The effect of oxidative coloration on the methanogenic toxicity and anaerobic biodegradability of phenols

James A Field, G. Lettinga

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Phenolic compounds are often present in agricultural wastewater intended for anaerobic treatment. During industrial processing, storage or wastewater pretreatments, these compounds are susceptible to oxidative modifications leading to the formation of colored oxidized products. In this study, the role of the oxidative coloration on changing the methanogenic toxicity and anaerobic biodegradability of phenolic compounds was examined. Short exposures to air increased the methanogenic toxicity of monomeric phenols provided these compounds had neighboring hydroxyl groups, necessary for the coloration, and if their oxidized products lacked free carboxylic-acid groups. In contrast, a methanogenic toxic tannin, gallotannic acid (oligomeric), was detoxified by oxidative coloration. The extensive oxidation of a monomer, l-dopa, produced a dark-colored precipitate which was non-toxic. These results indicated that the initial products of the oxidation of monomers are toxic whereas highly polymerized products are non-toxic. The colorless phenolic compounds tested in this study were either partially or fully degraded (with the exception of catechol). The trihydroxyphenols were the most readily biodegradable compounds. The oxidized solutions of trihydroxyphenols were less biodegradable in proportion to their color.

Original languageEnglish (US)
Pages (from-to)161-179
Number of pages19
JournalBiological Wastes
Volume29
Issue number3
DOIs
StatePublished - 1989
Externally publishedYes

Fingerprint

Poisons
Phenols
Biodegradability
Toxicity
phenol
Wastewater
phenolic compound
Monomers
toxicity
Tannins
Oxidation
Dihydroxyphenylalanine
Carboxylic Acids
Carboxylic acids
Hydroxyl Radical
Precipitates
Color
wastewater
oxidation
Acids

ASJC Scopus subject areas

  • Pollution
  • Waste Management and Disposal

Cite this

The effect of oxidative coloration on the methanogenic toxicity and anaerobic biodegradability of phenols. / Field, James A; Lettinga, G.

In: Biological Wastes, Vol. 29, No. 3, 1989, p. 161-179.

Research output: Contribution to journalArticle

@article{6224384dc4fa40d7b9bc49e1f7f81b32,
title = "The effect of oxidative coloration on the methanogenic toxicity and anaerobic biodegradability of phenols",
abstract = "Phenolic compounds are often present in agricultural wastewater intended for anaerobic treatment. During industrial processing, storage or wastewater pretreatments, these compounds are susceptible to oxidative modifications leading to the formation of colored oxidized products. In this study, the role of the oxidative coloration on changing the methanogenic toxicity and anaerobic biodegradability of phenolic compounds was examined. Short exposures to air increased the methanogenic toxicity of monomeric phenols provided these compounds had neighboring hydroxyl groups, necessary for the coloration, and if their oxidized products lacked free carboxylic-acid groups. In contrast, a methanogenic toxic tannin, gallotannic acid (oligomeric), was detoxified by oxidative coloration. The extensive oxidation of a monomer, l-dopa, produced a dark-colored precipitate which was non-toxic. These results indicated that the initial products of the oxidation of monomers are toxic whereas highly polymerized products are non-toxic. The colorless phenolic compounds tested in this study were either partially or fully degraded (with the exception of catechol). The trihydroxyphenols were the most readily biodegradable compounds. The oxidized solutions of trihydroxyphenols were less biodegradable in proportion to their color.",
author = "Field, {James A} and G. Lettinga",
year = "1989",
doi = "10.1016/0269-7483(89)90128-6",
language = "English (US)",
volume = "29",
pages = "161--179",
journal = "Bioresource Technology",
issn = "0960-8524",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - The effect of oxidative coloration on the methanogenic toxicity and anaerobic biodegradability of phenols

AU - Field, James A

AU - Lettinga, G.

PY - 1989

Y1 - 1989

N2 - Phenolic compounds are often present in agricultural wastewater intended for anaerobic treatment. During industrial processing, storage or wastewater pretreatments, these compounds are susceptible to oxidative modifications leading to the formation of colored oxidized products. In this study, the role of the oxidative coloration on changing the methanogenic toxicity and anaerobic biodegradability of phenolic compounds was examined. Short exposures to air increased the methanogenic toxicity of monomeric phenols provided these compounds had neighboring hydroxyl groups, necessary for the coloration, and if their oxidized products lacked free carboxylic-acid groups. In contrast, a methanogenic toxic tannin, gallotannic acid (oligomeric), was detoxified by oxidative coloration. The extensive oxidation of a monomer, l-dopa, produced a dark-colored precipitate which was non-toxic. These results indicated that the initial products of the oxidation of monomers are toxic whereas highly polymerized products are non-toxic. The colorless phenolic compounds tested in this study were either partially or fully degraded (with the exception of catechol). The trihydroxyphenols were the most readily biodegradable compounds. The oxidized solutions of trihydroxyphenols were less biodegradable in proportion to their color.

AB - Phenolic compounds are often present in agricultural wastewater intended for anaerobic treatment. During industrial processing, storage or wastewater pretreatments, these compounds are susceptible to oxidative modifications leading to the formation of colored oxidized products. In this study, the role of the oxidative coloration on changing the methanogenic toxicity and anaerobic biodegradability of phenolic compounds was examined. Short exposures to air increased the methanogenic toxicity of monomeric phenols provided these compounds had neighboring hydroxyl groups, necessary for the coloration, and if their oxidized products lacked free carboxylic-acid groups. In contrast, a methanogenic toxic tannin, gallotannic acid (oligomeric), was detoxified by oxidative coloration. The extensive oxidation of a monomer, l-dopa, produced a dark-colored precipitate which was non-toxic. These results indicated that the initial products of the oxidation of monomers are toxic whereas highly polymerized products are non-toxic. The colorless phenolic compounds tested in this study were either partially or fully degraded (with the exception of catechol). The trihydroxyphenols were the most readily biodegradable compounds. The oxidized solutions of trihydroxyphenols were less biodegradable in proportion to their color.

UR - http://www.scopus.com/inward/record.url?scp=0024349785&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024349785&partnerID=8YFLogxK

U2 - 10.1016/0269-7483(89)90128-6

DO - 10.1016/0269-7483(89)90128-6

M3 - Article

VL - 29

SP - 161

EP - 179

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

IS - 3

ER -