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Behavior of [ 14 c]‐4‐nitrophenol and [ 14 c]‐3,4‐dichloroaniline in lab sediment‐water systems. 1. Metabolic fate and partitioning of radioactivity
Author(s) -
Heim Kerstin,
Schuphan Ingolf,
Schmidt Burkhard
Publication year - 1994
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620130606
Subject(s) - sediment , environmental chemistry , humin , chemistry , mineralization (soil science) , nitrophenol , incubation , humic acid , geology , organic chemistry , paleontology , fertilizer , biochemistry , nitrogen , catalysis
Abstract Using a standard screening procedure, the fate of [ 14 C]‐4‐nitrophenol and [ 14 C]‐3,4‐dichloroamline was studied in lab sediment‐water systems; incubation intervals ranged from 4 h to 90 d. The sediments were collected from a creek, a pond, and a drainage ditch of a fruit‐growing plantation, and were characterized. Both compounds and their transformation products were sorbed to the sediments in large quantities; radioactivity left in the water phase was below 11 % after termination of the experiments. Besides minor amounts of 14 CO 2 , 3,4‐dichloroaniline was converted to predominantly nonextractable residues, presumably without preceding microbial transformation of the 3,4‐dichloroaniline moiety. Two main end products were observed in the 4‐nitrophenol experiments, namely nonextractable residues and 14 CO 2 . Data obtained from the sediment exhibiting highest microbial activity probably indicated a further mineralization of 4‐nitrophenol‐derived sediment‐bound residues. On the whole, 4‐nitrophenol presumably shows low persistence and accumulation in sediment‐water systems, whereas due to its stability the toxicity of sediment‐sorbed 3,4‐dichloroaniline should be examined.