Removal of odour-causing compounds using carbonaceous adsorbents/catalysts prepared from sewage sludge

摘要

This paper discusses H2S, NH3 and VOCs removal by sewage-sludge-derived materials withnoutstanding chemical and textural properties. These materials were obtained from differentnprecursors using different chemical and thermal treatments. Results show that the H2Snremoval process entailed a catalytic conversion of H2S to S or SO22n4 species. On the other hand,nadsorption is the main mechanism governing the performance of sludge-based materials fornNH3 and VOCs. Retention capacities (x/M values) obtained for some of the sludge–basednadsorbents/catalysts are similar to those obtained with commercial activated carbons selectednas reference materials.