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首页> 外文期刊>Desalination and water treatment >Biosorption of Pb2+, Cr3+, and Cu2+ by peach palm sheath modified colonized by Agaricus Blazei
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Biosorption of Pb2+, Cr3+, and Cu2+ by peach palm sheath modified colonized by Agaricus Blazei

机译：姬松茸定植的桃皮鞘对Pb2 +，Cr3 +和Cu2 +的生物吸附

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摘要

In this study, the behavior of lead (Pb2+), chromium (Cr3+), and copper (Cu2+) ions in several aqueous solutions during biosorption of peach palm sheath colonized with Agaricus blazei (PS+A. blazei) was evaluated. The modifications of the chemical structure of the biosorbent due to fungal growth were verified by scanning electronic microscopy (SEM) which showed the differences on the material surface. Biosorption of Pb2+ and Cr3+ was dependent of solution pH. Although in natura peach palm sheath and peach palm sheath with A. blazei growth have shown different behaviors in pH evaluations for the three metals, it was chosen to use pH 5.0 in all the other experiments due to the high biosorption values for all metal/biosorbent relations when compared to other pH values. The reaction reached equilibrium in 15min and the pseudo-second-order model presented the best results for all metal/biosorbent interactions. The data for q(max) showed that for all metals PS+A. blazei was better to retain ions when compared to in natura peach palm (PS). Peach palm sheath colonized with A. blazei presented the highest biosorption capacity when interacting with Pb2+ ion (53mgg(-1)). Biosorption isotherms were tested for the mathematical models of Langmuir, Freundlich, Dubinin-Radushkevichs and Temkin, and all of them were adequate for the equilibrium experimental data. The differences of sorption affinity are directly linked to electronegativity difference which also follows this order: Pb2+>Cu2+>Cr3+. Through thermodynamic parameters, it was verified that biosorption processes are spontaneous and exothermal.
机译：在这项研究中，铅（Pb2 +），铬（Cr3 +）和铜（Cu2 +）离子在几种水溶液中吸附姬松茸（PS + A。blazei）定植的桃皮鞘的生物行为进行了评估。通过扫描电子显微镜（SEM）验证了由于真菌生长而引起的生物吸附剂化学结构的改变，该扫描电子显微镜显示了材料表面上的差异。 Pb2 +和Cr3 +的生物吸附取决于溶液的pH值。尽管在natura桃棕榈鞘和带有A. blazei生长的桃棕榈鞘在三种金属的pH评估中表现出不同的行为，但由于所有金属/生物吸附剂的高生物吸附值，在所有其他实验中选择使用pH 5.0与其他pH值比较时的关系。反应在15分钟内达到平衡，拟二阶模型显示了所有金属/生物吸附剂相互作用的最佳结果。 q（max）的数据表明，对于所有金属PS + A。与自然桃棕榈（PS）相比，blazei保留离子更好。当与Pb2 +离子（53mgg（-1））相互作用时，布满A. blazei的桃子棕榈鞘表现出最高的生物吸附能力。对Langmuir，Freundlich，Dubinin-Radushkevichs和Temkin的数学模型进行了生物吸附等温线的测试，所有这些都足以用于平衡实验数据。吸附亲和力的差异与电负性差异直接相关，电负性差异也遵循以下顺序：Pb2 +> Cu2 +> Cr3 +。通过热力学参数，证实了生物吸附过程是自发的和放热的。

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  • 来源
    《Desalination and water treatment》 |2016年第42期|19927-19938|共12页
  • 作者

    Massocatto Cristina L.; de Andrade Mayara; Honorato Andressa C.; Caetano Josiane; Tarley Cesar Ricardo T.; Goncalves Junior Affonso; Colauto Nelson B.; Linde Colauto Giani A.; Dragunski Douglas Cardoso;

  • 作者单位

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil;

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil;

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil;

    Univ Estadual Oeste Parana, UNIOESTE PR, Ctr Engn & Ciencias Exatas, BR-85903000 Toledo, PR, Brazil;

    Univ Estadual Londrina, UEL PR, Dept Quim, Rod Celso Garcia PR 445 Km 380, BR-86051990 Londrina, PR, Brazil;

    Univ Estadual Oeste Parana, UNIOESTE PR, Ctr Ciencias Agr, BR-85605010 Marechal Candido Rodondo, PR, Brazil;

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil;

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil;

    Univ Paranaense, UNIPAR, Diretoria Inst Ciencias Exatas Agr Tecnol & Geoci, Praca Mascarenhas de Moraes, BR-87502210 Umuarama, PR, Brazil|Univ Estadual Oeste Parana, UNIOESTE PR, Ctr Engn & Ciencias Exatas, BR-85903000 Toledo, PR, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Biosorption; Heavy metals; Agaricus blazei; Pewa sheath;

    机译：生物吸附;重金属;姬松茸;皮瓦鞘;

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