含硫纤维素衍生物的性能研究(英文)

Studies on the properties of the sulfur-containing cellulose derivatives

研究了含硫纤维素衍生物:巯基纤维素(SC)和纤维素磺原酸酯(CCX)这两种材料的性能及它们对重金属离子的吸附性能和吸附机理。实验表明,含硫纤维素衍生物作为一种固体吸附材料其化学性质比无机硫化物稳定,暴露于空气中放置一个月后,SC和CCX含硫量下降率<10%,在室温下,中性水溶液中浸泡10天,其水解率<3%;SC饱和吸附容量(mg/g)为:Hg2+58、Cu2+17、Pb2+55、Cd2+29,CCX饱和吸附容量(mg/g)为:Hg2+ 82、Cu2+26、Pb2+77、Cd2+49;SC和CCX都易于再生,再生10次后其对重金属离子的饱和吸附容量不变。

In this paper, the properties of sulfur-containing cellulose derivatives, sulfhydryl cellulose (SC) and cotton cellulose xantante (CCX), were studied as well as their adsorption properties and mechanisms to heavy metal ions. It is proved by the experiments that the chemical properties of sulfur-containing cellulose derivatives which are excellent kinds of solid adsorbent are more stable than inorganic sulfides. Their sulfur content reduced lower than 10% when they were exposed in air for one month. Their hydrolytic ratio was less than 3% when they were soaked in neutral aqueous solution for 10 days at room temperature. And the saturated adsorption capacity of SC was Hg2+ 58 mg/g, Cu2+ 17 mg/g, Pb2+ 55 mg/g, Cd2+ 29 mg/g, while that of CCX was Hg2+ 82 mg/g, Cu2+ 26 mg/g, Pb2+ 77 mg/g, Cd2+ 49 mg/g respectively. Furthermore, their adsorption capacities on heavy metal ions were not reduced when they were regenerated for 10 times.