• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Dye-affinity microbeads for removal of phenols and nitrophenols from aquatic systems
【24h】

Dye-affinity microbeads for removal of phenols and nitrophenols from aquatic systems

机译：染料亲和微珠，可从水生系统中去除酚和硝基酚

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Alkali Blue 6B attached poly(2-hydroxyethyl methacrylate) (PHEMA) microbeads were investigated as dye-affinity adsorbents for the removal of phenol and nitrophenols (i.e., 2-nitrophenol, 4-nitrophenol, and 2,4-dinitrophenol) from aqueous solutions. PHEMA microbeads were prepared by radical-suspension polymerization of HEMA in the presence of azobisisobutyronitrile as the initiator. These microbeads with a swelling ratio of 55% and carrying 23.6 mumol Alkali Blue 6B/g polymer were then used in the removal of phenol and nitrophenols from aqueous media. The adsorption was fast in all cases (20-min equilibrium time). The maximum adsorptions of phenols onto the microbeads carrying Alkali Blue 6B were 145.2 mumol/g for phenol, 87.8 mumol/g for 2,4-dinitrophenol, 112.6 mumol/g for 4-nitrophenol, and 104.3 mumol/g for 2-nitrophenol. The affinity order was phenol > 4-nitrophenol > 2-nitrophenol > 2,4-dinitrophenol. The adsorption of nitrophenols decreased with increasing pH. Desorption of nitrophenols was achieved using a 30% (v/v) methanol solution. The microbeads carrying Alkali Blue 6B are suitable for repeated use for more than five cycles without a noticeable loss of adsorption capacity. (C) 2002 John Wiley Sons, Inc. [References: 30]
机译：研究了与碱蓝6B相连的聚甲基丙烯酸2-羟乙酯（PHEMA）微珠作为染料亲和吸附剂的作用，用于从水溶液中去除苯酚和硝基苯酚（即2-硝基苯酚，4-硝基苯酚和2,4-二硝基苯酚） 。在偶氮二异丁腈为引发剂的条件下，通过HEMA自由基悬浮聚合制备PHEMA微珠。然后将这些具有55％溶胀率并带有23.6μmol碱蓝6B / g聚合物的微珠用于从水性介质中去除酚和硝基酚。在所有情况下（20分钟平衡时间），吸附速度都很快。苯酚在带有碱蓝6B的微珠上的最大吸附量为：苯酚为145.2摩尔/克，2,4-二硝基苯酚为87.8摩尔/克，4-硝基苯酚为112.6摩尔/克，2-硝基苯酚为104.3摩尔/克。亲和力顺序为苯酚> 4-硝基苯酚> 2-硝基苯酚> 2,4-二硝基苯酚。硝基酚的吸附随着pH值的增加而降低。使用30％（v / v）的甲醇溶液可实现硝基苯酚的解吸。带有碱蓝6B的微珠适合重复使用超过五个循环，而吸附能力没有明显下降。 （C）2002 John Wiley Sons，Inc. [参考：30]

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