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首页> 外文期刊>RSC Advances >The removal of heavy metal ions from wastewater/aqueous solution using polypyrrole-based adsorbents: a review
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The removal of heavy metal ions from wastewater/aqueous solution using polypyrrole-based adsorbents: a review

机译：使用基于聚吡咯的吸附剂从废水/水溶液中除去重金属离子：综述

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摘要

Water pollution caused by heavy metal ions is becoming a serious threat to human and aquatic lives day by day. Therefore, the treatment of heavy metal ions is of special concern for environmental scientists and engineers. Historically, various methods, such as physical and chemical precipitation, ion-exchange, reverse osmosis, membrane filtration, electrochemical treatment, solvent extraction, and adsorption, have been widely studied for the removal of these metal ions from aqueous/wastewater. However, over the past few decades, conducting polymer-based adsorbents have received considerable attention owing to their potential applications for different heavy metal ions especially Cr(VI), Zn(II), and Pb(II). Among the various conducting polymers, polypyrrole (PPy) based adsorbents play a major role for the removal of various heavy metal ions due to their ease of synthesis, biocompatibility and redox properties. The current review has mainly focused on the physico-chemical properties, adsorption characteristics and mechanism of different polypyrrole-based adsorbents, including PPy/biosorbents, PPy/Fe3O4 nanocomposites, PPy-polyaniline nanofibers, PPy-graphene nanocomposites, exfoliated PPy-organically modified clay nanocomposites, and hierarchical porous PPy-nanoclusters, as well as their applications towards the removal of heavy metal ions.
机译：由重金属离子引起的水污染正在日复一日地对人类和水生的严重威胁。因此，对重金属离子的治疗对于环境科学家和工程师来说是特别关注的。从历史上看，已经广泛研究了各种方法，例如物理和化学沉淀，离子交换，反渗透，膜过滤，电化学处理，溶剂萃取和吸附，用于从含水/废水中除去这些金属离子。然而，在过去的几十年中，由于它们对不同重金属离子尤其是Cr（VI），Zn（II）和Pb（II），因此导致基于聚合物的吸附剂的潜在应用受到了相当大的关注。在各种导电聚合物中，基于聚吡咯（PPY）的吸附剂在其易于合成，生物相容性和氧化还原性能的情况下发挥了各种重金属离子的主要作用。目前的评论主要集中在不同聚吡咯基吸附剂的物理化学性质，吸附特性和机制，包括PPY / Biosorbents，PPY / Fe3O4纳米复合材料，PPY-聚苯胺纳米纤维，PPY-石墨烯纳米复合材料，剥落的PPY组合改性粘土纳米复合材料，以及分层多孔PPY纳米团簇，以及它们朝向重质金属离子的应用。

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