Benzene Concentration on Chemical Tankers during Transfer Operations

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  • ケミカルタンカーにおけるベンゼン荷役、輸送中の作業環境濃度について
  • ケミカルタンカー ニ オケル ベンゼン ニエキ ユソウ チュウ ノ サギョウ

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International Maritime Organization (IMO) recognized that chronic exposure to benzene vapors in air may cause leukemia even if the concentration is very low such as a few parts per million. It is necessary to investigate the actual conditions of vapor emission from tankers and concentration on tankers. The purpose of this research is to provide data on benzene concentration from chemical tanker during benzene transfer operations. Measurements of benzene vapor concentration for benzene tankers during loading, unloading, transit and housekeeping operations were made. The tests were conducted during routine operations for typical size of cargoes. The vapor samples were collected in the vapor sample bottle, bag or canister and were subsequently analyzed by gas chromatography. The followings are found. 1)The measured benzene vapor concentrations depend on each phase of the transportation cycle and sampling place. 2)Maximum concentration occurs during housekeeping operation. 3)The benzene concentrations in accommodation are lower than pump room and on deck.

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