Reduced Phosphorus in the Environment and Its Role in Anaerobic Iron Corrosion

环境中的还原磷及其在厌氧铁腐蚀中的作用

• 批准号: 0201849
• 负责人: Marc Edwards
• 金额: $ 34.36万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0201849&HistoricalAwards=false
• 关键词: Reduced; Phosphorus; Environment; Its; Role

0201949 Edwards Catastrophic iron corrosion sometimes occurs in the presence of SRB with profound consequences. A theory of SRB induced iron corrosion is proposed based on the observations that reduced phosphorus species such as phosphine (PH3) can catalyze the rate limiting reaction in iron corrosion, and that phosphates added to iron metal or drinking water as corrosion inhibitors can serve as the source of catalyst in the presence of sulfides.Three phases of experimental work are planned to examine aspects of reduced phosphorus species chemistry. This includes 1) development of analytical protocols and a survey of reduced P occurrence, 2) examination of the aqueous chemistry of reduced P and pathways leading to its production, and 3) defining the role of reduced phisphorus in iron corrosion.This research, although fundamental, has important applications to the engineering community. The investigators note that there is ample evidence supporting the idea that reduced phosphorus could catalyze iron corrosion under conditions present in water distribution systems. Therefore, where these forms of phosphorus are present, there can be high costs associated with pipe replacement.

0201949 Edwards灾难性的铁腐蚀有时会在SRB存在下发生，并产生深远的后果。 提出了SRB诱导的铁腐蚀的理论，基于观察结果，即减少磷酸（PH3）可以催化速率限制铁腐蚀中的速率限制反应，而将磷酸盐添加到铁金属或饮用水中作为腐蚀抑制剂可以作为硫化物的催化剂的催化剂的来源。 这包括1）开发分析方案的开发和对P的减少的调查，2）检查降低的P和导致其生产的途径的水性化学的检查； 3）定义降低的菲氏菌在铁腐蚀中的作用。这项研究虽然基本上对工程社区具有重要的应用。 研究人员指出，有足够的证据支持这样的想法，即减少磷可以在水分配系统中存在的条件下催化铁腐蚀。 因此，在存在这些形式的磷，可以与管道置换相关的高成本。