"Risk and Exposure Assessment of Nonylphenols and thier Related Compounds" 

Yuriko Ishikawa, Akihiro Tokai, Lin Bin-Le, Ken-ichi Miyamoto, Junko Nakanishi

National Institute of Advanced Industrial Science and Technology

Society for Risk Analysis, Annual Meeting  (New Orleans, USA 2002/12/10)

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Abstract

In this study, we employed some statistical approaches to quantify a typical probabilistic distribution as the predicted environmental concentrations (PEC) of NP, its final degradation products of NPE, on the assumption that the variability of aquatic concentrations of NP depends on the emissions of NPE and the environmental variables such as flow rate of the rivers examined. 

We concluded that the NP concentrations in the water environment in Japan have been obviously decreasing for the period of 1998 and 2000 and discussed here the causes of these decreases in the concentrations.The emission amounts of NPE for the use of domestic and industrial use are getting drastically low by voluntary action taken by industrial sectors in Japan. 

Since the current or future emissions of NP are decreasing gradually and hardly expected to cause any serious hazardous effects, we then clarify risk-benefit perspective of the following measures; alternative substances, reinforcement of industrial waste water treatment, reinforcement of sewerage treatment plant.

Keywords

nonylphenol, nonylphenol polyethoxylates, PEC, exposure analysis, risk reduction measures