Like-Charge Electrostatic Attraction of Colloids in Aquatic Systems

水生系统中胶体的同电荷静电吸引

• 批准号: 0651683
• 负责人: Sotira Yiacoumi
• 金额: $ 27.5万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0651683&HistoricalAwards=false
• 关键词: Like; Charge; Electrostatic; Attraction; Colloids

ABSTRACTCBET-0651683Sotira Yiacoumi Georgia TechLike-Charge Electrostatic Attraction of Colloids in Aquatic SystemsThis project will combine molecular modeling, computational approaches, and modern experimental methods to elucidate the mechanisms of like-charge attraction of colloids in aquatic systems. Monte Carlo techniques will be used to study thermodynamic equilibrium at the molecular scale and investigate the structure of interacting electrical double layers of approaching charged surfaces. Neutron reflectometry measurements will provide direct information on the electrical double layer structure near a charged surface and atomic force microscopy will be used to measure interaction forces between a colloidal particles and planar surfaces. The proposed work has implications in many areas of environmental and chemical engineering, including chemical separation and purification, water and wastewater treatment, particle transport in ground-water, and aspects of nanotechnology. Aggregation and filtration of harmful colloidal particles suspended in water are fundamental processes found in nearly all water treatment facilities. The research results will be incorporated into courses on molecular modeling and correspondence courses offered to practicing engineers and scientists.

Sotira Yiacoumi格鲁吉亚技术类电荷静电吸引的胶体在水生系统中该项目将联合收割机分子模拟，计算方法，和现代实验方法来阐明类电荷吸引的胶体在水生系统中的机制。蒙特卡罗技术将被用来研究在分子尺度上的热力学平衡，并调查接近带电表面的相互作用的双电层的结构。中子反射测量将提供带电表面附近的双电层结构的直接信息，原子力显微镜将用于测量胶体颗粒和平面表面之间的相互作用力。拟议的工作在环境和化学工程的许多领域，包括化学分离和净化，水和废水处理，地下水中的颗粒运输，以及纳米技术的各个方面都有影响。悬浮在水中的有害胶体颗粒的聚集和过滤是几乎所有水处理设施中发现的基本过程。研究结果将纳入为执业工程师和科学家提供的分子建模课程和函授课程。