Evaluation of surface properties of exhausted carbons used as H2S adsorbents in sewage treatment plants

被引：58

作者：

Bandosz, TJ ^{[1
]}

Le, Q ^{[1
]}

机构：

[1] CUNY City Coll, Dept Chem, New York, NY 10031 USA

来源：

CARBON | 1998年 / 36卷 / 1-2期

关键词：

activated carbon; thermal analysis; adsorption properties; functional groups;

D O I：

10.1016/S0008-6223(97)00148-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Physical and chemical properties of carbons previously used for air purification in sewage plants are investigated. The chosen samples are characterized by pH values (estimated according to ASTM D 3838) between 2 and 10. Their H2S breakthrough capacities are less than 0.01 g of H2S/cm(3) of carbon. The surface chemistry and porous structure are determined using sorption of nitrogen. The influence of carbon pH and the type of deposited species on the capacity for physical adsorption are discussed. Compounds adsorbed/bound on the surface as a result of long term exposure to H2S are evaluated using potentiometric titration. Thermogravimetric analysis in inert and oxidizing atmospheres reveals the dependence of ignition temperature on the surface chemistry of the sorbent (chemical compounds bound/deposited on the surface). (C) 1997 Elsevier Science Ltd.

引用

页码：39 / 44

页数：6

共 18 条

[1] Effect of electrolytic oxidation upon the surface chemistry of type a carbon fibres .3. Chemical state, source and location of surface nitrogen [J].