"Emission Estimations of di(2-ethylhexyl) phthalate (DEHP) in Japan " 

Wataru Naito, Hanako Oyamada, Kikuo Yoshida

National Institute of Advanced Industrial Science and Technology

OECD ENVIRONMENTAL EXPOSURE ASSESSMENT TASK FORCE (Wien, Oesterreich 2004/9/14)

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Abstract

DEHPの詳細リスク評価書の第�V章に基づき作成したOECD環境暴露タスクフォース会合のための報告書。
DEHPの環境中への排出量を推定するための手法，わが国のPRTR制度，PRTRに報告されているDEHPの排出・移動量の解析，製品中からのDEHPの排出量の推定などについて70ページ程度の報告書。

主な結果(英語)：
According to PRTR data in 2001, 392 tons of DEHP were released into the environment during the production of DEHP and during the production and the formulation of flexible polyvinyl chloride (FPVC) products from the business institutions that are required to make PRTR notifications and 99.8% of the reported emissions were released into the air. The PRTR report for 2002 also showed that the quantity of releases outside the scope of PRTR notification was estimated to be 1,180 tons/year. 

The lifetime functions for the DEHP-containing-products were derived using the given average lifetime for the products. The changes in the quantities of the FPVC products in use and the disposal from 1951 to 2001 were estimated using the lifetime functions and the related statistics data. Furthermore, the emission factors were derived considering the thickness and the indoor/outdoor usage ratio for each FPVC product, and then the changes in DEHP releases into the air from 1951 to 2001 were estimated by multiplying the emission factor by the quantities of the FPVC products in use. The total DEHP emissions during the FPVC products in use to the air were, consequently, estimated to be 762 tons/year. 

Moreover, the DEHP emissions to the water from the FPVC products in use and the landfill sites were estimated using the emission factors or the actual measurement. The total DEHP emissions to the water were estimated to be 979〜2,284 tons/year. 

Keywords

Emission　Estimation, PRTR, Di(2-ethylhexyl) phthalate, DEHP, risk assessment