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首页> 外文期刊>Environmental Science & Technology >Comment on 'Puffed Rice Carbon with Coupled Sulfur and Metal Iron for High-Efficiency Mercury Removal in Aqueous Solution'
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Comment on 'Puffed Rice Carbon with Coupled Sulfur and Metal Iron for High-Efficiency Mercury Removal in Aqueous Solution'

机译：评论“膨化米碳，含硫磺和金属铁用于水溶液中的高效汞去除”

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Recently, Fang and co-workers developed a new PRC/ Fe@S composite and applied it for removal of mercury Hg(Ⅱ) from water (demoted as the original paper). The adsorption-coupled reduction played an important role in the adsorption process of Hg(Ⅱ) onto PRC/Fe@S. As reported by the original authors, the Hg(Ⅱ) was reduced to Hg(0) when it contacted with Fe(0) on the surface of PRC/Fe@S. The reduced Hg(0) was mainly adsorbed by PRC/Fe@S through the sulfur element on the surface of PRC/Fe@S. However, there are still some essential problems that need to be further discussed. First, there are not any experimental data related to the electrical state of PRC/Fe@S-10 (i.e., pH_(PZC) or pH_(IEP)) provided by the authors. However, the authors drew a doubtful conclusion as follows: "at 2 ＜ pH ＜ 5, the surface of the PRC/ Fe@S-10 absorbent is surrounded by positive charges attributed to the presence of numerous H~+ ions that compete with Hg(Ⅱ) in the adsorption process". The data of pH_(PZC) or pH_(IEP) of PRC/Fe@S-10 should be additionally provided to verify such discussion.
机译：最近，方和同事开发了一种新的PRC / FE @ S复合材料，并将其应用于从水中除去汞汞（Ⅱ）（降级为原纸）。吸附耦合耦合还原在HG（Ⅱ）的吸附过程中在PRC / FE @ S中发挥了重要作用。如原作者所报道的，当它在PRC / FE @ S表面接触时，HG（Ⅱ）减少到Hg（0）。降低的Hg（0）主要通过PRC / FE @ S通过PRC / FE @ S表面上的硫元素吸附。但是，仍然需要进一步讨论的一些基本问题。首先，没有与作者提供的PRC / FE @ S-10电气状态有关的任何实验数据（即ph_（PH_（PH_（PH_（PH_（PH_）或PH_（IEP））。然而，作者将令人疑问地结束如下：“在2 H <5时，PRC / FE @ S-10吸收剂的表面被归因于与HG竞争的许多H〜+离子的存在归因于阳性电荷（Ⅱ）在吸附过程中“。应另外提供PRC / FE @ S-10的pH_（PZC）或PH_（IEP）以验证此类讨论。

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  • 来源
    《Environmental Science & Technology》 |2020年第12期|7725-7726|共2页
  • 作者

    Hai Nguyen Tran;

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  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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