Exhaustive extraction of linear (LAS) and branched (TPS) alkylbenzene sulphonates, nonylphenol (NP) and nonylphenol monoethoxylate (NP1EO) from landfilled sludge were attained by using a polar solvent (methanol) and by adding sodium hydroxide (20%, w/w) to the dry sludge. In the absence of NaOH, or if moderately polar (dichloromethane) to apolar (hexane) solvents were used, poor extraction efficiencies (< 50%) were obtained, in contrast to the results obtained for fresh sludges. In one set of the examined sludge-only landfills, removal by biodegradation of LAS, NP, and NP1EO was minimal over 15 years. In the other set of landfills, both LAS and NP, NP1EO disappeared to a great extent (> 90%) over the same time period. The remarkably different behaviour of these compounds was ascribed to the landfill operating conditions, to be anaerobic when no biodegradation was observed, and aerobic when the title compounds were removed.

Exhaustive extraction of linear (LAS) and branched (TPS) alkylbenzene sulphonates, nonylphenol (NP) and nonylphenol monoethoxylate (NP1EO) from landfilled sludge were attained by using a polar solvent (methanol) and by adding sodium hydroxide (20%, w/w) to the dry sludge. In the absence of NaOH, or if moderately polar (dichloromethane) to apolar (hexane) solvents were used, poor extraction efficiencies (< 50%) were obtained, in contrast to the results obtained for fresh sludges. In one set of the examined sludge-only landfills, removal by biodegradation of LAS, NP, and NP1EO was minimal over 15 years. In the other set of landfills, both LAS and NP, NP1EO disappeared to a great extent (> 90%) over the same time period. The remarkably different behaviour of these compounds was ascribed to the landfill operating conditions, to be anaerobic when no biodegradation was observed, and aerobic when the title compounds were removed.

ANALYTICAL EXTRACTION AND ENVIRONMENTAL REMOVAL OF ALKYLBENZENE SULFONATES, NONYLPHENOL AND NONYLPHENOL MONOETHOXYLATE FROM DATED SLUDGE-ONLY LANDFILLS

MARCOMINI, Antonio;SFRISO, Adriano
1991

Abstract

Exhaustive extraction of linear (LAS) and branched (TPS) alkylbenzene sulphonates, nonylphenol (NP) and nonylphenol monoethoxylate (NP1EO) from landfilled sludge were attained by using a polar solvent (methanol) and by adding sodium hydroxide (20%, w/w) to the dry sludge. In the absence of NaOH, or if moderately polar (dichloromethane) to apolar (hexane) solvents were used, poor extraction efficiencies (< 50%) were obtained, in contrast to the results obtained for fresh sludges. In one set of the examined sludge-only landfills, removal by biodegradation of LAS, NP, and NP1EO was minimal over 15 years. In the other set of landfills, both LAS and NP, NP1EO disappeared to a great extent (> 90%) over the same time period. The remarkably different behaviour of these compounds was ascribed to the landfill operating conditions, to be anaerobic when no biodegradation was observed, and aerobic when the title compounds were removed.
File in questo prodotto:
File Dimensione Formato  
(20a) Environmental Technology, 12 (1991) 1047-1054..pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Accesso chiuso-personale
Dimensione 3.62 MB
Formato Adobe PDF
3.62 MB Adobe PDF   Visualizza/Apri

I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10278/14692
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 11
social impact