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首页> 外文期刊>RSC Advances >Adsorption of mercury(II) from water by a novel sPAN fiber containing sulfhydryl, carboxyl and amino groups
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Adsorption of mercury(II) from water by a novel sPAN fiber containing sulfhydryl, carboxyl and amino groups

机译：通过含巯基，羧基和氨基的新型跨度纤维吸附水的汞（II）

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摘要

A novel fiber containing sulfhydryl, carboxyl and amino groups (sPAN) with high adsorption capacity for mercury was facilely prepared by chemically grafting cysteine onto a commercial polyacrylonitrile (PAN) fiber in a one-step reaction. The as-prepared sPAN was characterized for its chemical structure, thermal stability, tensile strength, surface morphology and surface binding species. The adsorption and desorption performances for mercury were investigated by both batch and dynamic experiments. The results showed that sPAN was effective for mercury removal over pH 4-7, and ionic strength produced no obvious interference with the adsorption. The equilibrium adsorption capacity of mercury could be as high as 459.3 (+/- 16.0) mg g(-1), much higher than for most previously reported materials due to the strong interaction between mercury ions and sulfhydryl, carboxyl, amino groups. More than 99% adsorbed mercury could be eluted by the mixture of hydrochloric acid and thiourea, and the regenerated sPAN could be reused for mercury removal with no significant loss of adsorption capacity even after 10 cycles. The dynamic adsorption results indicated that at initial mercury concentrations of 0.1 and 1.0 mg L-1, the residual mercury concentration was less than 1 g L-1, which could meet the criterion for drinking water. Moreover, at an initial mercury concentration of 10 mg L-1, the residual mercury concentration was less than 50 g L-1, which could satisfy the Chinese national industry water discharge standard.
机译：是轻便通过在一步反应化学接枝半胱氨酸到商业聚丙烯腈（PAN）纤维制备的含有巯基，羧基和氨基（SPAN）具有用于汞吸附容量高的新型纤维。所制备的跨距为表征其化学结构，热稳定性，拉伸强度，表面形貌和表面结合的物种。吸附和脱附性能的汞被批量和动态实验研究。结果表明，跨距为有效除汞在pH值4-7，和离子强度产生与吸附没有明显的干扰。汞的平衡吸附量可以是高达459.3（+/- 16.0）毫克克（-1），比大多数以前报道的材料的高得多的因汞离子和硫氢基，羧基，氨基基团之间的强相互作用。 99％以上的吸附的汞可以通过盐酸和硫脲的混合物洗脱，再生钢拱桥可以用于除汞以即使经过10个循环的吸附能力没有损失显著被重用。动态吸附结果表明，在初始汞浓度0.1和1.0mg L-1，残留的汞浓度是低于1g L-1，其能够满足饮用水的标准。此外，以10mg L-1的初始浓度的汞，残留的汞浓度为小于50g L-1，其能够满足中国民族工业水排放标准。

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  • 来源
    《RSC Advances》 |2018年第67期|共11页
  • 作者

    Duan Wenjie; Wang Jing; Chang Li; Zhao Liang; Tian Zhenbang; Huang Zuohua; Huang Weiqing;

  • 作者单位

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

    Chinese Acad Agr Sci Inst Bast Fiber Crops Changsha 410205 Hunan Peoples R China;

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

    Henan Acad Sci Inst Chem Zhengzhou 450002 Henan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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