硫化纳米零价铁去除水体污染物的研究进展

发布时间：2018-02-26 09:48

本文关键词： 纳米零价铁硫化作用水环境有机污染物重金属污染反应机制　出处：《化学学报》2017年06期 　论文类型：期刊论文

【摘要】：纳米零价铁(NZVI)作为一种原料来源广泛的环境污染修复剂,被广泛应用于地下水和废水等水环境污染修复领域中.尽管这种材料具有反应活性优异、成本低和毒性低的特点,但又面临着自身性质带来的在原位修复和储存等方面的局限.在提高其在水环境中的实际应用潜力的改性方法中,硫化作用成为近10年来的一个研究热点,这也意味着NZVI改性的研究重点从提高NZVI反应活性转移到提高电子的选择性上.硫化型NZVI的制备方法各异,制备方法主要为化学法.这些硫化型材料被大量应用于水体有机污染物降解和重金属去除的研究中来考察它们的实际反应活性,其与水体污染物在不同环境体系下的反应机制也被深入研究.其中,根据硫化型NZVI降解污染物种类和反应条件的不同,大致可以分为吸附、还原和氧化这三大类.尽管目前硫化型NZVI的实际应用仍面临着较多的局限,但是在提高反应活性和电子选择性等方面突破巨大.深入地梳理硫化型NZVI的反应性能和其去除水体中污染物的反应机制的研究进展能够为未来硫化型NZVI的研究指明发展方向.由于硫化型零价铁的优异性能,该材料和相关的硫化铁系材料将会逐步成为环境修复领域的重要材料分支,具有潜在的发展前景.
[Abstract]:NZVI is widely used as an environmental remediation agent with a wide range of feedstock sources in the field of water pollution remediation, such as groundwater and wastewater, despite its excellent reactivity, low cost and low toxicity. However, it is faced with the limitations of its own properties in in-situ repair and storage. In the modification methods to improve its practical application potential in water environment, vulcanization has become a research hotspot in the last 10 years. This also means that the focus of NZVI modification is shifted from increasing the activity of NZVI reaction to increasing the selectivity of electrons. The preparation methods of vulcanized NZVI are different. These vulcanized materials have been widely used in the study of degradation of organic pollutants and removal of heavy metals in water to investigate their actual reaction activity. The mechanism of its reaction with water pollutants in different environmental systems has also been deeply studied. Among them, according to the different types and reaction conditions of sulfide NZVI degradation pollutants, it can be roughly divided into adsorption, Although the practical application of vulcanized NZVI is still faced with many limitations, However, great breakthroughs have been made in improving the reaction activity and electron selectivity. A thorough study on the reaction performance of vulcanized NZVI and the mechanism of its removal of pollutants in water can serve as a reference for the future study of vulcanized NZVI. Due to the excellent properties of vulcanized zero-valent iron, This material and related iron sulfide materials will gradually become an important branch in the field of environmental remediation, and will have a potential development prospect.
【作者单位】：湖南大学环境科学与工程学院;湖南大学环境生物学与污染控制教育部重点实验室;
【基金】：国家自然科学基金(Nos.51579096,51222805,51521006,51508175) “万人计划”青年拔尖人才支持计划(2012)资助~~
【分类号】：TB383.1;X52

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