• 主题
高级搜索  >
历史搜索 清空历史
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
【24h】

Adsorption of mercury(ii) from water by a novel sPAN fiber containing sulfhydryl, carboxyl and amino groups

机译：一种新型的含巯基，羧基和氨基的sPAN纤维从水中吸附汞（ii）

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

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 μg 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 μg L ~(?1) , which could satisfy the Chinese national industry water discharge standard.
机译：通过将半胱氨酸一步一步化学接枝到商业聚丙烯腈（PAN）纤维上，可以轻松地制备出一种新型的含有巯基，羧基和氨基（sPAN）的纤维，该纤维对汞的吸附能力很高。所制备的sPAN具有化学结构，热稳定性，抗张强度，表面形态和表面结合物种的特征。通过分批和动态实验研究了汞的吸附和解吸性能。结果表明，sPAN在pH值为4-7时能有效去除汞，并且离子强度对吸附没有明显影响。汞的平衡吸附容量可能高达459.3（±16.0）mg g〜（？1），由于汞离子与巯基，羧基，氨基之间的强相互作用，因此比大多数以前报道的材料要高得多。盐酸和硫脲的混合物可以洗脱出超过99％的吸附汞，并且再生的sPAN可以重新用于除汞，即使经过10个循环也不会造成明显的吸附能力损失。动态吸附结果表明，在初始汞浓度为0.1和1.0 mg L〜（？1）时，残留汞浓度小于1μgL〜（？1），可以满足饮用水标准。此外，在初始汞浓度为10 mg L〜（？1）时，残留汞浓度小于50μgL〜（？1），可以满足中国国家工业用水排放标准。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号