CAREER: Fundamentals of Nanoparticle Behavior in Water Treatment

职业：水处理中纳米粒子行为的基础

• 批准号: 0954130
• 负责人: Sharon Walker
• 金额: $ 40.25万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0954130&HistoricalAwards=false
• 关键词: CAREER; Fundamentals; Nanoparticle; Behavior; Water

Sharon WalkerUniversity of California-RiversideCAREER: Fundamentals of Nanoparticle Behavior in Water TreatmentCBET - 0954130The fate, transport, and toxicity of human engineered nanomaterials released into in the environment, especially into wastewater treatment and surface and groundwater systems is a topic of great societal and scientific importance. The funded project is a systematic investigation of the physicochemical interactions between nanomaterials and the environment. Its goal is to assess the effectiveness of conventional wastewater treatment processes in trapping and/or removing common human-engineered nanoparticles from domestic water supplies. The work involves extensive nanoparticle characterization and transport experiments under environmentally relevant conditions. The behavior and interaction of three categories of nanoparticles will be examined: metal oxides (hematite, titanium oxide, cerium oxide, zinc oxide), metal (gold), and carbon-based (carbon nanotubes). The impact of various coating/capping agents such as Dextran, DMSA, and Polyamiline that are commonly used on these particles will also be examined. Both bare and coated/capped nanoparticles will be tested. Their stability, reactivity, and the effectiveness of removal will be evaluated at each of the four stages of water treatment: coagulation, flocculation, sedimentation, and filtration. Nanomaterial behavior over a wide range of water quality parameters, from simplified electrolytes to complex solution chemistries will be examined. Filtration mechanisms will also be investigated in microscopic and macroscopic flow systems. The impacts of nanoparticle characteristics such as electrophoretic mobility, hydrophobicity, crystalline structure, concentration, and size and shape on the efficiency and effectiveness of wastewater treatment processes will be examined using transmission electron microscopy, UV/Vis, time-resolved dynamic light scattering, fluorescent labeling, magnetic saturation, and other methods. Experiments will take place in packed bed columns and micromodel systems. Broader impacts of the research include improving our knowledge of nanoparticle transport and their trapping and removal from drinking water. The work supports an early career PI whose gender is underrepresented in the sciences and engineering, will engage Hispanic undergraduates from a local community college, and will be incorporated into undergraduate courses. The work will also partner K12 teachers and students at the Riverside Unified School District with university students through the preparation of materials on how to develop science faire projects on water quality.

加利福尼亚 - 里弗里德派培训者的莎朗行能：水处理库中纳米颗粒行为的基本原理-0954130人类工程纳米材料的命运，运输和毒性在环境中释放到环境中，尤其是进入废水处理，水术治疗，表面和地下水和地下水系统是伟大的社会和科学的重要性。 资助的项目是对纳米材料与环境之间物理化学相互作用的系统研究。 它的目标是评估常规废水处理过程在捕获和/或从家庭供水中捕获和/或去除常见的人类工程纳米颗粒的有效性。 这项工作涉及在环境相关条件下进行广泛的纳米颗粒表征和运输实验。 将检查三类纳米颗粒的行为和相互作用：金属氧化物（赤铁矿，氧化钛，氧化钛，氧化锌），金属（金）和碳基（碳纳米管）。 也将检查各种涂层/封盖剂，例如右旋烷，DMSA和多胺的影响，这些涂层在这些颗粒上通常使用。 将测试裸纳米颗粒。 它们的稳定性，反应性和去除的有效性将在水处理的四个阶段中进行评估：凝结，絮凝，沉淀和过滤。 将检查从简化电解质到复杂溶液化学的广泛水质参数的纳米材料行为。过滤机制也将在微观和宏观流动系统中进行研究。 纳米颗粒特性（例如电泳迁移率，疏水性，晶体结构，浓度以及大小和形状对废水处理过程的效率和有效性）的影响，将使用透射电子显微镜，UV/VIS，时间分辨的动态光散射，荧光，荧光标记，磁性饱和效果，磁性饱和度，磁性饱和效果和其他方法。 实验将在包装的床柱和微型模型系统中进行。 该研究的更广泛影响包括提高我们对纳米颗粒运输的了解以及它们从饮用水中捕获和去除。 这项工作支持了早期职业生涯的PI，其性别在科学和工程学中的人数不足，将与当地社区学院的西班牙裔大学生相关，并将纳入本科课程。 这项工作还将通过准备如何开发水质科学项目的材料来与大学生的K12教师和学生与大学生合作。