萘和菲在纺织品上的吸附行为研究

Adsorption Behavior of Naphthalene and Phenanthrene on Textiles

研究了萘和菲在各类纺织品上的吸附行为,并考察了温度对萘和菲吸附的影响。结果表明:萘和菲在5种纺织品上的吸附等温线较好地符合Freundlich吸附模式;纺织品对萘和菲的吸附能力同纺织纤维芳香度呈一定的相关性,其吸附能力大小顺序为:涤纶>丝绸>羊毛>棉>锦纶;温度的提高,降低了萘和菲在涤纶上的吸附量;热力学研究表明,萘和菲在涤纶上的吸附焓变ΔH、自由能变ΔG均小于0,表明萘和菲在涤纶上的吸附是一个自发的放热过程。

The adsorption behaviors of naphthalene and phenanthrene on various fabrics were investigated. The influence of temperature on the adsorption of naphthalene and phenanthrene on fabric was discussed. The adsorption kinetics can be well fitted by the pseudo-second-order model. The affinities of naphthalene and phenanthrene for five textiles were correlated with the fiber aromaticity. The decreasing order of the naphthalene and phenanthrene adsorption capacities was as follows： PET fabric〉silk fabric〉 wool fabric〉cotton fabric〉PA fabric. The adsorbed amount of phenanthrene was higher than that of naphthalene on the same fabric. With increased temperature, the adsorbed quantity of naphthalene and phenanthrene on PET fabric decreased. Thermodynamic analysis showed that △H〈0 and △G〈0, which indicated that the adsorption process was exothermic and spontaneous.