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首页> 外文期刊>RSC Advances >Uptake of heavy metal ions from aqueous media by hydrogels and their conversion to nanoparticles for generation of a catalyst system: two-fold application study
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Uptake of heavy metal ions from aqueous media by hydrogels and their conversion to nanoparticles for generation of a catalyst system: two-fold application study

机译：通过水凝胶从水介质中吸收重金属离子及其转化为纳米颗粒的转化催化剂系统：两倍的应用研究

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摘要

Poly(methacrylic acid) (P(MAA)), poly(acrylamide) (P(AAm)) and poly(3-acrylamidopropyltrimethyl ammonium chloride) (P(APTMACl)) were synthesized as anionic, neutral and cationic hydrogels, respectively. The synthesized hydrogels have the ability to be used as absorbents for the removal of selected heavy metal ions such as Cu2+, Co2+, Ni2+ and Zn2+ from aqueous media. Absorption studies revealed that the absorption of metal ions by the hydrogels followed the order Cu2+ Ni2+ Co2+ Zn2+. For the mechanism of absorption, both Freundlich and Langmuir absorption isotherms were applied. Metal ion entrapped hydrogels were treated using an in situ chemical reduction method in order to convert the metal ions into metal nanoparticles for the synthesis of hybrid hydrogels. The synthesis and morphology were confirmed using FT-IR and SEM, while the absorbed metal amounts were measured using TGA and AAS. The hybrid hydrogels were further used as catalysts for the reduction of macro (methylene blue, methyl orange and congo red) and micro (4-nitrophenol and nitrobenzene) pollutants from the aqueous environment. The catalytic performance and re-usability of the hybrid hydrogels were successfully investigated.
机译：聚（甲基丙烯酸）（P（MAA）），聚（丙烯酰胺）（P（AAM））和聚（3-丙酰胺酰胺丙基三氯化铵）（P（ApTmacl））分别作为阴离子，中性和阳离子水凝胶合成。合成的水凝胶能够用作吸收剂，用于从含水介质中除去所选择的重金属离子，例如Cu 2 +，CO 2 +，Ni2 +和Zn2 +。吸收研究表明，水凝胶的吸收金属离子遵循顺序Cu2 +＆ Ni2 +＆ CO2 +＆ Zn2 +。对于吸收机制，施加Freundlich和Langmuir吸收等温线。使用原位化学还原方法处理金属离子夹带水凝胶，以将金属离子转化为金属纳米粒子以合成杂种水凝胶。使用FT-IR和SEM确认合成和形态，而使用TGA和AAS测量吸收的金属量。杂合水凝胶进一步用作从含水环境中还原宏（亚甲基蓝，甲基橙色和刚果红色）和微（4-硝基苯酚和硝基苯）污染物的催化剂。成功研究了杂合水凝胶的催化性能和可重量性。

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  • 来源
    《RSC Advances》 |2018年第27期|共11页
  • 作者

    Javed Rida; Shah Luqman Ali; Sayed Murtaza; Khan Muhammad Saleem;

  • 作者单位

    Univ Peshawar Natl Ctr Excellence Phys Chem Peshawar 25120 Pakistan;

    Univ Peshawar Natl Ctr Excellence Phys Chem Peshawar 25120 Pakistan;

    Univ Peshawar Natl Ctr Excellence Phys Chem Peshawar 25120 Pakistan;

    Univ Peshawar Natl Ctr Excellence Phys Chem Peshawar 25120 Pakistan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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