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Studies of benzidine‐based dyes in sediment‐water systems
Author(s) -
Weber Eric J.
Publication year - 1991
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.5620100507
Subject(s) - benzidine , sorption , sediment , chemistry , environmental chemistry , degradation (telecommunications) , salt (chemistry) , kinetics , nuclear chemistry , organic chemistry , geology , adsorption , paleontology , telecommunications , physics , quantum mechanics , computer science
The sorption and degradation of several benzidine‐based dyes were studied in sedimentwater systems. Studies in resaturated sediment demonstrated that sorption was strongly dependent on pH and the nature and concentration of the inorganic salt in solution. Degradation of the dyes in anaerobic pond sediment followed pseudo‐first‐order kinetics with half‐lives ranging from 2 to 16 d. Product studies indicated that the amount of recovered benzidine accounted for only 2 to 5% of lost Direct Red 28. Studies in pH‐amended pond sediment demonstrated that degradation is inhibited when the dyes are strongly sorbed to the sediment.