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首页> 外文会议>Environmental challenges and solutions to development, production, and use >STUDY OF THE BINDING MECHANISM OF HEAVY METALS BY INACTIVATED TISSUES OF SOLANUM ELAEAGNIFOLIUM
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STUDY OF THE BINDING MECHANISM OF HEAVY METALS BY INACTIVATED TISSUES OF SOLANUM ELAEAGNIFOLIUM

机译：虎杖失活组织对重金属结合机理的研究。

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摘要

Contamination caused by heavy metals has been long known as well as its toxic effects on the environmentrnand mankind. It has also been observed that some native plants have survived within the areas pollutedrnwith heavy metals. This has been the case with the woody subshrub Solanum elaeagnifolium. We can takernadvantage of this singular feature to use its inactivated tissues as a biofiltration system. First, it is necessary torncharacterize the mechanism of the binding between the biomass tissues with heavy metals by using chemicalrnmodification techniques. These techniques include chemical esterification and hydrolyzation of carboxylicrngroups, and methyl esters, respectively. These studies have shown an overall decrease in metal binding forrnesterified biomass, and an overall increase for hydrolyzed biomass as compared to the unmodified biomass.rnThese experiments were performed with Cu(II), Pb(II), Cr(III), Zn(II), and Ni(II). In addition, experiments conductedrnwith modified biomass at different pH conditions were done in order to verify these results. Also, wernused X-ray spectroscopy techniques (XANES and EXAFS) to elucidate the mechanism(s) of metal ion binding.rnFinding the mechanism of the metal binding by the Solanum elaeagnifolium biomass is the basis on which anyrnbioremediation (biofiltration in this case) system should be built.
机译：由重金属引起的污染及其对环境和人类的毒害作用是众所周知的。还已经观察到一些本地植物已经在被重金属污染的区域中存活。木质亚灌木茄茄（Solanum elaeagnifolium）就是这种情况。我们可以利用这种奇异特征的优势，将其失活的组织用作生物过滤系统。首先，有必要通过化学修饰技术来表征生物质组织与重金属之间的结合机理。这些技术分别包括羧基和甲酯的化学酯化和水解。这些研究表明，与未改性的生物质相比，金属结合的被酯化的生物质总体减少，水解的生物质总体增加。这些实验是使用Cu（II），Pb（II），Cr（III），Zn（II）进行的）和Ni（II）。另外，进行了在不同pH条件下用改性生物质进行的实验，以验证这些结果。此外，我们还使用了X射线光谱技术（XANES和EXAFS）来阐明金属离子结合的机理。rn通过发现古兰茄生物量来发现金属结合的机理是任何生物修复（在这种情况下为生物过滤）系统的基础应该建造。

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  • 来源
  • 会议地点 Denver CO(US)
  • 作者

    A.E. Rascon; K.J. Tiemann; K. Dokken; G. Gamez; J.G. Parsons; R. Chianelli; J.L. Gardea-Torresdey;

  • 作者单位

    Department of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968;

    rnDepartment of Chemistry and Environmental Science and Engineering, Ph.D. Program.University of Texas at El Paso, El Paso, TX 79968, Phone: (915) 747-5359, e-mail: jgardea@utep.edu;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;
  • 关键词

    bioremediation; binding mechanism; heavy metals; Solanum;

    机译：生物修复;结合机理;重金属;茄;

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