揭开工业副产品的隐藏价值:优化生物炼,从基本氧气钢铁粉尘和石中提取金属
Ipek Tezyapar Kara1, Nuannat Simmons1, Stuart T Wagland1
1Cranfield University, School of Water, Energy and Environment, Cranfield, MK43 0AL, UK.
Chemosphere
|September 27, 2023
概括
生物炼有效地从工业废物 (如钢铁制造灰尘) 中提取诸如和稀土元素等贵重金属. 这一过程提供了经济效益,并通过回收金属和保存铁,促进了可持续的金实践.
科学领域:
- 金工程 金工程 金工程
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 由于含量高,工业副产品,如基本氧化钢制粉尘 (BOS-D) 和石经常被丢弃.
- 这些材料的现有再生过程效率低下,导致金行业产生大量的废物.
研究的目的:
- 调查生物溶解的潜力,从BOS-D和goethite提取有价值的金属.
- 使用特定的微生物菌株和统计设计方法,优化生物炼过程.
- 评估从工业废物中回收金属的经济和环境影响.
主要方法:
- 用于金属的生物化 * 酸酸菌铁氧化物 * .
- 采用了塔古奇直角阵列设计,以在三个层面上优化四个关键变量 (固体度,能量源度,注射液度,pH).
- 进行了14天的生物溶解实验,以确定最佳的提取条件.
主要成果:
- 优化了BOS-D的生物溶解,产生了高金属提取:11.2毫克Zn/g,3.2毫克Mn/g,1.6毫克Al/g,0.0013毫克Y/g和0.0026毫克Ce/g在pH1.5.
- 在pH 2下,优化生物溶解的goethite产生了26.6 mg Zn/g,2.1 mg Mn/g,1.8 mg Al/g,0.01 mg Co/g和0.0022 mg Y/g.
- 在生物溶解后,铁度在BOS-D和哥西特残留物中保持不变.
结论:
- 生物炼是一种可行且有效的方法,可以从工业副产品中回收贵金属.
- 优化过程表明,通过减少废物,经济收益和环境效益的巨大潜力.
- 保持铁含量支持在金行业实施更可持续的工业实践.
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