Wang Heru, Guo Qian, Guo Zehao, Luo Haowei, Li Honghu, Yang Jun, Song Yongwei
Laboratory Centre for Safety and Environment, Zhongnan University of Economics and Law, Wuhan 430073, China; These authors contributed equally to this work (E-mail:
Department of Environmental Engineering, School of Information and Safety Engineering, Zhongnan University of Economics and Law, Wuhan 430073, China E-mail:
Water Sci Technol. 2023 Apr;87(8):1879-1892. doi: 10.2166/wst.2023.098.
Soluble iron and sulfate in acid mine drainage (AMD) can be greatly removed through the formation of minerals facilitated by seed crystals. However, the difference in the effects of jarosite and schwertmannite as endogenous seed crystals to induce AMD mineralization remains unclear. This paper intends to study the effect of Fe oxidation and Fe mineralization in the biosynthesis of minerals using different addition amounts and methods of jarosite or schwertmannite. The results showed that the addition amount and method of different seed crystals had no effect on the Fe bio-oxidation but would change the Fe mineralization efficiency. With the same amount of seed crystals added, jarosite exhibited a higher capacity to promote Fe mineralization than schwertmannite. Adding seed crystals before the initiation of Fe oxidation (0 h) could significantly promote Fe mineralization efficiency. With the increase of seed crystals, jarosite could not only shorten the time required for mineral synthesis but also improve the final mineral yield, whereas schwertmannite could only shorten the time required for mineral synthesis. When Fe was completely oxidized to Fe (48 h), the supplementary of jarosite could still effectively improve Fe mineralization efficiency, but the addition of schwertmannite no longer affected the final mineralization degree.
通过由晶种促进形成矿物，可大幅去除酸性矿山排水（AMD）中的可溶性铁和硫酸盐。然而，黄钾铁矾和施氏矿物作为内源性晶种诱导AMD矿化的效果差异仍不明确。本文旨在研究使用不同添加量和添加方式的黄钾铁矾或施氏矿物在矿物生物合成中对铁氧化和铁矿化的影响。结果表明，不同晶种的添加量和添加方式对铁生物氧化没有影响，但会改变铁矿化效率。在添加相同量晶种的情况下，黄钾铁矾促进铁矿化的能力高于施氏矿物。在铁氧化开始前（0小时）添加晶种可显著提高铁矿化效率。随着晶种添加量的增加，黄钾铁矾不仅可以缩短矿物合成所需的时间，还能提高最终矿物产量，而施氏矿物只能缩短矿物合成所需的时间。当铁完全氧化为Fe（48小时）时，添加黄钾铁矾仍可有效提高铁矿化效率，但添加施氏矿物不再影响最终矿化程度。
