Bagreev Andrey, Bandosz Teresa J
Department of Chemistry and The International Center for Environmental Resources and Development, City College of New York, City University of New York, New York, New York 10031, USA.
J Colloid Interface Sci. 2002 Aug 1;252(1):188-94. doi: 10.1006/jcis.2002.8419.
Sewage sludge-derived fertilizer, Terrene, was used as a precursor of adsorbents tested for removal of hydrogen sulfide from moist air. The adsorbents were obtained by pyrolysis of sulfuric acid-treated granular fertilizer at 600, 800, and 950 degrees C in a nitrogen atmosphere. The highest H(2)S removal capacity was obtained for the sample carbonized at 950 degrees C. This is a result of a combined effect of the specific chemistry of the inorganic phase and the development of microporosity within the carbon deposit. On the surface of the materials studied hydrogen sulfide is converted to elemental sulfur, sulfides, and sulfates as a result of the reaction with salts/oxides and the presence of an oxidizing atmosphere. The pores are gradually filled as the surface reactions proceed. The removal of H(2)S occurs until all the small micropores are filled with the reaction/oxidation products.
源自污水污泥的肥料Terrene被用作吸附剂的前驱体，用于测试从潮湿空气中去除硫化氢。这些吸附剂是通过在氮气气氛中于600、800和950摄氏度下对硫酸处理过的颗粒肥料进行热解而获得的。在950摄氏度下碳化的样品具有最高的硫化氢去除能力。这是无机相特定化学性质和碳沉积物中微孔形成共同作用的结果。在所研究材料的表面，由于与盐/氧化物的反应以及氧化气氛的存在，硫化氢被转化为元素硫、硫化物和硫酸盐。随着表面反应的进行，孔隙逐渐被填满。硫化氢的去除会一直持续到所有小微孔都被反应/氧化产物填满为止。
