Historical Fluxes of Pollutants from Deconvolution of Sedimentary Records

沉积记录反褶积中污染物的历史通量

• 批准号: 8701184
• 负责人: Erik Christensen
• 金额: $ 20.26万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1989-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8701184&HistoricalAwards=false
• 关键词: Historical; Fluxes; Pollutants; Deconvolution; Sedimentary

Sedimentary records of particle.associated pollutants contain valuable informatin on the history of pollution. However, these records are often distorted reflections of past fluxes because of a variety of processes in the sediments such as mixing, biodegradation (organics), radioactive decay (radionuclides), and compaction. This project is aimed at further development of methods for recovery of the historical input record of pollutants from the sedimentary profile. Conveyor.belt transfer, molecular diffusion, and biodegradation of pollutants will be considered, when appropriate. The time domain deconvolution method will be further investigated with regard to uniqueness, optimal choice of time and space intervals, and error measures for deconvolved records. It is also planned to examine an alternative deconvolution method based on inversion in the frequency domain. The developed methods will be applied to literature data and to experimental data for cores from Green Bay and Lake Michigan. Pollutants of interest include lead, zinc, cadmium, polychlorinated biphenyls and polycyclic aromatic hydrocarbons.

颗粒伴生污染物的沉积记录包括 关于污染历史的宝贵信息。 但这些 记录往往是过去通量的扭曲反映， 沉积物中的各种过程，例如混合， 生物降解（有机物），放射性衰变（放射性核素）， 压实 该项目的目的是进一步制定方法， 恢复污染物的历史输入记录， 沉积剖面 输送机.分子传送带 污染物的扩散和生物降解将被考虑， 在适当的时候。 时域反卷积方法将是 进一步研究了关于唯一性，最佳选择， 时间和空间间隔，以及反卷积的误差测量 记录 还计划审查一种替代办法 反褶积方法基于频率域中的反演。 所开发的方法将应用于文献数据和 格林湾和密歇根湖岩芯的实验数据。 感兴趣的污染物包括铅，锌，镉， 多氯联苯和多环芳烃。