EFFECT OF SAPONIN ON BIOLOGICAL OXIDATION OF PYRITE-CONTAINING SOLID WASTE FROM MINING AND DRESSING

YANG Shu; ZHOU Honghui; LI Ying; ZHANG Yun; TIAN Senlin; CHENG Xia; HU Han; HU Xuewei

doi:10.13205/j.hjgc.202303017

Volume 41 Issue 3

Mar. 2023

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YANG Shu, ZHOU Honghui, LI Ying, ZHANG Yun, TIAN Senlin, CHENG Xia, HU Han, HU Xuewei. EFFECT OF SAPONIN ON BIOLOGICAL OXIDATION OF PYRITE-CONTAINING SOLID WASTE FROM MINING AND DRESSING[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 129-135,215. doi: 10.13205/j.hjgc.202303017

Citation:

YANG Shu, ZHOU Honghui, LI Ying, ZHANG Yun, TIAN Senlin, CHENG Xia, HU Han, HU Xuewei. EFFECT OF SAPONIN ON BIOLOGICAL OXIDATION OF PYRITE-CONTAINING SOLID WASTE FROM MINING AND DRESSING[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 129-135,215. doi: 10.13205/j.hjgc.202303017

Citation:

YANG Shu, ZHOU Honghui, LI Ying, ZHANG Yun, TIAN Senlin, CHENG Xia, HU Han, HU Xuewei. EFFECT OF SAPONIN ON BIOLOGICAL OXIDATION OF PYRITE-CONTAINING SOLID WASTE FROM MINING AND DRESSING[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 129-135,215. doi: 10.13205/j.hjgc.202303017

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EFFECT OF SAPONIN ON BIOLOGICAL OXIDATION OF PYRITE-CONTAINING SOLID WASTE FROM MINING AND DRESSING

doi: 10.13205/j.hjgc.202303017

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

Received Date: 2022-04-22
Available Online: 2023-05-26
Publish Date: 2023-03-01

Abstract

Abstract

In order to improve the efficiency of biological oxidative decomposition of pyrite-containing solid waste from mining and dressing, this paper investigated the effect of saponin on the release of H⁺, Fe and S in the biological oxidation process of pyrite-containing solid waste from mining and dressing, by using saponin-microorganism-sulfurous iron ore mining solid waste as a reaction system, and its mechanism was discussed. The results showed that it could release 0.55 mmol/g of H⁺, and 111.4 mg/g of total Fe, as well as 359.3 mg/g of SO₄^2- by adding 30 mg/L saponin and bio-oxidizing for 38 days from the pyrite-containing solid waste of mining and dressing, which were increased by 175%, 82.9% and 39.2%, respectively compared with the blank control group. Firstly, the addition of saponins accelerated the oxidative dissolution of the sendiment layer (jarosite, S⁰) on the mineral surface, and inhibited the formation of secondary mineral jarosite, thus slowed down the passivation effect. Secondly, it could significantly reduce the contact angle and surface tension between the solution and the mineral surface, and enhance the penetration of Fe³⁺ in the mineral microporous cracks, so as to accelerate the oxidation and dissolution of pyrite-containing solid waste from mining and dressing. The research results can provide theoretical support for application of saponin in the biological oxidation of pyrite-containing solid waste from mining and dressing.
- saponin,
- pyrite,
- solid waste of mining and dressing,
- biological oxidation,
- Acidithiobacillus ferrooxidans,
- inactivation

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References(30)

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