...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Management >One-pot green synthesis of polymeric nanocomposite: Biodegradation studies and application in sorption-degradation of organic pollutants
【24h】

One-pot green synthesis of polymeric nanocomposite: Biodegradation studies and application in sorption-degradation of organic pollutants

机译：一锅法聚合纳米复合材料的生物降解研究及其在有机污染物吸附降解中的应用

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

The research work proposes the synthesis of a nanocomposite hydrogel which is a dual combination of binary interpenetrating network (BIPN) and bismuth ferrite nanoparticles. BIPN synthesized from binary graft copolymer (BGC) used as starting material. The cross-linked network of BGC is interpenetrating the newly synthesized cross-linked network of poly(acrylic acid) and the product is named as BIPN. Binary graft copolymer had been synthesized from grafting of guggul aqueous extract with copolymeric chains of acrylamide (primary monomer) and acrylic acid (secondary monomer) crosslinked by N,N'-methylene bisacrylamide (MBA). The maximum percentage swelling was evaluated for BGC through optimization of various reaction parameters: amount of water, binary ratio of acrylamide to acrylic acid, concentrations of MBA, ammonium persulphate, pH, temperature and time. Considering pre-optimized parameters for BGC synthesis, BIPN formation required optimization of only acrylic acid. Maximum percentage swelling obtained was 1497.79% and 308.15% for BGC and BIPN, respectively. Maximum percentage biodegradation of 90.64% and 82.38% were calculated for BGC and BIPN, respectively using composting method. Degradation efficiency of brilliant blue (BB) and fuchsin basic (FB) dyes was in the order: Nanocomposite BIPN BGC. Maximum percentage degradation observed in case of nanocomposite was 94.1% and 99.3% in sunlight for BB and FB, respectively. The interaction of dyes with the nanocomposite involved mainly ionic interactions. The adsorption models Freundlich and Langmuir were applicable to overall adsorption and degradation process of BB and FB, respectively. Maximum adsorption capacities corresponding to minimum concentration i.e. 10 mg L-1 for BB and FB were calculated as 0.409 mg g(-1) and 0.439 mg g(-1), respectively. Second order and first order kinetics were found to be suitable for BB and FB adsorption-degradation pathways, respectively. Intraparticle diffusion mechanism was favorable to both dyes and adsorption followed three steps. Gas chromatography coupled with mass spectrometric analysis could give the degraded products which was helpful in drawing degradation pathway. The degradation process involved active radical species (O-2(-center dot), OH center dot) and they carry out oxidation-reduction reactions on dyes to give decolorized solution containing mineral ions.
机译：研究工作提出了一种纳米复合水凝胶的合成方法，该水凝胶是二元互穿网络（BIPN）和铁酸铋铋的双重组合。由二元接枝共聚物（BGC）合成的BIPN用作原料。 BGC的交联网络正与新合成的聚丙烯酸交联网络互穿，该产品命名为BIPN。通过将古古勒水提取物与通过N，N'-亚甲基双丙烯酰胺（MBA）交联的丙烯酰胺（一级单体）和丙烯酸（二级单体）的共聚链接枝合成二元接枝共聚物。通过优化各种反应参数来评估BGC的最大溶胀百分比：水量，丙烯酰胺与丙烯酸的二元比，MBA浓度，过硫酸铵，pH，温度和时间。考虑到BGC合成的预优化参数，BIPN的形成仅需要丙烯酸的优化。 BGC和BIPN的最大溶胀百分比分别为1497.79％和308.15％。使用堆肥法计算出BGC和BIPN的最大生物降解百分比分别为90.64％和82.38％。亮蓝（BB）和品红碱性（FB）染料的降解效率依次为：纳米复合材料 BIPN> BGC。在纳米复合材料的情况下，BB和FB在阳光下观察到的最大降解百分比分别为94.1％和99.3％。染料与纳米复合材料的相互作用主要涉及离子相互作用。吸附模型Freundlich和Langmuir分别适用于BB和FB的整体吸附和降解过程。对应于最小浓度即BB和FB的10 mg L-1的最大吸附容量分别计算为0.409 mg g（-1）和0.439 mg g（-1）。发现二阶和一阶动力学分别适合于BB和FB吸附-降解途径。颗粒内扩散机理对染料和染料均有利，吸附过程遵循三个步骤。气相色谱与质谱分析联用可得到降解产物，有助于绘制降解途径。降解过程涉及活性自由基种类（O-2（中心点），OH中心点），它们对染料进行氧化还原反应，得到含有矿物质离子的脱色溶液。

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