They observed a decreasing trend for 4‐NP, NP 1‐3 EO, and NP 1 EC after comparing the available historical data, particularly since their stringent regulation in the 1980s, highlighting the effectiveness of regulatory policies in reducing APEOs and their metabolites in sewage sludge. 3.
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A comprehensive review on the sources, environmental behavior, and degradation of alkylphenol ethoxylates and their metabolites in surface water and soils.
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