多胺型稻草纤维素球的制备及其对水体中Zn^(2+)的吸附性能

Preparation and Absorption Properties of Polyamine Straw Cellulose Spheres

以天然纤维素中的农副产品稻草秸秆为原料,制备了环氧基球形纤维素,并使之多胺化,制备了具有较好机械性能和良好水力学性能的多胺型稻草纤维素球。静态吸附结果表明,改性稻草纤维素球TVTA、TEPA、TMDA对水体中Zn2+的饱和吸附量分别为17.58、4.04和6.54 mg/g。用机械性能和水力学性能较好的TVTA制备分离柱,应用于江河水体中Zn2+的分离富集,建立了TVTA-分离富集-火焰原子吸收分光光度法测定水体中痕量Zn2+总量的方法,测定了南充西河、嘉陵江水体中Zn2+的含量。

Natural cellulose in farm by-products such as bagasse or straw stalk was choosen as the material. After epoxy straw cellulose was treated with polyamines, polyamine straw cellulose spheres（ SS-MB-TVTA, SS- MB-TEPA, SS-MB-TMDA） with good hydrodynamic and mechanical performance were prepared. They can adsorb heavy metals ions from water（ for example, the static adsorption capacity of three kinds of polyamine straw cellulose spheres for Zn^2＋ were 17.58, 4.04, and 6. 54 mg/g, respectively）. SS-MB-TVTA with better hydrodynamic property was chosen to prepare separation columns, which was applied to enrich and separate Zn^2＋. A method of analyzing trace amount of zinc in water after enrichment on SS-MB-TVTA by FAAS was established, and the Zn^2＋ concentrations in the water of Xihe River and Jialingjiang River were determined.