Ag~+ on the bacterial growth and bioleaching behavior of cobalt ore. The results indicated that the bacterial growth was sensitive to the concentration of Ag~+ in the culture medium. When the Ag~+ concentration was less than 20 mg/L, Ag~+ had less effect on bacterial growth. However, the bacterial growth was inhibited as the concentration of Ag~+ increased. Furthermore, the addition of Ag~+ promoted the dissolution of minerals, thus significantly enhanced the bioleaching efficiencies of metals. It was shown that with slurry concentration of 10%, leaching temperature of 38 ℃, rotation speed at 160 r/min, Ag~+ concentration of 15 mg/L, the leaching efficiencies of cobalt and copper could be increased by 28.0% and 26.8%, respectively, achieving a best catalytic effect of Ag~+.
引文
[1]Zeng J,Gou M,Tang Y Q,et al.Effective bioleaching of chromium in tannery sludge with an enriched sulfur-oxidizing bacterial community[J].Bioresource Technology,2016,218(10):859-866.
[2]甘晓文,王军,赵红波,等.Fe3+对黄铜矿与铁闪锌矿分步浸出的影响机制[J].矿冶工程,2017,37(1):77-80.
[3]张旭,冯雅丽,王雅静.黄铁矿高效培养嗜酸氧化亚铁硫杆菌及过程分析[J].矿冶工程,2018,38(1):88-91.
[4]Pathak A,Morrison L,Healy M G.Catalytic potential of selected metal ions for bioleaching,and potential techno-economic and environmental issues:A critical review[J].Bioresource Technology,2017,229:211-221.
[5]刘伟,杨洪英,佟琳琳,等.活性炭对钴矿物生物浸出的催化作用[J].中国有色金属学报,2014,24(4):1050-1055.
[6]Zhang R Y,Wei D Z,Shen Y B,et al.Catalytic effect of polyethylene glycol on sulfur oxidation in chalcopyrite bioleaching by Acidithiobacillus ferrooxidans[J].Minerals Engineering,2016,95:74-78.
[7]刘伟,杨洪英,佟琳琳,等.表面活性剂对钴矿石生物浸出的影响[J].东北大学学报(自然科学版),2015,36(6):814-818.
[8]Wang J,Liao R,Tao L,et al.A comprehensive utilization of silverbearing solid wastes in chalcopyrite bioleaching[J].Hydrometallurgy,2017,169(5):152-157.
[9]Tai L M,Xu C F.The leaching behavior of copper from chalcopyrite tailings in the presence of silver ion in bioleaching system[J].Disaster Advances,2013(6):145-150.
[10]Zeng G S,Luo S L,Deng X R,et al.Influence of silver ions on bioleaching of cobalt from spent lithium batteries[J].Minerals Engineering,2013,49:40-44.
[11]Li Y,Kawashima N,Li J,et al.A review of the structure,and fundamental mechanisms and kinetics of the leaching of chalcopyrite[J].Advances in Colloid and Interface Science,2013,197:1-32.
[12]Ahmadi A,Schaffie M,Manafi Z,et al.Electrochemical bioleaching of high grade chalcopyrite flotation concentrates in a stirred bioreactor[J].Hydrometallurgy,2010,104(1):99-105.
[13]Chen S,Lin J.Enhancement of metal bioleaching from contaminated sediment using silver ion[J].Journal of Hazardous Materials,2009,161(2):893-899.
[14]Guo P,Zhang G,Cao J.Catalytic effect of Ag+and Cu2+on leaching realgar(As2S2)[J].Hydrometallurgy,2011,106(1-2):99-103.
[15]Abdollahi H,Shafaei S Z,Noaparast M,et al.Mesophilic and thermophilic bioleaching of copper from a chalcopyrite-containing molybdenite concentrate[J].International Journal of Mineral Processing,2014,128:25-32.
[16]曲峰,许恒毅,熊勇华,等.纳米银杀菌机理的研究进展[J].食品科学,2010,31(17):420-424.
[2]甘晓文,王军,赵红波,等.Fe3+对黄铜矿与铁闪锌矿分步浸出的影响机制[J].矿冶工程,2017,37(1):77-80.
[3]张旭,冯雅丽,王雅静.黄铁矿高效培养嗜酸氧化亚铁硫杆菌及过程分析[J].矿冶工程,2018,38(1):88-91.
[4]Pathak A,Morrison L,Healy M G.Catalytic potential of selected metal ions for bioleaching,and potential techno-economic and environmental issues:A critical review[J].Bioresource Technology,2017,229:211-221.
[5]刘伟,杨洪英,佟琳琳,等.活性炭对钴矿物生物浸出的催化作用[J].中国有色金属学报,2014,24(4):1050-1055.
[6]Zhang R Y,Wei D Z,Shen Y B,et al.Catalytic effect of polyethylene glycol on sulfur oxidation in chalcopyrite bioleaching by Acidithiobacillus ferrooxidans[J].Minerals Engineering,2016,95:74-78.
[7]刘伟,杨洪英,佟琳琳,等.表面活性剂对钴矿石生物浸出的影响[J].东北大学学报(自然科学版),2015,36(6):814-818.
[8]Wang J,Liao R,Tao L,et al.A comprehensive utilization of silverbearing solid wastes in chalcopyrite bioleaching[J].Hydrometallurgy,2017,169(5):152-157.
[9]Tai L M,Xu C F.The leaching behavior of copper from chalcopyrite tailings in the presence of silver ion in bioleaching system[J].Disaster Advances,2013(6):145-150.
[10]Zeng G S,Luo S L,Deng X R,et al.Influence of silver ions on bioleaching of cobalt from spent lithium batteries[J].Minerals Engineering,2013,49:40-44.
[11]Li Y,Kawashima N,Li J,et al.A review of the structure,and fundamental mechanisms and kinetics of the leaching of chalcopyrite[J].Advances in Colloid and Interface Science,2013,197:1-32.
[12]Ahmadi A,Schaffie M,Manafi Z,et al.Electrochemical bioleaching of high grade chalcopyrite flotation concentrates in a stirred bioreactor[J].Hydrometallurgy,2010,104(1):99-105.
[13]Chen S,Lin J.Enhancement of metal bioleaching from contaminated sediment using silver ion[J].Journal of Hazardous Materials,2009,161(2):893-899.
[14]Guo P,Zhang G,Cao J.Catalytic effect of Ag+and Cu2+on leaching realgar(As2S2)[J].Hydrometallurgy,2011,106(1-2):99-103.
[15]Abdollahi H,Shafaei S Z,Noaparast M,et al.Mesophilic and thermophilic bioleaching of copper from a chalcopyrite-containing molybdenite concentrate[J].International Journal of Mineral Processing,2014,128:25-32.
[16]曲峰,许恒毅,熊勇华,等.纳米银杀菌机理的研究进展[J].食品科学,2010,31(17):420-424.