OCE-RIG: Investigating the Use of LIBS for In Situ Heavy Metal Analysis in Ocean Sediments

OCE-RIG：研究使用 LIBS 进行海洋沉积物中的原位重金属分析

• 批准号: 1322704
• 负责人: Anna Michel
• 金额: $ 10万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2016-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1322704&HistoricalAwards=false
• 关键词: OCE; RIG; Investigating; Use; LIBS

Overview: Heavy metal contamination in ocean sediments linked to anthropogenic inputs often requires remediation efforts and long term monitoring. Such monitoring is time intensive, requiring sampling, sample processing, and analysis. Developing in situ sensors capable of measuring heavy metals in sediments would enable rapid analysis and large spatial observations. Laser induced-breakdown spectroscopy (LIBS) has the potential to be developed into an in situ sediment sensor for heavy metal analysis. Intellectual Merit: Highly contaminated sediments exist in harbors and coastal environments due to shipping, poor management of waste, and anthropogenic inputs. Because contaminated sediment is detrimental to fisheries, shell fishing, benthic communities and human health, remediation efforts are underway in many areas including New Bedford, MA. Of key concern are high levels of heavy metals. Measurement of heavy metals in sediments is of interest for identifying areas with elevated levels that should be targeted for remediation and for monitoring levels during and after remediation efforts. Large spatial surveys of heavy metal levels in sediments is time intensive due to the current technologies that exist. Sediments must be collected, processed, and analyzed. Laser induced-breakdown spectroscopy (LIBS) can provide rapid, multi-element analysis of samples, is virtually non-destructive, requires no consumables or sample preparation, and can be used in a standoff configuration. Such characteristics are those required for in situ analysis of sediments. In this project, the investigator will conduct laboratory experiments to investigate the potential for using LIBS for in situ sediment analysis. Through the future development of an in situ sensor deployable on an Autonomous Underwater Vehicle or Remotely Operated Vehicle, real-time spatial measurements of sediments will be feasible. Broader Impacts: The investigator aims to increase diversity in ocean sciences by mentoring underrepresented groups and encouraging students to continue to pursue their interests in the field. The investigator will mentor a Summer Minority Undergraduate Fellow in developing his/her own research project related to the LIBS project. The student will gain interdisciplinary experiences in the laboratory and be involved in research day cruises. In an effort to attract and recruit more female students to ocean science, two Saturday outreach events will be developed for female students aged ten to twelve, which will focus on introducing girls to ocean science.

概述：与人为输入相关的海洋沉积物中的重金属污染通常需要补救工作和长期监测。这种监视是时间密集的，需要采样，样品处理和分析。开发能够在沉积物中测量重金属的原位传感器将实现快速分析和大量空间观测。激光诱导的破坏光谱（LIB）有可能发展为原位沉积物传感器进行重金属分析。智力优点：由于运输，废物管理不良和人为意见，港口和沿海环境中存在高度污染的沉积物。由于受污染的沉积物对渔业有害，贝壳捕捞，底栖族社区和人类健康，因此在包括马萨诸塞州新贝德福德在内的许多地区正在进行补救工作。主要关注的是高水平的重金属。对沉积物中的重金属的测量是识别具有升高水平的区域的感兴趣，该区域应针对补救措施，并在补救工作期间和之后进行监测水平。由于目前存在的技术，沉积物中重金属水平的大量空间调查是时间密集的。必须收集，处理和分析沉积物。激光诱导的损坏光谱（LIB）可以提供样品的快速，多元素分析，几乎无损，不需要消耗品或样品制备，并且可以用于对峙配置。这种特征是沉积物原位分析所需的特征。在该项目中，研究人员将进行实验室实验，以调查使用LIB进行原位沉积物分析的潜力。通过将未来的原位传感器开发在自动水下车辆或远程操作的车辆上，实时空间测量是可行的。更广泛的影响：调查人员的目标是通过指导代表性不足的群体并鼓励学生继续追求该领域的利益来提高海洋科学的多样性。调查人员将指导一个夏季少数族裔本科生，以开发自己/她自己的研究项目与LIBS项目有关。该学生将获得实验室的跨学科经验，并参与研究日巡游。为了吸引和招募更多的女学生进入海洋科学，将为十到十二岁的女学生开发两个星期六的外展活动，这将着重于将女孩介绍给海洋科学。