摘要： 以市政污泥为原料制备污泥活性炭（SAC），并利用氨水对其进行改性，考察低温条件下，氨水质量分数和改性时间对SAC吸附性能的影响。结果表明，在氨水质量分数为15%，改性时间为8 h的最佳条件下，改性SAC（MSAC）的碘吸附值达到386.5 mg/g。氨水改性使SAC的比表面积和总孔容分别提高了78.3%和97.5%，同时降低了SAC表面的羧基、酚羟基等酸性含氧官能团。此外，将MSAC应用于处理焦化废水，结果表明，投加量为60 g/L，pH为8，吸附时间为80 min时，挥发酚和氰化物的去除率分别为66.2%和76.7%。

关键词: 污泥活性炭, 低温氨水改性, 焦化废水, 脱酚除氰

Abstract: Municipal sludge has been used as raw materials for the preparation of sludge-based activated carbon (SAC), and aqueous ammonia used for its modification. The results show that the influences of the mass fraction and modification time of aqueous ammonia on the adsorption capability of SAC under low temperature have been investigated. The optimal conditions are as follows,the mass fraction of ammonia is 15%, and modification time 8 h, the iodine adsorption value of modified SAC(MSAC) reaches 386.5 mg/g. The modification of aqueous ammonia causes the increase of specific surface area and total pore volume of MSAC by 78.3% and 97.5%, respectively, and the decrease of the acidic oxygen-containing functional groups such as carboxyl and phenolic hydroxyl on SAC surface. Furthermore, the MSAC has been applied to the treatment of coking wastewater. The results show that the removing rates of phenol and cyanide are 66.2% and 76.7%, respectively, when MSAC dosage is 60 g/L, pH=8, and adsorption time 80 min.

Key words: sludge-based activated carbon, low-temperature aqueous ammonia modification, coking wastewater, phenol and cyanide removal

中图分类号: 

• X703.1