Characterization Of Cellulose/Sodium Alginate Composite Microspheres And Its Application In The Metal Recycling

As we all know, it is imperative to search and develop a cheap and greenpolymer material, because of the shortage of resources and the pollution environment.In the nature, cellulose and sodium alginate both are abundant resource. Cellulose andsodium alginate are widely used in waste water treatment and medical field due todegradability and biological compatibility. However，the application of cellulose isrestricted to some extent, because of the strong hydrogen bonding. Sodium alginatehas potential application in the wastewater treatment due to its high cation exchangecapacity. So the use of sodium alginate is restricted.Series of crosslinked microspheres were prepared via a new type of solventsystem（NaOH/urea solution） to evaluate their performance of the structure. At thesame time, we discuss its application in the metal recycling by using metal ions liquoras a model.Main work is as follows:1. Preparation and characterization of series crosslinked microspheres.2. Adsorption and regeneration of heavy metal ions(Cu²⁺、Pb²⁺)by usingcrosslinked micropheres.3. Adsorption and regeneration of rare earth metal ions(La³⁺、Pr³⁺) by usingcrosslinked micropheres.The conclusion is as follows:1. Crosslinked microspheres surface present close mesh structure, and uniformparticle size distribution.2. Sodium alginate content, intial metal ions concentration（co）, temperature（T）,adsorbent concentration dose（m） and pH, can affect the removal rate andadsorption quantity to some extent.3. Through simulation equation, we can conclusion that the process is achemical course of single molecular adsorption.In a word, cellulose/sodium alginate blended microspheres adsorption andrecovery of the metal ions in wastewater effectively. The blended materials are greenchemical products.