Removal of odour-causing compounds using carbonaceous adsorbents/catalysts prepared from sewage sludge.
This paper discusses H(2)S, NH(3) and VOCs removal by sewage-sludge-derived materials with outstanding chemical and textural properties. These materials were obtained from different precursors using different chemical and thermal treatments. Results show that the H(2)S removal process entailed a catalytic conversion of H(2)S to S or SO(4) (2-) species. On the other hand, adsorption is the main mechanism governing the performance of sludge-based materials for NH(3) and VOCs. Retention capacities (x/M values) obtained for some of the sludge-based adsorbents/catalysts are similar to those obtained with commercial activated carbons selected as reference materials.
Anfruns
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Laboratori d'Enginyeria Química i Ambiental (LEQUIA), Universitat de Girona, Facultat de Ciències, Campus Montilivi s/n E- 17071, Girona, Spain. alba@lequia.udg.es
Canals-Batlle
C
C
Ros
A
A
Lillo-Ródenas
M A
MA
Linares-Solano
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Fuente
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E
Montes-Morán
M A
MA
Martin
M J
MJ
D000327:Adsorption; D000641:Ammonia / Q000302:isolation & purification*; D002384:Catalysis; D006862:Hydrogen Sulfide / Q000302:isolation & purification*; D009812:Odorants; D012722:Sewage / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D012722:Sewage; D055549:Volatile Organic Compounds; D000641:Ammonia; D006862:Hydrogen Sulfide