2020 Volume 76 Issue 2 Pages I_875-I_880
The use of recycling materials in Tokyo Bay was examined for the purpose of reclaiming the aquatic environment. Therefore, a system for verifying the safety and efficiency of recycling materials for utilizing them for the construction of tidal flats and shallow field was developed. The safety verification process was conducted during the mesocosm experiment using the experimental aquarium, based on the concept of the whole effluent toxicity system. In the efficiency validation, seven ecosystem functions defined in tidal flats were scored based on the survey results of the test case with recycling materials and the control case with natural sand, and the functional difference between the test and control cases was quantified through multiple regression analysis. First-stage tests (coal granules and ferronickel slag) and second-stage tests (constructed soil) were conducted to establish the validity of the verification system.
