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首页> 外文期刊>Journal of Environmental Science and Health >Natural clays with an inherent uranium component that nevertheless sequester uranium from contaminated water
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Natural clays with an inherent uranium component that nevertheless sequester uranium from contaminated water

机译：具有固有铀成分的天然粘土，但仍能从受污染的水中隔离铀

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摘要

Clays present a cost effective and sustainable method for removing uranium and heavy metals from drinking water because of their cation exchange capabilities. However, managing muddy suspensions is problematic; therefore, clay pellets as presented in this article are a promising alternative. Three standard clays and two regional clays were evaluated for sorption, both in powder form and in pellet structure for comparison. The objective was to evaluate individual sorption processes and assess the effect on uranium sorption due to the process of altering the clay powder to produce pellets. The sorption capacity of the pellets is sufficiently large to not only sorb the intrinsic non-bonded uranium but to continue to sorb uranium from contaminated water. Furthermore, the uranyl cation was also removed preferentially in the presence of Pb2+ and Cd2+ heavy metal cations, hydronium ions, and more importantly the naturally occurring cations, Na1+, Ca2+, and Mg2+ that occur in abundant concentrations. Clay pellets as well as powders reduced uranium concentrations, and in extreme cases from 450 ppb, 15 times the Environmental Protection Agency maximum contaminant level to non-detectable limits. Clay pellets are excellent candidates for the safe and manageable removal of uranium and heavy metals to produce potable water
机译：粘土由于其阳离子交换能力，为从饮用水中去除铀和重金属提供了一种经济有效的可持续方法。但是，管理泥泞的悬挂是有问题的。因此，本文介绍的粘土颗粒是一种有前途的替代方法。评价了三种标准粘土和两种局部粘土的吸附性，以粉末形式和颗粒结构形式进行比较。目的是评估单个吸附过程，并评估由于改变粘土粉以生产粒料的过程而对铀吸附的影响。粒料的吸附能力足够大，不仅可以吸附固有的未键合铀，而且可以继续从受污染的水中吸附铀。此外，还优先在Pb2 +和Cd2 +重金属阳离子，水合氢根离子（更重要的是天然存在的阳离子，Na1 +，Ca2 +和Mg2 +）的存在下，优先去除铀酰。粘土颗粒和粉末降低了铀的浓度，在极端情况下为450 ppb，是环境保护局最大污染物水平的15倍至不可检测的极限。粘土颗粒是安全，可控地去除铀和重金属以生产饮用水的极佳候选者

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  • 来源
    《Journal of Environmental Science and Health》 |2019年第2期|101-109|共9页
  • 作者

    Lara Antonio; Rivera Emilio; Park Young Ho; Rivera Raul; Fowler Tiffany; Jones Jeremy;

  • 作者单位

    New Mexico State Univ, Chem & Biochem Dept, Las Cruces, NM 88003 USA;

    Vanderbilt Univ, Mass Spectrometry Core Lab, 221 Kirkland Hall, Nashville, TN 37235 USA;

    New Mexico State Univ, Mech & Aerosp Engn Dept, Las Cruces, NM 88003 USA;

    New Mexico State Univ, Chem & Biochem Dept, Las Cruces, NM 88003 USA;

    Washington State Univ, Coll Vet Med, Pullman, WA 99164 USA;

    New Mexico State Univ, Chem & Biochem Dept, Las Cruces, NM 88003 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    clay ceramics; sorption; uranium; intrinsic geologic uranium; water;

    机译：粘土陶瓷;吸附;铀;本征地质铀;水;

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