Hybrid zero-valent iron process for removing heavy metals and nitrate from flue-gas-desulfurization wastewater
Hybrid zero-valent iron process for removing heavy metals and nitrate from flue-gas-desulfurization wastewater
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DOI：
10.1016/j.seppur.2013.07.009
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发表时间：
2013-10-30
影响因子：
8.6
通讯作者：
Teng, Xinjun
中科院分区：
文献类型：
--
作者：
Huang, Yong H.;Peddi, Phani K.;Teng, Xinjun
在本文中，我们提出和讨论的结果，从第一个现场演示的混合零价铁（hZVI）技术，用于去除硒（Se），汞（Hg），和硝酸盐的烟气脱硫（FGD）废水的燃煤电厂。通过将零价铁与磁铁矿和Fe（II）物质混合，hZVI技术创造了一种自我维持的高反应性混合物，可以在近中性pH环境中实现各种重金属，含氧阴离子和其他杂质的快速还原，转化，固定和矿化。hZVI技术在电厂30-I流化床系统上进行了为期5周的连续流场试验。原型始终减少汞从约。50至
In this paper, we present and discuss the results from the first field demonstration of the hybrid zero-valent iron (hZVI) technology for removing selenium (Se), mercury (Hg), and nitrate from the flue-gas-desulfurization (FGD) wastewater of a coal-fired power plant. By hybridizing zero-valent iron with magnetite and Fe(II) species, the hZVI technology creates a self-sustaining highly-reactive mixture that can achieve rapid reduction, transformation, immobilization and mineralization of various heavy metals, oxyanions and other impurities from aqueous streams in a near-neutral pH environment. The hZVI technology was demonstrated in a 5-week continuous-flow field test conducted on a 30-I fluidized bed system at a power plant. The prototype consistently reduced Hg from ca. 50 to