SORPTION AND BIODEGRADATION OF PHARMACUETICAL COMPOUNDS IN BIOLOGICAL SYSTEMS

生物系统中药物化合物的吸附和生物降解

• 批准号: 7956322
• 负责人: Willie Frank Harper
• 金额: $ 0.08万
• 依托单位: CARNEGIE-MELLON UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7956322
• 关键词: Affect; Biodegradation; Biological; Biomass; Biomedical Research; Bioreactors; Computational Technique; Computer Retrieval of Information on Scientific Projects Database; Computer software; Data; Diffusion; Entropy; Environmental sludge; Funding; Grant; High Performance Computing; Institution; Location; Mediating; Particle Size; Research; Research Personnel; Resources; Source; Surface; Thermodynamics; United States National Institutes of Health; Water; biological systems; design; electron density; frontier; oxidation; particle; quantum chemistry; water quality

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The expected results have potential to make fundamental scientific contributions, while also making direct connections to design and operating strategies for water quality professionals. The research uses basic scientific concepts from quantum chemistry and thermodynamics, and the experimental tasks utilize modern analytical techniques and computational software. The four key research hypotheses are: 1) The biological oxidation of PhACs and their metabolites will occur at the location where the frontier electron density (FED) is highest. FED may be established as an organizing principle for predicting biologically-mediated PhAC transformation. These results may impact the understanding of PhAC mass transport in bioreactors, surface waters, and sediments. 2) PhAC sorption is entropy-driven, endothermic, and diffusion-controlled. Establishing the thermodynamic baseline for PhAC sorption to activated sludge biomass will help to understand available data in a meaningful way. 3) Sorption hysteresis is more pronounced as the particle size distribution shifts toward larger sizes. The results could produce a fundamental understanding for how sorption hysteresis is affected by activated sludge particle size. 4) PhACs or their metabolites located within the interior of larger floc particles are more persistent. When both biodegradation and sorption occur simultaneously, PhACs and their metabolites may become trapped within the interior of activated sludge floc particles, where biological activity is lower.

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 预期的结果有可能作出基本的科学贡献，同时也使水质专业人员的设计和运营策略的直接连接。该研究使用量子化学和热力学的基本科学概念，实验任务利用现代分析技术和计算软件。四个关键的研究假设是：1）PhAC及其代谢产物的生物氧化将发生在前线电子密度（FED）最高的位置。FED可以被建立为用于预测生物介导的PhAC转化的组织原则。这些结果可能会影响的理解PhAC在生物反应器，表面沃茨，和沉积物中的质量传输。2)PhAC吸附是熵驱动、吸热和扩散控制的。建立活性污泥生物质吸附PhAC的热力学基线将有助于以有意义的方式理解现有数据。3)随着颗粒尺寸分布向更大尺寸转变，吸附滞后更明显。结果可以产生一个基本的理解吸附滞后是如何影响活性污泥颗粒大小。4)PhAC或其代谢物位于较大的絮凝物颗粒的内部更持久。当生物降解和吸附同时发生时，PhAC及其代谢物可能被困在活性污泥絮凝颗粒内部，生物活性较低。