Interactions between marmatite and bornite during the oxidative dissolution process in abiotic and biotic systems

Zhang, Yanjun; Zhao, Hongbo; Zhang, Yisheng; Lü, Qian; Zhang, Luyuan; Meng, Xiaoyu; Lv, Xin; Abhilash, Abhilash; Janjua, Hussnain Ahmed; Qiu, Guanzhou

doi:10.1039/c9ra03658j

Cited by 7 publications

(2 citation statements)

References 48 publications

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“…Third, the solution was inoculated with bacteria and was maintained at 30 °C in the pH range of 1.5–1.8 by dropping sulfuric acid, and the aeration rate of air was 1.2 L/min. The bacterial solution sample was added to the blood cell counting plate for microscopic examination using an optical microscope every 12 h, and the bacteria concentration was calculated using the proposed method . The ORP of bacterial solutions was measured every 12 h by the ORP meter (BPP-922).…”

Section: Methodsmentioning

confidence: 99%

“…The bacterial solution sample was added to the blood cell counting plate for microscopic examination using an optical microscope every 12 h, and the bacteria concentration was calculated using the proposed method. 23 The ORP of bacterial solutions was measured every 12 h by the ORP meter (BPP-922). When the bacterial concentration exceeded 2 × 10 8 cells/mL and the oxidation−reduction potential (ORP) reached 600 mV, the bacterial solution could be used for the leaching tests.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Galvanic Biomining: A Low-Carbon Hydrometallurgical Process for Efficient Resource Recovery and Power Generation

Zhang

Zhao

Hou

et al. 2023

ACS Sustainable Chem. Eng.

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Biomining/bioleaching has been widely considered as an alternative to traditional technologies in processing ores and solid wastes mainly due to its environmental and economic advantages, but the low leaching rate and adverse microorganism− environment interactions cause the severe restriction of industrial application. Here, we first report galvanic biomining that achieves both efficient resource recovery and power generation based on the Fe 2+ /Fe 3+ redox couple of indirect/noncontact bioleaching. Ore oxidation, oxidant regeneration, and power generation are achieved in the oxidation leaching section, the bio-oxidation section, and the galvanic biomining reactor, respectively. At various temperatures and in the presence of toxic ions, leaching rates are approximately 10 times higher than those of conventional bioleaching, which represents a breakthrough of the above bottleneck. The power generation, bacterial carbon sequestration, and total carbon sequestration are 23.5 kW h, 34.4, and 2510 kg, respectively, per ton of copper produced. The galvanic biomining effectively regenerates oxidants at room temperature and significantly reduces power consumption and the carbon footprint.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%