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The effect of water chemistry on the properties of iron particles and aqueous iron suspensions derived from the oxidation of iron(II).

机译：水化学性质对铁（II）氧化衍生的铁颗粒和水性铁悬浮液性能的影响。

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摘要

The properties of iron particles and colloids are important in understanding the properties of iron corrosion scale and deposits, iron release mechanisms, the stability and mobility of iron particles in water, and the color and turbidity of aqueous iron suspensions. Their properties are also important in source water iron removal effectiveness, particle deposition rates, and the transport of adsorbed contaminants such as organic matter, e.g., organics, heavy metals, and microorganisms, through aqueous systems. Numerous research reports have been published on iron in the areas of iron chemistry, corrosion, mineralogy, and limnology. Despite an overwhelming abundance of available information, iron control and water discoloration in drinking water systems remain poorly understood. In addition, very little practical information on iron removal processes and the removal of contaminants such as arsenic during iron removal that considers the role of iron particle properties is available. The objective of this research was to study the properties of iron colloidal particles and aggregates synthesized from the oxidation of Fe(II) by oxygen and the properties of the resulting aqueous iron suspensions. Particle properties including size, morphology, mineralogy, adsorptive characteristics, and electrostatic charge were examined. Suspension color (apparent and true), turbidity, and particle stability were monitored. The impact of water quality including pH, dissolved inorganic carbon (DIC), silicate, orthophosphate, and several polyphosphate formulations on particle and suspension properties and water quality was evaluated. Finally the adsorptive properties of iron particles formed under different conditions toward phosphate and arsenic were considered. The experimental findings of this study will improve our understanding of iron release from distribution system materials, improve source water iron treatment processes, provide a scientific-basis for using "sequesterants" and corrosion inhibitors, improve the ability to reduce red water discoloration, and improve our ability to remove iron and arsenic from source waters.
机译：铁颗粒和胶体的特性对于理解铁的腐蚀垢和沉积物的特性，铁的释放机理，铁颗粒在水中的稳定性和迁移率以及水性铁悬浮液的颜色和浊度非常重要。它们的性质对于去除水源铁的有效性，颗粒沉积速率以及被吸附的污染物（例如有机物，例如有机物，重金属和微生物）通过水系统的传输也很重要。关于铁的许多研究报告已在铁化学，腐蚀，矿物学和石灰学领域发表。尽管有大量可用信息，但对饮用水系统中的铁控制和水变色的了解仍然很少。另外，关于铁去除过程以及去除铁的过程中考虑到铁颗粒性质的作用的诸如砷等污染物的实用信息很少。这项研究的目的是研究由氧氧化Fe（II）合成的铁胶体颗粒和聚集体的性质，以及所得的水性铁悬浮液的性质。检查了颗粒性质，包括大小，形态，矿物学，吸附特性和静电荷。监测悬浮液的颜色（表观和真实），浊度和颗粒稳定性。评估了水质（包括pH值，溶解的无机碳（DIC），硅酸盐，正磷酸盐和几种多磷酸盐制剂）对颗粒和悬浮液性质以及水质的影响。最后考虑了在不同条件下形成的铁颗粒对磷酸盐和砷的吸附性能。这项研究的实验结果将增进我们对配电系统材料中铁释放的理解，改善水源水的铁处理工艺，为使用“螯合剂”和腐蚀抑制剂提供科学依据，提高减少红水变色的能力，并改善我们从水源中去除铁和砷的能力。

著录项

  • 作者

    Lytle, Darren A.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 278 p.
  • 总页数 278
  • 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

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