论文部分内容阅读
用氢氧化钠水溶液预处理,以乙二胺作交联剂,采用环氧氯丙烷和二甲胺对网状植物丝瓜络纤维进行化学改性,制备出改性丝瓜络阴离子交换纤维(LS-AEF),重点探讨了LS-AEF的形态特征并对其形态特征进行了表征分析,还考察了碱预处理对产品吸附水体中的NO-3的影响。研究结果表明,(1)LS-AEF引入带正电的胺基基团,可以提高对NO-3的吸附性能;(2)乙二胺剂量对产品吸附性能影响比较大,最佳剂量为9 mL,吸附率达到75%;(3)碱性预处理能够显著提高产品的吸附性能,碱处理前后的产品吸附率分别为76%和85%;(4)吸附过程符合伪二级动力学方程。
Pretreatment with aqueous sodium hydroxide solution, ethylenediamine as crosslinking agent, the use of epichlorohydrin and dimethylamine reticulose loofah fiber chemical modification to prepare a modified loofah anion exchange fiber (LS- AEF). The morphological characteristics of LS-AEF were discussed and its morphological characteristics were analyzed. The effects of alkali pretreatment on the adsorption of NO-3 in water were also investigated. The results showed that: (1) The introduction of positively charged amino groups into LS-AEF could improve the adsorption capacity of NO-3; (2) The dosage of ethylenediamine had a great effect on the adsorption performance of the product with the best dosage of 9 mL, the adsorption rate reached 75%; (3) Alkaline pretreatment can significantly improve the adsorption performance of the product, the adsorption rate of products before and after alkali treatment were 76% and 85% respectively; (4) The adsorption process accorded with pseudo second- .