20.99 Sep 25, 2026
ISO
ISO/TC 281
International Standard
This document specifies a test method to evaluate the effectiveness of removing nitrogen and phosphorus from sediments through washing using fine bubble technology. It is applicable to freshwater and estuarine environments where sediment-bound nutrients cause water quality degradation.
PROJECT
ISO/WD 4240-6
20.99
WD approved for registration as CD
Sep 25, 2026