Identification of out-gases from tsunami-muddy documents and their dealings

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K01141
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Cultural assets study and museology
• Research Institution: Independent Administrative Institution National Institutes for Cultural Heritage Tokyo National Research Institute for Cultural Properties
• Principal Investigator: Sano Chie 独立行政法人国立文化財機構東京文化財研究所, 保存科学研究センター, 部長等 (40215885)
• Research Collaborator: UCHIDA Yuka ; AKANUMA Hideo
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 悪臭 / 津波被災 / 文書 / タンパク質分解 / 汚泥 / 細菌 / 脱塩 / 水浸時間

Outline of Final Research Achievements

Malodorous substances were generated from the documents damaged by the tsunami in 2011 during the stabilization treatment and storage. To improve the treatment process, the water used for treatment was sampled at each step and measured ammonia ion concentration, sulfide ion concentration, chloride ion concentration, pH, bacterial content, and residual protein amount. The malodorous substances were carboxylic acids such as butyric acid, sulfides and ammonia gas.
As the temperature of the water used for the treatment was raised for the purpose of quick desalination, it was found that the temperature favorable for microbial growth lasted 8 hours. The amount of bacteria in the treated water became 100 times to 100000 times after 20 hours immersion. Before cleaning the documents with neutral detergent, soil bacteria were mainly found. After washing, skin resident bacteria accounted for the majority. It was found that most of the salt escaped by dipping in water once.

Free Research Field

文化財保存環境学